org.eclipse.osee.framework.plugin.core/src/org/eclipse/osee/framework/plugin/core/PluginCoreActivator.java

/*******************************************************************************
 * Copyright (c) 2004, 2007 Boeing.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Boeing - initial API and implementation
 *******************************************************************************/
package org.eclipse.osee.framework.plugin.core;

import java.util.logging.Level;
import org.eclipse.core.runtime.Platform;
import org.eclipse.osee.framework.logging.OseeLog;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleEvent;
import org.osgi.framework.BundleException;
import org.osgi.framework.BundleListener;
import org.osgi.service.packageadmin.PackageAdmin;
import org.osgi.util.tracker.ServiceTracker;

/**
 * The activator class controls the plug-in life cycle
 */
public class PluginCoreActivator extends OseeActivator {
   private static PluginCoreActivator pluginInstance; // The shared instance.
   public static final String PLUGIN_ID = "org.eclipse.osee.framework.plugin.core";
   private ServiceTracker packageAdminTracker;

   public PluginCoreActivator() {
      super();
      pluginInstance = this;
   }

   /* (non-Javadoc)
    * @see org.eclipse.core.runtime.Plugin#stop(org.osgi.framework.BundleContext)
    */
   @Override
   public void stop(BundleContext context) throws Exception {
      super.stop(context);
      packageAdminTracker.close();
   }

   /**
    * Returns the shared instance.
    */
   public static PluginCoreActivator getInstance() {
      return pluginInstance;
   }

   public PackageAdmin getPackageAdmin() {
      return (PackageAdmin) packageAdminTracker.getService();
   }

   /* (non-Javadoc)
    * @see org.eclipse.osee.framework.plugin.core.OseeActivator#start(org.osgi.framework.BundleContext)
    */
   @Override
   public void start(BundleContext context) throws Exception {
      super.start(context);

      packageAdminTracker = new ServiceTracker(context, PackageAdmin.class.getName(), null);
      packageAdminTracker.open();

      try {
         Platform.getBundle("org.eclipse.equinox.ds").start();
      } catch (Exception ex) {
         OseeLog.log(PluginCoreActivator.class, Level.SEVERE, "Unable to load: org.eclipse.equinox.ds", ex);
      }

      for (Bundle bundle : context.getBundles()) {
         checkForEarlyStartup(bundle);
      }

      context.addBundleListener(new BundleListener() {

         @Override
         public void bundleChanged(BundleEvent event) {
            if (event.getType() == BundleEvent.RESOLVED) {
               checkForEarlyStartup(event.getBundle());
            }
         }
      });
   }

   /**
    * @param bundle
    */
   private void checkForEarlyStartup(Bundle bundle) {
      if (bundle.getHeaders().get("OseeEarlyStart") != null) {
         try {
            bundle.start();
         } catch (BundleException ex) {
            OseeLog.log(OseeActivator.class, Level.SEVERE, ex);
         }
      }
   }
}