bench-forgejo/services/repository/archiver/archiver.go

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// Copyright 2020 The Gitea Authors. All rights reserved.
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package archiver
import (
"context"
"errors"
"fmt"
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
"io"
"os"
"regexp"
"strings"
"time"
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
"code.gitea.io/gitea/models/db"
repo_model "code.gitea.io/gitea/models/repo"
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/queue"
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/storage"
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
)
// ArchiveRequest defines the parameters of an archive request, which notably
// includes the specific repository being archived as well as the commit, the
// name by which it was requested, and the kind of archive being requested.
// This is entirely opaque to external entities, though, and mostly used as a
// handle elsewhere.
type ArchiveRequest struct {
RepoID int64
refName string
Type git.ArchiveType
CommitID string
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
// SHA1 hashes will only go up to 40 characters, but SHA256 hashes will go all
// the way to 64.
var shaRegex = regexp.MustCompile(`^[0-9a-f]{4,64}$`)
// ErrUnknownArchiveFormat request archive format is not supported
type ErrUnknownArchiveFormat struct {
RequestFormat string
}
// Error implements error
func (err ErrUnknownArchiveFormat) Error() string {
return fmt.Sprintf("unknown format: %s", err.RequestFormat)
}
// Is implements error
func (ErrUnknownArchiveFormat) Is(err error) bool {
_, ok := err.(ErrUnknownArchiveFormat)
return ok
}
// NewRequest creates an archival request, based on the URI. The
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
// resulting ArchiveRequest is suitable for being passed to ArchiveRepository()
// if it's determined that the request still needs to be satisfied.
func NewRequest(repoID int64, repo *git.Repository, uri string) (*ArchiveRequest, error) {
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
r := &ArchiveRequest{
RepoID: repoID,
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
var ext string
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
switch {
case strings.HasSuffix(uri, ".zip"):
ext = ".zip"
r.Type = git.ZIP
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
case strings.HasSuffix(uri, ".tar.gz"):
ext = ".tar.gz"
r.Type = git.TARGZ
case strings.HasSuffix(uri, ".bundle"):
ext = ".bundle"
r.Type = git.BUNDLE
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
default:
return nil, ErrUnknownArchiveFormat{RequestFormat: uri}
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
r.refName = strings.TrimSuffix(uri, ext)
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
var err error
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
// Get corresponding commit.
if repo.IsBranchExist(r.refName) {
r.CommitID, err = repo.GetBranchCommitID(r.refName)
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
if err != nil {
return nil, err
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
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r.CommitID, err = repo.GetTagCommitID(r.refName)
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
if err != nil {
return nil, err
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
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r.CommitID = r.refName
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return nil, git.ErrNotExist{
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[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
} else {
return nil, fmt.Errorf("Unknow ref %s type", r.refName)
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
return r, nil
}
// GetArchiveName returns the name of the caller, based on the ref used by the
// caller to create this request.
func (aReq *ArchiveRequest) GetArchiveName() string {
return strings.ReplaceAll(aReq.refName, "/", "-") + "." + aReq.Type.String()
}
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
func doArchive(r *ArchiveRequest) (*repo_model.RepoArchiver, error) {
txCtx, committer, err := db.TxContext()
if err != nil {
return nil, err
}
defer committer.Close()
ctx, _, finished := process.GetManager().AddContext(txCtx, fmt.Sprintf("ArchiveRequest[%d]: %s", r.RepoID, r.GetArchiveName()))
defer finished()
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
archiver, err := repo_model.GetRepoArchiver(ctx, r.RepoID, r.Type, r.CommitID)
if err != nil {
return nil, err
}
if archiver != nil {
// FIXME: If another process are generating it, we think it's not ready and just return
// Or we should wait until the archive generated.
if archiver.Status == repo_model.ArchiverGenerating {
return nil, nil
}
} else {
archiver = &repo_model.RepoArchiver{
RepoID: r.RepoID,
Type: r.Type,
CommitID: r.CommitID,
Status: repo_model.ArchiverGenerating,
}
if err := repo_model.AddRepoArchiver(ctx, archiver); err != nil {
return nil, err
}
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
rPath, err := archiver.RelativePath()
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
if err != nil {
return nil, err
}
_, err = storage.RepoArchives.Stat(rPath)
if err == nil {
if archiver.Status == repo_model.ArchiverGenerating {
archiver.Status = repo_model.ArchiverReady
if err = repo_model.UpdateRepoArchiverStatus(ctx, archiver); err != nil {
return nil, err
}
}
return archiver, committer.Commit()
}
if !errors.Is(err, os.ErrNotExist) {
return nil, fmt.Errorf("unable to stat archive: %v", err)
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
rd, w := io.Pipe()
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
defer func() {
w.Close()
rd.Close()
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}()
done := make(chan error)
repo, err := repo_model.GetRepositoryByID(archiver.RepoID)
if err != nil {
return nil, fmt.Errorf("archiver.LoadRepo failed: %v", err)
}
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
gitRepo, err := git.OpenRepositoryCtx(ctx, repo.RepoPath())
if err != nil {
return nil, err
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
defer gitRepo.Close()
go func(done chan error, w *io.PipeWriter, archiver *repo_model.RepoArchiver, gitRepo *git.Repository) {
defer func() {
if r := recover(); r != nil {
done <- fmt.Errorf("%v", r)
}
}()
if archiver.Type == git.BUNDLE {
err = gitRepo.CreateBundle(
ctx,
archiver.CommitID,
w,
)
} else {
err = gitRepo.CreateArchive(
ctx,
archiver.Type,
w,
setting.Repository.PrefixArchiveFiles,
archiver.CommitID,
)
}
_ = w.CloseWithError(err)
done <- err
}(done, w, archiver, gitRepo)
// TODO: add lfs data to zip
// TODO: add submodule data to zip
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
if _, err := storage.RepoArchives.Save(rPath, rd, -1); err != nil {
return nil, fmt.Errorf("unable to write archive: %v", err)
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
err = <-done
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
if err != nil {
return nil, err
}
if archiver.Status == repo_model.ArchiverGenerating {
archiver.Status = repo_model.ArchiverReady
if err = repo_model.UpdateRepoArchiverStatus(ctx, archiver); err != nil {
return nil, err
}
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
return archiver, committer.Commit()
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
// ArchiveRepository satisfies the ArchiveRequest being passed in. Processing
// will occur in a separate goroutine, as this phase may take a while to
// complete. If the archive already exists, ArchiveRepository will not do
// anything. In all cases, the caller should be examining the *ArchiveRequest
// being returned for completion, as it may be different than the one they passed
// in.
func ArchiveRepository(request *ArchiveRequest) (*repo_model.RepoArchiver, error) {
return doArchive(request)
}
var archiverQueue queue.UniqueQueue
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
// Init initlize archive
func Init() error {
handler := func(data ...queue.Data) []queue.Data {
for _, datum := range data {
archiveReq, ok := datum.(*ArchiveRequest)
if !ok {
log.Error("Unable to process provided datum: %v - not possible to cast to IndexerData", datum)
continue
}
log.Trace("ArchiverData Process: %#v", archiveReq)
if _, err := doArchive(archiveReq); err != nil {
log.Error("Archive %v failed: %v", datum, err)
}
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
return nil
}
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
archiverQueue = queue.CreateUniqueQueue("repo-archive", handler, new(ArchiveRequest))
if archiverQueue == nil {
return errors.New("unable to create codes indexer queue")
}
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
go graceful.GetManager().RunWithShutdownFns(archiverQueue.Run)
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
return nil
}
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
// StartArchive push the archive request to the queue
func StartArchive(request *ArchiveRequest) error {
has, err := archiverQueue.Has(request)
if err != nil {
return err
}
if has {
return nil
}
return archiverQueue.Push(request)
[RFC] Make archival asynchronous (#11296) * Make archival asynchronous The prime benefit being sought here is for large archives to not clog up the rendering process and cause unsightly proxy timeouts. As a secondary benefit, archive-in-progress is moved out of the way into a /tmp file so that new archival requests for the same commit will not get fulfilled based on an archive that isn't yet finished. This asynchronous system is fairly primitive; request comes in, we'll spawn off a new goroutine to handle it, then we'll mark it as done. Status requests will see if the file exists in the final location, and report the archival as done when it exists. Fixes #11265 * Archive links: drop initial delay to three-quarters of a second Some, or perhaps even most, archives will not take all that long to archive. The archive process starts as soon as the download button is initially clicked, so in theory they could be done quite quickly. Drop the initial delay down to three-quarters of a second to make it more responsive in the common case of the archive being quickly created. * archiver: restructure a little bit to facilitate testing This introduces two sync.Cond pointers to the archiver package. If they're non-nil when we go to process a request, we'll wait until signalled (at all) to proceed. The tests will then create the sync.Cond so that it can signal at-will and sanity-check the state of the queue at different phases. The author believes that nil-checking these two sync.Cond pointers on every archive processing will introduce minimal overhead with no impact on maintainability. * gofmt nit: no space around binary + operator * services: archiver: appease golangci-lint, lock queueMutex Locking/unlocking the queueMutex is allowed, but not required, for Cond.Signal() and Cond.Broadcast(). The magic at play here is just a little too much for golangci-lint, as we take the address of queueMutex and this is mostly used in archiver.go; the variable still gets flagged as unused. * archiver: tests: fix several timing nits Once we've signaled a cond var, it may take some small amount of time for the goroutines released to hit the spot we're wanting them to be at. Give them an appropriate amount of time. * archiver: tests: no underscore in var name, ungh * archiver: tests: Test* is run in a separate context than TestMain We must setup the mutex/cond variables at the beginning of any test that's going to use it, or else these will be nil when the test is actually ran. * archiver: tests: hopefully final tweak Things got shuffled around such that we carefully build up and release requests from the queue, so we can validate the state of the queue at each step. Fix some assertions that no longer hold true as fallout. * repo: Download: restore some semblance of previous behavior When archival was made async, the GET endpoint was only useful if a previous POST had initiated the download. This commit restores the previous behavior, to an extent; we'll now submit the archive request there and return a "202 Accepted" to indicate that it's processing if we didn't manage to complete the request within ~2 seconds of submission. This lets a client directly GET the archive, and gives them some indication that they may attempt to GET it again at a later time. * archiver: tests: simplify a bit further We don't need to risk failure and use time.ParseDuration to get 2 * time.Second. else if isn't really necessary if the conditions are simple enough and lead to the same result. * archiver: tests: resolve potential source of flakiness Increase all timeouts to 10 seconds; these aren't hard-coded sleeps, so there's no guarantee we'll actually take that long. If we need longer to not have a false-positive, then so be it. While here, various assert.{Not,}Equal arguments are flipped around so that the wording in error output reflects reality, where the expected argument is second and actual third. * archiver: setup infrastructure for notifying consumers of completion This API will *not* allow consumers to subscribe to specific requests being completed, just *any* request being completed. The caller is responsible for determining if their request is satisfied and waiting again if needed. * repo: archive: make GET endpoint synchronous again If the request isn't complete, this endpoint will now submit the request and wait for completion using the new API. This may still be susceptible to timeouts for larger repos, but other endpoints now exist that the web interface will use to negotiate its way through larger archive processes. * archiver: tests: amend test to include WaitForCompletion() This is a trivial one, so go ahead and include it. * archiver: tests: fix test by calling NewContext() The mutex is otherwise uninitialized, so we need to ensure that we're actually initializing it if we plan to test it. * archiver: tests: integrate new WaitForCompletion a little better We can use this to wait for archives to come in, rather than spinning and hoping with a timeout. * archiver: tests: combine numQueued declaration with next-instruction assignment * routers: repo: reap unused archiving flag from DownloadStatus() This had some planned usage before, indicating whether this request initiated the archival process or not. After several rounds of refactoring, this use was deemed not necessary for much of anything and got boiled down to !complete in all cases. * services: archiver: restructure to use a channel We now offer two forms of waiting for a request: - WaitForCompletion: wait for completion with no timeout - TimedWaitForCompletion: wait for completion with timeout In both cases, we wait for the given request's cchan to close; in the latter case, we do so with the caller-provided timeout. This completely removes the need for busy-wait loops in Download/InitiateDownload, as it's fairly clean to wait on a channel with timeout. * services: archiver: use defer to unlock now that we can This previously carried the lock into the goroutine, but an intermediate step just added the request to archiveInProgress outside of the new goroutine and removed the need for the goroutine to start out with it. * Revert "archiver: tests: combine numQueued declaration with next-instruction assignment" This reverts commit bcc52140238e16680f2e05e448e9be51372afdf5. Revert "archiver: tests: integrate new WaitForCompletion a little better" This reverts commit 9fc8bedb5667d24d3a3c7843dc28a229efffb1e6. Revert "archiver: tests: fix test by calling NewContext()" This reverts commit 709c35685eaaf261ebbb7d3420e3376a4ee8e7f2. Revert "archiver: tests: amend test to include WaitForCompletion()" This reverts commit 75261f56bc05d1fa8ff7e81dcbc0ccd93fdc9d50. * archiver: tests: first attempt at WaitForCompletion() tests * archiver: tests: slight improvement, less busy-loop Just wait for the requests to complete in order, instead of busy-waiting with a timeout. This is slightly less fragile. While here, reverse the arguments of a nearby assert.Equal() so that expected/actual are correct in any test output. * archiver: address lint nits * services: archiver: only close the channel once * services: archiver: use a struct{} for the wait channel This makes it obvious that the channel is only being used as a signal, rather than anything useful being piped through it. * archiver: tests: fix expectations Move the close of the channel into doArchive() itself; notably, before these goroutines move on to waiting on the Release cond. The tests are adjusted to reflect that we can't WaitForCompletion() after they've already completed, as WaitForCompletion() doesn't indicate that they've been released from the queue yet. * archiver: tests: set cchan to nil for comparison * archiver: move ctx.Error's back into the route handlers We shouldn't be setting this in a service, we should just be validating the request that we were handed. * services: archiver: use regex to match a hash This makes sure we don't try and use refName as a hash when it's clearly not one, e.g. heads/pull/foo. * routers: repo: remove the weird /archive/status endpoint We don't need to do this anymore, we can just continue POSTing to the archive/* endpoint until we're told the download's complete. This avoids a potential naming conflict, where a ref could start with "status/" * archiver: tests: bump reasonable timeout to 15s * archiver: tests: actually release timedReq * archiver: tests: run through inFlight instead of manually checking While we're here, add a test for manually re-processing an archive that's already been complete. Re-open the channel and mark it incomplete, so that doArchive can just mark it complete again. * initArchiveLinks: prevent default behavior from clicking * archiver: alias gitea's context, golang context import pending * archiver: simplify logic, just reconstruct slices While the previous logic was perhaps slightly more efficient, the new variant's readability is much improved. * archiver: don't block shutdown on waiting for archive The technique established launches a goroutine to do the wait, which will close a wait channel upon termination. For the timeout case, we also send back a value indicating whether the timeout was hit or not. The timeouts are expected to be relatively small, but still a multi- second delay to shutdown due to this could be unfortunate. * archiver: simplify shutdown logic We can just grab the shutdown channel from the graceful manager instead of constructing a channel to halt the caller and/or pass a result back. * Style issues * Fix mis-merge Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Lauris BH <lauris@nix.lv>
2020-11-08 01:57:28 +05:30
}
func deleteOldRepoArchiver(ctx context.Context, archiver *repo_model.RepoArchiver) error {
p, err := archiver.RelativePath()
if err != nil {
return err
}
if err := repo_model.DeleteRepoArchiver(ctx, archiver); err != nil {
return err
}
if err := storage.RepoArchives.Delete(p); err != nil {
log.Error("delete repo archive file failed: %v", err)
}
return nil
}
// DeleteOldRepositoryArchives deletes old repository archives.
func DeleteOldRepositoryArchives(ctx context.Context, olderThan time.Duration) error {
log.Trace("Doing: ArchiveCleanup")
for {
archivers, err := repo_model.FindRepoArchives(repo_model.FindRepoArchiversOption{
ListOptions: db.ListOptions{
PageSize: 100,
Page: 1,
},
OlderThan: olderThan,
})
if err != nil {
log.Trace("Error: ArchiveClean: %v", err)
return err
}
for _, archiver := range archivers {
if err := deleteOldRepoArchiver(ctx, archiver); err != nil {
return err
}
}
if len(archivers) < 100 {
break
}
}
log.Trace("Finished: ArchiveCleanup")
return nil
}
// DeleteRepositoryArchives deletes all repositories' archives.
func DeleteRepositoryArchives(ctx context.Context) error {
if err := repo_model.DeleteAllRepoArchives(); err != nil {
return err
}
return storage.Clean(storage.RepoArchives)
}