Estou usando o suporte do websocket Spring. Minha pergunta é como definir o tempo limite da conexão do websocket. Agora a conexão é fechada automaticamente após alguns minutos. Quero que a conexão nunca seja fechada.

Aqui está o meu manipulador de websocket:

public class MyHandler implements WebSocketHandler {
    private Logger logger = LoggerFactory.getLogger(this.getClass());
    class MyTimerTask extends TimerTask {
        private WebSocketSession session;
        public MyTimerTask(WebSocketSession session) {
            this.session = session;
        }

        @Override
        public void run() {
            try {
                String msg = ((int)(Math.random()*50)) + "";
                this.session.sendMessage(new TextMessage(msg.toString()));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    @Autowired
    private UserDao userDao;

    @Autowired
    private JdbcDaoImpl jdbcDaoImpl;
    private Timer timer;

    @Override
    public void afterConnectionEstablished(WebSocketSession session)
            throws Exception {
        System.out.println("websocket????");
        timer = new Timer();
        timer.schedule(new MyTimerTask(session), 0, 1000);
        logger.info("logger connection");
    }

    @Override
    public void handleMessage(WebSocketSession session,
            WebSocketMessage<?> message) throws Exception { }

    @Override
    public void handleTransportError(WebSocketSession session,
            Throwable exception) throws Exception { }

    @Override
    public void afterConnectionClosed(WebSocketSession session,
            CloseStatus closeStatus) throws Exception {
        System.out.println("websocket????");
        timer.cancel();
    }

    @Override
    public boolean supportsPartialMessages() {
        return false;
    }   
}

minha configuração do websocket:

<websocket:handlers>
    <websocket:mapping path="/myHandler" handler="myHandler"/>
</websocket:handlers>

<bean id="myHandler" class="com.sdp.websocket.MyHandler"/>

e cliente javascript:

var webserver = 'ws://localhost:8080/authtest/myHandler';
var websocket = new WebSocket(webserver);
websocket.onopen = function (evt) { onOpen(evt) }; 
websocket.onclose = function (evt) { onClose(evt) }; 
websocket.onmessage = function (evt) { onMessage(evt) }; 
websocket.onerror = function (evt) { onError(evt) }; 

function onOpen(evt) { 
    console.log("Connected to WebSocket server."); 
} 

function onClose(evt) { 
    console.log("Disconnected"); 
} 

function onMessage(evt) { 
    console.log('Retrieved data from server: ' + evt.data); 
} 

function onError(evt) { 
    console.log('Error occured: ' + evt.data); 
}
debugger;
function sendMsg(){
    websocket.send("{msg:'hello'}");
}