Feat: RedisCache를 통한 캐싱 적용 (#44)

build.gradle

@@ -49,6 +49,9 @@ dependencies {
 	// Jwt dependency
 	implementation 'org.mybatis.spring.boot:mybatis-spring-boot-starter:2.2.2'      // Spring Boot MyBatis
 	implementation "io.jsonwebtoken:jjwt:0.9.1"
+
+	// Redis dependency
+	implementation 'org.springframework.boot:spring-boot-starter-data-redis'
 }
 
 tasks.named('test') {

src/main/java/com/diareat/diareat/DiareatApplication.java

@@ -2,7 +2,9 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cache.annotation.EnableCaching;
 
+@EnableCaching
 @SpringBootApplication
 public class DiareatApplication {
 

src/main/java/com/diareat/diareat/config/RedisCacheConfig.java

@@ -0,0 +1,26 @@
+package com.diareat.diareat.config;
+
+import org.springframework.cache.CacheManager;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.redis.cache.RedisCacheConfiguration;
+import org.springframework.data.redis.cache.RedisCacheManager;
+import org.springframework.data.redis.connection.RedisConnectionFactory;
+import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
+import org.springframework.data.redis.serializer.RedisSerializationContext;
+import org.springframework.data.redis.serializer.StringRedisSerializer;
+
+import java.time.Duration;
+
+@Configuration
+public class RedisCacheConfig { // Redis Cache 설정
+
+    @Bean
+    public CacheManager diareatCacheManager(RedisConnectionFactory cf) {
+        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
+                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
+                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()))
+                .entryTtl(Duration.ofMinutes(3L)); // 캐시 만료 시간 3분
+        return RedisCacheManager.RedisCacheManagerBuilder.fromConnectionFactory(cf).cacheDefaults(redisCacheConfiguration).build();
+    }
+}

src/main/java/com/diareat/diareat/user/service/UserService.java

@@ -10,6 +10,8 @@
 import com.diareat.diareat.util.api.ResponseCode;
 import com.diareat.diareat.util.exception.UserException;
 import lombok.RequiredArgsConstructor;
+import org.springframework.cache.annotation.CacheEvict;
+import org.springframework.cache.annotation.Cacheable;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -40,6 +42,7 @@ public Long saveUser(CreateUserDto createUserDto) {
     }
 
     // 회원 기본정보 조회
+    @Cacheable(value = "ResponseSimpleUserDto", key = "#userId", cacheManager = "diareatCacheManager")
     @Transactional(readOnly = true)
     public ResponseSimpleUserDto getSimpleUserInfo(Long userId) {
         User user = getUserById(userId);
@@ -48,13 +51,15 @@ public ResponseSimpleUserDto getSimpleUserInfo(Long userId) {
     }
 
     // 회원정보 조회
+    @Cacheable(value = "ResponseUserDto", key = "#userId", cacheManager = "diareatCacheManager")
     @Transactional(readOnly = true)
     public ResponseUserDto getUserInfo(Long userId) {
         User user = getUserById(userId);
         return ResponseUserDto.from(user);
     }
 
     // 회원정보 수정
+    @CacheEvict(value = {"ResponseSimpleUserDto", "ResponseUserDto"}, key = "#updateUserDto.userId", cacheManager = "diareatCacheManager")
     @Transactional
     public void updateUserInfo(UpdateUserDto updateUserDto) {
         User user = getUserById(updateUserDto.getUserId());
@@ -63,6 +68,7 @@ public void updateUserInfo(UpdateUserDto updateUserDto) {
     }
 
     // 회원 기준섭취량 조회
+    @Cacheable(value = "ResponseUserNutritionDto", key = "#userId", cacheManager = "diareatCacheManager")
     @Transactional(readOnly = true)
     public ResponseUserNutritionDto getUserNutrition(Long userId) {
         User user = getUserById(userId);
@@ -71,6 +77,7 @@ public ResponseUserNutritionDto getUserNutrition(Long userId) {
     }
 
     // 회원 기준섭취량 직접 수정
+    @CacheEvict(value = "ResponseUserNutritionDto", key = "#updateUserNutritionDto.userId", cacheManager = "diareatCacheManager")
     @Transactional
     public void updateBaseNutrition(UpdateUserNutritionDto updateUserNutritionDto) {
         User user = getUserById(updateUserNutritionDto.getUserId());
@@ -80,13 +87,14 @@ public void updateBaseNutrition(UpdateUserNutritionDto updateUserNutritionDto) {
     }
 
     // 회원 탈퇴
+    @CacheEvict(value = {"ResponseSimpleUserDto", "ResponseUserDto", "ResponseUserNutritionDto"}, key = "#userId", cacheManager = "diareatCacheManager")
     @Transactional
     public void deleteUser(Long userId) {
         validateUser(userId);
         userRepository.deleteById(userId);
     }
 
-    // 회원의 친구 검색 결과 조회
+    // 회원의 친구 검색 결과 조회 -> 검색 및 팔로우는 굉장히 돌발적으로 이루어질 가능성이 높아 캐시 적용 X
     @Transactional(readOnly = true)
     public List<ResponseSearchUserDto> searchUser(Long hostId, String name) {
         validateUser(hostId);
@@ -118,15 +126,6 @@ public void unfollowUser(Long userId, Long unfollowId) {
         followRepository.delete(Follow.makeFollow(userId, unfollowId));
     }
 
-    // 회원의 팔로우 목록 조회 (현재 외부 Dto 변환은 Food에서 위임받아 진행할지 협의하지 않았기에 일단 User 리스트로 반환)
-    @Transactional(readOnly = true)
-    public List<User> getFollowList(Long userId) {
-        validateUser(userId);
-        List<User> users = followRepository.findAllByFromUser(userId);
-        users.add(getUserById(userId)); // 자기 자신도 랭킹에 포함
-        return users;
-    }
-
     private void validateUser(Long userId) {
         if (!userRepository.existsById(userId))
             throw new UserException(ResponseCode.USER_NOT_FOUND);
@@ -136,4 +135,4 @@ private User getUserById(Long userId) {
         return userRepository.findById(userId)
                 .orElseThrow(() -> new UserException(ResponseCode.USER_NOT_FOUND));
     }
-}
+}

src/main/resources/application.properties

@@ -2,4 +2,9 @@
 spring.profiles.include = db
 
 # swagger
-spring.mvc.pathmatch.matching-strategy=ant_path_matcher
+spring.mvc.pathmatch.matching-strategy=ant_path_matcher
+
+# redis
+spring.redis.serializer=org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer
+spring.cache.type=redis
+spring.cache.redis.cache-null-values=true