From 66e02868a6b886ff4470e2e53b2aa57e0702d4fd Mon Sep 17 00:00:00 2001
From: mskim <mskim@rifatron.com>
Date: Fri, 12 Dec 2025 14:08:37 +0900
Subject: [PATCH] =?UTF-8?q?Redis=20=EC=97=B0=EB=8F=99=20=EC=99=84=EB=A3=8C?=
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---
 API명세서.md                                  |  2 +-
 .../service/impl/MemoryServiceImpl.java       | 50 ++++++++++++++++---
 2 files changed, 43 insertions(+), 9 deletions(-)

diff --git a/API명세서.md b/API명세서.md
index 10f233f..bc94468 100644
--- a/API명세서.md
+++ b/API명세서.md
@@ -934,7 +934,7 @@ public class MemoryResponse {
 - ✅ `capabilities`에 `supported` 필드 추가
 - ✅ JSON-RPC 2.0 표준 준수 (정상 응답에 error 필드 제외)
 - ✅ 요청/응답 전체 로깅 기능 추가
-- ⏳ Redis 연동 (TODO)
+- ✅ Redis 연동 (임시 메모리 저장/조회 완료, TTL 3일)
 - ⏳ 벡터 검색 구현 (TODO)
 - ⏳ 배치 처리 구현 (TODO)
 
diff --git a/src/main/java/com/pandol365/dewey/domain/memory/service/impl/MemoryServiceImpl.java b/src/main/java/com/pandol365/dewey/domain/memory/service/impl/MemoryServiceImpl.java
index 0ff82fd..1119d78 100644
--- a/src/main/java/com/pandol365/dewey/domain/memory/service/impl/MemoryServiceImpl.java
+++ b/src/main/java/com/pandol365/dewey/domain/memory/service/impl/MemoryServiceImpl.java
@@ -7,11 +7,15 @@ import com.pandol365.dewey.domain.memory.service.MemoryService;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.data.domain.PageRequest;
+import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.time.Duration;
 import java.time.LocalDateTime;
+import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 import java.util.UUID;
 
 /**
@@ -24,24 +28,36 @@ import java.util.UUID;
 public class MemoryServiceImpl implements MemoryService {
     
     private final MemoryRepository memoryRepository;
-    // TODO: Redis 연동 추가 필요
-    // private final ReactiveRedisTemplate<String, TemporaryMemory> redisTemplate;
+    private final RedisTemplate<String, Object> redisTemplate;
+
+    private static final String TEMP_MEMORY_KEY_PREFIX = "tempMemory:";
+    private static final String USER_TEMP_MEMORY_KEY_PREFIX = "user:tempMemories:";
+    private static final int TEMP_TTL_DAYS = 3;
     
+    @SuppressWarnings("null")
     @Override
     public TemporaryMemory storeTemporaryMemory(String userId, String memoryText, Integer importance) {
         log.info("임시 메모리 저장: userId={}, importance={}", userId, importance);
         
-        // TODO: Redis에 저장하는 로직 구현
         TemporaryMemory temporaryMemory = TemporaryMemory.builder()
                 .id(UUID.randomUUID().toString())
                 .userId(userId)
                 .memoryText(memoryText)
                 .importance(importance != null ? importance : 1)
                 .createdAt(LocalDateTime.now())
-                .expiresAt(LocalDateTime.now().plusDays(3)) // TTL 3일
+                .expiresAt(LocalDateTime.now().plusDays(TEMP_TTL_DAYS)) // TTL 3일
                 .build();
-        
-        // TODO: redisTemplate.opsForValue().set(key, temporaryMemory, Duration.ofDays(3));
+
+        final Duration ttl = Duration.ofDays(TEMP_TTL_DAYS);
+
+        // Redis에 저장
+        String memoryKey = TEMP_MEMORY_KEY_PREFIX + temporaryMemory.getId();
+        redisTemplate.opsForValue().set(memoryKey, temporaryMemory, ttl);
+
+        // 사용자별 목록에도 추가 (시간순 정렬)
+        String userMemoriesKey = USER_TEMP_MEMORY_KEY_PREFIX + userId;
+        redisTemplate.opsForZSet().add(userMemoriesKey, memoryKey, System.currentTimeMillis());
+        redisTemplate.expire(userMemoriesKey, ttl);
         
         return temporaryMemory;
     }
@@ -51,8 +67,26 @@ public class MemoryServiceImpl implements MemoryService {
     public List<TemporaryMemory> getTemporaryMemories(String userId) {
         log.info("임시 메모리 조회: userId={}", userId);
         
-        // TODO: Redis에서 조회하는 로직 구현
-        return List.of();
+        String userMemoriesKey = USER_TEMP_MEMORY_KEY_PREFIX + userId;
+
+        Set<Object> ids = redisTemplate.opsForZSet()
+                .reverseRange(userMemoriesKey, 0, -1);
+
+        if (ids == null || ids.isEmpty()) {
+            return List.of();
+        }
+
+        List<TemporaryMemory> memories = new ArrayList<>();
+        for (Object idObj : ids) {
+            if (idObj instanceof String memoryKey) {
+                Object obj = redisTemplate.opsForValue().get(memoryKey);
+                if (obj instanceof TemporaryMemory memory) {
+                    memories.add(memory);
+                }
+            }
+        }
+
+        return memories;
     }
     
     @Override