HornetQ doesn't have a 'subtopic' concept. I'm not sure what you are trying to achieve, can you give more details?
I am not sure either, because I don't have so much time in the moment to experiment with that. But I read some articles and it seems that this is a function of richfaces 4 in order to manage several 'channels' over on topic.
So the idea seams to be something like this:
notify is the topic from horneq and the server sends to page1@notify if only page1 should be notified. I think richfaces analyses the message from the topic and the subtopic concept seems to be a richfaces thing.
Sorry for the question, but those fundamental basics are never discussed or described.
Greetings and thanks for your time!
Like Clebert has already said there is no such thing as sub topics in HornetQ (or JMS) , however we do have topic hierarchies, for instance a message sent to queue.jms.* will go to queue.jms.q1 and queue.jms.q2.
Maybe if you explain what they are or read the rich faces docs we may be able to help you