"flavia.rainone(a)jboss.com" 3. Should ClassPoolRepository.callback be a list instead? I've made it a reference to a single callback for performance reasons. I can change it if Kabir or Ales prefer.[/quote wrote : | It should definitely be a list. Other systems apart from AOP might want to do some cleanup as well and so should have the option to install a callback. Performance isn't really an issue in this case, dropping classloaders will normally happen on undeploy which involves a lot more work than creating an extra iterator :-) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4266568#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...