fix: refine type definition for transferList

[poolifier.git] / src / pools / thread / fixed.ts

diff --git a/src/pools/thread/fixed.ts b/src/pools/thread/fixed.ts
index 2ad94a7bf16083072bf1303745834c2b7c06506a..7977cd61abd5263023b855fe9f7f23ba5135de10 100644 (file)
--- a/src/pools/thread/fixed.ts
+++ b/src/pools/thread/fixed.ts
@@ -1,28 +1,18 @@
 import {
-  type MessageChannel,
-  type MessagePort,
-  SHARE_ENV,
+  isMainThread,
   type TransferListItem,
-  Worker,
-  type WorkerOptions,
-  isMainThread
+  type Worker
 } from 'node:worker_threads'
-import type { MessageValue } from '../../utility-types'
-import { AbstractPool } from '../abstract-pool'
-import { type PoolOptions, type PoolType, PoolTypes } from '../pool'
-import { type WorkerType, WorkerTypes } from '../worker'
+
+import type { MessageValue } from '../../utility-types.js'
+import { AbstractPool } from '../abstract-pool.js'
+import { type PoolOptions, type PoolType, PoolTypes } from '../pool.js'
+import { type WorkerType, WorkerTypes } from '../worker.js'
 
 /**
  * Options for a poolifier thread pool.
  */
-export interface ThreadPoolOptions extends PoolOptions<Worker> {
-  /**
-   * Worker options.
-   *
-   * @see https://nodejs.org/api/worker_threads.html#new-workerfilename-options
-   */
-  workerOptions?: WorkerOptions
-}
+export type ThreadPoolOptions = PoolOptions<Worker>
 
 /**
  * A thread pool with a fixed number of threads.
@@ -46,9 +36,10 @@ export class FixedThreadPool<
   public constructor (
     numberOfThreads: number,
     filePath: string,
-    protected readonly opts: ThreadPoolOptions = {}
+    opts: ThreadPoolOptions = {},
+    maximumNumberOfThreads?: number
   ) {
-    super(numberOfThreads, filePath, opts)
+    super(numberOfThreads, filePath, opts, maximumNumberOfThreads)
   }
 
   /** @inheritDoc */
@@ -56,33 +47,17 @@ export class FixedThreadPool<
     return isMainThread
   }
 
-  /** @inheritDoc */
-  protected async destroyWorkerNode (workerNodeKey: number): Promise<void> {
-    this.flushTasksQueue(workerNodeKey)
-    // FIXME: wait for tasks to be finished
-    const workerNode = this.workerNodes[workerNodeKey]
-    const worker = workerNode.worker
-    const waitWorkerExit = new Promise<void>(resolve => {
-      worker.on('exit', () => {
-        resolve()
-      })
-    })
-    await this.sendKillMessageToWorker(workerNodeKey)
-    workerNode.closeChannel()
-    await worker.terminate()
-    await waitWorkerExit
-  }
-
   /** @inheritDoc */
   protected sendToWorker (
     workerNodeKey: number,
     message: MessageValue<Data>,
-    transferList?: TransferListItem[]
+    transferList?: readonly TransferListItem[]
   ): void {
-    (
-      this.workerNodes[workerNodeKey].messageChannel as MessageChannel
-    ).port1.postMessage(
-      { ...message, workerId: this.workerNodes[workerNodeKey].info.id },
+    this.workerNodes[workerNodeKey]?.messageChannel?.port1.postMessage(
+      {
+        ...message,
+        workerId: this.getWorkerInfo(workerNodeKey)?.id
+      } satisfies MessageValue<Data>,
       transferList
     )
   }
@@ -90,14 +65,14 @@ export class FixedThreadPool<
   /** @inheritDoc */
   protected sendStartupMessageToWorker (workerNodeKey: number): void {
     const workerNode = this.workerNodes[workerNodeKey]
-    const port2: MessagePort = (workerNode.messageChannel as MessageChannel)
-      .port2
+    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+    const port2 = workerNode.messageChannel!.port2
     workerNode.worker.postMessage(
       {
         ready: false,
-        workerId: workerNode.info.id,
+        workerId: this.getWorkerInfo(workerNodeKey)?.id,
         port: port2
-      },
+      } satisfies MessageValue<Data>,
       [port2]
     )
   }
@@ -107,17 +82,42 @@ export class FixedThreadPool<
     workerNodeKey: number,
     listener: (message: MessageValue<Message>) => void
   ): void {
-    (
-      this.workerNodes[workerNodeKey].messageChannel as MessageChannel
-    ).port1.on('message', listener)
+    this.workerNodes[workerNodeKey].messageChannel?.port1.on(
+      'message',
+      listener
+    )
+  }
+
+  /** @inheritDoc */
+  protected registerOnceWorkerMessageListener<Message extends Data | Response>(
+    workerNodeKey: number,
+    listener: (message: MessageValue<Message>) => void
+  ): void {
+    this.workerNodes[workerNodeKey].messageChannel?.port1.once(
+      'message',
+      listener
+    )
+  }
+
+  /** @inheritDoc */
+  protected deregisterWorkerMessageListener<Message extends Data | Response>(
+    workerNodeKey: number,
+    listener: (message: MessageValue<Message>) => void
+  ): void {
+    this.workerNodes[workerNodeKey].messageChannel?.port1.off(
+      'message',
+      listener
+    )
+  }
+
+  /** @inheritDoc */
+  protected shallCreateDynamicWorker (): boolean {
+    return false
   }
 
   /** @inheritDoc */
-  protected createWorker (): Worker {
-    return new Worker(this.filePath, {
-      env: SHARE_ENV,
-      ...this.opts.workerOptions
-    })
+  protected checkAndEmitDynamicWorkerCreationEvents (): void {
+    /* noop */
   }
 
   /** @inheritDoc */