Quartz Scheduler in Wicket – an example

2012-12-13

Quartz Scheduler in Wicket – an example

import org.apache.wicket.protocol.http.WebApplication;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SimpleTrigger;
import org.quartz.Trigger;
import org.quartz.impl.StdSchedulerFactory;


public class WicketApplication extends WebApplication
{

  Scheduler scheduler;

  // Init
  @Override protected void init() {
    System.out.println( "---- init() ----" );
    try{
      this.scheduler = StdSchedulerFactory.getDefaultScheduler();
      scheduler.start();
      JobDetail job = new JobDetail("job1", "group1", MyJobClass.class);
      Trigger trigger = new SimpleTrigger("trigger1", "group1", 10, 1000*2);
      scheduler.scheduleJob(job, trigger);
    } catch( SchedulerException se ) {
        se.printStackTrace();
    }
  }


  // Shutdown
  @Override protected void onDestroy() {
    System.out.println( "---- onDestroy() ----" );
    try {
      scheduler.shutdown();
    }
    catch( SchedulerException ex ) {
      ex.printStackTrace();
    }
  }
  // ...
}
/**
 *
 * @author Ondrej Zizka
 */
public class MyJobClass implements Job {

  private static int counter = 0;
  private static int inst = 0;

  public MyJobClass() {
    System.out.println( "INSTANTIATED "+ ++inst +" times!" );
  }

  public void execute( JobExecutionContext context ) throws JobExecutionException {
    System.out.println( "EXECUTED "+ ++counter +" times!" );
    //throw new UnsupportedOperationException("WTF.");
  }
}
// class MyJobClass
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