Dirk, sorry for the delay in getting back to you, but here are some comments on your document. 1: on page 3 you state "The listener implementation class is not serializeable. This not allows to use the JBoss ESB message type JAVA_SERIALIZED, because we not provide MarshalUnmarshalPlugin only for the message type JBOSS_XML. " I didn't understand that. Why does the serializability (or not) of the listener affect the Message? 2: the use of JAXB makes perfect sense AFAICT from what you want to achieve. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4141646#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...