[undertow-dev] WebSocket sending back pressure

[peter royal]

Thanks!

I entered two issues, 

https://issues.jboss.org/browse/UNDERTOW-769 for cancelling messages and
https://issues.jboss.org/browse/UNDERTOW-768 which is what occurred that
is having me implement some flow control.

-pete

-- 
(peter.royal|osi)@pobox.com - http://fotap.org/~osi

On Thu, Jul 7, 2016, at 07:25 PM, Stuart Douglas wrote:
> Cancellation might be possible to implement, however obviosly once the
> message has actually started sending it will no longer be possible to
> cancel.
> 
> If you create a JIRA I will look into it.
> 
> Stuart
> 
> On Thu, Jul 7, 2016 at 10:27 PM, peter royal <peter.royal at pobox.com>
> wrote:
> > The flush method on *FrameSinkChannel channels? I could use that to see
> > if a message had been sent, but how might that be incorporated into a
> > back pressure algorithm?
> >
> > At my application level I have the notion of a 'topic' that a WS message
> > is sent on. For most topics only the most recent message is the one that
> > matters. For those topics I was going to use the WebSocketCallback to
> > only allow one at a time to be queued on the WebSocketChannel.
> >
> > -pete
> >
> > --
> > (peter.royal|osi)@pobox.com - http://fotap.org/~osi
> >
> > On Thu, Jul 7, 2016, at 07:13 AM, Jason T. Greene wrote:
> >> There is also a flush method on the channel if it's helpful.
> >>
> >> > On Jul 7, 2016, at 7:10 AM, peter royal <peter.royal at pobox.com> wrote:
> >> >
> >> > I looked some more and cancellation would be a huge change - I'm going
> >> > to see how far I can get by using the existing callback for flow
> >> > control.
> >> >
> >> > -pete
> >> >
> >> > --
> >> > (peter.royal|osi)@pobox.com - http://fotap.org/~osi
> >> >
> >> >> On Wed, Jul 6, 2016, at 09:43 PM, Stuart Douglas wrote:
> >> >> Some of the methods take a WebSocketCallback that will notify you on
> >> >> completion or error, however at the moment there is no way to cancel a
> >> >> message.
> >> >>
> >> >> Stuart
> >> >>
> >> >> On Thu, Jul 7, 2016 at 6:56 AM, peter royal <peter.royal at pobox.com>
> >> >> wrote:
> >> >>> I am finding that sometimes I have WebSocket connections that are unable
> >> >>> to flush messages out the socket at the rate I am generating messages.
> >> >>>
> >> >>> I'm using the core.WebSockets class to send messages. Is it possible to
> >> >>> achieve this with what exists currently? My initial guess is no..
> >> >>> conceptually it would be nice for core.WebSockets to return a
> >> >>> CompletableFuture-style object that would let me get a callback when the
> >> >>> message is sent, or have the ability to cancel it if it is still sitting
> >> >>> in the send queue.
> >> >>>
> >> >>> I'm happy to help build something into Undertow if it is a welcome
> >> >>> addition.
> >> >>>
> >> >>> -pete
> >> >>>
> >> >>> --
> >> >>> (peter.royal|osi)@pobox.com - http://fotap.org/~osi
> >> >>> _______________________________________________
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> >> >>> https://lists.jboss.org/mailman/listinfo/undertow-dev
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