/*
 * Copyright (C) 2009 eXo Platform SAS.
 *
 * This 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 software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.exoplatform.services.scheduler.impl;

import org.exoplatform.commons.utils.SecurityHelper;
import org.exoplatform.container.BaseContainerLifecyclePlugin;
import org.exoplatform.container.ExoContainer;
import org.exoplatform.container.ExoContainerContext;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import org.picocontainer.Startable;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.impl.StdSchedulerFactory;

import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;

/**
 * Created by The eXo Platform SAS Author : Tuan Nguyen
 * tuan08@users.sourceforge.net Dec 13, 2005
 * 
 * @version $Id: QuartzSheduler.java 34394 2009-07-23 09:23:31Z dkatayev $
 */
public class QuartzSheduler implements Startable
{
   private static final Log LOG = ExoLogger.getLogger("exo.kernel.component.common.QuartzSheduler");
   
   private final Scheduler scheduler_;

   public QuartzSheduler(ExoContainerContext ctx) throws Exception
   {
      final SchedulerFactory sf = new StdSchedulerFactory();

      try
      {
         scheduler_ = SecurityHelper.doPrivilegedExceptionAction(new PrivilegedExceptionAction<Scheduler>()
         {
            public Scheduler run() throws Exception
            {
               return sf.getScheduler();
            }
         });
      }
      catch (PrivilegedActionException pae)
      {
         Throwable cause = pae.getCause();
         if (cause instanceof SchedulerException)
         {
            throw (SchedulerException)cause;
         }
         else if (cause instanceof RuntimeException)
         {
            throw (RuntimeException)cause;
         }
         else
         {
            throw new RuntimeException(cause);
         }
      }
      
      // If the scheduler has already been started, it is necessary to put the scheduler
      // in standby mode to ensure that the jobs of the ExoContainer won't launched too early
      scheduler_.standby();
      // This will launch the scheduler when all the components will be started  
      ctx.getContainer().addContainerLifecylePlugin(new BaseContainerLifecyclePlugin()
      {

         @Override
         public void startContainer(ExoContainer container) throws Exception
         {
            scheduler_.start();
         }         
      });
   }

   public Scheduler getQuartzSheduler()
   {
      return scheduler_;
   }

   public void start()
   {
   }

   public void stop()
   {
      try
      {
         scheduler_.shutdown();
      }
      catch (SchedulerException ex)
      {
         LOG.warn("Could not shutdown the scheduler", ex);
      }
   }
}
