-import { Worker, WorkerOptions } from 'worker_threads';
-
-import Configuration from '../utils/Configuration';
-import Constants from '../utils/Constants';
-import Pool from 'worker-threads-pool';
import WorkerData from '../types/WorkerData';
-export default class Wrk {
- private _workerScript: string;
- private _workerData: WorkerData;
- private _worker: Worker;
+export default abstract class Wrk {
+ protected workerScript: string;
+ public abstract size: number;
/**
* Create a new `Wrk`.
*
* @param {string} workerScript
- * @param {WorkerData} workerData
- */
- constructor(workerScript: string, workerData: WorkerData) {
- this._workerData = workerData;
- this._workerScript = workerScript;
- if (Configuration.useWorkerPool()) {
- WorkerPool.maxConcurrentWorkers = Configuration.getWorkerPoolMaxSize();
- }
- }
-
- /**
- *
- * @return {Promise}
- * @public
- */
- async start(): Promise<Worker> {
- if (Configuration.useWorkerPool()) {
- await this._startWorkerWithPool();
- } else {
- await this._startWorker();
- }
- return this._worker;
- }
-
- /**
- *
- * @return {void}
- * @public
*/
- addWorkerElement(workerData: WorkerData): void {
- // FIXME: also forbid to add an element if the current number of elements > max number of elements
- if (Configuration.useWorkerPool()) {
- return;
- }
- this._workerData = workerData;
- this._worker.postMessage({ id: Constants.START_WORKER_ELEMENT, workerData: workerData });
+ constructor(workerScript: string) {
+ this.workerScript = workerScript;
}
- /**
- *
- * @return {number}
- * @public
- */
- public getWorkerPoolSize(): number {
- if (Configuration.useWorkerPool()) {
- return WorkerPool.getPoolSize();
- }
- }
-
- /**
- *
- * @return {Promise}
- * @private
- */
- private async _startWorkerWithPool() {
- return new Promise((resolve, reject) => {
- WorkerPool.acquire(this._workerScript, { workerData: this._workerData }, (err, worker) => {
- if (err) {
- return reject(err);
- }
- worker.once('message', resolve);
- worker.once('error', reject);
- this._worker = worker;
- });
- });
- }
-
- /**
- *
- * @return {Promise}
- * @private
- */
- private async _startWorker() {
- return new Promise((resolve, reject) => {
- const worker = new Worker(this._workerScript, { workerData: this._workerData });
- worker.on('message', resolve);
- worker.on('error', reject);
- worker.on('exit', (code) => {
- if (code !== 0) {
- reject(new Error(`Worker stopped with exit code ${code}`));
- }
- });
- this._worker = worker;
- });
- }
-}
-
-
-class WorkerPool {
- public static maxConcurrentWorkers: number;
- private static _instance: Pool;
-
- private constructor() { }
-
- public static getInstance(): Pool {
- if (!WorkerPool._instance) {
- WorkerPool._instance = new Pool({ max: WorkerPool.maxConcurrentWorkers });
- }
- return WorkerPool._instance;
- }
-
- public static acquire(filename: string, options: WorkerOptions, callback: (error: Error | null, worker: Worker) => void): void {
- WorkerPool.getInstance().acquire(filename, options, callback);
- }
-
- public static getPoolSize(): number {
- return WorkerPool.getInstance().size;
- }
+ public abstract start(): Promise<void>;
+ public abstract addElement(elementData: WorkerData): void;
}