踩java客户端

Question

如果使用STOMP Client在服务器端编码出现问题，我想向客户端发送警报。我在谷歌搜索过但没有找到任何例子，但我找到了STOMP client documentation。

我在控制器中编写了以下代码

WebSocketClient transport = new StandardWebSocketClient();
WebSocketStompClient stompClient = new WebSocketStompClient(transport);
stompClient.setMessageConverter(new StringMessageConverter());
String url = "ws://localhost:8080/SpringMVCStompClient/alert";
StompSessionHandler handler = new MySessionHandler();
stompClient.connect(url, handler);

和MyHandler代码是：

public class MySessionHandler extends StompSessionHandlerAdapter {
    @Override
    public void afterConnected(StompSession session, StompHeaders connectedHeaders) {
        Alert alert= new Alert();
        alert.setName("Server");
        alert.setMessage("Message from server");
        session.send("/topic/alert", alert);
    }
}

当我尝试执行此执行时，不会转到MyHandler类。这是正确的方法吗？
帮帮我，我怎样才能向客户发送警报。

Websocket XML配置

<websocket:message-broker application-destination-prefix="/app">
        <websocket:stomp-endpoint path="/alert">
            <websocket:sockjs/>
        </websocket:stomp-endpoint>
        <websocket:simple-broker prefix="/topic"/>
    </websocket:message-broker>

控制器

 @Autowired
    public SpringMVCController(SimpMessagingTemplate template) {
        this.template = template;
    }

@Autowired
private SimpMessagingTemplate template;

@MessageMapping("/alert")
@SendTo("/topic/alert")
public Alerts alerts(Alerts alerts) throws Exception {        
    Alert alert= new Alert();
    alert.setName("Server");
    alert.setMessage("Message from server");
    this.template.convertAndSend("/topic/alert", alert);

    return alerts;
}

客户端js代码服务

(function(angular, SockJS, Stomp) {
  angular.module("alertApp.services").service("AlertService", function($q, $timeout) {

    var service = {}, listener = $q.defer(), socket = {
      client: null,
      stomp: null
    };

    service.SOCKET_URL = "/SpringMVCStompClient/alert";
    service.ALERT_TOPIC = "/topic/alert";
    service.ALERT_BROKER = "/app/alert";

    service.receive = function() {
      return listener.promise;
    };

    service.send = function(alert) {
      socket.stomp.send(service.ALERT_BROKER, { priority: 9}, JSON.stringify({
        message: alert.message,
        name: alert.name
      }));
    };

    service.disconnect = function() {
        socket.stomp.disconnect();
    };

    var startListener = function() {
      socket.stomp.subscribe(service.ALERT_TOPIC, function(data) {
          listener.notify(JSON.parse(data.body));
      });
    };

    service.initialize = function() {
      socket.client = new SockJS(service.SOCKET_URL);
      socket.stomp = Stomp.over(socket.client);
      socket.stomp.connect({}, startListener);
    };

    return service;
  });
})(angular, SockJS, Stomp);