package com.blogspot.stan1slav.sample.jobs;  
   
 import commonj.timers.CancelTimerListener;  
 import commonj.timers.Timer;  
 import commonj.timers.TimerListener;  
   
 import java.io.Serializable;  
   
 import java.util.Date;  
   
 public class HelloWorldJob implements Serializable, TimerListener,  
                    CancelTimerListener {  
   private Date timerDate = null;  
   
   public HelloWorldJob() {  
     super();  
   }  
   
   public void timerExpired(Timer timer) {  
     timerDate = new Date(timer.getScheduledExecutionTime());  
     System.out.println("HelloWorldJob timer expired called on " +  
               timerDate);  
   }  
   
   public void timerCancel(Timer timer) {  
     timerDate = new Date(timer.getScheduledExecutionTime());  
     System.out.println("HelloWorldJob timer cancelled called on " +  
               timerDate);  
   }  
 }  

 package com.blogspot.stan1slav.sample;  
   
 import com.blogspot.stan1slav.sample.jobs.HelloWorldJob;  
   
 import commonj.timers.Timer;  
 import commonj.timers.TimerManager;  
   
 import java.io.IOException;  
 import java.io.PrintWriter;  
   
 import java.util.Date;  
   
 import javax.naming.InitialContext;  
   
 import javax.servlet.ServletConfig;  
 import javax.servlet.ServletException;  
 import javax.servlet.http.HttpServlet;  
 import javax.servlet.http.HttpServletRequest;  
 import javax.servlet.http.HttpServletResponse;  
   
 public class JobsServlet extends HttpServlet {  
   private Timer helloWorldJobTimer = null;  
   private TimerManager tm = null;  
   
   public void init(ServletConfig config) throws ServletException {  
     super.init(config);  
     System.out.println("InitJobsServlet is initialized ");  
   
     try {  
       InitialContext ic = new InitialContext();  
       tm = (TimerManager)ic.lookup("java:comp/env/tm/TimerManager");  
       helloWorldJobTimer =  
           tm.schedule(new HelloWorldJob(), new Date(), 5000); //5 seconds  
     } catch (Exception ne) {  
       ne.printStackTrace();  
     }  
   }  
   
   public void service(HttpServletRequest req,  
             HttpServletResponse res) throws IOException {  
     res.setContentType("text/html");  
     PrintWriter out = res.getWriter();  
     out.println("<h4>JobsServlet is working!</h4>");  
     String cmd = req.getParameter("cmd");  
     if (cmd != null && cmd.equals("cancel") && helloWorldJobTimer != null) {  
       helloWorldJobTimer.cancel();  
       helloWorldJobTimer = null;  
     }  
     if (cmd != null && cmd.equals("start") && helloWorldJobTimer == null) {  
       helloWorldJobTimer =  
           tm.schedule(new HelloWorldJob(), new Date(), 5000);  
     }  
     if (helloWorldJobTimer != null) {  
       out.println("<h6>HelloWorldJob started</h6>");  
     } else {  
       out.println("<h6>HelloWorldJob calceled</h6>");  
     }  
   }  
 }  

 <?xml version = '1.0' encoding = 'UTF-8'?>  
 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"  
      version="2.5" xmlns="http://java.sun.com/xml/ns/javaee">  
  <servlet>  
   <servlet-name>JobsServlet</servlet-name>  
   <servlet-class>com.blogspot.stan1slav.sample.JobsServlet</servlet-class>  
   <load-on-startup>100</load-on-startup>  
  </servlet>  
  <servlet-mapping>  
   <servlet-name>JobsServlet</servlet-name>  
   <url-pattern>/jobsservlet</url-pattern>  
  </servlet-mapping>  
  <resource-ref>  
   <res-ref-name>tm/TimerManager</res-ref-name>  
   <res-type>commonj.timers.TimerManager</res-type>  
   <res-auth>Container</res-auth>  
   <res-sharing-scope>Unshareable</res-sharing-scope>  
  </resource-ref>
 </web-app>