Callbacks would be another possibility. Clients would need to provide an implementation of that callback interface: | TaskService getTaskService(CallbackInterface callback); | So, instead of 'pushing' the information into the service, the service would 'callbacl' the client environment when needed. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4218517#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...