Spring 4 STOMP Websockets 心跳

Spring 4 STOMP Websockets Heartbeat

我似乎无法在 Spring 中找到有关如何使用 websockets 向客户端发送心跳的好资源!

我有一个基本服务器 运行 使用此配置:

@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。

需要手动操作吗?

Spring SockJS 配置包含发送心跳的设置。默认情况下,假设连接上没有发送其他消息,每 25 秒发送一次心跳。有关详细信息,请参阅 the Spring reference

对于简单的代理,您可以像这样配置心跳:

<websocket:message-broker application-destination-prefix="/app">
    <websocket:stomp-endpoint path="/wshandler" allowed-origins="*">
    </websocket:stomp-endpoint>
    <websocket:simple-broker prefix="/topic, /queue" heartbeat="10000,10000" scheduler="pingScheduler"/>
</websocket:message-broker>

<bean id="pingScheduler" class="org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler">
    <property name="poolSize" value="1"/>
    <property name="threadNamePrefix" value="wss-heartbeat-thread-"/>
</bean>

只需拨打:

.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();
    }

}