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//
//  ========================================================================
//  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(); } } }





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