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/*
* SIP Communicator, the OpenSource Java VoIP and Instant Messaging client.
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package net.java.sip.communicator.impl.shutdowntimeout;
import net.java.sip.communicator.util.*;
import org.osgi.framework.*;
/**
* In order to shut down SIP Communicator we kill the Felix system bundle.
* However, this sometimes doesn't work for reason of running non-daemon
* threads (such as the javasound event dispatcher). This results in having
* instances of SIP Communicator running in the background.
*
* We use this shutdown timout bundle in order to fix this problem. When our
* stop method is called, we assume that a shutdown is executed and start a 15
* seconds daemon thread. If the application is still running once these 15
* seconds expire, we System.exit() the application.
*
* @author Emil Ivov
*/
public class ShutdownTimeout
implements BundleActivator
{
private static final Logger logger
= Logger.getLogger(ShutdownTimeout.class);
/**
* The number of miliseconds that we wait before we force a shutdown.
*/
public static final long SHUTDOWN_TIMEOUT = 15000;//ms
/**
* The code that we exit with if the application is not down in 15 seconds.
*/
public static final int SYSTEM_EXIT_CODE = 500;
/**
* Dummy impl of the bundle activator start method.
*
* @param context unused
* @throws Exception If this method throws an exception
* (which won't happen).
*/
public void start(BundleContext context)
throws Exception
{
if (logger.isDebugEnabled())
logger.debug("Starting the ShutdownTimeout service.");
}
/**
* Called when this bundle is stopped so the Framework can perform the
* bundle-specific activities necessary to stop the bundle.
*
* @param context The execution context of the bundle being stopped.
* @throws Exception If this method throws an exception, the bundle is
* still marked as stopped, and the Framework will remove the bundle's
* listeners, unregister all services registered by the bundle, and
* release all services used by the bundle.
*/
public void stop(BundleContext context)
throws Exception
{
Thread shutdownTimeoutThread = new Thread()
{
public void run()
{
synchronized(this)
{
try{
if (logger.isTraceEnabled())
logger.trace("Starting shutdown countdown of "
+ SHUTDOWN_TIMEOUT + "ms.");
wait(SHUTDOWN_TIMEOUT);
logger.error("Failed to gently shutdown. Forcing exit.");
System.exit(500);
}catch (InterruptedException ex){
if (logger.isDebugEnabled())
logger.debug("Interrupted shutdown timer.");
}
}
}
};
if (logger.isTraceEnabled())
logger.trace("Created the shutdown timer thread.");
shutdownTimeoutThread.setDaemon(true);
shutdownTimeoutThread.start();
}
}
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