- Nested conversations or good for e.g. multiple "sub-conversations" within a conversation. The main conversation could be a complex product search, and the sub-conversations could be product orders. Or imagine that you edit an entity in a conversation, and during that you edit multiple sub-entities in nested conversations. There are complex web apps where nested conversations are helpful. Keep in mind: conversations hold and isolate states and they can co-exist with other conversations. - LoggedIn checks if there is a logged in user. Have a look at the LoggedInInterceptor class of the booking example. btw: What is JAAS? - View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3963743#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...