src/worker/WorkerFactory.ts

   1 import { WorkerOptions, WorkerProcessType } from '../types/Worker';
   2
   3 import Constants from '../utils/Constants';
   4 import WorkerAbstract from './WorkerAbstract';
   5 import WorkerDynamicPool from './WorkerDynamicPool';
   6 import WorkerSet from './WorkerSet';
   7 import WorkerStaticPool from './WorkerStaticPool';
   8 import { isMainThread } from 'worker_threads';
   9
  10 export default class WorkerFactory {
  11   private constructor() {}
  12
  13   public static getWorkerImplementation<T>(workerScript: string, workerProcessType: WorkerProcessType, options?: WorkerOptions): WorkerAbstract | null {
  14     if (!isMainThread) {
  15       throw new Error('Trying to get a worker implementation outside the main thread');
  16     }
  17     options = options ?? {} as WorkerOptions;
  18     options.startDelay = options.startDelay ?? Constants.WORKER_START_DELAY;
  19     let workerImplementation: WorkerAbstract = null;
  20     switch (workerProcessType) {
  21       case WorkerProcessType.WORKER_SET:
  22         options.elementsPerWorker = options.elementsPerWorker ?? Constants.DEFAULT_CHARGING_STATIONS_PER_WORKER;
  23         workerImplementation = new WorkerSet<T>(workerScript, options.elementsPerWorker, options.startDelay);
  24         break;
  25       case WorkerProcessType.STATIC_POOL:
  26         options.poolMaxSize = options.poolMaxSize ?? Constants.DEFAULT_WORKER_POOL_MAX_SIZE;
  27         workerImplementation = new WorkerStaticPool<T>(workerScript, options.poolMaxSize, options.startDelay, options.poolOptions);
  28         break;
  29       case WorkerProcessType.DYNAMIC_POOL:
  30         options.poolMinSize = options.poolMinSize ?? Constants.DEFAULT_WORKER_POOL_MIN_SIZE;
  31         options.poolMaxSize = options.poolMaxSize ?? Constants.DEFAULT_WORKER_POOL_MAX_SIZE;
  32         workerImplementation = new WorkerDynamicPool<T>(workerScript, options.poolMinSize, options.poolMaxSize, options.startDelay, options.poolOptions);
  33         break;
  34     }
  35     return workerImplementation;
  36   }
  37 }