[#26] 레디스 CacheManager 설정 (#27)

* [#26] 레디스 CacheManager 설정

- 세션과 캐쉬 레디스 분리
- 레디스 CacheManager 설정 후 빈으로 등록
- RedisConfig -> RedisSessionConfig로 naming 변경

src/main/java/com/social/instagram/config/RedisCacheManagerConfig.java

@@ -0,0 +1,48 @@
+package com.social.instagram.config;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
+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.connection.RedisStandaloneConfiguration;
+import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
+import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
+import org.springframework.data.redis.serializer.RedisSerializationContext;
+import org.springframework.data.redis.serializer.StringRedisSerializer;
+
+@Configuration
+@RequiredArgsConstructor
+public class RedisCacheManagerConfig {
+
+    @Value("${spring.redis.cache.host}")
+    private String redisHost;
+
+    @Value("${spring.redis.cache.port}")
+    private int redisPort;
+
+    @Bean
+    public RedisConnectionFactory redisCacheConnectionFactory() {
+        return new LettuceConnectionFactory(new RedisStandaloneConfiguration(redisHost, redisPort));
+    }
+
+    @Bean
+    public CacheManager redisCacheManager() {
+        return RedisCacheManager.RedisCacheManagerBuilder
+                .fromConnectionFactory(redisCacheConnectionFactory())
+                .cacheDefaults(redisCacheConfiguration())
+                .build();
+    }
+
+    private RedisCacheConfiguration redisCacheConfiguration() {
+        return RedisCacheConfiguration.defaultCacheConfig()
+                .serializeKeysWith(
+                        RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
+                .serializeValuesWith(
+                        RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));
+    }
+
+}