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package org.apache.qpid.nclient.util;
import java.io.IOException;
import java.nio.ByteBuffer;
import org.apache.qpid.transport.*;
import org.apache.qpid.nclient.MessagePartListener;
/**
* 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
{
MessageListener _adaptee;
ByteBufferMessage _currentMsg;
public MessagePartListenerAdapter(MessageListener listener)
{
_adaptee = listener;
}
public void messageTransfer(MessageTransfer xfr)
{
_currentMsg = new ByteBufferMessage(xfr.getId());
for (Struct st : xfr.getHeader().getStructs())
{
if(st instanceof DeliveryProperties)
{
_currentMsg.setDeliveryProperties((DeliveryProperties)st);
}
else if(st instanceof MessageProperties)
{
_currentMsg.setMessageProperties((MessageProperties)st);
}
}
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);
}
}
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