X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fworker%2FWorkerSet.ts;h=1da58e9ec0c81d78cde805217c293d529ecc584c;hb=8eb3b688c4b6fb3e946f38d474a5125caf1d056a;hp=50d099d856633ff5cbc8ad6c5d1f57813a750b1e;hpb=c045d9a97ebdf3747b82746b733b0c60a7db3f32;p=e-mobility-charging-stations-simulator.git

diff --git a/src/worker/WorkerSet.ts b/src/worker/WorkerSet.ts
index 50d099d8..1da58e9e 100644
--- a/src/worker/WorkerSet.ts
+++ b/src/worker/WorkerSet.ts
@@ -1,86 +1,132 @@
-import { WorkerData, WorkerEvents, WorkerSetElement } from '../types/Worker';
+// Partial Copyright Jerome Benoit. 2021. All Rights Reserved.
 
-import Constants from '../utils/Constants';
-import Utils from '../utils/Utils';
 import { Worker } from 'worker_threads';
-import Wrk from './Wrk';
 
-export default class WorkerSet extends Wrk {
-  public maxElementsPerWorker: number;
-  private workers: Set<WorkerSetElement>;
+import { WorkerData, WorkerMessageEvents, WorkerOptions, WorkerSetElement } from '../types/Worker';
+import Utils from '../utils/Utils';
+import WorkerAbstract from './WorkerAbstract';
+import { WorkerUtils } from './WorkerUtils';
+
+export default class WorkerSet extends WorkerAbstract<WorkerData> {
+  private readonly workerSet: Set<WorkerSetElement>;
+  private readonly messageHandler: (message: unknown) => void | Promise<void>;
 
   /**
    * Create a new `WorkerSet`.
    *
-   * @param {string} workerScript
-   * @param {number} maxElementsPerWorker
+   * @param workerScript
+   * @param workerOptions
    */
-  constructor(workerScript: string, maxElementsPerWorker = 1) {
-    super(workerScript);
-    this.workers = new Set<WorkerSetElement>();
-    this.maxElementsPerWorker = maxElementsPerWorker;
+  constructor(workerScript: string, workerOptions?: WorkerOptions) {
+    super(workerScript, workerOptions);
+    this.workerSet = new Set<WorkerSetElement>();
+    this.messageHandler =
+      workerOptions?.messageHandler ??
+      (() => {
+        /* This is intentional */
+      });
   }
 
   get size(): number {
-    return this.workers.size;
+    return this.workerSet.size;
+  }
+
+  get maxElementsPerWorker(): number | null {
+    return this.workerOptions.elementsPerWorker;
   }
 
   /**
    *
-   * @return {Promise<void>}
+   * @param elementData
+   * @returns
    * @public
    */
   public async addElement(elementData: WorkerData): Promise<void> {
-    if (!this.workers) {
-      throw Error('Cannot add a WorkerSet element: workers set does not exist');
+    if (!this.workerSet) {
+      throw new Error("Cannot add a WorkerSet element: workers' set does not exist");
     }
-    if (this.getLastWorkerSetElement().numberOfWorkerElements >= this.maxElementsPerWorker) {
-      void this.startWorker();
-      // Start worker sequentially to optimize memory at startup
-      void Utils.sleep(Constants.START_WORKER_DELAY);
+    if (
+      this.workerSet.size === 0 ||
+      this.getLastWorkerSetElement().numberOfWorkerElements >= this.workerOptions.elementsPerWorker
+    ) {
+      await this.startWorker();
     }
-    this.getLastWorker().postMessage({ id: WorkerEvents.START_WORKER_ELEMENT, workerData: elementData });
+    this.getLastWorker().postMessage({
+      id: WorkerMessageEvents.START_WORKER_ELEMENT,
+      data: elementData,
+    });
     this.getLastWorkerSetElement().numberOfWorkerElements++;
+    // Start element sequentially to optimize memory at startup
+    if (this.workerOptions.elementStartDelay > 0) {
+      await Utils.sleep(this.workerOptions.elementStartDelay);
+    }
   }
 
   /**
    *
-   * @return {Promise<void>}
+   * @returns
    * @public
    */
   public async start(): Promise<void> {
     await this.startWorker();
-    // Start worker sequentially to optimize memory at startup
-    await Utils.sleep(Constants.START_WORKER_DELAY);
   }
 
   /**
    *
-   * @return {Promise}
+   * @returns
+   * @public
+   */
+  public async stop(): Promise<void> {
+    for (const workerSetElement of this.workerSet) {
+      await workerSetElement.worker.terminate();
+    }
+    this.workerSet.clear();
+  }
+
+  /**
+   *
    * @private
    */
-  private async startWorker() {
-    return new Promise((resolve, reject) => {
-      const worker = new Worker(this.workerScript);
-      worker.on('message', resolve);
-      worker.on('error', reject);
-      worker.on('exit', (code) => {
-        if (code !== 0) {
-          reject(new Error(`Worker stopped with exit code ${code}`));
-        }
+  private async startWorker(): Promise<void> {
+    const worker = new Worker(this.workerScript);
+    worker.on('message', (msg) => {
+      (async () => {
+        await this.messageHandler(msg);
+      })().catch(() => {
+        /* This is intentional */
       });
-      this.workers.add({ worker, numberOfWorkerElements: 0 });
     });
+    worker.on('error', WorkerUtils.defaultErrorHandler);
+    worker.on('exit', (code) => {
+      WorkerUtils.defaultExitHandler(code);
+      this.workerSet.delete(this.getWorkerSetElementByWorker(worker));
+    });
+    this.workerSet.add({ worker, numberOfWorkerElements: 0 });
+    // Start worker sequentially to optimize memory at startup
+    this.workerOptions.workerStartDelay > 0 &&
+      (await Utils.sleep(this.workerOptions.workerStartDelay));
   }
 
   private getLastWorkerSetElement(): WorkerSetElement {
     let workerSetElement: WorkerSetElement;
-    // eslint-disable-next-line no-empty
-    for (workerSetElement of this.workers) { }
+    for (workerSetElement of this.workerSet) {
+      /* This is intentional */
+    }
     return workerSetElement;
   }
 
   private getLastWorker(): Worker {
     return this.getLastWorkerSetElement().worker;
   }
+
+  private getWorkerSetElementByWorker(worker: Worker): WorkerSetElement {
+    let workerSetElt: WorkerSetElement;
+    for (const workerSetElement of this.workerSet) {
+      if (workerSetElement.worker.threadId === worker.threadId) {
+        workerSetElt = workerSetElement;
+        break;
+      }
+    }
+    return workerSetElt;
+  }
 }