Hi Tom, Yes I'd like to know which client the InvokerCallbackHandler is from so I can send a callback to a specific client. I'm investigating using remoting with something akin to a online chat system. I was planning on having some kind of custom login method, in which I would get the InvocationRequest.getSessionId() and link it to the username. I'd then like to link the InvokerCallbackHandler to that username also, so its possilbe to send a callback to a specific user. For example if user1 wants to send a chat message to user2 only. If there is some other best practice for this kind of situation please let me know. Thanks, James View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4021692#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...