AOP is not yet fully mavenised, so use ant for now. It looks like it is using the SemaphoredObjectMixin to install the semaphore. In the tutorial that comes with the dist there is a tutorial example about mixins and introductions. Instead of using mixins, you could also use a per_instance scoped aspect. There don't actually seem to be any tests for this... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4103617#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...