/*
* $Id: UdpMessageReceiver.java 22268 2011-06-27 16:11:32Z mike.schilling $
* --------------------------------------------------------------------------------------
* 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.udp;
import org.mule.MessageExchangePattern;
import org.mule.api.MuleEvent;
import org.mule.api.MuleException;
import org.mule.api.MuleMessage;
import org.mule.api.config.MuleProperties;
import org.mule.api.construct.FlowConstruct;
import org.mule.api.endpoint.InboundEndpoint;
import org.mule.api.lifecycle.CreateException;
import org.mule.api.lifecycle.Disposable;
import org.mule.api.transport.Connector;
import org.mule.api.transport.PropertyScope;
import org.mule.config.i18n.CoreMessages;
import org.mule.transport.AbstractMessageReceiver;
import org.mule.transport.ConnectException;
import org.mule.transport.udp.i18n.UdpMessages;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketAddress;
import java.net.SocketTimeoutException;
import java.net.URI;
import java.net.UnknownHostException;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.resource.spi.work.Work;
import javax.resource.spi.work.WorkException;
import javax.resource.spi.work.WorkManager;
/** <code>UdpMessageReceiver</code> receives UDP message packets. */
public class UdpMessageReceiver extends AbstractMessageReceiver implements Work
{
protected DatagramSocket socket = null;
protected InetAddress inetAddress;
protected int bufferSize;
private URI uri;
protected final AtomicBoolean disposing = new AtomicBoolean(false);
public UdpMessageReceiver(Connector connector, FlowConstruct flowConstruct, InboundEndpoint endpoint)
throws CreateException
{
super(connector, flowConstruct, endpoint);
bufferSize = ((UdpConnector) connector).getReceiveBufferSize();
uri = endpoint.getEndpointURI().getUri();
try
{
if (!"null".equalsIgnoreCase(uri.getHost()))
{
inetAddress = InetAddress.getByName(uri.getHost());
}
}
catch (UnknownHostException e)
{
throw new CreateException(UdpMessages.failedToLocateHost(uri), e, this);
}
}
@Override
protected void doConnect() throws Exception
{
try
{
socket = ((UdpConnector) connector).getServerSocket(endpoint);
}
catch (Exception e)
{
throw new ConnectException(UdpMessages.failedToBind(uri), e, this);
}
try
{
getWorkManager().scheduleWork(this, WorkManager.INDEFINITE, null, connector);
}
catch (WorkException e)
{
throw new ConnectException(CoreMessages.failedToScheduleWork(), e, this);
}
}
@Override
protected void doDisconnect() throws Exception
{
// this will cause the server thread to quit
disposing.set(true);
if (socket != null)
{
socket.close();
}
}
@Override
protected void doStart() throws MuleException
{
// nothing to do
}
@Override
protected void doStop() throws MuleException
{
// nothing to do
}
protected DatagramSocket createSocket(URI uri, InetAddress inetAddress) throws IOException
{
return new DatagramSocket(uri.getPort(), inetAddress);
}
/** Obtain the serverSocket */
public DatagramSocket getSocket()
{
return socket;
}
protected DatagramPacket createPacket()
{
DatagramPacket packet = new DatagramPacket(new byte[bufferSize], bufferSize);
// if (uri.getPort() > 0)
// {
// packet.setPort(uri.getPort());
// }
// packet.setAddress(inetAddress);
return packet;
}
public void run()
{
while (!disposing.get())
{
if (connector.isStarted())
{
try
{
DatagramPacket packet = createPacket();
try
{
if (logger.isDebugEnabled())
{
logger.debug("Receiving packet on " + uri);
}
socket.receive(packet);
if (logger.isTraceEnabled())
{
logger.trace("Received packet on: " + uri);
}
Work work = createWork(packet);
try
{
getWorkManager().scheduleWork(work, WorkManager.INDEFINITE, null, connector);
}
catch (WorkException e)
{
logger.error("Udp receiver interrupted: " + e.getMessage(), e);
}
}
catch (SocketTimeoutException e)
{
// ignore
}
}
catch (Exception e)
{
if (!connector.isDisposed() && !disposing.get())
{
logger.debug("Accept failed on socket: " + e, e);
getConnector().getMuleContext().getExceptionListener().handleException(e);
}
}
}
}
}
public void release()
{
dispose();
}
@Override
protected void doDispose()
{
if (socket != null && !socket.isClosed())
{
logger.debug("Closing Udp connection: " + uri);
socket.close();
logger.info("Closed Udp connection: " + uri);
}
}
protected Work createWork(DatagramPacket packet) throws IOException
{
return new UdpWorker(new DatagramSocket(0), packet);
}
protected class UdpWorker implements Work, Disposable
{
private DatagramSocket socket = null;
private DatagramPacket packet;
public UdpWorker(DatagramSocket socket, DatagramPacket packet)
{
this.socket = socket;
this.packet = packet;
}
public void release()
{
dispose();
}
public void dispose()
{
if (socket != null && !socket.isClosed())
{
try
{
socket.close();
}
catch (Exception e)
{
logger.error("Socket close failed", e);
}
}
socket = null;
}
/** Accept requests from a given Udp address */
public void run()
{
MuleMessage returnMessage = null;
try
{
MuleMessage message = createMuleMessage(packet, endpoint.getEncoding());
final SocketAddress clientAddress = socket.getRemoteSocketAddress();
if (clientAddress != null)
{
message.setProperty(MuleProperties.MULE_REMOTE_CLIENT_ADDRESS, clientAddress, PropertyScope.INBOUND);
}
MuleEvent event = routeMessage(message);
returnMessage = event == null ? null : event.getMessage();
if (endpoint.getExchangePattern().hasResponse() && returnMessage != null)
{
byte[] data= returnMessage.getPayloadAsBytes();
DatagramPacket result = new DatagramPacket(data, data.length,
packet.getAddress(), packet.getPort());
socket.send(result);
}
}
catch (Exception e)
{
if (!disposing.get())
{
getConnector().getMuleContext().getExceptionListener().handleException(e);
}
}
finally
{
dispose();
}
}
}
}