"david.lloyd(a)jboss.com" wrote : OK how about this. What is the mechanism to find the DeploymentUnit that a Class belongs to? Does jboss-cl give us something which does this? You can do this: (1) Get CL for the class (2) Get the Module for CL (3) Search all DUs for matching Module --> the one that has that Module as an attachment is your DU There might be a faster way, but I need to check the code, as this was off the top of my head. :-) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4235907#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...