src/worker/WorkerDynamicPool.ts

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