@Override
    public Observable<Message> process(Observable<Message> inputStream) {
        return inputStream.map(new Func1<Message, Message>() {
            @Override
            public Message call(Message message) {
                return new GenericMessage<String>(message.getPayload() + "-pojopong");
            }
        });
    }
A simple stream processor that transforms messages by adding "-pong" to the payload.

@author Mark Pollack
spring-xd-rxjava/src/test/java/org/springframework/xd/rxjava/PongMessageProcessor.java