Can''t get Presence from Roster object

Smack Smack Dev
1

I just started using the smack library and I’'m having problems retrieving presence information from a roster.

I can setup a packetfilter to collect presence packets after the client is already logged in and it works fine when someone changes their status. But I need find the status of each user on the roster when the client is first starting up.

My roster object is definately populated with JIDs. I can iterate through it and see each one. The problem is that Roster.getPresence(“someuser”) always returns null instead of a presence object. Here’‘s what I’'m trying:

roster = connection.getRoster();

Presence presence = roster.getPresence(“user@localhost”);

if (presence.getType() == Presence.Type.UNAVAILABLE) { …

presence.getType() always throws a null pointer exception.

I ran the debug and can see the contact information coming in a soon as the connection is made but the call to roster.getPresence() doesn’'t seem to generate any traffic at all.

Any idea what I’'m missing here?

Thanks for the help!

2

Billy,

Smack won’‘t have any presence information until it’‘s sent from the server. This is probably what’'s happening in your case – you simply need to wait a few seconds for the presence information to arrive.

Basically, you should change your logic so that null presence is treated as unavailable. You can then add a presence listener to listen for any new presence packets coming in from the server.

Regards,

Matt

3

Matt,

You were right.

I created a queue in the presence listener and then told the method that does the initial update to check it first. Wor

Thanks for the quick response.

4

Hi,

I had similar experience. I finally added reload and it gets the roster on login. Here is how it looks in my code:

roster = connection.getRoster();

roster.reload();

Teddy