modify: disconn 대신 destroy, log warning 강화

Author: Nuung

src/modules/cache/cache.type.ts

@@ -70,7 +70,7 @@ export interface ICache {
   /**
    * 캐시 서버와 연결을 끊습니다.
    */
-  disconnect(): Promise<void>;
+  destroy(): Promise<void>;
 
   /**
    * 캐시 서버와 연결되어 있는지 확인합니다.

src/modules/cache/redis.cache.ts

@@ -71,15 +71,15 @@ export class RedisCache implements ICache {
     }
   }
 
-  async disconnect(): Promise<void> {
+  async destroy(): Promise<void> {
     try {
       if (this.connected) {
-        await this.client.disconnect();
+        this.client.destroy();
         this.connected = false;
         logger.info('Redis cache connection closed');
       }
     } catch (error) {
-      logger.error('Failed to disconnect from Redis cache:', error);
+      logger.error('Failed to destroy from Redis cache:', error);
       throw error;
     }
   }
@@ -153,6 +153,7 @@ export class RedisCache implements ICache {
   async exists(key: string): Promise<boolean> {
     try {
       if (!this.connected) {
+        logger.warn('Redis not connected, skipping cache exists');
         return false;
       }
 
@@ -206,6 +207,7 @@ export class RedisCache implements ICache {
   async size(): Promise<number> {
     try {
       if (!this.connected) {
+        logger.warn('Redis not connected, skipping cache size, return 0');
         return 0;
       }