file = new File("target/filelanguage/test/hello.txt");
GenericFile<File> gf = FileConsumer.asGenericFile("target/filelanguage", file, null);
FileEndpoint endpoint = getMandatoryEndpoint(uri, FileEndpoint.class);
Exchange answer = endpoint.createExchange(gf);
endpoint.configureMessage(gf, answer.getIn());
Calendar cal = GregorianCalendar.getInstance();
cal.set(1974, Calendar.APRIL, 20);
answer.getIn().setHeader("birthday", cal.getTime());