[REFACTOR] 성능 개선

src/main/java/doldol_server/doldol/rollingPaper/repository/PaperRepository.java

@@ -1,5 +1,6 @@
 package doldol_server.doldol.rollingPaper.repository;
 
+import java.time.LocalDate;
 import java.util.Optional;
 
 import org.springframework.data.jpa.repository.JpaRepository;
@@ -8,11 +9,15 @@
 
 import doldol_server.doldol.rollingPaper.entity.Paper;
 import doldol_server.doldol.rollingPaper.repository.custom.PaperRepositoryCustom;
+import feign.Param;
 
 @Repository
 public interface PaperRepository extends JpaRepository<Paper, Long>, PaperRepositoryCustom {
 	Optional<Paper> findByInvitationCode(String invitationCode);
 
 	@Query("select count(p) from Participant p where p.user.id = :userId")
 	int countByUserId(Long userId);
+
+	@Query("SELECT p.openDate FROM Paper p WHERE p.id = :paperId")
+	Optional<LocalDate> findOpenDateById(@Param("paperId") Long paperId);
 }

src/main/java/doldol_server/doldol/rollingPaper/service/MessageService.java

@@ -49,10 +49,10 @@ public MessageResponse getMessage(Long messageId, Long userId) {
 	public MessageListResponse getMessages(Long paperId, MessageType messageType, CursorPageRequest request,
 		Long userId) {
 
-		Paper paper = paperRepository.findById(paperId)
+		LocalDate openDate = paperRepository.findOpenDateById(paperId)
 			.orElseThrow(() -> new CustomException(PaperErrorCode.PAPER_NOT_FOUND));
 
-		boolean isOpened = !paper.getOpenDate().isAfter(LocalDate.now());
+		boolean isOpened = !openDate.isAfter(LocalDate.now());
 		boolean isReceiveType = messageType == MessageType.RECEIVE;
 
 		List<MessageResponse> messages = isReceiveType
@@ -81,7 +81,7 @@ public MessageListResponse getMessages(Long paperId, MessageType messageType, Cu
 	@Transactional
 	public void createMessage(CreateMessageRequest request, Long userId) {
 
-		User fromUser = userService.getById(userId);
+		User fromUser = new User(userId);
 		User toUser = userService.getById(request.receiverId());
 
 		Paper paper = paperRepository.findById(request.paperId())

src/main/java/doldol_server/doldol/rollingPaper/service/ParticipantService.java

@@ -15,7 +15,7 @@
 import doldol_server.doldol.rollingPaper.entity.Paper;
 import doldol_server.doldol.rollingPaper.entity.Participant;
 import doldol_server.doldol.rollingPaper.repository.ParticipantRepository;
-import doldol_server.doldol.user.service.UserService;
+import doldol_server.doldol.user.entity.User;
 import lombok.RequiredArgsConstructor;
 
 @Service
@@ -24,12 +24,11 @@
 public class ParticipantService {
 
 	private final ParticipantRepository participantRepository;
-	private final UserService userService;
 
 	@Transactional
 	public void addUser(Long userId, Paper paper, boolean isMaster) {
 		Participant participant = Participant.builder()
-			.user(userService.getById(userId))
+			.user(new User(userId))
 			.paper(paper)
 			.isMaster(isMaster)
 			.build();

src/main/java/doldol_server/doldol/user/entity/User.java

@@ -70,6 +70,11 @@ public User(String loginId, String name, String password, String phone,
 		this.socialType = socialType;
 	}
 
+	@Builder
+	public User(Long id) {
+		this.id = id;
+	}
+
 	public void updateSocialInfo(String socialId, SocialType socialType) {
 		this.socialId = socialId;
 		this.socialType = socialType;