PongMessageProcessor.java

/*
 * Copyright 2014 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.xd.reactor;

import reactor.fn.Function;
import reactor.rx.Stream;

import org.springframework.messaging.Message;
import org.springframework.messaging.support.GenericMessage;

/**
 * A simple stream processor that transforms messages by adding "-pong" to the payload.
 *
 * @author Mark Pollack
 */
@SuppressWarnings("rawtypes")
public class PongMessageProcessor implements Processor<Message, Message> {

    @Override
    public Stream<Message> process(Stream<Message> inputStream) {
        return inputStream.map(new Function<Message, Message>() {
            @Override
            public Message apply(Message message) {
                return new GenericMessage<String>(message.getPayload() + "-pojopong");
            }
        });
    }
}