fix: only process worker message events when necessary

[e-mobility-charging-stations-simulator.git] / src / charging-station / ChargingStationWorker.ts

diff --git a/src/charging-station/ChargingStationWorker.ts b/src/charging-station/ChargingStationWorker.ts
index 81e0296d8761eca012b63085553df13615b14980..ab32a464fabbcf3ca3ee2e20a7c48d685945f327 100644 (file)
--- a/src/charging-station/ChargingStationWorker.ts
+++ b/src/charging-station/ChargingStationWorker.ts
@@ -1,42 +1,72 @@
-// Partial Copyright Jerome Benoit. 2021. All Rights Reserved.
+// Partial Copyright Jerome Benoit. 2021-2024. All Rights Reserved.
 
-import { ChargingStationWorkerData, WorkerMessage, WorkerMessageEvents } from '../types/Worker';
-import { parentPort, workerData } from 'worker_threads';
+import { parentPort } from 'node:worker_threads'
 
-import ChargingStation from './ChargingStation';
-import Constants from '../utils/Constants';
-import { ThreadWorker } from 'poolifier';
-import Utils from '../utils/Utils';
+import { ThreadWorker } from 'poolifier'
 
-// Conditionally export ThreadWorker instance for pool usage
-export let threadWorker: ThreadWorker;
-if (Utils.workerPoolInUse()) {
-  threadWorker = new ThreadWorker<ChargingStationWorkerData>(startChargingStation, { maxInactiveTime: Constants.WORKER_POOL_MAX_INACTIVE_TIME, async: false });
-} else {
-  // Add message listener to start charging station from main thread
-  addMessageListener();
-  if (!Utils.isUndefined(workerData)) {
-    startChargingStation({ index: workerData.index as number, templateFile: workerData.templateFile as string });
-  }
-}
+import { BaseError } from '../exception/index.js'
+import type { ChargingStationInfo, ChargingStationWorkerData } from '../types/index.js'
+import { Configuration } from '../utils/index.js'
+import { type WorkerDataError, type WorkerMessage, WorkerMessageEvents } from '../worker/index.js'
+import { ChargingStation } from './ChargingStation.js'
 
-/**
- * Listen messages send by the main thread
- */
-function addMessageListener(): void {
-  parentPort?.on('message', (message: WorkerMessage) => {
-    if (message.id === WorkerMessageEvents.START_WORKER_ELEMENT) {
-      startChargingStation(message.data);
+export let chargingStationWorker: object
+if (Configuration.workerPoolInUse()) {
+  chargingStationWorker = new ThreadWorker<
+  ChargingStationWorkerData,
+  ChargingStationInfo | undefined
+  >((data?: ChargingStationWorkerData): ChargingStationInfo | undefined => {
+    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+    const { index, templateFile, options } = data!
+    return new ChargingStation(index, templateFile, options).stationInfo
+  })
+} else {
+  // eslint-disable-next-line @typescript-eslint/no-extraneous-class
+  class ChargingStationWorker<Data extends ChargingStationWorkerData> {
+    constructor () {
+      parentPort?.on('message', (message: WorkerMessage<Data>) => {
+        const { uuid, event, data } = message
+        // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+        if (uuid != null) {
+          switch (event) {
+            case WorkerMessageEvents.addWorkerElement:
+              try {
+                const chargingStation = new ChargingStation(
+                  data.index,
+                  data.templateFile,
+                  data.options
+                )
+                parentPort?.postMessage({
+                  uuid,
+                  event: WorkerMessageEvents.addedWorkerElement,
+                  // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+                  data: chargingStation.stationInfo!
+                } satisfies WorkerMessage<ChargingStationInfo>)
+              } catch (error) {
+                parentPort?.postMessage({
+                  uuid,
+                  event: WorkerMessageEvents.workerElementError,
+                  data: {
+                    event,
+                    name: (error as Error).name,
+                    message: (error as Error).message,
+                    stack: (error as Error).stack
+                  }
+                } satisfies WorkerMessage<WorkerDataError>)
+              }
+              break
+            default:
+              throw new BaseError(
+                `Unknown worker message event: '${event}' received with data: '${JSON.stringify(
+                  data,
+                  undefined,
+                  2
+                )}'`
+              )
+          }
+        }
+      })
     }
-  });
-}
-
-/**
- * Create and start a charging station instance
- *
- * @param data workerData
- */
-function startChargingStation(data: ChargingStationWorkerData): void {
-  const station = new ChargingStation(data.index, data.templateFile);
-  station.start();
+  }
+  chargingStationWorker = new ChargingStationWorker<ChargingStationWorkerData>()
 }