JBoss AOP is a 2-step process. The info from your jboss-aop.xml file needs to be available BOTH at weaving time AND at runtime. At run-time you would use the -Djboss.aop.path system property for a standalone application. In JBoss AS a special deployer will pick up the jboss-aop.xml files and make them available. We don't support Tomcat out of the box, but need to call the AspectXmlLoader.deployXml(URL url) method, where url is the url of the -aop.xml you want to deploy. You should be able to do this from a startup servlet or something like that. Please let us know how you get on, since if this gets documented it should be very useful for a lot of people :-) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4150875#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...