Su smack - using addPacketListener to receive pubsub events

Smack Smack Dev
1

Hi,

I’m writing a pub sub subscription client and have chosen su smack as a helper library.

There is very little sample code and apparently no guide or manual, so I have done my best with the following, which unfortunately does not work (listener never gets called, though I see valid pubsub events in the received message debug stream). I have been able to subscribe to the topic, etc; it is only event reception that is the problem.

Has anyone got this working? Or should I be using a different approach?

PacketFilter packetFilter = XMPPUtils.createPubSubFilter();
               PacketListener packetListener = XMPPUtils.createEventPacketListener(
                         new PubSubEventListener() {
                              public void onDelete(DeleteElement deletedElt)
                                        throws Exception {
                                   System.out.println("*** d ***");
                              }                               public void onPublish(ItemElement publishedElt)
                                        throws Exception {
                                   System.out.println("*** item ***");
                                   System.out.println(publishedElt.getContentXML());
                              }                               public void onPurge(PurgeElement purgedElt)
                                        throws Exception {
                                   System.out.println("*** p ***");
                              }                               public void onRetract(RetractElement retractedElt)
                                        throws Exception {
                                   System.out.println("*** r ***");
                              }
                         }
               );                c.addPacketListener(packetListener, packetFilter);
2

Try using the latest version of Smack from trunk. It contains an API for using pubsub.

IMHO it is much easier to use than su-smack, and its usage is is documented along with other Smack extensions.

Also, why is this under Spark Support instead of Smack Support? Are you adding the functionality to Spark?

3

Oops, my mistake. Any further correspondence I’ll make sure to put under Smack.

Thanks for the pointer re: Smack update.

I have done more investigation and I’m not yet convinced it’s a problem with su smack (although that is not very easy to use and as I mentioned, essentially you’re on your own re: docs); I am getting unexpected results from Smack methods like Packet.getExtension(). Perhaps the newer code works better.

4

I agree with you about ease of use.

That is why I wrote the Smack extension to support pubsub . This old thread gives some history, and here is the documentation.