/*
    * Copyright (C) 2007-2012 Argeo GmbH
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *         http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.argeo.osgi.boot;
  
  import java.io.File;
  
  import org.osgi.framework.BundleContext;
  import org.osgi.framework.launch.Framework;
  
  /** Monitors the runtime and can shut it down. */
  public class AdminThread extends Thread {
  	public final static String PROP_ARGEO_OSGI_SHUTDOWN_FILE = "argeo.osgi.shutdownFile";
  	private File shutdownFile;
  	private final BundleContext bundleContext;
  
  	public AdminThread(BundleContext bundleContext) {
  		super("OSGi Boot Admin");
  		this.bundleContext = bundleContext;
  		if (System.getProperty(PROP_ARGEO_OSGI_SHUTDOWN_FILE) != null) {
  			shutdownFile = new File(
  					System.getProperty(PROP_ARGEO_OSGI_SHUTDOWN_FILE));
  			if (!shutdownFile.exists()) {
  				shutdownFile = null;
  				OsgiBootUtils.warn("Shutdown file " + shutdownFile
  						+ " not found, feature deactivated");
  			}
  		}
  	}
  
  	public void run() {
  		if (shutdownFile != null) {
  			// wait for file to be removed
  			while (shutdownFile.exists()) {
  				try {
  					Thread.sleep(1000);
  				} catch (InterruptedException e) {
  					e.printStackTrace();
  				}
  			}
  
  			Framework framework = (Framework) bundleContext.getBundle(0);
  			try {
  				// shutdown framework
  				framework.stop();
  				// wait 10 mins for shutdown
  				framework.waitForStop(10 * 60 * 1000);
  				// close VM
  				System.exit(0);
  			} catch (Exception e) {
  				e.printStackTrace();
  				System.exit(1);
  			}
  		}
  	}
  }