You could also make them compatible by adding the following to your compile time aop config: | <introduction class=&quot;(a)org.jboss.cache.aop.annotation.PojoCacheable&quot;&gt; | <mixin> | <interfaces>org.jboss.aspects.patterns.observable.Subject</interfaces> | <class>org.jboss.aspects.patterns.observable.SubjectImpl</class> | <construction>new org.jboss.aspects.patterns.observable.SubjectImpl(this)</construction> | </mixin> | </introduction> | -Jason View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4065098#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...