src/worker/thread-worker.ts

   1 import type { MessagePort } from 'worker_threads'
   2 import { isMainThread, parentPort } from 'worker_threads'
   3 import type { MessageValue } from '../utility-types'
   4 import { AbstractWorker } from './abstract-worker'
   5 import type { WorkerOptions } from './worker-options'
   6
   7 /**
   8  * A thread worker used by a poolifier `ThreadPool`.
   9  *
  10  * When this worker is inactive for more than the given `maxInactiveTime`,
  11  * it will send a termination request to its main thread.
  12  *
  13  * If you use a `DynamicThreadPool` the extra workers that were created will be terminated,
  14  * but the minimum number of workers will be guaranteed.
  15  *
  16  * @template Data Type of data this worker receives from pool's execution. This can only be serializable data.
  17  * @template Response Type of response the worker sends back to the main thread. This can only be serializable data.
  18  *
  19  * @author [Alessandro Pio Ardizio](https://github.com/pioardi)
  20  * @since 0.0.1
  21  */
  22 export class ThreadWorker<
  23   Data = unknown,
  24   Response = unknown
  25 > extends AbstractWorker<MessagePort, Data, Response> {
  26   /**
  27    * Constructs a new poolifier thread worker.
  28    *
  29    * @param fn Function processed by the worker when the pool's `execution` function is invoked.
  30    * @param opts Options for the worker.
  31    */
  32   public constructor (fn: (data: Data) => Response, opts: WorkerOptions = {}) {
  33     super('worker-thread-pool:pioardi', isMainThread, fn, parentPort, opts)
  34   }
  35
  36   protected sendToMainWorker (message: MessageValue<Response>): void {
  37     this.getMainWorker().postMessage(message)
  38   }
  39 }