Carlo, This approach is probably not the right way to go. How about: WebServiceContextCallback callback = new WebServiceContextCallback() { public MessageContext getMessageContext() { ... } public WebServiceContext getWebServiceContext() { ... } }; sessionContext.registerWebServiceContextCallback(callback); The WebServiceContextCallback interface would live in the ejb3 code base. The dependency would be unidirectional, as it is now already. cheers -thomas Carlo de Wolf wrote: -- xxxxxxxxxxxxxxxxxxxxxxxxxxxx Thomas Diesler Web Service Lead JBoss, a division of Red Hat xxxxxxxxxxxxxxxxxxxxxxxxxxxx