[undertow-dev] Handling termination of WebSocket connection

[Vladimir Tsukur]

Thanks Stuart,

Did not see this method in 1.0.x since it was added at a later release -
tried with latest version and it works well.

However, I figured out that connection termination works well iif receive
setter is set:

    WebSocketChannel channel = ...;
    channel.getReceiveSetter().set(new AbstractReceiveListener() {});
    channel.addCloseTask(new ChannelListener<WebSocketChannel>() {
        @Override
        public void handleEvent(WebSocketChannel channel) {
            ...
        }
    });

If receive setter is not set, then close task will not be called. In my
case there was no intent to receive messages from the client and just push
them from the server. Receive setter was not set => connection was not
closed.

It seems obligatory to set receive setter all the time to make the thing
work. Is it intended? While it is not a big deal really, I would imagine
that Undertow should handle connection termination without explicit receive
setter call made by the API client.


On Tue, Oct 21, 2014 at 2:08 AM, Stuart Douglas <sdouglas at redhat.com> wrote:

> WebsocketChannel.addCloseTask() should do what you are after (this is
> actually provided by the base AbstractFramedChannel class).
>
> Stuart
>
> ----- Original Message -----
> > From: "Vladimir Tsukur" <flushdia at gmail.com>
> > To: undertow-dev at lists.jboss.org
> > Sent: Tuesday, 21 October, 2014 7:20:54 AM
> > Subject: [undertow-dev] Handling termination of WebSocket connection
> >
> > Let's imagine user closed browser tab and thus terminated WebSocket
> > connection. Is there any way to run a callback method on the server-side
> to
> > handle this case?
> >
> > The requirement is to perform necessary cleanup actions when connection
> is
> > closed, regardless of the type of disconnect (normal, forced termination,
> > etc.).
> >
> > (Ideally using lower level API, and not JSR 356)
> >
> > --
> > Vladimir Tsukur
> > Software Architect, Design Engineer
> >
> > _______________________________________________
> > undertow-dev mailing list
> > undertow-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/undertow-dev
>



-- 
Vladimir Tsukur
Software Architect, Design Engineer
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/undertow-dev/attachments/20141021/f910508b/attachment.html