/*
* ALMA - Atacama Large Millimiter Array
* (c) European Southern Observatory, 2002
* Copyright by ESO (in the framework of the ALMA collaboration),
* All rights reserved
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
package alma.acs.container;
import java.util.logging.Logger;
import alma.acs.shutdown.ShutdownHookBase;
/**
* This class will be registered to the JVM Runtime as a shutdown thread to be run at shutdown,
* both for regular termination and for interruption like Ctrl-C (SIGINT).
* <p>
* TODO: look at <code>void TerminationSignalHandler(int)</code> from the C++ implementation,
* and figure out what else to do at shutdown.
* @author hsommer
*/
public class ShutdownHook extends ShutdownHookBase
{
private AcsContainer m_acsContainer;
ShutdownHook(Logger logger)
{
super(logger, "ContainerVM");
}
protected void regularTermination()
{
// regular exit (unless something went wrong after setRegularShutdownExpected() had been called
logger.info("about to exit the JVM...thanks for using our container, come back soon...");
}
/**
* Tidying up when the JVM is about to terminate due to an interrupt signal
*/
protected void interruptDetected()
{
// termination
logger.severe("*** container process has been interrupted - will shut down ***");
if (m_acsContainer != null)
{
// since the OS won't wait long, use gracefully==false
// so that the abort methods are called
m_acsContainer.shutdown(AcsContainer.CONTAINER_EXIT << 8, false, false);
}
// The ORB gets shut off as well in container.shutdown,
// so the logger is no longer available
System.err.println("*** emergency shutdown complete, will exit... ***");
}
/**
* Sets m_acsContainer.
*/
public void setAcsContainer(AcsContainer acsContainer)
{
m_acsContainer = acsContainer;
}
}