| 1 | import { FixedThreadPool, FixedThreadPoolOptions } from 'poolifier'; |
| 2 | |
| 3 | import Constants from '../utils/Constants'; |
| 4 | import Utils from '../utils/Utils'; |
| 5 | import { WorkerData } from '../types/Worker'; |
| 6 | import Wrk from './Wrk'; |
| 7 | |
| 8 | export default class WorkerStaticPool<T> extends Wrk { |
| 9 | private pool: StaticPool; |
| 10 | |
| 11 | /** |
| 12 | * Create a new `WorkerStaticPool`. |
| 13 | * |
| 14 | * @param {string} workerScript |
| 15 | */ |
| 16 | constructor(workerScript: string, numThreads: number) { |
| 17 | super(workerScript); |
| 18 | this.pool = StaticPool.getInstance(numThreads, this.workerScript); |
| 19 | } |
| 20 | |
| 21 | get size(): number { |
| 22 | return this.pool.workers.length; |
| 23 | } |
| 24 | |
| 25 | get maxElementsPerWorker(): number { |
| 26 | return 1; |
| 27 | } |
| 28 | |
| 29 | /** |
| 30 | * |
| 31 | * @return {Promise<void>} |
| 32 | * @public |
| 33 | */ |
| 34 | // eslint-disable-next-line @typescript-eslint/no-empty-function |
| 35 | public async start(): Promise<void> { } |
| 36 | |
| 37 | /** |
| 38 | * |
| 39 | * @return {Promise<void>} |
| 40 | * @public |
| 41 | */ |
| 42 | public async stop(): Promise<void> { |
| 43 | return this.pool.destroy(); |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * |
| 48 | * @return {Promise<void>} |
| 49 | * @public |
| 50 | */ |
| 51 | public async addElement(elementData: T): Promise<void> { |
| 52 | await this.pool.execute(elementData); |
| 53 | // Start worker sequentially to optimize memory at startup |
| 54 | await Utils.sleep(Constants.START_WORKER_DELAY); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | class StaticPool extends FixedThreadPool<WorkerData> { |
| 59 | private static instance: StaticPool; |
| 60 | |
| 61 | private constructor(numThreads: number, workerScript: string, opts?: FixedThreadPoolOptions) { |
| 62 | super(numThreads, workerScript, opts); |
| 63 | } |
| 64 | |
| 65 | public static getInstance(numThreads: number, workerScript: string): StaticPool { |
| 66 | if (!StaticPool.instance) { |
| 67 | StaticPool.instance = new StaticPool(numThreads, workerScript, |
| 68 | { |
| 69 | exitHandler: (code) => { |
| 70 | if (code !== 0) { |
| 71 | console.error(`Worker stopped with exit code ${code}`); |
| 72 | } |
| 73 | } |
| 74 | } |
| 75 | ); |
| 76 | } |
| 77 | return StaticPool.instance; |
| 78 | } |
| 79 | } |