Reduce a bit more the charging station instance memory footprint

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

diff --git a/src/charging-station/ocpp/OCPPIncomingRequestService.ts b/src/charging-station/ocpp/OCPPIncomingRequestService.ts
index 897127b6e2ffa029073db6e365c969356c4490da..bf5170956f499d4c9e41897f879bc0a1e095c320 100644 (file)
--- a/src/charging-station/ocpp/OCPPIncomingRequestService.ts
+++ b/src/charging-station/ocpp/OCPPIncomingRequestService.ts
@@ -1,12 +1,49 @@
-import ChargingStation from '../ChargingStation';
+import type ChargingStation from '../ChargingStation';
+import { HandleErrorParams } from '../../types/Error';
 import { IncomingRequestCommand } from '../../types/ocpp/Requests';
+import { JsonType } from '../../types/JsonType';
+import logger from '../../utils/Logger';
 
 export default abstract class OCPPIncomingRequestService {
-  protected chargingStation: ChargingStation;
+  private static instance: OCPPIncomingRequestService | null = null;
 
-  constructor(chargingStation: ChargingStation) {
-    this.chargingStation = chargingStation;
+  protected constructor() {
+    // This is intentional
   }
 
-  public abstract handleRequest(messageId: string, commandName: IncomingRequestCommand, commandPayload: Record<string, unknown>): Promise<void>;
+  public static getInstance<T extends OCPPIncomingRequestService>(this: new () => T): T {
+    if (!OCPPIncomingRequestService.instance) {
+      OCPPIncomingRequestService.instance = new this();
+    }
+    return OCPPIncomingRequestService.instance as T;
+  }
+
+  protected handleIncomingRequestError<T>(
+    chargingStation: ChargingStation,
+    commandName: IncomingRequestCommand,
+    error: Error,
+    params: HandleErrorParams<T> = { throwError: true }
+  ): T {
+    logger.error(
+      chargingStation.logPrefix() + ' Incoming request command %s error: %j',
+      commandName,
+      error
+    );
+    if (!params?.throwError && params?.errorResponse) {
+      return params?.errorResponse;
+    }
+    if (params?.throwError && !params?.errorResponse) {
+      throw error;
+    }
+    if (params?.throwError && params?.errorResponse) {
+      return params?.errorResponse;
+    }
+  }
+
+  public abstract incomingRequestHandler(
+    chargingStation: ChargingStation,
+    messageId: string,
+    commandName: IncomingRequestCommand,
+    commandPayload: JsonType
+  ): Promise<void>;
 }