How i stop this Quartz thread running in tomcat.

[Vinod suryawanshi]

Hi friends,
I need to schedule one task which i want to repeat at every day morning between 6-7. So i did my R and D and find following program to create schedule job. Following program is in struts and its working fine. Its automatically started when i start tomcat. But problem is, i don't know how to stop it. when i try to stop tomcat or restart tomcat, i get pop up message with error from tomcat saying, "Tomcat stooping Fail". same thing happen with restart tomcat also.

define in struts-config.xml file a plugin,

<plug-in className="com.cron.StrutsImp">
         <set-property property="startOnLoad" value="true"/>
         <set-property property="startupDelay" value="0"/>
 </plug-in>

CronScheluder.java

package com.cron;

import org.quartz.CronTrigger;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerFactory;
import org.quartz.impl.StdSchedulerFactory;

public class CronScheluder {

    public CronScheluder() throws Exception {

        SchedulerFactory sf = new StdSchedulerFactory();

        Scheduler sche = sf.getScheduler();

        sche.start();

        JobDetail jDetail = new JobDetail("Newsletter", "NJob", MyJob.class);

        //"0 0 12 * * ?" Fire at 12pm (noon) every day
        //"0/2 * * * * ?" Fire at every 2 seconds every day

 CronTrigger crTrigger = new CronTrigger("cronTrigger", "NJob", "0/2 * * * * ?");

        sche.scheduleJob(jDetail, crTrigger);
    }
}

MyJob.java

package com.cron;

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

public class MyJob implements Job {

    public void execute(JobExecutionContext context)
     throws JobExecutionException {

      System.out.println("Cron executing ");

    }
}

StrutsImp.java

package com.cron;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import org.apache.struts.action.ActionServlet;
import org.apache.struts.action.PlugIn;
import org.apache.struts.config.ModuleConfig;

public class StrutsImp implements PlugIn {

 public static final String PLUGIN_NAME_KEY = StrutsImp.class.getName();

 public void init(ActionServlet servlet, ModuleConfig config)
  throws ServletException {

    try {
        System.out.println("Initializing PlugIn");

        ServletContext context = null;

        context = servlet.getServletContext();

        CronScheluder objPlugin = new CronScheluder(context);

        context.setAttribute(PLUGIN_NAME_KEY, objPlugin);

        System.out.println("scheluder started successfully...");

    }
    catch (Exception ex) {
      ex.printStackTrace();
    }

  }

 public void destroy()
 {

 }

}

I want this program to stop after stopping tomcat and start again after starting tomcat, and when i start again. So if anybody have any idea about this problem then please help....
Thanks in advanced.