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ActionProxy Factory  The ActionProxy obtains the Action class
and calls the appropriate method. By default, Actions are
obtained through local instantiation, but an Action could also
be obtained remotely if an alternative ActionProxy were
provided.  An alternative ActionProxy can be configured through
ActionProxyFactory. Typically, an ActionProxy will utilize the
ActionInvocation to encapsulate the execution of a particular
request.  The ActionInvocation determines how an Action is
handled: Is it being intercepted? Is there a PreResultListener
acting on it?  Essentially, ActionProxy encapsulates how an
Action can be obtained. ActionInvocation encapsulates how the
Action is executed when a request is invoked.      Next:
Configuration Provider & Configuration