Quartz 2 Scheduler example

Quartz helps to schedule a job to run at a specific time.

• Download quartz-2.1.5.jar from this location and add to buildpath of your project.
• For maven Project:

<dependencies>
 <dependency>
  <groupId>org.quartz-scheduler</groupId>
  <artifactId>quartz</artifactId>
  <version>2.1.5</version>
 </dependency>
</dependencies>

• File > New > Other > Dynamic Web Project

• Copy quartz.2.1.5.jar under WEB-INF/lib

• File > New > Class

package code.more.talk.less; import org.quartz.Job; import org.quartz.JobExecutionContext; import org.quartz.JobExecutionException; public class QuartzJOB implements Job{          public void execute(JobExecutionContext context)throws JobExecutionException  {           System.out.println("Hello Quartz!");       } }

File > New > Folder >> resources

• Right click > properties > Java Build Path > Source

• Right click on resources folder > New > Other > Properties File

• Content of quartz.properties file:

org.quartz.scheduler.instanceName = QuartzJOB org.quartz.threadPool.threadCount = 3 org.quartz.plugin.jobInitializer.class =org.quartz.plugins.xml.XMLSchedulingDataProcessorPlugin org.quartz.plugin.jobInitializer.fileNames = quartz.xml org.quartz.plugin.jobInitializer.failOnFileNotFound = true

• Right click on resources folder > New > Other > Xml file

Content of quartz.xml file:

<?xml version="1.0" encoding="UTF-8"?> <job-scheduling-data       xmlns="http://www.quartz-scheduler.org/xml/JobSchedulingData"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xsi:schemaLocation="http://www.quartz-scheduler.org/xml/JobSchedulingData         http://www.quartz-scheduler.org/xml/job_scheduling_data_1_8.xsd"       version="1.8">       <schedule>             <job>                   <name>QuartzJOB</name>                   <job-class>code.more.talk.less.QuartzJOB</job-class>             </job>             <trigger>                   <cron>                         <name>QuartzTrigger</name>                         <job-name>QuartzJOB</job-name>                         <!-- It will run every 5 seconds -->                         <cron-expression>0/5 * * * * ?</cron-expression>                   </cron>             </trigger>       </schedule>       </job-scheduling-data>

Add below code to the web.xml:

<context-param>          <param-name>quartz:config-file</param-name>          <param-value>quartz.properties</param-value>          <!-- <param-value>/some/path/my_quartz.properties</param-value> -->      </context-param>      <context-param>          <param-name>quartz:shutdown-on-unload</param-name>          <param-value>true</param-value>      </context-param>      <context-param>          <param-name>quartz:wait-on-shutdown</param-name>          <param-value>true</param-value>      </context-param>      <context-param>          <param-name>quartz:start-on-load</param-name>          <param-value>true</param-value>      </context-param>           <listener>           <listener-class>               org.quartz.ee.servlet.QuartzInitializerListener          </listener-class>      </listener>

Start application server and see the result: