1 import { DynamicThreadPool
, PoolOptions
} from
'poolifier';
3 import Constants from
'../utils/Constants';
4 import Utils from
'../utils/Utils';
5 import { Worker
} from
'worker_threads';
6 import { WorkerData
} from
'../types/Worker';
7 import Wrk from
'./Wrk';
9 export default class WorkerDynamicPool
<T
> extends Wrk
{
10 private pool
: DynamicPool
;
13 * Create a new `WorkerDynamicPool`.
15 * @param {string} workerScript
17 constructor(workerScript
: string, min
: number, max
: number,) {
19 this.pool
= DynamicPool
.getInstance(min
, max
, this.workerScript
);
23 return this.pool
.workers
.length
;
26 get
maxElementsPerWorker(): number {
32 * @return {Promise<void>}
35 // eslint-disable-next-line @typescript-eslint/no-empty-function
36 public async start(): Promise
<void> { }
40 * @return {Promise<void>}
43 public async stop(): Promise
<void> {
44 return this.pool
.destroy();
49 * @return {Promise<void>}
52 public async addElement(elementData
: T
): Promise
<void> {
53 await this.pool
.execute(elementData
);
54 // Start worker sequentially to optimize memory at startup
55 await Utils
.sleep(Constants
.START_WORKER_DELAY
);
59 class DynamicPool
extends DynamicThreadPool
<WorkerData
> {
60 private static instance
: DynamicPool
;
62 private constructor(min
: number, max
: number, filename
: string, opts
?: PoolOptions
<Worker
>) {
63 super(min
, max
, filename
, opts
);
66 public static getInstance(min
: number, max
: number, filename
: string): DynamicPool
{
67 if (!DynamicPool
.instance
) {
68 DynamicPool
.instance
= new DynamicPool(min
, max
, filename
,
70 exitHandler
: (code
) => {
72 console
.error(`Worker stopped with exit code ${code}`);
78 return DynamicPool
.instance
;