package org.argeo.cms.internal.kernel;
   
   import org.apache.commons.logging.Log;
   import org.apache.commons.logging.LogFactory;
   import org.osgi.framework.Bundle;
   import org.osgi.framework.FrameworkEvent;
   import org.osgi.framework.FrameworkUtil;
   import org.osgi.framework.launch.Framework;
   
  /** Shutdowns the OSGi framework */
  class CmsShutdown extends Thread {
  	public final int EXIT_OK = 0;
  	public final int EXIT_ERROR = 1;
  	public final int EXIT_TIMEOUT = 2;
  	public final int EXIT_UNKNOWN = 3;
  
  	private final Log log = LogFactory.getLog(CmsShutdown.class);
  	// private final BundleContext bc =
  	// FrameworkUtil.getBundle(CmsShutdown.class).getBundleContext();
  	private final Framework framework;
  
  	/** Shutdown timeout in ms */
  	private long timeout = 10 * 60 * 1000;
  
  	public CmsShutdown() {
  		super("CMS Shutdown Hook");
  		framework = (Framework) FrameworkUtil.getBundle(CmsShutdown.class).getBundleContext().getBundle(0);
  	}
  
  	@Override
  	public void run() {
  		if (framework.getState() != Bundle.ACTIVE) {
  			return;
  		}
  		
  		if (log.isDebugEnabled())
  			log.debug("Shutting down OSGi framework...");
  		try {
  			// shutdown framework
  			framework.stop();
  			// wait for shutdown
  			FrameworkEvent shutdownEvent = framework.waitForStop(timeout);
  			int stoppedType = shutdownEvent.getType();
  			Runtime runtime = Runtime.getRuntime();
  			if (stoppedType == FrameworkEvent.STOPPED) {
  				// close VM
  				//System.exit(EXIT_OK);
  			} else if (stoppedType == FrameworkEvent.ERROR) {
  				log.error("The OSGi framework stopped with an error");
  				runtime.halt(EXIT_ERROR);
  			} else if (stoppedType == FrameworkEvent.WAIT_TIMEDOUT) {
  				log.error("The OSGi framework hasn't stopped after " + timeout + "ms."
  						+ " Forcibly terminating the JVM...");
  				runtime.halt(EXIT_TIMEOUT);
  			} else {
  				log.error("Unknown state of OSGi framework after " + timeout + "ms."
  						+ " Forcibly terminating the JVM... (" + shutdownEvent + ")");
  				runtime.halt(EXIT_UNKNOWN);
  			}
  		} catch (Exception e) {
  			e.printStackTrace();
  			log.error("Unexpected exception " + e + " in shutdown hook. " + " Forcibly terminating the JVM...");
  			Runtime.getRuntime().halt(EXIT_UNKNOWN);
  		}
  	}
  
  }