move metrics definition to service

server/src/controller/metricsController.ts

@@ -4,58 +4,21 @@ import { Counter, Gauge, collectDefaultMetrics, register } from "prom-client";
 import { LocationService } from "../services/locationService";
 import { WifiLocationService } from "../services/wifiLocationService";
 import { TtnGatewayReceptionService } from "../services/ttnGatewayReceptionService";
+import { MetricsService } from "../services/metricsService";
 
 const router = express.Router();
 const locationService = container.resolve(LocationService);
 const wifiLocationService = container.resolve(WifiLocationService);
 const ttnGatewayReceptionService = container.resolve(TtnGatewayReceptionService);
+const metricsService = container.resolve(MetricsService);
 
-// Collect default system metrics (e.g., CPU, memory usage)
-const prefix = 'locationhub_';
-collectDefaultMetrics({ prefix });
-
-// Define a custom Counter metric
-const requestCounter = new Counter({
-  name: `${prefix}http_requests_total`,
-  help: "Total number of HTTP requests",
-  labelNames: ["method", "route", "status"],
-});
-
-const locationsTotal = new Gauge({
-  name: `${prefix}locations_total`,
-  help: "Total number of location entries in database",
-  labelNames: ["database"],
-});
-
-const gnssLocationsTotal = new Gauge({
-  name: `${prefix}gnss_locations_total`,
-  help: "Total number of location entries with GNSS in database",
-  labelNames: ["database"],
-});
-
-const wifiLocationTotal = new Gauge({
-  name: `${prefix}wifi_locations_total`,
-  help: "Total number of wifi location entries in database",
-  labelNames: ["database"],
-});
-
-const wifiLocationNotResolvable = new Gauge({
-  name: `${prefix}wifi_locations_not_resolvable`,
-  help: "Unresolved number of wifi location entries in database",
-  labelNames: ["database"],
-});
-
-const wifiLocationRequestLimitExceeded = new Gauge({
-  name: `${prefix}wifi_locations_request_limit_exceeded`,
-  help: "Unresolved number of wifi location because request limit exceeded entries in database",
-  labelNames: ["database"],
-});
-
-const ttnGatewayReceptions = new Gauge({
-  name: `${prefix}ttn_gateway_receptions`,
-  help: "Total number of TTN Gateway receptions entries in database",
-  labelNames: ["database"],
-});
+const requestCounter = metricsService.getRequestCounter();
+const locationsTotal = metricsService.getLocationsTotal();
+const gnssLocationsTotal = metricsService.getGnssLocationsTotal()
+const wifiLocationTotal = metricsService.getWifiLocationTotal();
+const wifiLocationNotResolvable = metricsService.getWifiLocationResolvable();
+const wifiLocationRequestLimitExceeded = metricsService.getLWifiLocationRequestLimitExceeded();
+const ttnGatewayReceptions = metricsService.getTnnGatewayReceptions();
 
 // Define the metrics endpoint
 router.get("/", async (req: Request, res: Response) => {

server/src/services/metricsService.ts

@@ -0,0 +1,70 @@
+import {injectable } from "tsyringe";
+import { Counter, Gauge, collectDefaultMetrics} from "prom-client";
+
+// Collect default system metrics (e.g., CPU, memory usage)
+const prefix = 'locationhub_';
+collectDefaultMetrics({ prefix });
+
+@injectable()
+export class MetricsService {
+  constructor(
+  ) { }
+
+  public getRequestCounter() {
+    const requestCounter = new Counter({
+      name: `${prefix}http_requests_total`,
+      help: "Total number of HTTP requests",
+      labelNames: ["method", "route", "status"],
+    });
+    return requestCounter;
+  }
+
+  public getLocationsTotal() {
+    const locationsTotal = new Gauge({
+      name: `${prefix}locations_total`,
+      help: "Total number of location entries in database",
+      labelNames: ["database"],
+    });
+    return locationsTotal;
+  }
+  public getGnssLocationsTotal() {
+    const gnssLocationsTotal = new Gauge({
+      name: `${prefix}gnss_locations_total`,
+      help: "Total number of location entries with GNSS in database",
+      labelNames: ["database"],
+    });
+    return gnssLocationsTotal;
+  }
+  public getWifiLocationTotal() {
+    const wifiLocationTotal = new Gauge({
+      name: `${prefix}wifi_locations_total`,
+      help: "Total number of wifi location entries in database",
+      labelNames: ["database"],
+    });
+    return wifiLocationTotal;
+  }
+  public getWifiLocationResolvable() {
+    const wifiLocationNotResolvable = new Gauge({
+      name: `${prefix}wifi_locations_not_resolvable`,
+      help: "Unresolved number of wifi location entries in database",
+      labelNames: ["database"],
+    });
+    return wifiLocationNotResolvable;
+  }
+  public getLWifiLocationRequestLimitExceeded() {
+    const wifiLocationRequestLimitExceeded = new Gauge({
+      name: `${prefix}wifi_locations_request_limit_exceeded`,
+      help: "Unresolved number of wifi location because request limit exceeded entries in database",
+      labelNames: ["database"],
+    });
+    return wifiLocationRequestLimitExceeded;
+  }
+  public getTnnGatewayReceptions() {
+    const ttnGatewayReceptions = new Gauge({
+      name: `${prefix}ttn_gateway_receptions`,
+      help: "Total number of TTN Gateway receptions entries in database",
+      labelNames: ["database"],
+    });
+    return ttnGatewayReceptions;
+  }
+}