An Abstract implementation of SessionManager. The partial implementation of
SessionManager interface provides the majority of the handling required to
implement a SessionManager. Concrete implementations of SessionManager based
on AbstractSessionManager need only implement the newSession method to return
a specialized version of the Session inner class that provides an attribute
Map.
If the property
org.mortbay.jetty.servlet.AbstractSessionManager.23Notifications is set to
true, the 2.3 servlet spec notification style will be used.
author: Greg Wilkins (gregw)
Inner Class :public static class NullSessionContext implements HttpSessionContext