Spring in the Enterprise - Spring Enterprise Recipes: A Problem Solution Approach - page 280

public class Main {

public static void main(String[] args) throws Exception {
ApplicationContext context =
new ClassPathXmlApplicationContext("beans.xml");

FileReplicator documentReplicator =
(FileReplicator) context.getBean("documentReplicator");

JobDetail job = new JobDetail();
job.setName("documentReplicationJob");
job.setJobClass(FileReplicationJob.class);
Map dataMap = job.getJobDataMap();
dataMap.put("fileReplicator", documentReplicator);

SimpleTrigger trigger = new SimpleTrigger();
trigger.setName("documentReplicationJob");
trigger.setStartTime(new Date(System.currentTimeMillis() + 5000));
trigger.setRepeatCount(SimpleTrigger.REPEAT_INDEFINITELY);
trigger.setRepeatInterval(60000);

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

In the Main class, you first configure the job details for your file replication job in a JobDetail object
and prepare job data in its jobDataMap property. Next, you create a SimpleTrigger object to configure the
scheduling properties. Finally, you create a scheduler to run your job using this trigger.
Quartz supports two types of triggers: SimpleTrigger and CronTrigger . SimpleTrigger allows you to
set trigger properties such as start time, end time, repeat interval, and repeat count. CronTrigger accepts
a Unix cron expression for you to specify the times to run your job. For example, you can replace the
preceding SimpleTrigger with the following CronTrigger to run your job at 17:30 every day:

CronTrigger trigger = new CronTrigger();
trigger.setName("documentReplicationJob");
trigger.setCronExpression("0 30 17 * * ?");

A cron expression is made up of seven fields (the last field is optional), separated by spaces.
Table 6-1 shows the field description for a cron expression.

Table 6-1. Field Description for a Cron Expression

Position Field Name Range

1 Second 0-59

2 Minute 0-59

3 Hour 0-23