JavaEE Websocket: closing browser tab closes all sessions irrespective of browser

问题

I have a websocket endpoint as

@ServerEndpoint("/tweets")
public class TweetStreamServer {
    private static final Logger LOGGER = LoggerFactory.getLogger(TweetStreamServer.class);

    @OnMessage
    public void tweets(final String message, final Session session) throws IOException, InterruptedException {
        System.out.println("session id:" + session.getId() + ", search term: " + message);
        final Client twitterClient = TwitterHoseBird.getInstance(message);
        while (!session.getOpenSessions().isEmpty()) {
            for (final Session s : session.getOpenSessions()) {
                if (twitterClient.isDone()) {
                    System.out.println("Twitter Client Done, waiting ...");
                }
                s.getBasicRemote().sendText(TwitterHoseBird.getMsgQueue().take());
            }
        }
    }
}

I deploy this on WildFly 8.1.0 Final. Then I open multiple tabs on Chrome, Safari and run the following

var connection = new WebSocket('ws://127.0.0.1:8080/tweetstream-1.0-SNAPSHOT/tweets');
connection.onopen = function () {
  connection.send('germany');
};
connection.onerror = function (error) {
  console.log('WebSocket Error ' + error);
};
connection.onmessage = function (e) {
  console.log('Server: ' + e.data);
};
connection.onclose = function (e) {
  console.log('closing session');
};

Then all the tabs start receiving data from server.

Then when I do connection.close(); on one of the tabs, only that connection breaks while all the other tabs are still receiving the data
But if I close one of the tabs (in any browser), all the sessions that were open in all the other tabs close session with closing session message

Question
- Is it not a valid use case that if user closes a tab in one browser, all the other tabs should still receive the data?
- Do you see any bug/issue with what I am doing?
- How can I fix this issue?

Thanks

回答1:

Instead of using

s.getBasicRemote().sendText(TwitterHoseBird.getMsgQueue().take());

change it to

s.getAsyncRemote().sendText(TwitterHoseBird.getMsgQueue().take());

and everything else would just workout fine

来源：https://stackoverflow.com/questions/24741478/javaee-websocket-closing-browser-tab-closes-all-sessions-irrespective-of-browse

标签

java

javascript

session

java-ee

websocket