feat: store recently viewed product using list

src/main/java/co/orange/ddanzi/global/redis/RedisRepositoryImpl.java

@@ -4,14 +4,18 @@
 import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
 import java.util.Set;
+import java.util.concurrent.TimeUnit;
 
 
 @Slf4j
 @Repository
 public class RedisRepositoryImpl implements RedisRepository {
 
     private static final String DEVICE_PREFIX = "device:";
+    private static final long MAX_RECENT_PRODUCTS = 12;
+    private static final long EXPIRATION_TIME = 10 * 24 * 60 * 60; // 10일
 
     private final RedisTemplate<String, String> redisTemplate;
 
@@ -20,17 +24,22 @@ public RedisRepositoryImpl(RedisTemplate<String, String> redisTemplate) {
     }
 
     @Override
-    public void saveDeviceToken(String deviceToken, String productId) {
-        redisTemplate.opsForSet().add(DEVICE_PREFIX + deviceToken, productId);
+    public void saveRecentProduct(String deviceToken, String productId) {
+        String key = DEVICE_PREFIX + deviceToken;
+        redisTemplate.opsForList().leftPush(key, productId);
+        redisTemplate.opsForList().trim(key, 0, MAX_RECENT_PRODUCTS - 1); // 리스트 길이 제한
+        redisTemplate.expire(key, EXPIRATION_TIME, TimeUnit.SECONDS);
+
     }
 
     @Override
-    public Set<String> getRecentProducts(String deviceToken) {
-        return redisTemplate.opsForSet().members(DEVICE_PREFIX + deviceToken);
+    public List<String> getRecentProducts(String deviceToken) {
+        String key = DEVICE_PREFIX + deviceToken;
+        return redisTemplate.opsForList().range(key, 0, -1);
     }
 
     @Override
-    public void deleteDeviceToken(String deviceToken) {
+    public void deleteRecentProduct(String deviceToken) {
         redisTemplate.delete(DEVICE_PREFIX + deviceToken);
     }
 }