-import Configuration from '../utils/Configuration';
-import Constants from '../utils/Constants';
-import { Worker } from 'worker_threads';
import WorkerData from '../types/WorkerData';
-import WorkerPool from './WorkerPool';
-export default class Wrk {
- private workerScript: string;
- private workerData: WorkerData;
- private worker: Worker;
- private maxWorkerElements: number;
- private numWorkerElements: number;
+export default abstract class Wrk {
+ protected workerScript: string;
+ public abstract size: number;
/**
* Create a new `Wrk`.
*
* @param {string} workerScript
- * @param {WorkerData} workerData
- * @param {number} maxWorkerElements
*/
- constructor(workerScript: string, workerData: WorkerData, maxWorkerElements = 1) {
- this.workerData = workerData;
+ constructor(workerScript: string) {
this.workerScript = workerScript;
- if (Configuration.useWorkerPool()) {
- WorkerPool.maxConcurrentWorkers = Configuration.getWorkerPoolMaxSize();
- } else {
- this.maxWorkerElements = maxWorkerElements;
- this.numWorkerElements = 0;
- }
}
- /**
- *
- * @return {Promise}
- * @public
- */
- async start(): Promise<Worker> {
- if (Configuration.useWorkerPool()) {
- await this.startWorkerPool();
- } else {
- await this.startWorker();
- }
- return this.worker;
- }
-
- /**
- *
- * @return {void}
- * @public
- */
- addWorkerElement(workerData: WorkerData): void {
- if (Configuration.useWorkerPool()) {
- throw Error('Cannot add Wrk element if the worker pool is enabled');
- }
- if (this.numWorkerElements >= this.maxWorkerElements) {
- throw Error('Cannot add Wrk element: max number of elements per worker reached');
- }
- this.workerData = workerData;
- this.worker.postMessage({ id: Constants.START_WORKER_ELEMENT, workerData: workerData });
- this.numWorkerElements++;
- }
-
- /**
- *
- * @return {number}
- * @public
- */
- public getWorkerPoolSize(): number {
- if (Configuration.useWorkerPool()) {
- return WorkerPool.getPoolSize();
- }
- }
-
- /**
- *
- * @return {Promise}
- * @private
- */
- private async startWorkerPool() {
- 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.numWorkerElements++;
- this.worker = worker;
- });
- }
+ public abstract start(): Promise<void>;
+ public abstract addElement(elementData: WorkerData): void;
}