sessionClosedHandler about pontarius-xmpp

[Philonous]

sessionClosedHandler doesn't exist anymore in the git version.
But when the session is closed, nothing special happens. There won't be any more incoming stanzas, so pullMessage etc. block indefinitely and outbound stanzas will remain in the outgoing stanza channel
(That will probably change in the future. I'm not too happy with the outgoing stanza channel since there's no way to tell whether a stanza has actually been sent. The reason for it's existence is to buffer stanzas in case the connection is closed. I'm not even sure this behaviour is desirable )

[singpolyma]

Having some way to attempt reconnect and/or notify the user when the connection goes away is important, otherwise everything just blocks and we lose data.

[Philonous]

There's the connectionClosedHandler that is called when the connection goes down. The code to handle reconnecting is basically there but I needs some work because we changed the API around a lot. It's on the top of my laundry list.

[Philonous]

We have implemented the reconnect functionality (see reconnect, reconnect' and reconnectNow). It can be used like this:

session (...) config {onConnectionClosed = \s e -> do
                             liftIO $ reconnect' s
                             liftIO $ sendPresence presenceOnline s
                             return ()
                       }

Note that reconnect* doesn't set your presence to online, so you have to do it yourself.

You can end the sesseion with endSession. This will kill the associated threads and close the connection. (note that the connectionClosedHandler will not be called in this case. This is intentional as to avoid possibly calling reconnect). Since the only way this can happen is if you call endSession yourself, you can set up your own machinery to avoid blocking on getMessage or similar when you are ending the session.

[singpolyma]

Thanks! I will try this stuff out soon :)

[singpolyma]

Is the intent, then, that when a message send fails my application code will wait for some time and then resend, or similar?

[Philonous]

Yes. Inform the user that the message couldn't be sent at this moment and/or wait for some time and try to resend.

[jonkri]

I might be stating the obvious here, but please note that if you want confirmation that the stanza has actually been received, a True value will not suffice, and you should send an IQ request instead.