[BE] refactor: 채팅 패키지 분리 (#731)

backend/src/main/java/com/happy/friendogly/chat/controller/ChatMessageController.java → backend/src/main/java/com/happy/friendogly/chatmessage/controller/ChatMessageController.java

@@ -1,9 +1,9 @@
-package com.happy.friendogly.chat.controller;
+package com.happy.friendogly.chatmessage.controller;
 
 import com.happy.friendogly.auth.Auth;
-import com.happy.friendogly.chat.dto.request.FindMessagesByTimeRangeRequest;
-import com.happy.friendogly.chat.dto.response.FindChatMessagesResponse;
-import com.happy.friendogly.chat.service.ChatQueryService;
+import com.happy.friendogly.chatmessage.dto.request.FindMessagesByTimeRangeRequest;
+import com.happy.friendogly.chatmessage.dto.response.FindChatMessagesResponse;
+import com.happy.friendogly.chatmessage.service.ChatMessageQueryService;
 import com.happy.friendogly.common.ApiResponse;
 import jakarta.validation.Valid;
 import java.util.List;
@@ -16,10 +16,10 @@
 @RequestMapping("/chat-messages")
 public class ChatMessageController {
 
-    private final ChatQueryService chatQueryService;
+    private final ChatMessageQueryService chatMessageQueryService;
 
-    public ChatMessageController(ChatQueryService chatQueryService) {
-        this.chatQueryService = chatQueryService;
+    public ChatMessageController(ChatMessageQueryService chatMessageQueryService) {
+        this.chatMessageQueryService = chatMessageQueryService;
     }
 
     // TODO: 전체 조회 API 필요성 논의 필요, 만약 필요하다면 페이징을 통한 성능 개선 필요
@@ -28,7 +28,7 @@ public ApiResponse<List<FindChatMessagesResponse>> findAllByChatRoomId(
             @Auth Long memberId,
             @PathVariable("chatRoomId") Long chatRoomId
     ) {
-        return ApiResponse.ofSuccess(chatQueryService.findAllByChatRoomId(memberId, chatRoomId));
+        return ApiResponse.ofSuccess(chatMessageQueryService.findAllByChatRoomId(memberId, chatRoomId));
     }
 
     @GetMapping("/{chatRoomId}/times")
@@ -37,6 +37,6 @@ public ApiResponse<List<FindChatMessagesResponse>> findAllByTimeRange(
             @Valid FindMessagesByTimeRangeRequest request,
             @PathVariable("chatRoomId") Long chatRoomId
     ) {
-        return ApiResponse.ofSuccess(chatQueryService.findByTimeRange(memberId, chatRoomId, request));
+        return ApiResponse.ofSuccess(chatMessageQueryService.findByTimeRange(memberId, chatRoomId, request));
     }
 }

backend/src/main/java/com/happy/friendogly/chat/domain/ChatMessage.java → backend/src/main/java/com/happy/friendogly/chatmessage/domain/ChatMessage.java

@@ -1,5 +1,7 @@
-package com.happy.friendogly.chat.domain;
+package com.happy.friendogly.chatmessage.domain;
 
+import com.happy.friendogly.chatsocket.domain.MessageType;
+import com.happy.friendogly.chatroom.domain.ChatRoom;
 import com.happy.friendogly.member.domain.Member;
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;

backend/src/main/java/com/happy/friendogly/chat/dto/request/FindMessagesByTimeRangeRequest.java → backend/src/main/java/com/happy/friendogly/chatmessage/dto/request/FindMessagesByTimeRangeRequest.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.dto.request;
+package com.happy.friendogly.chatmessage.dto.request;
 
 import jakarta.validation.constraints.Past;
 import java.time.LocalDateTime;

backend/src/main/java/com/happy/friendogly/chat/dto/response/FindChatMessagesResponse.java → backend/src/main/java/com/happy/friendogly/chatmessage/dto/response/FindChatMessagesResponse.java

@@ -1,7 +1,7 @@
-package com.happy.friendogly.chat.dto.response;
+package com.happy.friendogly.chatmessage.dto.response;
 
-import com.happy.friendogly.chat.domain.ChatMessage;
-import com.happy.friendogly.chat.domain.MessageType;
+import com.happy.friendogly.chatmessage.domain.ChatMessage;
+import com.happy.friendogly.chatsocket.domain.MessageType;
 import java.time.LocalDateTime;
 
 public record FindChatMessagesResponse(

backend/src/main/java/com/happy/friendogly/chat/repository/ChatMessageRepository.java → backend/src/main/java/com/happy/friendogly/chatmessage/repository/ChatMessageRepository.java

@@ -1,6 +1,6 @@
-package com.happy.friendogly.chat.repository;
+package com.happy.friendogly.chatmessage.repository;
 
-import com.happy.friendogly.chat.domain.ChatMessage;
+import com.happy.friendogly.chatmessage.domain.ChatMessage;
 import java.time.LocalDateTime;
 import java.util.List;
 import org.springframework.data.jpa.repository.EntityGraph;

backend/src/main/java/com/happy/friendogly/chat/service/ChatQueryService.java → backend/src/main/java/com/happy/friendogly/chatmessage/service/ChatMessageQueryService.java

@@ -1,13 +1,13 @@
-package com.happy.friendogly.chat.service;
+package com.happy.friendogly.chatmessage.service;
 
 import static org.springframework.http.HttpStatus.FORBIDDEN;
 
-import com.happy.friendogly.chat.domain.ChatMessage;
-import com.happy.friendogly.chat.domain.ChatRoom;
-import com.happy.friendogly.chat.dto.request.FindMessagesByTimeRangeRequest;
-import com.happy.friendogly.chat.dto.response.FindChatMessagesResponse;
-import com.happy.friendogly.chat.repository.ChatMessageRepository;
-import com.happy.friendogly.chat.repository.ChatRoomRepository;
+import com.happy.friendogly.chatmessage.domain.ChatMessage;
+import com.happy.friendogly.chatroom.domain.ChatRoom;
+import com.happy.friendogly.chatmessage.dto.request.FindMessagesByTimeRangeRequest;
+import com.happy.friendogly.chatmessage.dto.response.FindChatMessagesResponse;
+import com.happy.friendogly.chatmessage.repository.ChatMessageRepository;
+import com.happy.friendogly.chatroom.repository.ChatRoomRepository;
 import com.happy.friendogly.exception.FriendoglyException;
 import com.happy.friendogly.member.domain.Member;
 import com.happy.friendogly.member.repository.MemberRepository;
@@ -18,13 +18,13 @@
 
 @Service
 @Transactional(readOnly = true)
-public class ChatQueryService {
+public class ChatMessageQueryService {
 
     private final ChatMessageRepository chatMessageRepository;
     private final MemberRepository memberRepository;
     private final ChatRoomRepository chatRoomRepository;
 
-    public ChatQueryService(
+    public ChatMessageQueryService(
             ChatMessageRepository chatMessageRepository,
             MemberRepository memberRepository,
             ChatRoomRepository chatRoomRepository

backend/src/main/java/com/happy/friendogly/chat/controller/ChatRoomController.java → backend/src/main/java/com/happy/friendogly/chatroom/controller/ChatRoomController.java

@@ -1,13 +1,13 @@
-package com.happy.friendogly.chat.controller;
+package com.happy.friendogly.chatroom.controller;
 
 import com.happy.friendogly.auth.Auth;
-import com.happy.friendogly.chat.dto.request.SaveChatRoomRequest;
-import com.happy.friendogly.chat.dto.response.FindChatRoomMembersInfoResponse;
-import com.happy.friendogly.chat.dto.response.FindClubDetailsResponse;
-import com.happy.friendogly.chat.dto.response.FindMyChatRoomResponse;
-import com.happy.friendogly.chat.dto.response.SaveChatRoomResponse;
-import com.happy.friendogly.chat.service.ChatRoomCommandService;
-import com.happy.friendogly.chat.service.ChatRoomQueryService;
+import com.happy.friendogly.chatroom.dto.request.SaveChatRoomRequest;
+import com.happy.friendogly.chatroom.dto.response.FindChatRoomMembersInfoResponse;
+import com.happy.friendogly.chatroom.dto.response.FindClubDetailsResponse;
+import com.happy.friendogly.chatroom.dto.response.FindMyChatRoomResponse;
+import com.happy.friendogly.chatroom.dto.response.SaveChatRoomResponse;
+import com.happy.friendogly.chatroom.service.ChatRoomCommandService;
+import com.happy.friendogly.chatroom.service.ChatRoomQueryService;
 import com.happy.friendogly.common.ApiResponse;
 import java.util.List;
 import org.springframework.web.bind.annotation.GetMapping;

backend/src/main/java/com/happy/friendogly/chat/domain/ChatRoom.java → backend/src/main/java/com/happy/friendogly/chatroom/domain/ChatRoom.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.domain;
+package com.happy.friendogly.chatroom.domain;
 
 import com.happy.friendogly.exception.FriendoglyException;
 import com.happy.friendogly.member.domain.Member;

backend/src/main/java/com/happy/friendogly/chat/domain/ChatRoomMember.java → backend/src/main/java/com/happy/friendogly/chatroom/domain/ChatRoomMember.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.domain;
+package com.happy.friendogly.chatroom.domain;
 
 import com.happy.friendogly.member.domain.Member;
 import jakarta.persistence.Entity;

backend/src/main/java/com/happy/friendogly/chat/domain/ChatRoomType.java → backend/src/main/java/com/happy/friendogly/chatroom/domain/ChatRoomType.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.domain;
+package com.happy.friendogly.chatroom.domain;
 
 public enum ChatRoomType {
 

backend/src/main/java/com/happy/friendogly/chat/domain/MemberCapacity.java → backend/src/main/java/com/happy/friendogly/chatroom/domain/MemberCapacity.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.domain;
+package com.happy.friendogly.chatroom.domain;
 
 import com.happy.friendogly.exception.FriendoglyException;
 import jakarta.persistence.Column;

backend/src/main/java/com/happy/friendogly/chat/dto/request/InviteToChatRoomRequest.java → backend/src/main/java/com/happy/friendogly/chatroom/dto/request/InviteToChatRoomRequest.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.dto.request;
+package com.happy.friendogly.chatroom.dto.request;
 
 public record InviteToChatRoomRequest(
         Long receiverMemberId,

backend/src/main/java/com/happy/friendogly/chat/dto/request/SaveChatRoomRequest.java → backend/src/main/java/com/happy/friendogly/chatroom/dto/request/SaveChatRoomRequest.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.dto.request;
+package com.happy.friendogly.chatroom.dto.request;
 
 public record SaveChatRoomRequest(Long otherMemberId) {
 

backend/src/main/java/com/happy/friendogly/chat/dto/response/ChatRoomDetail.java → backend/src/main/java/com/happy/friendogly/chatroom/dto/response/ChatRoomDetail.java

@@ -1,6 +1,6 @@
-package com.happy.friendogly.chat.dto.response;
+package com.happy.friendogly.chatroom.dto.response;
 
-import com.happy.friendogly.chat.domain.ChatRoom;
+import com.happy.friendogly.chatroom.domain.ChatRoom;
 
 public record ChatRoomDetail(
         Long chatRoomId,

backend/src/main/java/com/happy/friendogly/chat/dto/response/FindChatRoomMembersInfoResponse.java → backend/src/main/java/com/happy/friendogly/chatroom/dto/response/FindChatRoomMembersInfoResponse.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.dto.response;
+package com.happy.friendogly.chatroom.dto.response;
 
 import com.happy.friendogly.member.domain.Member;
 

backend/src/main/java/com/happy/friendogly/chat/dto/response/FindClubDetailsResponse.java → backend/src/main/java/com/happy/friendogly/chatroom/dto/response/FindClubDetailsResponse.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.dto.response;
+package com.happy.friendogly.chatroom.dto.response;
 
 import com.happy.friendogly.club.domain.Club;
 import com.happy.friendogly.pet.domain.Gender;

backend/src/main/java/com/happy/friendogly/chat/dto/response/FindMyChatRoomResponse.java → backend/src/main/java/com/happy/friendogly/chatroom/dto/response/FindMyChatRoomResponse.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.dto.response;
+package com.happy.friendogly.chatroom.dto.response;
 
 import java.util.List;
 

backend/src/main/java/com/happy/friendogly/chat/dto/response/InviteToChatRoomResponse.java → backend/src/main/java/com/happy/friendogly/chatroom/dto/response/InviteToChatRoomResponse.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.dto.response;
+package com.happy.friendogly.chatroom.dto.response;
 
 public record InviteToChatRoomResponse(Long chatRoomId) {
 

backend/src/main/java/com/happy/friendogly/chat/dto/response/SaveChatRoomResponse.java → backend/src/main/java/com/happy/friendogly/chatroom/dto/response/SaveChatRoomResponse.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.dto.response;
+package com.happy.friendogly.chatroom.dto.response;
 
 public record SaveChatRoomResponse(Long chatRoomId) {
 

backend/src/main/java/com/happy/friendogly/chat/repository/ChatRoomMemberRepository.java → backend/src/main/java/com/happy/friendogly/chatroom/repository/ChatRoomMemberRepository.java

@@ -1,6 +1,6 @@
-package com.happy.friendogly.chat.repository;
+package com.happy.friendogly.chatroom.repository;
 
-import com.happy.friendogly.chat.domain.ChatRoomMember;
+import com.happy.friendogly.chatroom.domain.ChatRoomMember;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface ChatRoomMemberRepository extends JpaRepository<ChatRoomMember, Long> {

backend/src/main/java/com/happy/friendogly/chat/repository/ChatRoomRepository.java → backend/src/main/java/com/happy/friendogly/chatroom/repository/ChatRoomRepository.java

@@ -1,6 +1,6 @@
-package com.happy.friendogly.chat.repository;
+package com.happy.friendogly.chatroom.repository;
 
-import com.happy.friendogly.chat.domain.ChatRoom;
+import com.happy.friendogly.chatroom.domain.ChatRoom;
 import com.happy.friendogly.exception.FriendoglyException;
 import java.util.List;
 import org.springframework.data.jpa.repository.JpaRepository;

backend/src/main/java/com/happy/friendogly/chat/service/ChatRoomCommandService.java → backend/src/main/java/com/happy/friendogly/chatroom/service/ChatRoomCommandService.java

@@ -1,9 +1,10 @@
-package com.happy.friendogly.chat.service;
+package com.happy.friendogly.chatroom.service;
 
-import com.happy.friendogly.chat.domain.ChatRoom;
-import com.happy.friendogly.chat.dto.request.SaveChatRoomRequest;
-import com.happy.friendogly.chat.dto.response.SaveChatRoomResponse;
-import com.happy.friendogly.chat.repository.ChatRoomRepository;
+import com.happy.friendogly.chatroom.domain.ChatRoom;
+import com.happy.friendogly.chatroom.dto.request.SaveChatRoomRequest;
+import com.happy.friendogly.chatroom.dto.response.SaveChatRoomResponse;
+import com.happy.friendogly.chatroom.repository.ChatRoomRepository;
+import com.happy.friendogly.chatsocket.service.ChatSocketCommandService;
 import com.happy.friendogly.member.domain.Member;
 import com.happy.friendogly.member.repository.MemberRepository;
 import java.util.List;
@@ -18,16 +19,16 @@ public class ChatRoomCommandService {
     private final ChatRoomRepository chatRoomRepository;
     private final MemberRepository memberRepository;
 
-    private final ChatCommandService chatCommandService;
+    private final ChatSocketCommandService chatSocketCommandService;
 
     public ChatRoomCommandService(
             ChatRoomRepository chatRoomRepository,
             MemberRepository memberRepository,
-            ChatCommandService chatCommandService
+            ChatSocketCommandService chatSocketCommandService
     ) {
         this.chatRoomRepository = chatRoomRepository;
         this.memberRepository = memberRepository;
-        this.chatCommandService = chatCommandService;
+        this.chatSocketCommandService = chatSocketCommandService;
     }
 
     public SaveChatRoomResponse savePrivate(Long memberId, SaveChatRoomRequest request) {
@@ -52,6 +53,6 @@ public void leave(Long memberId, Long chatRoomId) {
         Member member = memberRepository.getById(memberId);
         chatRoom.removeMember(member);
 
-        chatCommandService.sendLeave(memberId, chatRoomId);
+        chatSocketCommandService.sendLeave(memberId, chatRoomId);
     }
 }

backend/src/main/java/com/happy/friendogly/chat/service/ChatRoomQueryService.java → backend/src/main/java/com/happy/friendogly/chatroom/service/ChatRoomQueryService.java

@@ -1,12 +1,12 @@
-package com.happy.friendogly.chat.service;
+package com.happy.friendogly.chatroom.service;
 
-import com.happy.friendogly.chat.domain.ChatRoom;
-import com.happy.friendogly.chat.dto.request.InviteToChatRoomRequest;
-import com.happy.friendogly.chat.dto.response.ChatRoomDetail;
-import com.happy.friendogly.chat.dto.response.FindChatRoomMembersInfoResponse;
-import com.happy.friendogly.chat.dto.response.FindClubDetailsResponse;
-import com.happy.friendogly.chat.dto.response.FindMyChatRoomResponse;
-import com.happy.friendogly.chat.repository.ChatRoomRepository;
+import com.happy.friendogly.chatroom.domain.ChatRoom;
+import com.happy.friendogly.chatroom.dto.request.InviteToChatRoomRequest;
+import com.happy.friendogly.chatroom.dto.response.ChatRoomDetail;
+import com.happy.friendogly.chatroom.dto.response.FindChatRoomMembersInfoResponse;
+import com.happy.friendogly.chatroom.dto.response.FindClubDetailsResponse;
+import com.happy.friendogly.chatroom.dto.response.FindMyChatRoomResponse;
+import com.happy.friendogly.chatroom.repository.ChatRoomRepository;
 import com.happy.friendogly.club.domain.Club;
 import com.happy.friendogly.club.repository.ClubRepository;
 import com.happy.friendogly.exception.FriendoglyException;

backend/src/main/java/com/happy/friendogly/config/RabbitMqConfig.java → backend/src/main/java/com/happy/friendogly/chatsocket/config/RabbitMqConfig.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.config;
+package com.happy.friendogly.chatsocket.config;
 
 import com.fasterxml.jackson.databind.Module;
 import com.fasterxml.jackson.databind.ObjectMapper;

backend/src/main/java/com/happy/friendogly/config/WebSocketErrorHandler.java → backend/src/main/java/com/happy/friendogly/chatsocket/config/WebSocketErrorHandler.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.config;
+package com.happy.friendogly.chatsocket.config;
 
 import static com.happy.friendogly.common.ErrorCode.DEFAULT_ERROR_CODE;
 import static org.springframework.messaging.simp.stomp.StompCommand.ERROR;

backend/src/main/java/com/happy/friendogly/config/WebSocketInterceptor.java → backend/src/main/java/com/happy/friendogly/chatsocket/config/WebSocketInterceptor.java

@@ -1,12 +1,12 @@
-package com.happy.friendogly.config;
+package com.happy.friendogly.chatsocket.config;
 
 import static org.springframework.http.HttpHeaders.AUTHORIZATION;
 import static org.springframework.messaging.simp.stomp.StompCommand.SUBSCRIBE;
 
 import com.happy.friendogly.auth.service.jwt.JwtProvider;
-import com.happy.friendogly.chat.domain.ChatRoom;
-import com.happy.friendogly.chat.repository.ChatRoomMemberRepository;
-import com.happy.friendogly.chat.repository.ChatRoomRepository;
+import com.happy.friendogly.chatroom.domain.ChatRoom;
+import com.happy.friendogly.chatroom.repository.ChatRoomMemberRepository;
+import com.happy.friendogly.chatroom.repository.ChatRoomRepository;
 import com.happy.friendogly.club.repository.ClubRepository;
 import com.happy.friendogly.exception.FriendoglyException;
 import com.happy.friendogly.exception.FriendoglyWebSocketException;

backend/src/main/java/com/happy/friendogly/config/WebSocketLocalConfig.java → backend/src/main/java/com/happy/friendogly/chatsocket/config/WebSocketLocalConfig.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.config;
+package com.happy.friendogly.chatsocket.config;
 
 import com.happy.friendogly.auth.WebSocketArgumentResolver;
 import com.happy.friendogly.auth.service.jwt.JwtProvider;

backend/src/main/java/com/happy/friendogly/config/WebSocketRabbitMqConfig.java → backend/src/main/java/com/happy/friendogly/chatsocket/config/WebSocketRabbitMqConfig.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.config;
+package com.happy.friendogly.chatsocket.config;
 
 import com.happy.friendogly.auth.WebSocketArgumentResolver;
 import com.happy.friendogly.auth.service.jwt.JwtProvider;

backend/src/main/java/com/happy/friendogly/chat/controller/ChatSocketController.java → backend/src/main/java/com/happy/friendogly/chatsocket/controller/ChatSocketController.java

@@ -1,11 +1,10 @@
-package com.happy.friendogly.chat.controller;
+package com.happy.friendogly.chatsocket.controller;
 
 import com.happy.friendogly.auth.WebSocketAuth;
-import com.happy.friendogly.chat.dto.request.ChatMessageSocketRequest;
-import com.happy.friendogly.chat.dto.request.InviteToChatRoomRequest;
-import com.happy.friendogly.chat.dto.response.InviteToChatRoomResponse;
-import com.happy.friendogly.chat.service.ChatCommandService;
-import com.happy.friendogly.chat.service.ChatRoomQueryService;
+import com.happy.friendogly.chatsocket.dto.request.ChatMessageSocketRequest;
+import com.happy.friendogly.chatroom.dto.request.InviteToChatRoomRequest;
+import com.happy.friendogly.chatsocket.service.ChatSocketCommandService;
+import com.happy.friendogly.chatroom.service.ChatRoomQueryService;
 import com.happy.friendogly.common.ApiResponse;
 import com.happy.friendogly.common.ErrorCode;
 import com.happy.friendogly.common.ErrorResponse;
@@ -21,14 +20,14 @@
 @RestController
 public class ChatSocketController {
 
-    private final ChatCommandService chatCommandService;
+    private final ChatSocketCommandService chatSocketCommandService;
     private final ChatRoomQueryService chatRoomQueryService;
 
     public ChatSocketController(
-            ChatCommandService chatCommandService,
+            ChatSocketCommandService chatSocketCommandService,
             ChatRoomQueryService chatRoomQueryService
     ) {
-        this.chatCommandService = chatCommandService;
+        this.chatSocketCommandService = chatSocketCommandService;
         this.chatRoomQueryService = chatRoomQueryService;
     }
 
@@ -50,7 +49,7 @@ public void sendMessage(
             @DestinationVariable(value = "chatRoomId") Long chatRoomId,
             @Payload ChatMessageSocketRequest request
     ) {
-        chatCommandService.sendChat(memberId, chatRoomId, request);
+        chatSocketCommandService.sendChat(memberId, chatRoomId, request);
     }
 
     @MessageExceptionHandler

backend/src/main/java/com/happy/friendogly/chat/domain/MessageType.java → backend/src/main/java/com/happy/friendogly/chatsocket/domain/MessageType.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.domain;
+package com.happy.friendogly.chatsocket.domain;
 
 public enum MessageType {
 

backend/src/main/java/com/happy/friendogly/chat/dto/request/ChatMessageSocketRequest.java → backend/src/main/java/com/happy/friendogly/chatsocket/dto/request/ChatMessageSocketRequest.java

@@ -1,4 +1,4 @@
-package com.happy.friendogly.chat.dto.request;
+package com.happy.friendogly.chatsocket.dto.request;
 
 public record ChatMessageSocketRequest(String content) {