public String invokeTest( String input ) throws Exception {
TestInvocation service = (TestInvocation) getService( testConfiguration.getServiceInterface(),
testConfiguration.getTestServiceName() );
return service.invokeTest( input );
} // end method invokeTest
protected <T> T getService( Class<T> interfaze, String serviceName ) {
T service = node.getService( interfaze, serviceName );
return service;