/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.qpid.nclient.util;
import org.apache.qpid.nclient.MessagePartListener;
import org.apache.qpid.transport.Header;
import org.apache.qpid.transport.MessageTransfer;
import java.io.IOException;
import java.nio.ByteBuffer;
/**
* This is a simple message assembler.
* Will call onMessage method of the adaptee
* when all message data is read.
*
* This is a good convinience utility for handling
* small messages
*/
public class MessagePartListenerAdapter implements MessagePartListener
{
private MessageListener _adaptee;
private ByteBufferMessage _currentMsg;
public MessagePartListenerAdapter(MessageListener listener)
{
_adaptee = listener;
}
public void messageTransfer(MessageTransfer xfr)
{
_currentMsg = new ByteBufferMessage(xfr.getId());
Header header = xfr.getHeader();
_currentMsg.setDeliveryProperties(header.getDeliveryProperties());
_currentMsg.setMessageProperties(header.getMessageProperties());
ByteBuffer body = xfr.getBody();
if (body == null)
{
body = ByteBuffer.allocate(0);
}
try
{
_currentMsg.appendData(body);
}
catch(IOException e)
{
// A chance for IO exception
// doesn't occur as we are using
// a ByteBuffer
}
_adaptee.onMessage(_currentMsg);
}
}