The method invoked by the testrunner to build the messgte.
Parameters: context - contains information about the context of the test that mightbe useful (such as all messages sent/received so far in thetest) the built message throws: MactorException - if some problem occured (this exception is logged andignored)
This method is ivoked by the test runner before selector is passed to the message broker during subscribe
Parameters: params - the list of parameteres specifed for the given node in thetest-spec xml (after the ##{...} substitution has beenperformed) throws: MactorException - if some problem occured (this will cause the test to fail)