[JDEV] Messaging with Resources, desired behavior

[Robert Norris]

> When I first send a message to someone, I send it to someone at jabber.com.
> The server then looks through (I'm assuming) what resources "someone" is
> logged in with, picks the one with the highest priority, and forwards
> the message to them. This means that the message actually is delivered
> so someone at jabber.com/HighPriorityResource.
> 
> If/When they reply, so I quickly get a message back from
> someone at jabber.com/HighPriorityResource. 
> 
> If I reply to that message, should I send it to the user at resource, or
> continue sending it to "user", and let the server make the resource
> priority decision on each and every message?

I guess it depends on whether or not the received message and the
"reply" is related. A reply sent from an IM client should probably use
the resource (because you want to get to a specific session, where you
know there is a person to read it), but some kind of middleware
application might want to just send to the user itself.

> More importantly, let's say someone at jabber.com/HighPriorityResource goes
> offline and I send him a message (using the full JID + Resource), but
> comes online at someone at jabber.com/DifferentResource - will the server
> automatically deliver the message to that resource, or will the message
> be archived for the next time (s)he logs in using that exact resource
> name?

The message will be bounced.

> Is this behavior concretely defined somewhere? I've looked, but couldn't
> find it...

Delivery rules are defined here:

  http://www.jabber.org/ietf/draft-ietf-xmpp-im-11.html#rules

Rob.

-- 
Robert Norris                                       GPG: 1024D/FC18E6C2
Email+Jabber: rob at cataclysm.cx                Web: http://cataclysm.cx/
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