Merge pull request #286 from prgrms-web-devcourse-final-project/feat/#284

[Concert] 공연 상세 캐스팅 문제 해결

Author: larama-C

src/main/java/com/back/web7_9_codecrete_be/domain/concerts/dto/concert/ConcertDetailResponse.java

@@ -7,9 +7,7 @@
 import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
 import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
 import io.swagger.v3.oas.annotations.media.Schema;
-import lombok.AllArgsConstructor;
 import lombok.Getter;
-import lombok.RequiredArgsConstructor;
 import lombok.Setter;
 
 import java.time.LocalDate;

src/main/java/com/back/web7_9_codecrete_be/domain/concerts/repository/ConcertRedisRepository.java

@@ -4,6 +4,7 @@
 import com.back.web7_9_codecrete_be.domain.concerts.dto.concert.ConcertItem;
 import com.back.web7_9_codecrete_be.domain.concerts.dto.concert.ListSort;
 import com.back.web7_9_codecrete_be.domain.users.entity.User;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.data.domain.Pageable;
@@ -20,6 +21,7 @@
 public class ConcertRedisRepository {
     private final RedisTemplate<String, String> redisTemplate;
     private final RedisTemplate<String, Object> objectRedisTemplate;
+    private final ObjectMapper objectMapper;
 
     private static final String LOCK_FLAG_PREFIX = "initLoad:";
 
@@ -88,10 +90,12 @@ public ConcertDetailResponse getCachedConcertDetail(Long concertId) {
         return concertDetailResponse;
     }
 
+    // 공연 상세 정보를 Redis에서 가져오기
     private ConcertDetailResponse getConcertDetailResponse(long concertId) {
-        ConcertDetailResponse concertDetailResponse = (ConcertDetailResponse) objectRedisTemplate.opsForValue().get(CONCERT_DETAIL_PREFIX + concertId);
-        if (concertDetailResponse == null) return null;
-        return concertDetailResponse;
+        Object rawObject = objectRedisTemplate.opsForValue().get(CONCERT_DETAIL_PREFIX + concertId);
+        if (rawObject == null) return null; // null이라면 null 반환
+        if(rawObject instanceof ConcertDetailResponse) return (ConcertDetailResponse) rawObject; // ConcertDetailResponse라면 다운캐스팅
+        return objectMapper.convertValue(rawObject, ConcertDetailResponse.class); // 아니라면 매퍼 사용 클래스 변환
     }
 
     // 공연 상세 삭제