| 1 | import type EventEmitterAsyncResource from 'node:events'; |
| 2 | import type { Worker } from 'node:worker_threads'; |
| 3 | |
| 4 | import { type ErrorHandler, type ExitHandler, FixedThreadPool } from 'poolifier'; |
| 5 | |
| 6 | import { WorkerAbstract } from './WorkerAbstract'; |
| 7 | import type { WorkerData, WorkerOptions } from './WorkerTypes'; |
| 8 | import { defaultErrorHandler, defaultExitHandler, sleep } from './WorkerUtils'; |
| 9 | |
| 10 | export class WorkerStaticPool extends WorkerAbstract<WorkerData> { |
| 11 | private readonly pool: FixedThreadPool<WorkerData>; |
| 12 | |
| 13 | /** |
| 14 | * Create a new `WorkerStaticPool`. |
| 15 | * |
| 16 | * @param workerScript - |
| 17 | * @param workerOptions - |
| 18 | */ |
| 19 | constructor(workerScript: string, workerOptions?: WorkerOptions) { |
| 20 | super(workerScript, workerOptions); |
| 21 | this.workerOptions.poolOptions.errorHandler = ( |
| 22 | this.workerOptions?.poolOptions?.errorHandler ?? defaultErrorHandler |
| 23 | ).bind(this) as ErrorHandler<Worker>; |
| 24 | this.workerOptions.poolOptions.exitHandler = ( |
| 25 | this.workerOptions?.poolOptions?.exitHandler ?? defaultExitHandler |
| 26 | ).bind(this) as ExitHandler<Worker>; |
| 27 | this.workerOptions.poolOptions.messageHandler.bind(this); |
| 28 | this.pool = new FixedThreadPool( |
| 29 | this.workerOptions.poolMaxSize, |
| 30 | this.workerScript, |
| 31 | this.workerOptions.poolOptions |
| 32 | ); |
| 33 | } |
| 34 | |
| 35 | get size(): number { |
| 36 | return this.pool.workerNodes.length; |
| 37 | } |
| 38 | |
| 39 | get maxElementsPerWorker(): number | undefined { |
| 40 | return undefined; |
| 41 | } |
| 42 | |
| 43 | get emitter(): EventEmitterAsyncResource | undefined { |
| 44 | return this.pool?.emitter; |
| 45 | } |
| 46 | |
| 47 | /** @inheritDoc */ |
| 48 | public async start(): Promise<void> { |
| 49 | // This is intentional |
| 50 | } |
| 51 | |
| 52 | /** @inheritDoc */ |
| 53 | public async stop(): Promise<void> { |
| 54 | return this.pool.destroy(); |
| 55 | } |
| 56 | |
| 57 | /** @inheritDoc */ |
| 58 | public async addElement(elementData: WorkerData): Promise<void> { |
| 59 | await this.pool.execute(elementData); |
| 60 | // Start element sequentially to optimize memory at startup |
| 61 | this.workerOptions.elementStartDelay > 0 && (await sleep(this.workerOptions.elementStartDelay)); |
| 62 | } |
| 63 | } |