org.eclipse.jetty.server.nio.InheritedChannelConnector Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.server.nio;
import java.io.IOException;
import java.nio.channels.Channel;
import java.nio.channels.ServerSocketChannel;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
/**
* An implementation of the SelectChannelConnector which first tries to
* inherit from a channel provided by the system. If there is no inherited
* channel available, or if the inherited channel provided not usable, then
* it will fall back upon normal ServerSocketChannel creation.
*
* Note that System.inheritedChannel() is only available from Java 1.5 onwards.
* Trying to use this class under Java 1.4 will be the same as using a normal
* SelectChannelConnector.
*
* Use it with xinetd/inetd, to launch an instance of Jetty on demand. The port
* used to access pages on the Jetty instance is the same as the port used to
* launch Jetty.
*
* @author athena
*/
public class InheritedChannelConnector extends SelectChannelConnector
{
private static final Logger LOG = Log.getLogger(InheritedChannelConnector.class);
/* ------------------------------------------------------------ */
@Override
public void open() throws IOException
{
synchronized(this)
{
try
{
Channel channel = System.inheritedChannel();
if ( channel instanceof ServerSocketChannel )
_acceptChannel = (ServerSocketChannel)channel;
else
LOG.warn("Unable to use System.inheritedChannel() [" +channel+ "]. Trying a new ServerSocketChannel at " + getHost() + ":" + getPort());
if ( _acceptChannel != null )
_acceptChannel.configureBlocking(true);
}
catch(NoSuchMethodError e)
{
LOG.warn("Need at least Java 5 to use socket inherited from xinetd/inetd.");
}
if (_acceptChannel == null)
super.open();
}
}
}