A simple Handler which logs the request and response messages to either
the console or a specified file (default "axis.log").
To use this, deploy it either in both the request and response flows
(global, service, or transport) or in just the response flow. If deployed
in both places, you'll also get an elapsed time indication, which can be
handy for debugging.
Doug Davis (firstname.lastname@example.org), Glen Daniels (email@example.com)
Invoke is called to do the actual work of the Handler object.
If there is a fault during the processing of this method it is
invoke's job to catch the exception and undo any partial work
that has been completed. Once we leave 'invoke' if a fault
is thrown, this classes 'onFault' method will be called.
Invoke should rethrow any exceptions it catches, wrapped in
msgContext - the MessageContext to process with this