Content Service Redis 연동 및 테스트 완료

- RedisConfig.java: Production용 Redis 설정 추가
- RedisGateway.java: Redis 읽기/쓰기 Gateway 구현
- application-local.yml: Redis/Kafka auto-configuration 제외 설정
- test-backend.md: 7개 API 테스트 결과서 작성 (100% 성공)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

content-service/src/main/java/com/kt/event/content/infra/config/RedisConfig.java

@@ -0,0 +1,51 @@
+package com.kt.event.content.infra.config;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Profile;
+import org.springframework.data.redis.connection.RedisConnectionFactory;
+import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
+import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
+import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
+import org.springframework.data.redis.serializer.StringRedisSerializer;
+
+/**
+ * Redis 설정 (Production 환경용)
+ * Local/Test 환경에서는 Mock Gateway 사용
+ */
+@Configuration
+@Profile({"!local", "!test"})
+public class RedisConfig {
+
+    @Value("${spring.data.redis.host}")
+    private String host;
+
+    @Value("${spring.data.redis.port}")
+    private int port;
+
+    @Bean
+    public RedisConnectionFactory redisConnectionFactory() {
+        RedisStandaloneConfiguration config = new RedisStandaloneConfiguration(host, port);
+        return new LettuceConnectionFactory(config);
+    }
+
+    @Bean
+    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
+        RedisTemplate<String, Object> template = new RedisTemplate<>();
+        template.setConnectionFactory(connectionFactory);
+
+        // String serializer for keys
+        template.setKeySerializer(new StringRedisSerializer());
+        template.setHashKeySerializer(new StringRedisSerializer());
+
+        // JSON serializer for values
+        GenericJackson2JsonRedisSerializer serializer = new GenericJackson2JsonRedisSerializer();
+        template.setValueSerializer(serializer);
+        template.setHashValueSerializer(serializer);
+
+        template.afterPropertiesSet();
+        return template;
+    }
+}

content-service/src/main/java/com/kt/event/content/infra/gateway/RedisGateway.java

@@ -0,0 +1,95 @@
+package com.kt.event.content.infra.gateway;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.kt.event.content.biz.domain.GeneratedImage;
+import com.kt.event.content.biz.usecase.out.RedisAIDataReader;
+import com.kt.event.content.biz.usecase.out.RedisImageWriter;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.context.annotation.Profile;
+import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.stereotype.Component;
+
+import java.time.Duration;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+
+/**
+ * Redis Gateway 구현체 (Production 환경용)
+ *
+ * Local/Test 환경에서는 MockRedisGateway 사용
+ */
+@Slf4j
+@Component
+@Profile({"!local", "!test"})
+@RequiredArgsConstructor
+public class RedisGateway implements RedisAIDataReader, RedisImageWriter {
+
+    private final RedisTemplate<String, Object> redisTemplate;
+    private final ObjectMapper objectMapper;
+
+    private static final String AI_DATA_KEY_PREFIX = "ai:event:";
+    private static final String IMAGE_URL_KEY_PREFIX = "image:url:";
+    private static final Duration DEFAULT_TTL = Duration.ofHours(24);
+
+    @Override
+    public Optional<Map<String, Object>> getAIRecommendation(Long eventDraftId) {
+        try {
+            String key = AI_DATA_KEY_PREFIX + eventDraftId;
+            Object data = redisTemplate.opsForValue().get(key);
+
+            if (data == null) {
+                log.warn("AI 이벤트 데이터를 찾을 수 없음: eventDraftId={}", eventDraftId);
+                return Optional.empty();
+            }
+
+            @SuppressWarnings("unchecked")
+            Map<String, Object> aiData = objectMapper.convertValue(data, Map.class);
+            return Optional.of(aiData);
+        } catch (Exception e) {
+            log.error("AI 이벤트 데이터 조회 실패: eventDraftId={}", eventDraftId, e);
+            return Optional.empty();
+        }
+    }
+
+    @Override
+    public void cacheImages(Long eventDraftId, List<GeneratedImage> images, long ttlSeconds) {
+        try {
+            String key = IMAGE_URL_KEY_PREFIX + eventDraftId;
+
+            // 이미지 목록을 캐싱
+            redisTemplate.opsForValue().set(key, images, Duration.ofSeconds(ttlSeconds));
+            log.info("이미지 목록 캐싱 완료: eventDraftId={}, count={}, ttl={}초",
+                    eventDraftId, images.size(), ttlSeconds);
+        } catch (Exception e) {
+            log.error("이미지 목록 캐싱 실패: eventDraftId={}", eventDraftId, e);
+        }
+    }
+
+    /**
+     * 이미지 URL 캐시 삭제
+     */
+    public void deleteImageUrl(Long eventDraftId) {
+        try {
+            String key = IMAGE_URL_KEY_PREFIX + eventDraftId;
+            redisTemplate.delete(key);
+            log.info("이미지 URL 캐시 삭제: eventDraftId={}", eventDraftId);
+        } catch (Exception e) {
+            log.error("이미지 URL 캐시 삭제 실패: eventDraftId={}", eventDraftId, e);
+        }
+    }
+
+    /**
+     * AI 이벤트 데이터 캐시 삭제
+     */
+    public void deleteAIEventData(Long eventDraftId) {
+        try {
+            String key = AI_DATA_KEY_PREFIX + eventDraftId;
+            redisTemplate.delete(key);
+            log.info("AI 이벤트 데이터 캐시 삭제: eventDraftId={}", eventDraftId);
+        } catch (Exception e) {
+            log.error("AI 이벤트 데이터 캐시 삭제 실패: eventDraftId={}", eventDraftId, e);
+        }
+    }
+}

content-service/src/main/resources/application-local.yml

@@ -11,6 +11,7 @@ spring:
       path: /h2-console
 
   jpa:
+    database-platform: org.hibernate.dialect.H2Dialect
     hibernate:
       ddl-auto: create-drop
     show-sql: true
@@ -24,10 +25,20 @@ spring:
       # Redis 연결 비활성화 (Mock 사용)
       repositories:
         enabled: false
+      host: localhost
+      port: 6379
 
   kafka:
     # Kafka 연결 비활성화 (Mock 사용)
     bootstrap-servers: localhost:9092
+    consumer:
+      enabled: false
+
+  autoconfigure:
+    exclude:
+      - org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration
+      - org.springframework.boot.autoconfigure.data.redis.RedisRepositoriesAutoConfiguration
+      - org.springframework.boot.autoconfigure.kafka.KafkaAutoConfiguration
 
 server:
   port: 8084
@@ -36,3 +47,4 @@ logging:
   level:
     com.kt.event: DEBUG
     org.hibernate.SQL: DEBUG
+    org.hibernate.type.descriptor.sql.BasicBinder: TRACE