src/worker/WorkerAbstract.ts

   1 import { WorkerData, WorkerOptions } from '../types/Worker';
   2
   3 import WorkerConstants from './WorkerConstants';
   4 import fs from 'fs';
   5
   6 export default abstract class WorkerAbstract<T extends WorkerData> {
   7   protected readonly workerScript: string;
   8   protected readonly workerOptions: WorkerOptions;
   9   public abstract readonly size: number;
  10   public abstract readonly maxElementsPerWorker: number | null;
  11
  12   /**
  13    * `WorkerAbstract` constructor.
  14    *
  15    * @param workerScript
  16    * @param workerOptions
  17    */
  18   constructor(
  19     workerScript: string,
  20     workerOptions: WorkerOptions = {
  21       workerStartDelay: WorkerConstants.DEFAULT_WORKER_START_DELAY,
  22       elementStartDelay: WorkerConstants.DEFAULT_ELEMENT_START_DELAY,
  23       poolMinSize: WorkerConstants.DEFAULT_POOL_MIN_SIZE,
  24       poolMaxSize: WorkerConstants.DEFAULT_POOL_MAX_SIZE,
  25       elementsPerWorker: WorkerConstants.DEFAULT_ELEMENTS_PER_WORKER,
  26       poolOptions: {},
  27       messageHandler: () => {
  28         /* This is intentional */
  29       },
  30     }
  31   ) {
  32     if (!workerScript) {
  33       throw new Error('Worker script is not defined');
  34     }
  35     if (!fs.existsSync(workerScript)) {
  36       throw new Error('Worker script file does not exist');
  37     }
  38     this.workerScript = workerScript;
  39     this.workerOptions = workerOptions;
  40   }
  41
  42   public abstract start(): Promise<void>;
  43   public abstract stop(): Promise<void>;
  44   public abstract addElement(elementData: T): Promise<void>;
  45 }