Java

What is Quartz?

Quartz is a full-featured, open source job scheduling framework. Quartz can be used to create simple or complex schedulers for executing tens, hundreds, or even tens-of-thousands of jobs; jobs whose tasks are defined as standard Java components that may execute virtually anything you may program them to do.

The Quartz Scheduler includes many enterprise-class features, such as JTA transactions and clustering.

Demo:

Scheduler: This  a Scheduler Program, that schedules or Triggers a Job(Java Program) on a specified frequency.

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package demoquartz;

import org.quartz.JobDetail;

import org.quartz.Scheduler;

import org.quartz.SchedulerException;

import org.quartz.SchedulerFactory;

import org.quartz.Trigger;

import org.quartz.TriggerUtils;

/**

 *

 * @author sathya

 */

public class DemoScheduler {

public static void main (String[] args) {

try {

SchedulerFactory factory = new org.quartz.impl.StdSchedulerFactory();

Scheduler scheduler = factory.getScheduler();

scheduler.start();

JobDetail jobDetail = new JobDetail("demmoJob", null, DemoJob.class);

// Fires every 10 seconds

Trigger ranchTrigger = TriggerUtils.makeSecondlyTrigger(10);

ranchTrigger.setName("ranchTrigger");

scheduler.scheduleJob(jobDetail, ranchTrigger);

} catch (SchedulerException ex) {

ex.printStackTrace();

}

}

}

Job : Job to be Triggered by the Scheduler

package demoquartz;

import org.quartz.Job;

import org.quartz.JobExecutionContext;

import org.quartz.JobExecutionException;

/**

 *

 * @author sathya

 */

public class DemoJob implements Job {

public void execute (JobExecutionContext ctx) throws JobExecutionException {

System.out.println("Welcome at Quartz Scheduled Job....");

}

}

Libraries required : commons-logging.jar and quartz.-1.6.6.jar

Thanks

Sathya