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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* 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.apache.tuscany.core.wire.impl;
import org.apache.tuscany.core.wire.Interceptor;
import org.apache.tuscany.core.wire.MessageChannel;
import org.apache.tuscany.core.message.Message;
/**
* An interceptor that first sends a message down its request channel then extracts the response from the
* message and sends it down the response channel before returning it up the interceptor stack.
*
* @version $Rev$ $Date$
*/
public class RequestResponseInterceptor implements Interceptor {
private MessageChannel sourceRequestChannel;
private MessageChannel sourceResponseChannel;
private MessageChannel targetRequestChannel;
private MessageChannel targetResponseChannel;
/**
* Construct an interceptor that sends messages down the supplied channels.
*
* @param targetRequestChannel the channel to send request messages down
* @param targetResponseChannel the channel to sent response messages down
*/
public RequestResponseInterceptor(MessageChannel sourceRequestChannel, MessageChannel targetRequestChannel,
MessageChannel sourceResponseChannel, MessageChannel targetResponseChannel) {
this.sourceRequestChannel = sourceRequestChannel;
this.sourceResponseChannel = sourceResponseChannel;
this.targetRequestChannel = targetRequestChannel;
this.targetResponseChannel = targetResponseChannel;
}
public Message invoke(Message requestMessage) {
if (sourceRequestChannel != null) {
sourceRequestChannel.send(requestMessage);
}
if (targetRequestChannel != null) {
targetRequestChannel.send(requestMessage);
}
Message responseMessage = requestMessage.getRelatedCallbackMessage();
if (targetResponseChannel != null) {
targetResponseChannel.send(responseMessage);
}
if (sourceResponseChannel != null) {
sourceResponseChannel.send(responseMessage);
}
return responseMessage;
}
public void setNext(Interceptor next) {
throw new IllegalStateException("This interceptor must be the last one in an interceptor chain");
}
}
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