how to initialize the size of EJB objects? Help!

[Jamy Wang]

want to create a instance of some EJB when JBoss AS starting.
How can I configurate the max/min size of the EJB?
In Weblogic AS, I know how to do it. In weblogic-ejb-jar.xml:
<stateless-session-descriptor>
<pool>
<max-beans-in-free-pool>1</max-beans-in-free-pool>
<initial-beans-in-free-pool>1</initial-beans-in-free-pool>
</pool>
</stateless-session-descriptor>
Can anyone tell me how to realize it on JBoss AS?
Thanks a lot!
James

[Jamy Wang]

nobody can help me?