/*
* Copyright 2017 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.integration.handler;
import org.springframework.context.Lifecycle;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageHandler;
/**
* The {@link AbstractReplyProducingMessageHandler} wrapper around raw {@link MessageHandler}
* for request-reply scenarios, e.g. {@code @ServiceActivator} annotation configuration.
* <p>
* This class is used internally by Framework in cased when request-reply is important
* and there is no other way to apply advice chain.
* <p>
* The lifecycle control is delegated to the {@code target} {@link MessageHandler}.
*
* @author Artem Bilan
*
* @since 5.0
*/
public class ReplyProducingMessageHandlerWrapper extends AbstractReplyProducingMessageHandler
implements Lifecycle {
private final MessageHandler target;
public ReplyProducingMessageHandlerWrapper(MessageHandler target) {
this.target = target;
}
@Override
protected Object handleRequestMessage(Message<?> requestMessage) {
this.target.handleMessage(requestMessage);
return null;
}
@Override
public void start() {
if (this.target instanceof Lifecycle) {
((Lifecycle) this.target).start();
}
}
@Override
public void stop() {
if (this.target instanceof Lifecycle) {
((Lifecycle) this.target).stop();
}
}
@Override
public boolean isRunning() {
return !(this.target instanceof Lifecycle) || ((Lifecycle) this.target).isRunning();
}
}