[feat] #155 heartbeat 처리를 위한 스케줄러 추가

src/main/java/com/book/backend/global/stomp/WebSocketConfig.java

@@ -1,8 +1,10 @@
 package com.book.backend.global.stomp;
 
 import lombok.RequiredArgsConstructor;
+import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.messaging.simp.config.MessageBrokerRegistry;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
 import org.springframework.web.socket.config.annotation.EnableWebSocket;
 import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
 import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
@@ -33,4 +35,14 @@ public void configureMessageBroker(final MessageBrokerRegistry registry) {
         registry.enableSimpleBroker("/sub")// 구독요청
                 .setHeartbeatValue(new long[]{0, 10000}); // 클라이언트로부터 10초마다 ping 받는것으로 소켓 연결 유지
     }
+
+    // heartbeat 처리를 위한 스케줄러
+    @Bean
+    public ThreadPoolTaskScheduler taskScheduler() {
+        ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();
+        scheduler.setPoolSize(1);
+        scheduler.setThreadNamePrefix("wss-heartbeat-thread-");
+        scheduler.initialize();
+        return scheduler;
+    }
 }