A Container is what a JOnAS Server can see of a JOnAS Container.
It holds all beans coming from a same ejbjar file.
There is no possibility to add or remove dynamically beans in
a Container since it is build with all its beans.
JMX can use this interface, but no specific Jmx classes should
be inside the Container.
This class is responsible for swapping bean instances to keep memory usage
low enough, according to entity max-cache-size and inactivity-timeout values
and to passivate instances on timeout when used outside transactions.