fix : 레벨업 서비스 리워드 서비스 순환 참조 문제 해결 (#129)

Author: HeegangBae

backend/src/main/java/com/back/domain/level/service/LevelUpService.java

@@ -10,6 +10,7 @@
 import com.back.global.exception.CustomException;
 import com.back.global.exception.ErrorCode;
 import lombok.RequiredArgsConstructor;
+import org.springframework.context.annotation.Lazy;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -22,6 +23,8 @@ public class LevelUpService {
 
     private final MemberRepository memberRepository;
     private final LevelXPRepository levelXPRepository;
+
+    @Lazy
     private final RewardService rewardService;
 
 

backend/src/main/java/com/back/domain/reward/service/RewardService.java

@@ -9,6 +9,8 @@
 import com.back.domain.reward.entity.RewardType;
 import com.back.domain.reward.repository.RewardRepository;
 import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Lazy;
 import org.springframework.stereotype.Service;
 
 import java.util.List;
@@ -18,7 +20,10 @@
 public class RewardService {
     private  final RewardRepository rewardRepository;
     private final MemberService  memberService;
-    private final LevelUpService levelUpService;
+
+    @Lazy
+    @Autowired
+    private LevelUpService levelUpService;
 
   public void createReward (RewardType rewardType, List<RewardContent> rewardContents, int requiredValue )