Though I am not as experienced with JBoss I think your best shot would be to go with simple RMI. In any case, go with Option 2! What you are listing are basically the different types of packages War = web, ear = enterprise and ejb3. They also specify where the config *.xmls have to be located and their names. Would you require a session-based system where each connection could return a different set of values? If so go with a Stateless SessionBean. You can also have an MBean or a Service Bean, but they would only exist once. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4137959#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...