openwfe.org.misc.SignalService Maven / Gradle / Ivy
/*
* Copyright (c) 2001-2006, John Mettraux, OpenWFE.org
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* . Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* . Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* . Neither the name of the "OpenWFE" nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* $Id: SignalService.java 2713 2006-06-01 14:38:45Z jmettraux $
*/
//
// SignalService.java
//
// john.mettraux
//
// generated with
// jtmpl 1.1.01 2004/05/19 ([email protected])
//
package openwfe.org.misc;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.SocketChannel;
import openwfe.org.net.NetUtils;
import openwfe.org.net.SocketService;
import openwfe.org.ServiceException;
/**
* A service that listens on a TCP port and waits for signals :
* currently, only the STOP signal is implemented.
*
* CVS Info :
*
$Author: jmettraux $
*
$Id: SignalService.java 2713 2006-06-01 14:38:45Z jmettraux $
*
* @author [email protected]
*/
public class SignalService
extends SocketService
{
private final static org.apache.log4j.Logger log = org.apache.log4j.Logger
.getLogger(SignalService.class.getName());
//
// CONSTANTS & co
//
// FIELDS
//
// CONSTRUCTORS
//
// METHODS from SocketService
/**
* How an incoming socket connection is treated.
*/
public void handle (final SelectionKey key)
throws ServiceException
{
SocketChannel channel = null;
java.io.BufferedReader br = null;
try
{
channel = (SocketChannel)key.channel();
if (log.isDebugEnabled())
{
log.debug
("handle() conn from "+
channel.socket().getInetAddress());
}
if ( ! "/127.0.0.1".equals
(channel.socket().getInetAddress().toString()))
{
channel.close();
return;
}
br = new java.io.BufferedReader(NetUtils.channelToReader(channel));
final String signal = br.readLine();
if (log.isDebugEnabled())
log.debug("handle() received signal >"+signal+"<");
if (signal.equals("STOP"))
{
getContext().stop();
log.info("exiting....................");
System.exit(-7);
}
if (signal.equals("PAUSE"))
{
getContext().pause();
}
else if (signal.equals("PLAY"))
{
getContext().play();
}
else if (signal.equals("STATE"))
{
// returns the current state of the application
sendState(channel);
}
}
catch (final Exception e)
{
log.warn("handle() signal problem", e);
}
finally
{
try { br.close(); } catch (final Throwable t) { }
try { channel.close(); } catch (final Throwable t) { }
}
}
private void sendState (final SocketChannel channel)
throws java.io.IOException
{
final String sState = getContext().getState().toString() + "\n";
final ByteBuffer bState = ByteBuffer.wrap(sState.getBytes());
channel.write(bState);
//channel.flush();
// no flush method for channels...
}
//
// METHODS from Service
/*
public org.jdom.Element getStatus ()
{
return new org.jdom.Element(this.getName());
}
*/
//
// STATIC METHODS
}