src/worker/WorkerDynamicPool.ts

   1 import { WorkerData, WorkerOptions } from '../types/Worker';
   2
   3 import { DynamicThreadPool } from 'poolifier';
   4 import Utils from '../utils/Utils';
   5 import WorkerAbstract from './WorkerAbstract';
   6 import { WorkerUtils } from './WorkerUtils';
   7
   8 export default class WorkerDynamicPool extends WorkerAbstract<WorkerData> {
   9   private readonly pool: DynamicThreadPool<WorkerData>;
  10
  11   /**
  12    * Create a new `WorkerDynamicPool`.
  13    *
  14    * @param workerScript
  15    * @param workerOptions
  16    */
  17   constructor(workerScript: string, workerOptions?: WorkerOptions) {
  18     super(workerScript, workerOptions);
  19     this.workerOptions.poolOptions.exitHandler = this.workerOptions?.poolOptions?.exitHandler ?? WorkerUtils.defaultExitHandler;
  20     this.pool = new DynamicThreadPool<WorkerData>(this.workerOptions.poolMinSize, this.workerOptions.poolMaxSize, this.workerScript, this.workerOptions.poolOptions);
  21   }
  22
  23   get size(): number {
  24     return this.pool.workers.length;
  25   }
  26
  27   get maxElementsPerWorker(): number | null {
  28     return null;
  29   }
  30
  31   /**
  32    *
  33    * @returns
  34    * @public
  35    */
  36   public async start(): Promise<void> {
  37     // This is intentional
  38   }
  39
  40   /**
  41    *
  42    * @returns
  43    * @public
  44    */
  45   public async stop(): Promise<void> {
  46     return this.pool.destroy();
  47   }
  48
  49   /**
  50    *
  51    * @param elementData
  52    * @returns
  53    * @public
  54    */
  55   public async addElement(elementData: WorkerData): Promise<void> {
  56     await this.pool.execute(elementData);
  57     // Start element sequentially to optimize memory at startup
  58     this.workerOptions.elementStartDelay > 0 && await Utils.sleep(this.workerOptions.elementStartDelay);
  59   }
  60 }