/*
 * Copyright (c) JForum Team
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met:
 * 
 * 1) Redistributions of source code must retain the above 
 * copyright notice, this list of conditions and the 
 * following  disclaimer.
 * 2)  Redistributions in binary form must reproduce the 
 * above copyright notice, this list of conditions and 
 * the following disclaimer in the documentation and/or 
 * other materials provided with the distribution.
 * 3) Neither the name of "Rafael Steil" nor 
 * the names of its contributors may be used to endorse 
 * or promote products derived from this software without 
 * specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT 
 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, 
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 
 * IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
 * 
 * Class created on Jul 15, 2005
 * The JForum Project
 * http://www.jforum.net
 */
package net.jforum.summary;

import java.io.IOException;
import java.text.ParseException;

import net.jforum.util.preferences.ConfigKeys;
import net.jforum.util.preferences.SystemGlobals;

import org.apache.log4j.Logger;
import org.quartz.CronTrigger;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.Trigger;
import org.quartz.impl.StdSchedulerFactory;

/**
 * Schedule the summaries to be sent to the users.
 * 
 * @see net.jforum.summary.SummaryJob
 * 
 * @author Franklin S. Dattein (<a href="mailto:franklin@portaljava.com">franklin@portaljava.com</a>)
 * @version $Id: SummaryScheduler.java,v 1.6 2006/10/10 00:40:53 rafaelsteil Exp $
 */
public class SummaryScheduler
{
	private static Scheduler scheduler;
	private static Logger logger = Logger.getLogger(SummaryScheduler.class);
	private static boolean isStarted;

	/**
	 * Starts the summary Job. Conditions to start: Is not started yet and is enabled on the file
	 * SystemGlobasl.properties. The to enable it is "summary.enabled"
	 * (ConfigKeys.SUMMARY_IS_ENABLED).
	 * 
	 * @throws SchedulerException
	 * @throws IOException
	 */
	public static void startJob() throws SchedulerException
	{
		boolean isEnabled = SystemGlobals.getBoolValue(ConfigKeys.SUMMARY_IS_ENABLED);
		
		if (!isStarted && isEnabled) {
			String filename = SystemGlobals.getValue(ConfigKeys.QUARTZ_CONFIG);

			String cronExpression = SystemGlobals.getValue("org.quartz.context.summary.cron.expression");
			scheduler = new StdSchedulerFactory(filename).getScheduler();
			
			Trigger trigger = null;
			
			try {
				trigger = new CronTrigger(SummaryJob.class.getName(), "summaryJob", cronExpression);
				logger.info("Starting quartz summary expression " + cronExpression);
				scheduler.scheduleJob(new JobDetail(SummaryJob.class.getName(), "summaryJob", SummaryJob.class),
						trigger);
				scheduler.start();
			}
			catch (ParseException e) {
				e.printStackTrace();
			}
		}
		
		isStarted = true;
	}
}