PortletMessageComponent
Throwaway Naive implementation of Porlet Messages as an abstraction and a place holder for when the next
spec covers inter-portlet communication
A PortletResourceURLFactory can be used to generate an url for direct rendering of a Portlet, comparable (but more limited)
to what Portlet 2.0 (likely) is going to provide when it introduces ResourceURLs.
Proxy for a Servlet HttpSession to attach to a PortletSession, providing only access to PORTLET_SCOPE session attributes
and hiding the APPLICATION_SCOPE attributes from the Servlet.