Merge remote-tracking branch 'origin/dev' into refactor/163

# Conflicts:
#	backend/src/main/java/io/f1/backend/domain/game/app/RoomService.java
#	backend/src/main/java/io/f1/backend/domain/game/websocket/controller/GameSocketController.java
#	backend/src/main/java/io/f1/backend/domain/game/websocket/eventlistener/WebsocketEventListener.java

Author: sehee123

backend/build.gradle

@@ -37,6 +37,8 @@ dependencies {
 
 	/* DATABASE */
 	runtimeOnly 'com.mysql:mysql-connector-j'
+	implementation 'org.flywaydb:flyway-mysql'
+	implementation 'org.flywaydb:flyway-core'
 
 	/* MONITORING */
 	implementation 'io.micrometer:micrometer-registry-prometheus'

backend/src/main/java/io/f1/backend/BackendApplication.java

@@ -6,7 +6,9 @@
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
+import org.springframework.scheduling.annotation.EnableScheduling;
 
+@EnableScheduling
 @EnableJpaAuditing
 @SpringBootApplication
 @EnableConfigurationProperties(OAuthRedirectProperties.class)

backend/src/main/java/io/f1/backend/domain/game/app/ChatService.java

@@ -20,7 +20,6 @@
 public class ChatService {
 
     private final RoomService roomService;
-    private final TimerService timerService;
     private final MessageSender messageSender;
     private final ApplicationEventPublisher eventPublisher;
 
@@ -41,7 +40,12 @@ public void chat(Long roomId, UserPrincipal userPrincipal, ChatMessage chatMessa
 
         String answer = currentQuestion.getAnswer();
 
-        if (answer.equals(chatMessage.message())) {
+        if (!answer.equals(chatMessage.message())) {
+            return;
+        }
+
+        // false -> true
+        if (room.compareAndSetAnsweredFlag(false, true)) {
             eventPublisher.publishEvent(
                     new GameCorrectAnswerEvent(
                             room, userPrincipal.getUserId(), chatMessage, answer));

backend/src/main/java/io/f1/backend/domain/game/app/GameService.java

@@ -123,6 +123,7 @@ public void onCorrectAnswer(GameCorrectAnswerEvent event) {
                 ofPlayerEvent(chatMessage.nickname(), RoomEventType.CORRECT_ANSWER));
 
         timerService.cancelTimer(room);
+        room.compareAndSetAnsweredFlag(true, false);
 
         if (!timerService.validateCurrentRound(room)) {
             gameEnd(room);
@@ -142,6 +143,12 @@ public void onCorrectAnswer(GameCorrectAnswerEvent event) {
     @EventListener
     public void onTimeout(GameTimeoutEvent event) {
         Room room = event.room();
+
+        // false -> true 여야 하는데 실패했을 때 => 이미 정답 처리가 된 경우 (onCorrectAnswer 로직 실행 중)
+        if (!room.compareAndSetAnsweredFlag(false, true)) {
+            return;
+        }
+
         log.debug(room.getId() + "번 방 타임아웃! 현재 라운드 : " + room.getCurrentRound());
 
         String destination = getDestination(room.getId());
@@ -167,6 +174,8 @@ public void onTimeout(GameTimeoutEvent event) {
                 destination,
                 MessageType.QUESTION_START,
                 toQuestionStartResponse(room, CONTINUE_DELAY));
+
+        room.compareAndSetAnsweredFlag(true, false);
     }
 
     public void gameEnd(Room room) {