This alternate session storage handler does not write any attribute into the session until the very end of a chain
of forwarded requests (i.e., not even at the end of an inner forwarded request).
Message resources extension that knows how to evaluate JSP 2.0-style expressions (set in the message keys) that are
prefixed with a special indicator string.
Specialization of the base ServletBeanContext that adds a Page Flow service provider to offer
initialization for PageFlowController and SharedFlowControler members in a Control.
Unchecked exception thrown in situations where output would normally be written to the response,
but when the runtime is configured to throw an exception instead.