| 1 | import { type Worker, isMainThread } from 'node:worker_threads'; |
| 2 | |
| 3 | import type { PoolOptions } from 'poolifier'; |
| 4 | |
| 5 | import type { WorkerAbstract } from './WorkerAbstract'; |
| 6 | import { WorkerConstants } from './WorkerConstants'; |
| 7 | import { WorkerDynamicPool } from './WorkerDynamicPool'; |
| 8 | import { WorkerSet } from './WorkerSet'; |
| 9 | import { WorkerStaticPool } from './WorkerStaticPool'; |
| 10 | import { type WorkerData, type WorkerOptions, WorkerProcessType } from './WorkerTypes'; |
| 11 | |
| 12 | export class WorkerFactory { |
| 13 | private constructor() { |
| 14 | // This is intentional |
| 15 | } |
| 16 | |
| 17 | public static getWorkerImplementation<T extends WorkerData>( |
| 18 | workerScript: string, |
| 19 | workerProcessType: WorkerProcessType, |
| 20 | workerOptions?: WorkerOptions |
| 21 | ): WorkerAbstract<T> | null { |
| 22 | if (!isMainThread) { |
| 23 | throw new Error('Cannot get a worker implementation outside the main thread'); |
| 24 | } |
| 25 | workerOptions = workerOptions ?? (WorkerConstants.EMPTY_OBJECT as WorkerOptions); |
| 26 | workerOptions.workerStartDelay = |
| 27 | workerOptions?.workerStartDelay ?? WorkerConstants.DEFAULT_WORKER_START_DELAY; |
| 28 | workerOptions.elementStartDelay = |
| 29 | workerOptions?.elementStartDelay ?? WorkerConstants.DEFAULT_ELEMENT_START_DELAY; |
| 30 | workerOptions.poolOptions = |
| 31 | workerOptions?.poolOptions ?? (WorkerConstants.EMPTY_OBJECT as PoolOptions<Worker>); |
| 32 | workerOptions?.messageHandler && |
| 33 | (workerOptions.poolOptions.messageHandler = workerOptions.messageHandler); |
| 34 | let workerImplementation: WorkerAbstract<T> | null = null; |
| 35 | switch (workerProcessType) { |
| 36 | case WorkerProcessType.workerSet: |
| 37 | workerOptions.elementsPerWorker = |
| 38 | workerOptions?.elementsPerWorker ?? WorkerConstants.DEFAULT_ELEMENTS_PER_WORKER; |
| 39 | workerImplementation = new WorkerSet(workerScript, workerOptions); |
| 40 | break; |
| 41 | case WorkerProcessType.staticPool: |
| 42 | workerOptions.poolMaxSize = |
| 43 | workerOptions?.poolMaxSize ?? WorkerConstants.DEFAULT_POOL_MAX_SIZE; |
| 44 | workerImplementation = new WorkerStaticPool(workerScript, workerOptions); |
| 45 | break; |
| 46 | case WorkerProcessType.dynamicPool: |
| 47 | workerOptions.poolMinSize = |
| 48 | workerOptions?.poolMinSize ?? WorkerConstants.DEFAULT_POOL_MIN_SIZE; |
| 49 | workerOptions.poolMaxSize = |
| 50 | workerOptions?.poolMaxSize ?? WorkerConstants.DEFAULT_POOL_MAX_SIZE; |
| 51 | workerImplementation = new WorkerDynamicPool(workerScript, workerOptions); |
| 52 | break; |
| 53 | default: |
| 54 | // eslint-disable-next-line @typescript-eslint/restrict-template-expressions |
| 55 | throw new Error(`Worker implementation type '${workerProcessType}' not found`); |
| 56 | } |
| 57 | return workerImplementation; |
| 58 | } |
| 59 | } |