From d4ff107c4dbaaa87b630486cba841e323bbedba0 Mon Sep 17 00:00:00 2001
From: Enemuo-debug <chimzuruoke2017@gmail.com>
Date: Fri, 26 Jun 2026 17:35:57 +0100
Subject: [PATCH] fix: Ensure singleton DI for CacheMetricsInterceptor

---
 src/cache/cache-metrics.interceptor.ts | 1 +
 src/main.ts                            | 5 +++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/cache/cache-metrics.interceptor.ts b/src/cache/cache-metrics.interceptor.ts
index 9f511b6c..b946d0ce 100644
--- a/src/cache/cache-metrics.interceptor.ts
+++ b/src/cache/cache-metrics.interceptor.ts
@@ -12,6 +12,7 @@ import { CacheMonitoringService } from './cache-monitoring.service';
 
 @Injectable()
 export class CacheMetricsInterceptor implements NestInterceptor {
+  // CacheMonitoringService is expected to be a singleton provided by the CacheModule
   constructor(private cacheMonitoringService: CacheMonitoringService) {}
 
   intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
diff --git a/src/main.ts b/src/main.ts
index 440e6e49..705457bb 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -49,8 +49,9 @@ async function bootstrap() {
   app.useGlobalInterceptors(new RateLimitHeadersInterceptor());
 
   // Apply cache metrics interceptor
-  const cacheMonitoringService = app.get(CacheMonitoringService);
-  app.useGlobalInterceptors(new CacheMetricsInterceptor(cacheMonitoringService));
+  // Retrieve the singleton instance from the DI container to ensure consistent dependency injection
+  const cacheMetricsInterceptor = app.get(CacheMetricsInterceptor);
+  app.useGlobalInterceptors(cacheMetricsInterceptor);
 
   app.useGlobalPipes(
     new ValidationPipe({