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https://github.com/angular/angular
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94fa140888
The previous implementation mixed up the management of locking a piece of code (both sync and async) with the management of writing and removing the lockFile that is used as the flag for which process has locked the code. This change splits these two concepts up. Apart from avoiding the awkward base class it allows the `LockFile` implementation to be replaced cleanly. PR Close #35861
48 lines
1.6 KiB
TypeScript
48 lines
1.6 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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/// <reference types="node" />
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import * as cluster from 'cluster';
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import {Logger} from '../../logging/logger';
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import {PackageJsonUpdater} from '../../writing/package_json_updater';
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import {AnalyzeEntryPointsFn, CreateCompileFn, Executor} from '../api';
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import {AsyncLocker} from '../lock_file';
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import {ClusterMaster} from './master';
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import {ClusterWorker} from './worker';
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/**
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* An `Executor` that processes tasks in parallel (on multiple processes) and completes
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* asynchronously.
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*/
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export class ClusterExecutor implements Executor {
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constructor(
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private workerCount: number, private logger: Logger,
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private pkgJsonUpdater: PackageJsonUpdater, private lockFile: AsyncLocker) {}
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async execute(analyzeEntryPoints: AnalyzeEntryPointsFn, createCompileFn: CreateCompileFn):
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Promise<void> {
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if (cluster.isMaster) {
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// This process is the cluster master.
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return this.lockFile.lock(() => {
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this.logger.debug(
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`Running ngcc on ${this.constructor.name} (using ${this.workerCount} worker processes).`);
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const master = new ClusterMaster(
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this.workerCount, this.logger, this.pkgJsonUpdater, analyzeEntryPoints);
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return master.run();
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});
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} else {
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// This process is a cluster worker.
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const worker = new ClusterWorker(this.logger, createCompileFn);
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return worker.run();
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}
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}
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}
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