-import { WorkerEvents, WorkerSetElement } from '../types/Worker';
+// Partial Copyright Jerome Benoit. 2021. All Rights Reserved.
+
+import { WorkerMessageEvents, WorkerOptions, WorkerSetElement } from '../types/Worker';
import Utils from '../utils/Utils';
import { Worker } from 'worker_threads';
import WorkerAbstract from './WorkerAbstract';
+import { WorkerUtils } from './WorkerUtils';
export default class WorkerSet<T> extends WorkerAbstract {
- public maxElementsPerWorker: number;
+ public readonly maxElementsPerWorker: number;
+ private readonly messageHandler: (message: unknown) => void | Promise<void>;
private workerSet: Set<WorkerSetElement>;
/**
* Create a new `WorkerSet`.
*
- * @param {string} workerScript
- * @param {number} maxElementsPerWorker
- * @param {number} workerStartDelay
+ * @param workerScript
+ * @param maxElementsPerWorker
+ * @param workerStartDelay
+ * @param opts
*/
- constructor(workerScript: string, maxElementsPerWorker = 1, workerStartDelay?: number) {
+ constructor(workerScript: string, maxElementsPerWorker = 1, workerStartDelay?: number, opts?: WorkerOptions) {
super(workerScript, workerStartDelay);
- this.workerSet = new Set<WorkerSetElement>();
this.maxElementsPerWorker = maxElementsPerWorker;
+ this.messageHandler = opts?.messageHandler ?? (() => { /* This is intentional */ });
+ this.workerSet = new Set<WorkerSetElement>();
}
get size(): number {
/**
*
- * @param {T} elementData
- * @returns {Promise<void>}
+ * @param elementData
+ * @returns
* @public
*/
public async addElement(elementData: T): Promise<void> {
// Start worker sequentially to optimize memory at startup
await Utils.sleep(this.workerStartDelay);
}
- this.getLastWorker().postMessage({ id: WorkerEvents.START_WORKER_ELEMENT, workerData: elementData });
+ this.getLastWorker().postMessage({ id: WorkerMessageEvents.START_WORKER_ELEMENT, data: elementData });
this.getLastWorkerSetElement().numberOfWorkerElements++;
}
/**
*
- * @returns {Promise<void>}
+ * @returns
* @public
*/
public async start(): Promise<void> {
/**
*
- * @returns {Promise<void>}
+ * @returns
* @public
*/
public async stop(): Promise<void> {
*/
private startWorker(): void {
const worker = new Worker(this.workerScript);
- worker.on('message', () => { });
- worker.on('error', () => { });
+ worker.on('message', (msg) => {
+ (async () => {
+ await this.messageHandler(msg);
+ })().catch(() => { /* This is intentional */ });
+ });
+ worker.on('error', () => { /* This is intentional */ });
worker.on('exit', (code) => {
- if (code !== 0) {
- console.error(`Worker stopped with exit code ${code}`);
- }
+ WorkerUtils.defaultExitHandler(code);
this.workerSet.delete(this.getWorkerSetElementByWorker(worker));
});
this.workerSet.add({ worker, numberOfWorkerElements: 0 });
private getLastWorkerSetElement(): WorkerSetElement {
let workerSetElement: WorkerSetElement;
- // eslint-disable-next-line no-empty
- for (workerSetElement of this.workerSet) { }
+ for (workerSetElement of this.workerSet) { /* This is intentional */ }
return workerSetElement;
}
private getWorkerSetElementByWorker(worker: Worker): WorkerSetElement {
let workerSetElt: WorkerSetElement;
- this.workerSet.forEach((workerSetElement) => {
+ for (const workerSetElement of this.workerSet) {
if (workerSetElement.worker.threadId === worker.threadId) {
workerSetElt = workerSetElement;
+ break;
}
- });
+ }
return workerSetElt;
}
}