Actually that's not correct (hence my "off the top of my head"), as Module/ClassLoader can be created from different/multiple (sub)deployments. e.g. ear + jars Why exactly do you need DeploymentUnit? What is your environment - where do you want to access DU from? Looks like class's classloader is your starting point. Why? Give more details and we'll find the solution together. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4266887#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...