Thanks for your reply!
Yes, I forgot to tell, that I'm using the jmxri.jar (SUN RI), which includes the class RequiredModelMBean.
I read, that it is possible to manage EJBs or other applications with the requiredModelMBean.
But I didnt found a way how to set ManagedResource.
I looked in the source code of the methode "setManagedResource" from RequiredModelMBean (JMX RI 1.0), but there is only the type "objectReference" allowed .
Is it now really possible to manage an ejb or application with modelmbeans? Or would it be a feature for the future?
Thanks in advance