Quartz Scheduler – Scheduling Job in Java via Quartz Scheduler

 
Quartz scheduler to help Java application to scheduler a job/task to run at a specified date and time.
 

Library

 
commons-logging-1.1.1.jar
log4j-1.2.16.jar
quartz-2.2.1.jar
slf4j-api-1.6.6.jar
slf4j-log4j12-1.6.6.jar
 

Quartz Job

 
Quartz job is defined what you want to run

package com.quartz;

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

public class QuartzJob implements Job {
	public void execute(JobExecutionContext context)
			throws JobExecutionException {
		JobKey jobKey = context.getJobDetail().getKey();
		System.out.println("Quartz " + "Job Key " + jobKey);
	}
}

Quartz Trigger

 
Quartz trigger is defined when the Quartz will run your above Quartz’s job
 
There are 2 types of triggers in Quartz 2

 
SimpleTrigger – Run every 10 seconds.
 

Trigger trigger = newTrigger().withIdentity("TriggerName", "Group1")
                .withSchedule(SimpleScheduleBuilder.simpleSchedule()
		.withIntervalInSeconds(10).repeatForever()).build();

 
CronTrigger – Run every 10 seconds
 

Trigger trigger = newTrigger()
		.withIdentity("TriggerName", "Group2")
		.withSchedule(CronScheduleBuilder.cronSchedule("0/5 * * * * ?")).build();

 
Scheduler
 
Scheduler class links both “Job” and “Trigger” together and execute it.
 

Scheduler scheduler = new StdSchedulerFactory().getScheduler();
scheduler.start();
scheduler.scheduleJob(job, trigger);

 
Recommended Article

• Integrating Quartz Scheduler with Java Web Application

Full Example
 
Quartz 2 full examples with SimpleTrigger and CronTrigger.
 

package com.quartz;

import static org.quartz.JobBuilder.newJob;
import static org.quartz.TriggerBuilder.newTrigger;

import org.quartz.CronScheduleBuilder;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SimpleScheduleBuilder;
import org.quartz.Trigger;
import org.quartz.impl.StdSchedulerFactory;

public class QuartzSchedulerDemo {

public static void SimpleTriggerExample() throws SchedulerException {

	JobDetail job = newJob(QuartzJob.class).withIdentity(
			"SimpleQuartzTrigger", "Group1").build();

	Trigger trigger = newTrigger()
			.withIdentity("TriggerName", "Group1")
			.withSchedule(SimpleScheduleBuilder.simpleSchedule()
			.withIntervalInSeconds(10).repeatForever())
			.build();

	Scheduler sched = new StdSchedulerFactory().getScheduler();
	sched.scheduleJob(job, trigger);
	sched.start();
}

public static void CronTriggerExample() throws SchedulerException {
	JobDetail job = newJob(QuartzJob.class).withIdentity(
			"CronQuartzTrigger", "Group2").build();

	Trigger trigger = newTrigger()
			.withIdentity("TriggerName", "Group2")
			.withSchedule(CronScheduleBuilder.cronSchedule("0/5 * * * * ?"))
			.build();

	Scheduler scheduler = new StdSchedulerFactory().getScheduler();
	scheduler.start();
	scheduler.scheduleJob(job, trigger);
}

public static void main(String[] args) throws SchedulerException {
	SimpleTriggerExample();
	CronTriggerExample();
}
}

 
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