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Get most of the task worker code into place
Signed-off-by: Fredrik Adelöw <freben@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| /* | ||
| * Copyright 2021 The Backstage Authors | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| export class CancelToken { | ||
| // @ts-ignore: is actually assigned by the Promise constructor | ||
| #cancel: () => void; | ||
| #isCancelled: boolean; | ||
| #cancelPromise: Promise<void>; | ||
|
|
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| static create(): CancelToken { | ||
| return new CancelToken(); | ||
| } | ||
|
|
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| private constructor() { | ||
| this.#isCancelled = false; | ||
| this.#cancelPromise = new Promise(resolve => { | ||
| this.#cancel = () => { | ||
| this.#isCancelled = true; | ||
| resolve(); | ||
| }; | ||
| }); | ||
| } | ||
|
|
||
| cancel(): void { | ||
| this.#cancel(); | ||
| } | ||
|
|
||
| get isCancelled(): boolean { | ||
| return this.#isCancelled; | ||
| } | ||
|
|
||
| get promise(): Promise<void> { | ||
| return this.#cancelPromise; | ||
| } | ||
| } |
67 changes: 67 additions & 0 deletions
67
packages/backend-common/src/tasks/PluginTaskManagerImpl.test.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| /* | ||
| * Copyright 2021 The Backstage Authors | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| import { TestDatabases } from '@backstage/backend-test-utils'; | ||
| import { Duration } from 'luxon'; | ||
| import { migrateBackendCommon } from '../database/migrateBackendCommon'; | ||
| import { getVoidLogger } from '../logging'; | ||
| import { PluginTaskManagerImpl } from './PluginTaskManagerImpl'; | ||
|
|
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| describe('PluginTaskManagerImpl', () => { | ||
| const databases = TestDatabases.create({ | ||
| ids: ['POSTGRES_13', 'POSTGRES_9', 'SQLITE_3'], | ||
| }); | ||
|
|
||
| describe('locking', () => { | ||
| it.each(databases.eachSupportedId())( | ||
| 'can run the happy path, %p', | ||
| async databaseId => { | ||
| const knex = await databases.init(databaseId); | ||
| await migrateBackendCommon(knex); | ||
|
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| const manager = new PluginTaskManagerImpl( | ||
| async () => knex, | ||
| getVoidLogger(), | ||
| ); | ||
|
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| const lock1 = await manager.acquireLock('lock1', { | ||
| timeout: Duration.fromMillis(5000), | ||
| }); | ||
| const lock2 = await manager.acquireLock('lock2', { | ||
| timeout: Duration.fromMillis(5000), | ||
| }); | ||
|
|
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| expect(lock1.acquired).toBe(true); | ||
| expect(lock2.acquired).toBe(true); | ||
|
|
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| await expect( | ||
| manager.acquireLock('lock1', { | ||
| timeout: Duration.fromMillis(5000), | ||
| }), | ||
| ).resolves.toEqual({ acquired: false }); | ||
|
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| await (lock1 as any).release(); | ||
| await (lock2 as any).release(); | ||
|
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| const lock1Again = await manager.acquireLock('lock1', { | ||
| timeout: Duration.fromMillis(5000), | ||
| }); | ||
| expect(lock1Again.acquired).toBe(true); | ||
| await (lock1Again as any).release(); | ||
| }, | ||
| ); | ||
| }); | ||
| }); |
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