forgejo-federation/modules/log/event.go
silverwind 47748df9b3
Enable forbidigo linter (#24278)
Enable [forbidigo](https://github.com/ashanbrown/forbidigo) linter which
forbids print statements. Will check how to integrate this with the
smallest impact possible, so a few `nolint` comments will likely be
required. Plan is to just go through the issues and either:

- Remove the print if it is nonsensical
- Add a `//nolint` directive if it makes sense

I don't plan on investigating the individual issues any further.

<details>
<summary>Initial Lint Results</summary>

```
modules/log/event.go:348:6: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

					fmt.Println(err)

					^

modules/log/event.go:382:6: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

					fmt.Println(err)

					^

modules/queue/unique_queue_disk_channel_test.go:20:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("TempDir %s\n", tmpDir)

	^

contrib/backport/backport.go:168:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("* Backporting %s to %s as %s\n", pr, localReleaseBranch, backportBranch)

	^

contrib/backport/backport.go:216:4: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

			fmt.Printf("* Navigate to %s to open PR\n", url)

			^

contrib/backport/backport.go:223:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("* `xdg-open %s`\n", url)

	^

contrib/backport/backport.go:233:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("* `git push -u %s %s`\n", remote, backportBranch)

	^

contrib/backport/backport.go:243:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("* Amending commit to prepend `Backport #%s` to body\n", pr)

	^

contrib/backport/backport.go:272:3: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Println("* Attempting git cherry-pick --continue")

		^

contrib/backport/backport.go:281:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("* Attempting git cherry-pick %s\n", sha)

	^

contrib/backport/backport.go:297:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("* Current branch is %s\n", currentBranch)

	^

contrib/backport/backport.go:299:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("* Current branch is %s - not checking out\n", currentBranch)

		^

contrib/backport/backport.go:304:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("* Branch %s already exists. Checking it out...\n", backportBranch)

		^

contrib/backport/backport.go:308:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("* `git checkout -b %s %s`\n", backportBranch, releaseBranch)

	^

contrib/backport/backport.go:313:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("* `git fetch %s main`\n", remote)

	^

contrib/backport/backport.go:316:3: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Println(string(out))

		^

contrib/backport/backport.go:319:2: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Println(string(out))

	^

contrib/backport/backport.go:321:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("* `git fetch %s %s`\n", remote, releaseBranch)

	^

contrib/backport/backport.go:324:3: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Println(string(out))

		^

contrib/backport/backport.go:327:2: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Println(string(out))

	^

models/unittest/fixtures.go:50:3: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Println("Unsupported RDBMS for integration tests")

		^

models/unittest/fixtures.go:89:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("LoadFixtures failed after retries: %v\n", err)

		^

models/unittest/fixtures.go:110:4: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

			fmt.Printf("Failed to generate sequence update: %v\n", err)

			^

models/unittest/fixtures.go:117:6: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

					fmt.Printf("Failed to update sequence: %s Error: %v\n", value, err)

					^

models/migrations/base/tests.go:118:3: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Println("Environment variable $GITEA_ROOT not set")

		^

models/migrations/base/tests.go:127:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("Could not find gitea binary at %s\n", setting.AppPath)

		^

models/migrations/base/tests.go:134:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("Environment variable $GITEA_CONF not set - defaulting to %s\n", giteaConf)

		^

models/migrations/base/tests.go:145:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("Unable to create temporary data path %v\n", err)

		^

models/migrations/base/tests.go:154:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("Unable to InitFull: %v\n", err)

		^

models/migrations/v1_11/v112.go:34:5: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

				fmt.Printf("Error: %v", err)

				^

contrib/fixtures/fixture_generation.go:36:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("CreateTestEngine: %+v", err)

		^

contrib/fixtures/fixture_generation.go:40:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("PrepareTestDatabase: %+v\n", err)

		^

contrib/fixtures/fixture_generation.go:46:5: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

				fmt.Printf("generate '%s': %+v\n", r, err)

				^

contrib/fixtures/fixture_generation.go:53:5: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

				fmt.Printf("generate '%s': %+v\n", g.name, err)

				^

contrib/fixtures/fixture_generation.go:71:4: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

			fmt.Printf("%s created.\n", path)

			^

services/gitdiff/gitdiff_test.go:543:2: use of `println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	println(result)

	^

services/gitdiff/gitdiff_test.go:560:2: use of `println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	println(result)

	^

services/gitdiff/gitdiff_test.go:577:2: use of `println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	println(result)

	^

modules/web/routing/logger_manager.go:34:2: use of `print` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	print Printer

	^

modules/doctor/paths.go:109:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("Warning: can't remove temporary file: '%s'\n", tmpFile.Name())

		^

tests/test_utils.go:33:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf(format+"\n", args...)

	^

tests/test_utils.go:61:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("Environment variable $GITEA_CONF not set, use default: %s\n", giteaConf)

		^

cmd/actions.go:54:9: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	_, _ = fmt.Printf("%s\n", respText)

	       ^

cmd/admin_user_change_password.go:74:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("%s's password has been successfully updated!\n", user.Name)

	^

cmd/admin_user_create.go:109:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("generated random password is '%s'\n", password)

		^

cmd/admin_user_create.go:164:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("Access token was successfully created... %s\n", t.Token)

		^

cmd/admin_user_create.go:167:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("New user '%s' has been successfully created!\n", username)

	^

cmd/admin_user_generate_access_token.go:74:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("%s\n", t.Token)

		^

cmd/admin_user_generate_access_token.go:76:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("Access token was successfully created: %s\n", t.Token)

		^

cmd/admin_user_must_change_password.go:56:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("Updated %d users setting MustChangePassword to %t\n", n, mustChangePassword)

	^

cmd/convert.go:44:3: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Println("Converted successfully, please confirm your database's character set is now utf8mb4")

		^

cmd/convert.go:50:3: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Println("Converted successfully, please confirm your database's all columns character is NVARCHAR now")

		^

cmd/convert.go:52:3: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Println("This command can only be used with a MySQL or MSSQL database")

		^

cmd/doctor.go:104:3: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Println(err)

		^

cmd/doctor.go:105:3: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Println("Check if you are using the right config file. You can use a --config directive to specify one.")

		^

cmd/doctor.go:243:3: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Println(err)

		^

cmd/embedded.go:154:3: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Println(a.path)

		^

cmd/embedded.go:198:3: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Println("Using app.ini at", setting.CustomConf)

		^

cmd/embedded.go:217:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("Extracting to %s:\n", destdir)

	^

cmd/embedded.go:253:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("%s already exists; skipped.\n", dest)

		^

cmd/embedded.go:275:2: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Println(dest)

	^

cmd/generate.go:63:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("%s", internalToken)

	^

cmd/generate.go:66:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("\n")

		^

cmd/generate.go:78:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("%s", JWTSecretBase64)

	^

cmd/generate.go:81:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("\n")

		^

cmd/generate.go:93:2: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Printf("%s", secretKey)

	^

cmd/generate.go:96:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("\n")

		^

cmd/keys.go:74:2: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	fmt.Println(strings.TrimSpace(authorizedString))

	^

cmd/mailer.go:32:4: use of `fmt.Print` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

			fmt.Print("warning: Content is empty")

			^

cmd/mailer.go:35:3: use of `fmt.Print` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Print("Proceed with sending email? [Y/n] ")

		^

cmd/mailer.go:40:4: use of `fmt.Println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

			fmt.Println("The mail was not sent")

			^

cmd/mailer.go:49:9: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

	_, _ = fmt.Printf("Sent %s email(s) to all users\n", respText)

	       ^

cmd/serv.go:147:3: use of `println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		println("Gitea: SSH has been disabled")

		^

cmd/serv.go:153:4: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

			fmt.Printf("error showing subcommand help: %v\n", err)

			^

cmd/serv.go:175:4: use of `println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

			println("Hi there! You've successfully authenticated with the deploy key named " + key.Name + ", but Gitea does not provide shell access.")

			^

cmd/serv.go:177:4: use of `println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

			println("Hi there! You've successfully authenticated with the principal " + key.Content + ", but Gitea does not provide shell access.")

			^

cmd/serv.go:179:4: use of `println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

			println("Hi there, " + user.Name + "! You've successfully authenticated with the key named " + key.Name + ", but Gitea does not provide shell access.")

			^

cmd/serv.go:181:3: use of `println` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		println("If this is unexpected, please log in with password and setup Gitea under another user.")

		^

cmd/serv.go:196:5: use of `fmt.Print` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

				fmt.Print(`{"type":"gitea","version":1}`)

				^

tests/e2e/e2e_test.go:54:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("Error initializing test database: %v\n", err)

		^

tests/e2e/e2e_test.go:63:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("util.RemoveAll: %v\n", err)

		^

tests/e2e/e2e_test.go:67:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("Unable to remove repo indexer: %v\n", err)

		^

tests/e2e/e2e_test.go:109:6: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

					fmt.Printf("%v", stdout.String())

					^

tests/e2e/e2e_test.go:110:6: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

					fmt.Printf("%v", stderr.String())

					^

tests/e2e/e2e_test.go:113:6: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

					fmt.Printf("%v", stdout.String())

					^

tests/integration/integration_test.go:124:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("Error initializing test database: %v\n", err)

		^

tests/integration/integration_test.go:135:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("util.RemoveAll: %v\n", err)

		^

tests/integration/integration_test.go:139:3: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

		fmt.Printf("Unable to remove repo indexer: %v\n", err)

		^

tests/integration/repo_test.go:357:4: use of `fmt.Printf` forbidden by pattern `^(fmt\.Print(|f|ln)|print|println)$` (forbidigo)

			fmt.Printf("%s", resp.Body)

			^
```

</details>

---------

Co-authored-by: Giteabot <teabot@gitea.io>
2023-04-24 05:50:58 -04:00

460 lines
10 KiB
Go

// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package log
import (
"context"
"fmt"
"runtime/pprof"
"sync"
"time"
"code.gitea.io/gitea/modules/process"
)
// Event represents a logging event
type Event struct {
level Level
msg string
caller string
filename string
line int
time time.Time
stacktrace string
}
// EventLogger represents the behaviours of a logger
type EventLogger interface {
LogEvent(event *Event) error
Close()
Flush()
GetLevel() Level
GetStacktraceLevel() Level
GetName() string
ReleaseReopen() error
}
// ChannelledLog represents a cached channel to a LoggerProvider
type ChannelledLog struct {
ctx context.Context
finished context.CancelFunc
name string
provider string
queue chan *Event
loggerProvider LoggerProvider
flush chan bool
close chan bool
closed chan bool
}
// NewChannelledLog a new logger instance with given logger provider and config.
func NewChannelledLog(parent context.Context, name, provider, config string, bufferLength int64) (*ChannelledLog, error) {
if log, ok := providers[provider]; ok {
l := &ChannelledLog{
queue: make(chan *Event, bufferLength),
flush: make(chan bool),
close: make(chan bool),
closed: make(chan bool),
}
l.loggerProvider = log()
if err := l.loggerProvider.Init(config); err != nil {
return nil, err
}
l.name = name
l.provider = provider
l.ctx, _, l.finished = process.GetManager().AddTypedContext(parent, fmt.Sprintf("Logger: %s(%s)", l.name, l.provider), process.SystemProcessType, false)
go l.Start()
return l, nil
}
return nil, ErrUnknownProvider{provider}
}
// Start processing the ChannelledLog
func (l *ChannelledLog) Start() {
pprof.SetGoroutineLabels(l.ctx)
defer l.finished()
for {
select {
case event, ok := <-l.queue:
if !ok {
l.closeLogger()
return
}
l.loggerProvider.LogEvent(event) //nolint:errcheck
case _, ok := <-l.flush:
if !ok {
l.closeLogger()
return
}
l.emptyQueue()
l.loggerProvider.Flush()
case <-l.close:
l.emptyQueue()
l.closeLogger()
return
}
}
}
// LogEvent logs an event to this ChannelledLog
func (l *ChannelledLog) LogEvent(event *Event) error {
select {
case l.queue <- event:
return nil
case <-time.After(60 * time.Second):
// We're blocked!
return ErrTimeout{
Name: l.name,
Provider: l.provider,
}
}
}
func (l *ChannelledLog) emptyQueue() bool {
for {
select {
case event, ok := <-l.queue:
if !ok {
return false
}
l.loggerProvider.LogEvent(event) //nolint:errcheck
default:
return true
}
}
}
func (l *ChannelledLog) closeLogger() {
l.loggerProvider.Flush()
l.loggerProvider.Close()
l.closed <- true
}
// Close this ChannelledLog
func (l *ChannelledLog) Close() {
l.close <- true
<-l.closed
}
// Flush this ChannelledLog
func (l *ChannelledLog) Flush() {
l.flush <- true
}
// ReleaseReopen this ChannelledLog
func (l *ChannelledLog) ReleaseReopen() error {
return l.loggerProvider.ReleaseReopen()
}
// GetLevel gets the level of this ChannelledLog
func (l *ChannelledLog) GetLevel() Level {
return l.loggerProvider.GetLevel()
}
// GetStacktraceLevel gets the level of this ChannelledLog
func (l *ChannelledLog) GetStacktraceLevel() Level {
return l.loggerProvider.GetStacktraceLevel()
}
// GetName returns the name of this ChannelledLog
func (l *ChannelledLog) GetName() string {
return l.name
}
// MultiChannelledLog represents a cached channel to a LoggerProvider
type MultiChannelledLog struct {
ctx context.Context
finished context.CancelFunc
name string
bufferLength int64
queue chan *Event
rwmutex sync.RWMutex
loggers map[string]EventLogger
flush chan bool
close chan bool
started bool
level Level
stacktraceLevel Level
closed chan bool
paused chan bool
}
// NewMultiChannelledLog a new logger instance with given logger provider and config.
func NewMultiChannelledLog(name string, bufferLength int64) *MultiChannelledLog {
ctx, _, finished := process.GetManager().AddTypedContext(context.Background(), fmt.Sprintf("Logger: %s", name), process.SystemProcessType, false)
m := &MultiChannelledLog{
ctx: ctx,
finished: finished,
name: name,
queue: make(chan *Event, bufferLength),
flush: make(chan bool),
bufferLength: bufferLength,
loggers: make(map[string]EventLogger),
level: NONE,
stacktraceLevel: NONE,
close: make(chan bool),
closed: make(chan bool),
paused: make(chan bool),
}
return m
}
// AddLogger adds a logger to this MultiChannelledLog
func (m *MultiChannelledLog) AddLogger(logger EventLogger) error {
m.rwmutex.Lock()
name := logger.GetName()
if _, has := m.loggers[name]; has {
m.rwmutex.Unlock()
return ErrDuplicateName{name}
}
m.loggers[name] = logger
if logger.GetLevel() < m.level {
m.level = logger.GetLevel()
}
if logger.GetStacktraceLevel() < m.stacktraceLevel {
m.stacktraceLevel = logger.GetStacktraceLevel()
}
m.rwmutex.Unlock()
go m.Start()
return nil
}
// DelLogger removes a sub logger from this MultiChannelledLog
// NB: If you delete the last sublogger this logger will simply drop
// log events
func (m *MultiChannelledLog) DelLogger(name string) bool {
m.rwmutex.Lock()
logger, has := m.loggers[name]
if !has {
m.rwmutex.Unlock()
return false
}
delete(m.loggers, name)
m.internalResetLevel()
m.rwmutex.Unlock()
logger.Flush()
logger.Close()
return true
}
// GetEventLogger returns a sub logger from this MultiChannelledLog
func (m *MultiChannelledLog) GetEventLogger(name string) EventLogger {
m.rwmutex.RLock()
defer m.rwmutex.RUnlock()
return m.loggers[name]
}
// GetEventLoggerNames returns a list of names
func (m *MultiChannelledLog) GetEventLoggerNames() []string {
m.rwmutex.RLock()
defer m.rwmutex.RUnlock()
var keys []string
for k := range m.loggers {
keys = append(keys, k)
}
return keys
}
func (m *MultiChannelledLog) closeLoggers() {
m.rwmutex.Lock()
for _, logger := range m.loggers {
logger.Flush()
logger.Close()
}
m.rwmutex.Unlock()
m.closed <- true
}
// Pause pauses this Logger
func (m *MultiChannelledLog) Pause() {
m.paused <- true
}
// Resume resumes this Logger
func (m *MultiChannelledLog) Resume() {
m.paused <- false
}
// ReleaseReopen causes this logger to tell its subloggers to release and reopen
func (m *MultiChannelledLog) ReleaseReopen() error {
m.rwmutex.Lock()
defer m.rwmutex.Unlock()
var accumulatedErr error
for _, logger := range m.loggers {
if err := logger.ReleaseReopen(); err != nil {
if accumulatedErr == nil {
accumulatedErr = fmt.Errorf("Error whilst reopening: %s Error: %w", logger.GetName(), err)
} else {
accumulatedErr = fmt.Errorf("Error whilst reopening: %s Error: %v & %w", logger.GetName(), err, accumulatedErr)
}
}
}
return accumulatedErr
}
// Start processing the MultiChannelledLog
func (m *MultiChannelledLog) Start() {
m.rwmutex.Lock()
if m.started {
m.rwmutex.Unlock()
return
}
pprof.SetGoroutineLabels(m.ctx)
defer m.finished()
m.started = true
m.rwmutex.Unlock()
paused := false
for {
if paused {
select {
case paused = <-m.paused:
if !paused {
m.ResetLevel()
}
case _, ok := <-m.flush:
if !ok {
m.closeLoggers()
return
}
m.rwmutex.RLock()
for _, logger := range m.loggers {
logger.Flush()
}
m.rwmutex.RUnlock()
case <-m.close:
m.closeLoggers()
return
}
continue
}
select {
case paused = <-m.paused:
if paused && m.level < INFO {
m.level = INFO
}
case event, ok := <-m.queue:
if !ok {
m.closeLoggers()
return
}
m.rwmutex.RLock()
for _, logger := range m.loggers {
err := logger.LogEvent(event)
if err != nil {
fmt.Println(err) //nolint:forbidigo
}
}
m.rwmutex.RUnlock()
case _, ok := <-m.flush:
if !ok {
m.closeLoggers()
return
}
m.emptyQueue()
m.rwmutex.RLock()
for _, logger := range m.loggers {
logger.Flush()
}
m.rwmutex.RUnlock()
case <-m.close:
m.emptyQueue()
m.closeLoggers()
return
}
}
}
func (m *MultiChannelledLog) emptyQueue() bool {
for {
select {
case event, ok := <-m.queue:
if !ok {
return false
}
m.rwmutex.RLock()
for _, logger := range m.loggers {
err := logger.LogEvent(event)
if err != nil {
fmt.Println(err) //nolint:forbidigo
}
}
m.rwmutex.RUnlock()
default:
return true
}
}
}
// LogEvent logs an event to this MultiChannelledLog
func (m *MultiChannelledLog) LogEvent(event *Event) error {
select {
case m.queue <- event:
return nil
case <-time.After(100 * time.Millisecond):
// We're blocked!
return ErrTimeout{
Name: m.name,
Provider: "MultiChannelledLog",
}
}
}
// Close this MultiChannelledLog
func (m *MultiChannelledLog) Close() {
m.close <- true
<-m.closed
}
// Flush this ChannelledLog
func (m *MultiChannelledLog) Flush() {
m.flush <- true
}
// GetLevel gets the level of this MultiChannelledLog
func (m *MultiChannelledLog) GetLevel() Level {
m.rwmutex.RLock()
defer m.rwmutex.RUnlock()
return m.level
}
// GetStacktraceLevel gets the level of this MultiChannelledLog
func (m *MultiChannelledLog) GetStacktraceLevel() Level {
m.rwmutex.RLock()
defer m.rwmutex.RUnlock()
return m.stacktraceLevel
}
func (m *MultiChannelledLog) internalResetLevel() Level {
m.level = NONE
for _, logger := range m.loggers {
level := logger.GetLevel()
if level < m.level {
m.level = level
}
level = logger.GetStacktraceLevel()
if level < m.stacktraceLevel {
m.stacktraceLevel = level
}
}
return m.level
}
// ResetLevel will reset the level of this MultiChannelledLog
func (m *MultiChannelledLog) ResetLevel() Level {
m.rwmutex.Lock()
defer m.rwmutex.Unlock()
return m.internalResetLevel()
}
// GetName gets the name of this MultiChannelledLog
func (m *MultiChannelledLog) GetName() string {
return m.name
}
func (e *Event) GetMsg() string {
return e.msg
}