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c32882b0 | 1 | import { FixedThreadPool, PoolOptions } from 'poolifier'; |
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2 | |
3 | import Constants from '../utils/Constants'; | |
4 | import Utils from '../utils/Utils'; | |
c32882b0 | 5 | import { Worker } from 'worker_threads'; |
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6 | import { WorkerData } from '../types/Worker'; |
7 | import Wrk from './Wrk'; | |
a4624c96 | 8 | |
8434025b | 9 | export default class WorkerStaticPool<T> extends Wrk { |
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10 | private pool: StaticPool; |
11 | ||
12 | /** | |
13 | * Create a new `WorkerStaticPool`. | |
14 | * | |
15 | * @param {string} workerScript | |
16 | */ | |
63b19acd | 17 | constructor(workerScript: string, numberOfThreads: number) { |
a4624c96 | 18 | super(workerScript); |
63b19acd | 19 | this.pool = StaticPool.getInstance(numberOfThreads, this.workerScript); |
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20 | } |
21 | ||
22 | get size(): number { | |
23 | return this.pool.workers.length; | |
24 | } | |
25 | ||
26 | get maxElementsPerWorker(): number { | |
27 | return 1; | |
28 | } | |
29 | ||
30 | /** | |
31 | * | |
32 | * @return {Promise<void>} | |
33 | * @public | |
34 | */ | |
35 | // eslint-disable-next-line @typescript-eslint/no-empty-function | |
36 | public async start(): Promise<void> { } | |
37 | ||
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38 | /** |
39 | * | |
40 | * @return {Promise<void>} | |
41 | * @public | |
42 | */ | |
43 | public async stop(): Promise<void> { | |
44 | return this.pool.destroy(); | |
45 | } | |
46 | ||
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47 | /** |
48 | * | |
49 | * @return {Promise<void>} | |
50 | * @public | |
51 | */ | |
8434025b | 52 | public async addElement(elementData: T): Promise<void> { |
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53 | await this.pool.execute(elementData); |
54 | // Start worker sequentially to optimize memory at startup | |
55 | await Utils.sleep(Constants.START_WORKER_DELAY); | |
56 | } | |
57 | } | |
58 | ||
59 | class StaticPool extends FixedThreadPool<WorkerData> { | |
60 | private static instance: StaticPool; | |
61 | ||
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62 | private constructor(numberOfThreads: number, workerScript: string, opts?: PoolOptions<Worker>) { |
63 | super(numberOfThreads, workerScript, opts); | |
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64 | } |
65 | ||
63b19acd | 66 | public static getInstance(numberOfThreads: number, workerScript: string): StaticPool { |
a4624c96 | 67 | if (!StaticPool.instance) { |
63b19acd | 68 | StaticPool.instance = new StaticPool(numberOfThreads, workerScript, |
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69 | { |
70 | exitHandler: (code) => { | |
71 | if (code !== 0) { | |
1e924543 | 72 | console.error(`Worker stopped with exit code ${code}`); |
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73 | } |
74 | } | |
75 | } | |
76 | ); | |
77 | } | |
78 | return StaticPool.instance; | |
79 | } | |
80 | } |