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we actually don't need to track write requests

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as errors will bubble up to the txn
This commit is contained in:
Bruno Windels 2020-10-01 14:31:08 +02:00
parent d5a52c32d6
commit ddb14f48bf
2 changed files with 16 additions and 35 deletions
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20
src/matrix/storage/idb/Store.js
View file

@ -16,8 +16,6 @@ limitations under the License.
import {QueryTarget} from "./QueryTarget.js";
import {IDBRequestAttemptError} from "./error.js";
import {reqAsPromise} from "./utils.js";
import {StorageError} from "../common.js";
class QueryTargetWrapper {
constructor(qt) {
@ -120,14 +118,26 @@ export class Store extends QueryTarget {
}
put(value) {
this._transaction._addWriteRequest(this._idbStore.put(value));
// If this request fails, the error will bubble up to the transaction and abort it,
// which is the behaviour we want. Therefore, it is ok to not create a promise for this
// request and await it.
//
// Perhaps at some later point, we will want to handle an error (like ConstraintError) for
// individual write requests. In that case, we should add a method that returns a promise (e.g. putAndObserve)
// and call preventDefault on the event to prevent it from aborting the transaction
//
// Note that this can still throw synchronously, like it does for TransactionInactiveError,
// see https://www.w3.org/TR/IndexedDB-2/#transaction-lifetime-concept
this._idbStore.put(value);
}
add(value) {
this._transaction._addWriteRequest(this._idbStore.add(value));
// ok to not monitor result of request, see comment in `put`.
this._idbStore.add(value);
}
delete(keyOrKeyRange) {
this._transaction._addWriteRequest(this._idbStore.delete(keyOrKeyRange));
// ok to not monitor result of request, see comment in `put`.
this._idbStore.delete(keyOrKeyRange);
}
}

31
src/matrix/storage/idb/Transaction.js
View file

@ -14,7 +14,6 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {IDBRequestError} from "./error.js";
import {txnAsPromise} from "./utils.js";
import {StorageError} from "../common.js";
import {Store} from "./Store.js";
@ -39,14 +38,6 @@ export class Transaction {
this._txn = txn;
this._allowedStoreNames = allowedStoreNames;
this._stores = {};
this._writeRequests = null;
}
_addWriteRequest(request) {
if (!this._writeRequests) {
this._writeRequests = [];
}
this._writeRequests.push(request);
}
_idbStore(name) {
@ -126,27 +117,7 @@ export class Transaction {
}
async complete() {
// check the write requests if we haven't failed yet
if (this._writeRequests) {
for (const request of this._writeRequests) {
if (request.error) {
try {
this.abort();
} catch (err) {/* ignore abort error, although it would be useful to know if the other stuff got committed or not... */}
return Promise.reject(new IDBRequestError(request, "Write request failed"));
}
}
}
const result = await txnAsPromise(this._txn);
// check the write requests if we haven't failed yet
if (this._writeRequests) {
for (const request of this._writeRequests) {
if (request.readyState !== "done") {
return Promise.reject(new IDBRequestError(request, "Request is still pending after transaction finished"));
}
}
}
return result;
return txnAsPromise(this._txn);
}
abort() {