java - Spring 4 STOMP Websockets 心跳

Question

我似乎找不到关于如何在 Spring 中使用 websockets 向客户端发送心跳的好资源!

我有一个使用此配置运行的基本服务器:

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {

    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.enableSimpleBroker("/room");
        config.setApplicationDestinationPrefixes("/app");
    }

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/channels").withSockJS();
    }
}

然后我使用类似这样的方式向订阅房间的人发送消息:

this.simpMessagingTemplate.convertAndSend("/room/" + this.roomId, message);

这是用于与服务器通信的客户端代码:

this.connect = function (roomNameParam, connectionCallback) {
    var socket = new SockJS('http://localhost:8080/channels'),

    self.stompClient = Stomp.over(socket);
    self.stompClient.connect({}, function (frame) {
        self.stompClient.subscribe('/room/' + roomNameParam, connectionCallback);
    });
};

我真的很想实现心跳，以便客户端知道谁已连接并发送一些数据以保持客户端和服务器同步。

我需要手动做吗？

Answer 1

只需调用:

.setTaskScheduler(heartBeatScheduler());

对于要启用它的代理配置(也适用于简单代理)。

@Configuration
public class WebSocketMessageBrokerConfig extends AbstractWebSocketMessageBrokerConfigurer {

    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.setApplicationDestinationPrefixes("/app");
        config.enableSimpleBroker("/topic", "/queue", "/user")
                .setTaskScheduler(heartBeatScheduler());
    }

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/endpoint");
    }

    @Bean
    public TaskScheduler heartBeatScheduler() {
        return new ThreadPoolTaskScheduler();
    }

}