'use strict';
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Object.defineProperty(exports, '__esModule', {
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value: true
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});
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exports.default = void 0;
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function _os() {
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const data = require('os');
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_os = function () {
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return data;
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};
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return data;
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}
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var _WorkerPool = _interopRequireDefault(require('./WorkerPool'));
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var _Farm = _interopRequireDefault(require('./Farm'));
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function _interopRequireDefault(obj) {
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return obj && obj.__esModule ? obj : {default: obj};
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}
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function _defineProperty(obj, key, value) {
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if (key in obj) {
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Object.defineProperty(obj, key, {
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value: value,
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enumerable: true,
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configurable: true,
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writable: true
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});
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} else {
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obj[key] = value;
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}
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return obj;
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}
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function getExposedMethods(workerPath, options) {
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let exposedMethods = options.exposedMethods; // If no methods list is given, try getting it by auto-requiring the module.
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if (!exposedMethods) {
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const module = require(workerPath);
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exposedMethods = Object.keys(module).filter(
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// @ts-ignore: no index
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name => typeof module[name] === 'function'
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);
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if (typeof module === 'function') {
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exposedMethods = [...exposedMethods, 'default'];
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}
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}
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return exposedMethods;
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}
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/**
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* The Jest farm (publicly called "Worker") is a class that allows you to queue
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* methods across multiple child processes, in order to parallelize work. This
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* is done by providing an absolute path to a module that will be loaded on each
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* of the child processes, and bridged to the main process.
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*
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* Bridged methods are specified by using the "exposedMethods" property of the
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* "options" object. This is an array of strings, where each of them corresponds
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* to the exported name in the loaded module.
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*
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* You can also control the amount of workers by using the "numWorkers" property
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* of the "options" object, and the settings passed to fork the process through
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* the "forkOptions" property. The amount of workers defaults to the amount of
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* CPUS minus one.
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*
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* Queueing calls can be done in two ways:
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* - Standard method: calls will be redirected to the first available worker,
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* so they will get executed as soon as they can.
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*
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* - Sticky method: if a "computeWorkerKey" method is provided within the
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* config, the resulting string of this method will be used as a key.
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* Every time this key is returned, it is guaranteed that your job will be
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* processed by the same worker. This is specially useful if your workers
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* are caching results.
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*/
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class JestWorker {
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constructor(workerPath, options) {
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_defineProperty(this, '_ending', void 0);
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_defineProperty(this, '_farm', void 0);
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_defineProperty(this, '_options', void 0);
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_defineProperty(this, '_workerPool', void 0);
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this._options = {...options};
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this._ending = false;
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const workerPoolOptions = {
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enableWorkerThreads: this._options.enableWorkerThreads || false,
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forkOptions: this._options.forkOptions || {},
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maxRetries: this._options.maxRetries || 3,
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numWorkers:
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this._options.numWorkers || Math.max((0, _os().cpus)().length - 1, 1),
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setupArgs: this._options.setupArgs || []
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};
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if (this._options.WorkerPool) {
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// @ts-ignore: constructor target any?
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this._workerPool = new this._options.WorkerPool(
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workerPath,
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workerPoolOptions
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);
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} else {
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this._workerPool = new _WorkerPool.default(workerPath, workerPoolOptions);
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}
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this._farm = new _Farm.default(
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workerPoolOptions.numWorkers,
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this._workerPool.send.bind(this._workerPool),
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this._options.computeWorkerKey
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);
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this._bindExposedWorkerMethods(workerPath, this._options);
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}
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_bindExposedWorkerMethods(workerPath, options) {
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getExposedMethods(workerPath, options).forEach(name => {
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if (name.startsWith('_')) {
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return;
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}
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if (this.constructor.prototype.hasOwnProperty(name)) {
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throw new TypeError('Cannot define a method called ' + name);
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} // @ts-ignore: dynamic extension of the class instance is expected.
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this[name] = this._callFunctionWithArgs.bind(this, name);
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});
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}
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_callFunctionWithArgs(method, ...args) {
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if (this._ending) {
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throw new Error('Farm is ended, no more calls can be done to it');
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}
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return this._farm.doWork(method, ...args);
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}
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getStderr() {
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return this._workerPool.getStderr();
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}
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getStdout() {
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return this._workerPool.getStdout();
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}
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async end() {
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if (this._ending) {
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throw new Error('Farm is ended, no more calls can be done to it');
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}
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this._ending = true;
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return this._workerPool.end();
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}
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}
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exports.default = JestWorker;
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