// Partial Copyright Jerome Benoit. 2021-2023. All Rights Reserved.
import EventEmitterAsyncResource from 'node:events';
-import { Worker } from 'node:worker_threads';
+import { SHARE_ENV, Worker } from 'node:worker_threads';
import { WorkerAbstract } from './WorkerAbstract';
import { WorkerConstants } from './WorkerConstants';
import {
- type MessageHandler,
type SetInfo,
type WorkerData,
WorkerMessageEvents,
type WorkerOptions,
type WorkerSetElement,
+ WorkerSetEvents,
} from './WorkerTypes';
-import { defaultErrorHandler, defaultExitHandler, sleep } from './WorkerUtils';
+import { sleep } from './WorkerUtils';
export class WorkerSet extends WorkerAbstract<WorkerData> {
public readonly emitter: EventEmitterAsyncResource;
private readonly workerSet: Set<WorkerSetElement>;
/**
- * Create a new `WorkerSet`.
+ * Creates a new `WorkerSet`.
*
* @param workerScript -
* @param workerOptions -
*/
constructor(workerScript: string, workerOptions?: WorkerOptions) {
super(workerScript, workerOptions);
+ this.workerOptions.poolOptions = {
+ ...{
+ enableEvents: true,
+ restartWorkerOnError: true,
+ },
+ ...this.workerOptions.poolOptions,
+ };
this.workerSet = new Set<WorkerSetElement>();
- this.emitter = new EventEmitterAsyncResource();
+ if (this.workerOptions?.poolOptions?.enableEvents) {
+ this.emitter = new EventEmitterAsyncResource();
+ }
}
get info(): SetInfo {
return {
+ version: WorkerConstants.version,
+ type: 'set',
+ worker: 'thread',
size: this.size,
- runningElements: [...this.workerSet].reduce(
+ elementsExecuting: [...this.workerSet].reduce(
(accumulator, workerSetElement) => accumulator + workerSetElement.numberOfWorkerElements,
0
),
return this.workerOptions.elementsPerWorker;
}
+ /** @inheritDoc */
+ public async start(): Promise<void> {
+ this.addWorkerSetElement();
+ // Add worker set element sequentially to optimize memory at startup
+ this.workerOptions.workerStartDelay > 0 && (await sleep(this.workerOptions.workerStartDelay));
+ }
+
+ /** @inheritDoc */
+ public async stop(): Promise<void> {
+ for (const workerSetElement of this.workerSet) {
+ await workerSetElement.worker.terminate();
+ }
+ this.workerSet.clear();
+ }
+
/** @inheritDoc */
public async addElement(elementData: WorkerData): Promise<void> {
if (!this.workerSet) {
}
}
- /** @inheritDoc */
- public async start(): Promise<void> {
- this.addWorkerSetElement();
- // Add worker set element sequentially to optimize memory at startup
- this.workerOptions.workerStartDelay > 0 && (await sleep(this.workerOptions.workerStartDelay));
- }
-
- /** @inheritDoc */
- public async stop(): Promise<void> {
- for (const workerSetElement of this.workerSet) {
- await workerSetElement.worker.terminate();
- }
- this.workerSet.clear();
- }
-
/**
- * Add a new `WorkerSetElement`.
+ * Adds a new `WorkerSetElement`.
*/
private addWorkerSetElement(): WorkerSetElement {
- const worker = new Worker(this.workerScript);
+ const worker = new Worker(this.workerScript, {
+ env: SHARE_ENV,
+ ...this.workerOptions.poolOptions.workerOptions,
+ });
worker.on(
'message',
- (this.workerOptions?.messageHandler ?? WorkerConstants.EMPTY_FUNCTION).bind(
- this
- ) as MessageHandler<Worker>
+ this.workerOptions?.poolOptions?.messageHandler ?? WorkerConstants.EMPTY_FUNCTION
+ );
+ worker.on(
+ 'error',
+ this.workerOptions?.poolOptions?.errorHandler ?? WorkerConstants.EMPTY_FUNCTION
);
- worker.on('error', defaultErrorHandler.bind(this) as (err: Error) => void);
worker.on('error', (error) => {
- this.emitter.emit('error', error);
- this.addWorkerSetElement();
+ if (this.emitter !== undefined) {
+ this.emitter.emit(WorkerSetEvents.error, error);
+ }
+ if (this.workerOptions?.poolOptions?.restartWorkerOnError) {
+ this.addWorkerSetElement();
+ }
});
- worker.on('exit', defaultExitHandler.bind(this) as (exitCode: number) => void);
- worker.on('exit', () => this.workerSet.delete(this.getWorkerSetElementByWorker(worker)));
+ worker.on(
+ 'online',
+ this.workerOptions?.poolOptions?.onlineHandler ?? WorkerConstants.EMPTY_FUNCTION
+ );
+ worker.on(
+ 'exit',
+ this.workerOptions?.poolOptions?.exitHandler ?? WorkerConstants.EMPTY_FUNCTION
+ );
+ worker.once('exit', () => this.workerSet.delete(this.getWorkerSetElementByWorker(worker)));
const workerSetElement: WorkerSetElement = { worker, numberOfWorkerElements: 0 };
this.workerSet.add(workerSetElement);
return workerSetElement;