Well I didn't do this through an interceptor/listener, but via an extension of EntityHome from the Seam Framework. I just override the persist, update, remove methods in EnitityHome, call my audit logger, and then continue as normal. So, the only extra thing you need is a separate EntityManager instance for accessing the old version of the object for comparison (just configure another ManagedPersistenceContext in components.xml). I'm just tidying the code a bit to make it more useable, and stripping the presentation stuff out (as that uses trinidad) and then I'll post it - probably tomorrow. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3989825#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...