/*
* $Id: ExceptionReturnTcpMessageReceiver.java 20320 2010-11-24 15:03:31Z dfeist $
* --------------------------------------------------------------------------------------
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
*
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.transport.tcp;
import org.mule.DefaultMuleMessage;
import org.mule.api.ExceptionPayload;
import org.mule.api.MuleMessage;
import org.mule.api.construct.FlowConstruct;
import org.mule.api.endpoint.InboundEndpoint;
import org.mule.api.lifecycle.CreateException;
import org.mule.api.transport.Connector;
import org.mule.message.DefaultExceptionPayload;
import org.mule.transport.AbstractMessageReceiver;
import org.mule.transport.NullPayload;
import java.io.IOException;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;
import javax.resource.spi.work.Work;
/**
* Extends {@link TcpMessageReceiver} providing managing of protocol error conditions.
* {@link TcpMessageReceiver.TcpWorker#getNextMessage(Object)} is extended so, in case
* of an protocol error it will try to send the exception back to the client instead
* of ignoring it. If an exception is thrown managing the error it will ignored.
*/
public class ExceptionReturnTcpMessageReceiver extends TcpMessageReceiver
{
public ExceptionReturnTcpMessageReceiver(Connector connector, FlowConstruct flowConstruct,
InboundEndpoint endpoint)
throws CreateException
{
super(connector, flowConstruct, endpoint);
}
@Override
protected Work createWork(Socket socket) throws IOException
{
return new TcpWorker(socket, this);
}
protected class TcpWorker extends TcpMessageReceiver.TcpWorker
{
public TcpWorker(Socket socket, AbstractMessageReceiver receiver) throws IOException
{
super(socket, receiver);
}
@Override
protected Object getNextMessage(Object resource) throws Exception
{
try
{
return super.getNextMessage(resource);
}
catch (Exception e)
{
manageException(e);
return null;
}
}
private void manageException(Exception readingException) throws Exception
{
try
{
logger.warn("Failed to read message: " + readingException);
MuleMessage msg = new DefaultMuleMessage(NullPayload.getInstance(), connector.getMuleContext());
ExceptionPayload exceptionPayload = new DefaultExceptionPayload(readingException);
msg.setExceptionPayload(exceptionPayload);
List msgList = new ArrayList(1);
msgList.add(msg);
handleResults(msgList);
}
catch (Exception writingException)
{
logger.warn("Failed to write exception back to client: " + writingException);
throw writingException;
}
}
}
}