Write the Handler Implementation
The two handlers included in this example are
SoapSecurityHandler, a request handler, and
StringReverseHandler, a transport handler. Both derive from base class
rwsf::MessageHandlerImp.
rwsf::MessageHandlerImp is the body class of a handle/body pair. You derive from this class and implement the method invoke(). This method takes an rwsf::CallInfo object containing any data or information to be included with the message.
