Problems with push to display notification from background thread

General
1

hello,

here is the sample code:

My UI subclass has an @Push annotation:

@SuppressWarnings(“serial”)
@Component
@Scope(“prototype”)
@Theme(“custom”)
@Push(transport = Transport.STREAMING)
@Widgetset(“…”)
@PreserveOnRefresh
public class CasePortalApplication extends UI {

I have a worker thread that calls executeDeletion():

                    logger.debug("Execute deletion");
                    new Thread(){
                        @Override
                        public void run() {
                            executeDeletion();
                        }
                    }.start();
                    logger.debug("Deletion executed");

and executeDeletion does a long running job and then displays a notification box:

private void executeDeletion()
{
   // do long-running operation here!
    casePortalApplication.access(new Runnable() {
        @Override
        public void run()
        {
            notifier.showNotification(message);
        }
     });
}

But the notification is not displayed (without the background thread and UI.access this did work fine).
There is no exception in the log.

Any ideas? (Tomorrow I will try to call UI.push() explicitly)

Thanks and Best Regards,
Felix

2

I tried a bit more:

  • casePortalApplication.push() does not help
  • calling notifier.showNotification(message); directly (i.e. not from access() Runnable) works
3

Does anybody have an idea? Many Thanks in advance!!

4

Can you post more code? What you have posted works for me.

By the way Transport.STREAMING is deprecated in favor of Transport.LONG_POLLING

5

hello Marco,

What works for you? The direct call to notifier.showNotification() or the
ui.access() solution? I am not sure the direct call works in all cases :-/

I will try LONG_POLLING for the next stable release.

Thanks and Best Regards,
Felix

6

The ui.access() solution works for me