src/worker/WorkerFactory.ts

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