The consumer and producer exchange data using a protocol, which simply means that the consumer makes a request, the producer perform something and returns back a response that the consumer should handle. The protocol operates on an object model that is defined by the module. The object model must be serializable. The consumer provides a request context that is the service contract between the consumer implementation and the producer implementation. Pretty much like the PortletInvocationContext. Eveything that the producer needs from the consumer (callbacks) should be on the request context. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4061211#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...