Merge branch 'master' into feature/task-functions

[poolifier.git] / src / worker / thread-worker.ts

diff --git a/src/worker/thread-worker.ts b/src/worker/thread-worker.ts
index a8424fbf0151e0ffa59674b4a5575fe604b5543e..ede0b3b5602f6335e2fc0c3409a719fd5edbf5b6 100644 (file)
--- a/src/worker/thread-worker.ts
+++ b/src/worker/thread-worker.ts
@@ -1,8 +1,13 @@
-import type { MessagePort } from 'worker_threads'
-import { isMainThread, parentPort } from 'worker_threads'
+import {
+  type MessagePort,
+  isMainThread,
+  parentPort,
+  threadId
+} from 'node:worker_threads'
 import type { MessageValue } from '../utility-types'
 import { AbstractWorker } from './abstract-worker'
 import type { WorkerOptions } from './worker-options'
+import type { TaskFunction, TaskFunctions } from './task-functions'
 
 /**
  * A thread worker used by a poolifier `ThreadPool`.
@@ -13,8 +18,8 @@ import type { WorkerOptions } from './worker-options'
  * If you use a `DynamicThreadPool` the extra workers that were created will be terminated,
  * but the minimum number of workers will be guaranteed.
  *
- * @typeParam Data - Type of data this worker receives from pool's execution. This can only be serializable data.
- * @typeParam Response - Type of response the worker sends back to the main thread. This can only be serializable data.
+ * @typeParam Data - Type of data this worker receives from pool's execution. This can only be structured-cloneable data.
+ * @typeParam Response - Type of response the worker sends back to the main thread. This can only be structured-cloneable data.
  * @author [Alessandro Pio Ardizio](https://github.com/pioardi)
  * @since 0.0.1
  */
@@ -22,18 +27,73 @@ export class ThreadWorker<
   Data = unknown,
   Response = unknown
 > extends AbstractWorker<MessagePort, Data, Response> {
+  /**
+   * Message port used to communicate with the main worker.
+   */
+  private port!: MessagePort
   /**
    * Constructs a new poolifier thread worker.
    *
-   * @param fn - Function processed by the worker when the pool's `execution` function is invoked.
+   * @param taskFunctions - Task function(s) processed by the worker when the pool's `execution` function is invoked.
    * @param opts - Options for the worker.
    */
-  public constructor (fn: (data: Data) => Response, opts: WorkerOptions = {}) {
-    super('worker-thread-pool:poolifier', isMainThread, fn, parentPort, opts)
+  public constructor (
+    taskFunctions: TaskFunction<Data, Response> | TaskFunctions<Data, Response>,
+    opts: WorkerOptions = {}
+  ) {
+    super(
+      'worker-thread-pool:poolifier',
+      isMainThread,
+      parentPort as MessagePort,
+      taskFunctions,
+      opts
+    )
+  }
+
+  /** @inheritDoc */
+  protected handleReadyMessage (message: MessageValue<Data>): void {
+    if (
+      message.workerId === this.id &&
+      message.ready === false &&
+      message.port != null
+    ) {
+      try {
+        this.port = message.port
+        this.port.on('message', this.messageListener.bind(this))
+        this.sendToMainWorker({
+          ready: true,
+          taskFunctionNames: this.listTaskFunctionNames(),
+          workerId: this.id
+        })
+      } catch {
+        this.sendToMainWorker({
+          ready: false,
+          taskFunctionNames: this.listTaskFunctionNames(),
+          workerId: this.id
+        })
+      }
+    }
+  }
+
+  /** @inheritDoc */
+  protected handleKillMessage (message: MessageValue<Data>): void {
+    super.handleKillMessage(message)
+    this.port?.unref()
+    this.port?.close()
+  }
+
+  /** @inheritDoc */
+  protected get id (): number {
+    return threadId
   }
 
-  /** {@inheritDoc} */
+  /** @inheritDoc */
   protected sendToMainWorker (message: MessageValue<Response>): void {
-    this.getMainWorker().postMessage(message)
+    this.port.postMessage(message)
+  }
+
+  /** @inheritDoc */
+  protected handleError (e: Error | string): string {
+    return e as string
   }
 }