src/worker/WorkerFixedPool.ts

   1 import type { EventEmitterAsyncResource } from 'node:events'
   2
   3 import { FixedThreadPool, type PoolInfo } from 'poolifier'
   4
   5 import { WorkerAbstract } from './WorkerAbstract.js'
   6 import type { WorkerData, WorkerOptions } from './WorkerTypes.js'
   7 import { randomizeDelay, sleep } from './WorkerUtils.js'
   8
   9 export class WorkerFixedPool extends WorkerAbstract<WorkerData> {
  10   private readonly pool: FixedThreadPool<WorkerData>
  11
  12   /**
  13    * Creates a new `WorkerFixedPool`.
  14    *
  15    * @param workerScript -
  16    * @param workerOptions -
  17    */
  18   constructor (workerScript: string, workerOptions: WorkerOptions) {
  19     super(workerScript, workerOptions)
  20     this.pool = new FixedThreadPool(
  21       this.workerOptions.poolMaxSize,
  22       this.workerScript,
  23       this.workerOptions.poolOptions
  24     )
  25   }
  26
  27   get info (): PoolInfo {
  28     return this.pool.info
  29   }
  30
  31   get size (): number {
  32     return this.pool.info.workerNodes
  33   }
  34
  35   get maxElementsPerWorker (): number | undefined {
  36     return undefined
  37   }
  38
  39   get emitter (): EventEmitterAsyncResource | undefined {
  40     return this.pool.emitter
  41   }
  42
  43   /** @inheritDoc */
  44   public start (): void {
  45     this.pool.start()
  46   }
  47
  48   /** @inheritDoc */
  49   public async stop (): Promise<void> {
  50     await this.pool.destroy()
  51   }
  52
  53   /** @inheritDoc */
  54   public async addElement (elementData: WorkerData): Promise<void> {
  55     await this.pool.execute(elementData)
  56     // Start element sequentially to optimize memory at startup
  57     // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
  58     this.workerOptions.elementAddDelay! > 0 &&
  59       // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
  60       (await sleep(randomizeDelay(this.workerOptions.elementAddDelay!)))
  61   }
  62 }