src/worker/WorkerFactory.ts

   1 import { isMainThread } from 'node:worker_threads'
   2
   3 import { mergeDeepRight } from 'rambda'
   4
   5 import type { WorkerAbstract } from './WorkerAbstract.js'
   6 import { DEFAULT_WORKER_OPTIONS } from './WorkerConstants.js'
   7 import { WorkerDynamicPool } from './WorkerDynamicPool.js'
   8 import { WorkerFixedPool } from './WorkerFixedPool.js'
   9 import { WorkerSet } from './WorkerSet.js'
  10 import { type WorkerData, type WorkerOptions, WorkerProcessType } from './WorkerTypes.js'
  11
  12 // eslint-disable-next-line @typescript-eslint/no-extraneous-class
  13 export class WorkerFactory {
  14   private constructor () {
  15     // This is intentional
  16   }
  17
  18   public static getWorkerImplementation<D extends WorkerData, R extends WorkerData>(
  19     workerScript: string,
  20     workerProcessType: WorkerProcessType,
  21     workerOptions?: WorkerOptions
  22   ): WorkerAbstract<D, R> {
  23     if (!isMainThread) {
  24       throw new Error('Cannot get a worker implementation outside the main thread')
  25     }
  26     workerOptions = mergeDeepRight<WorkerOptions>(DEFAULT_WORKER_OPTIONS, workerOptions ?? {})
  27     switch (workerProcessType) {
  28       case WorkerProcessType.workerSet:
  29         return new WorkerSet<D, R>(workerScript, workerOptions)
  30       case WorkerProcessType.fixedPool:
  31         return new WorkerFixedPool<D, R>(workerScript, workerOptions)
  32       case WorkerProcessType.dynamicPool:
  33         return new WorkerDynamicPool<D, R>(workerScript, workerOptions)
  34       default:
  35         // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
  36         throw new Error(`Worker implementation type '${workerProcessType}' not found`)
  37     }
  38   }
  39 }