thanks, that is what i want. but can i get this information from "outside" of jboss? what i have to do to get this information from a client(servlet or application)? do i have to write a mbean?
No need to write an MBean.
You can connect to a remote MBeanServer and read attributes from any registered MBean, just like the jmx-console does.
There are examples of how to do this on the jboss docs or the wiki.
thank you very much. now i know what i'm looking for :)