| 1 | import { Worker, isMainThread } from 'worker_threads'; |
| 2 | import { WorkerData, WorkerOptions, WorkerProcessType } from '../types/Worker'; |
| 3 | |
| 4 | import { PoolOptions } from 'poolifier'; |
| 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 | |
| 11 | export default class WorkerFactory { |
| 12 | private constructor() { |
| 13 | // This is intentional |
| 14 | } |
| 15 | |
| 16 | public static getWorkerImplementation<T extends WorkerData>( |
| 17 | workerScript: string, |
| 18 | workerProcessType: WorkerProcessType, |
| 19 | workerOptions?: WorkerOptions |
| 20 | ): WorkerAbstract<T> | null { |
| 21 | if (!isMainThread) { |
| 22 | throw new Error('Cannot get a worker implementation outside the main thread'); |
| 23 | } |
| 24 | workerOptions = workerOptions ?? ({} as WorkerOptions); |
| 25 | workerOptions.workerStartDelay = |
| 26 | workerOptions?.workerStartDelay ?? WorkerConstants.DEFAULT_WORKER_START_DELAY; |
| 27 | workerOptions.elementStartDelay = |
| 28 | workerOptions?.elementStartDelay ?? WorkerConstants.DEFAULT_ELEMENT_START_DELAY; |
| 29 | workerOptions.poolOptions = workerOptions?.poolOptions ?? ({} as PoolOptions<Worker>); |
| 30 | workerOptions?.messageHandler && |
| 31 | // eslint-disable-next-line @typescript-eslint/no-misused-promises |
| 32 | (workerOptions.poolOptions.messageHandler = workerOptions.messageHandler); |
| 33 | let workerImplementation: WorkerAbstract<T> = null; |
| 34 | switch (workerProcessType) { |
| 35 | case WorkerProcessType.WORKER_SET: |
| 36 | workerOptions.elementsPerWorker = |
| 37 | workerOptions?.elementsPerWorker ?? WorkerConstants.DEFAULT_ELEMENTS_PER_WORKER; |
| 38 | workerImplementation = new WorkerSet(workerScript, workerOptions); |
| 39 | break; |
| 40 | case WorkerProcessType.STATIC_POOL: |
| 41 | workerOptions.poolMaxSize = |
| 42 | workerOptions?.poolMaxSize ?? WorkerConstants.DEFAULT_POOL_MAX_SIZE; |
| 43 | workerImplementation = new WorkerStaticPool(workerScript, workerOptions); |
| 44 | break; |
| 45 | case WorkerProcessType.DYNAMIC_POOL: |
| 46 | workerOptions.poolMinSize = |
| 47 | workerOptions?.poolMinSize ?? WorkerConstants.DEFAULT_POOL_MIN_SIZE; |
| 48 | workerOptions.poolMaxSize = |
| 49 | workerOptions?.poolMaxSize ?? WorkerConstants.DEFAULT_POOL_MAX_SIZE; |
| 50 | workerImplementation = new WorkerDynamicPool(workerScript, workerOptions); |
| 51 | break; |
| 52 | default: |
| 53 | // eslint-disable-next-line @typescript-eslint/restrict-template-expressions |
| 54 | throw new Error(`Worker implementation type '${workerProcessType}' not found`); |
| 55 | } |
| 56 | return workerImplementation; |
| 57 | } |
| 58 | } |