| 1 | import { isMainThread } from 'node:worker_threads'; |
| 2 | |
| 3 | import type { WorkerAbstract } from './WorkerAbstract'; |
| 4 | import { WorkerConstants } from './WorkerConstants'; |
| 5 | import { WorkerDynamicPool } from './WorkerDynamicPool'; |
| 6 | import { WorkerSet } from './WorkerSet'; |
| 7 | import { WorkerStaticPool } from './WorkerStaticPool'; |
| 8 | import { type WorkerData, type WorkerOptions, WorkerProcessType } from './WorkerTypes'; |
| 9 | |
| 10 | const DEFAULT_WORKER_OPTIONS: WorkerOptions = { |
| 11 | workerStartDelay: WorkerConstants.DEFAULT_WORKER_START_DELAY, |
| 12 | elementStartDelay: WorkerConstants.DEFAULT_ELEMENT_START_DELAY, |
| 13 | poolMinSize: WorkerConstants.DEFAULT_POOL_MIN_SIZE, |
| 14 | poolMaxSize: WorkerConstants.DEFAULT_POOL_MAX_SIZE, |
| 15 | elementsPerWorker: WorkerConstants.DEFAULT_ELEMENTS_PER_WORKER, |
| 16 | poolOptions: {}, |
| 17 | }; |
| 18 | |
| 19 | export class WorkerFactory { |
| 20 | private constructor() { |
| 21 | // This is intentional |
| 22 | } |
| 23 | |
| 24 | public static getWorkerImplementation<T extends WorkerData>( |
| 25 | workerScript: string, |
| 26 | workerProcessType: WorkerProcessType, |
| 27 | workerOptions?: WorkerOptions, |
| 28 | ): WorkerAbstract<T> | null { |
| 29 | if (!isMainThread) { |
| 30 | throw new Error('Cannot get a worker implementation outside the main thread'); |
| 31 | } |
| 32 | workerOptions = { ...DEFAULT_WORKER_OPTIONS, ...workerOptions }; |
| 33 | let workerImplementation: WorkerAbstract<T> | null = null; |
| 34 | switch (workerProcessType) { |
| 35 | case WorkerProcessType.workerSet: |
| 36 | workerImplementation = new WorkerSet(workerScript, workerOptions); |
| 37 | break; |
| 38 | case WorkerProcessType.staticPool: |
| 39 | workerImplementation = new WorkerStaticPool(workerScript, workerOptions); |
| 40 | break; |
| 41 | case WorkerProcessType.dynamicPool: |
| 42 | workerImplementation = new WorkerDynamicPool(workerScript, workerOptions); |
| 43 | break; |
| 44 | default: |
| 45 | // eslint-disable-next-line @typescript-eslint/restrict-template-expressions |
| 46 | throw new Error(`Worker implementation type '${workerProcessType}' not found`); |
| 47 | } |
| 48 | return workerImplementation; |
| 49 | } |
| 50 | } |