Fix #51 유니크 추가 및 post send 구현

src/main/java/com/gachtaxi/domain/chat/entity/ChattingParticipant.java

@@ -2,10 +2,7 @@
 
 import com.gachtaxi.domain.members.entity.Members;
 import com.gachtaxi.global.common.entity.BaseEntity;
-import jakarta.persistence.Column;
-import jakarta.persistence.Entity;
-import jakarta.persistence.JoinColumn;
-import jakarta.persistence.ManyToOne;
+import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
@@ -18,6 +15,12 @@
 @Entity
 @SuperBuilder
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
+@Table(
+        name = "chatting_participant",
+        uniqueConstraints = {
+                @UniqueConstraint(columnNames = {"members_id", "chatting_room_id"})
+        }
+)
 public class ChattingParticipant extends BaseEntity {
 
     @ManyToOne

src/main/java/com/gachtaxi/domain/chat/service/ChattingRoomService.java

@@ -57,13 +57,13 @@ public void delete(long chattingRoomId) {
     }
 
     @Transactional
-    public void subscribeChatRoom(long roomId, SimpMessageHeaderAccessor accessor) {
+    public void postSubscribeChatroom(SimpMessageHeaderAccessor accessor) {
+        Long roomId = (Long) accessor.getSessionAttributes().get(CHAT_ROOM_ID);
         Long senderId = (Long) accessor.getSessionAttributes().get(CHAT_USER_ID);
 
         ChattingRoom chattingRoom = find(roomId);
         Members members = memberService.findById(senderId);
 
-        accessor.getSessionAttributes().put(CHAT_ROOM_ID, roomId);
         accessor.getSessionAttributes().put(CHAT_USER_NAME, members.getNickname());
 
         if (chattingParticipantService.checkSubscription(chattingRoom, members)) {

src/main/java/com/gachtaxi/domain/chat/stomp/CustomChannelInterceptor.java

@@ -19,4 +19,11 @@ public Message<?> preSend(Message<?> message, MessageChannel channel) {
 
         return chatStrategyHandler.handle(message, accessor, channel);
     }
+
+    @Override
+    public void postSend(Message<?> message, MessageChannel channel, boolean sent) {
+        StompHeaderAccessor accessor = StompHeaderAccessor.wrap(message);
+
+        chatStrategyHandler.handle(message, accessor, channel, sent);
+    }
 }

src/main/java/com/gachtaxi/domain/chat/stomp/strategy/ChatStrategyHandler.java

@@ -25,4 +25,14 @@ public Message<?> handle(Message<?> message, StompHeaderAccessor accessor, Messa
                 .orElse(defaultCommandStrategy)
                 .preSend(message, accessor, channel);
     }
+
+    public void handle(Message<?> message, StompHeaderAccessor accessor, MessageChannel channel, boolean sent) {
+        StompCommand command = accessor.getCommand();
+
+        stompCommandStrategies.stream()
+                .filter(strategy -> strategy.supports(command))
+                .findFirst()
+                .orElse(defaultCommandStrategy)
+                .postSend(message, accessor, channel, sent);
+    }
 }

src/main/java/com/gachtaxi/domain/chat/stomp/strategy/StompCommandStrategy.java

@@ -10,4 +10,8 @@ public interface StompCommandStrategy {
     boolean supports(StompCommand command);
 
     Message<?> preSend(Message<?> message, StompHeaderAccessor accessor, MessageChannel channel);
+
+    default void postSend(Message<?> message, StompHeaderAccessor accessor, MessageChannel channel, boolean sent) {
+
+    }
 }

src/main/java/com/gachtaxi/domain/chat/stomp/strategy/StompSubscribeStrategy.java

@@ -34,7 +34,7 @@ public Message<?> preSend(Message<?> message, StompHeaderAccessor accessor, Mess
 
         if (destination.startsWith(SUB_END_POINT)) {
             Long roomId = Long.valueOf(destination.replace(SUB_END_POINT, ""));
-            chattingRoomService.subscribeChatRoom(roomId, accessor);
+            accessor.getSessionAttributes().put(CHAT_ROOM_ID, roomId);
 
             return message;
         }
@@ -45,5 +45,12 @@ public Message<?> preSend(Message<?> message, StompHeaderAccessor accessor, Mess
 
         throw new ChatSubscribeException();
     }
+
+    @Override
+    public void postSend(Message<?> message, StompHeaderAccessor accessor, MessageChannel channel, boolean sent) {
+        if (sent) {
+            chattingRoomService.postSubscribeChatroom(accessor);
+        }
+    }
 }