Starting a Sample Application
The following code obtains an instance of the Scheduler, starts it, then shuts it down.
QuartzTest.java
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.impl.StdSchedulerFactory;
import static org.quartz.JobBuilder.*;
import static org.quartz.TriggerBuilder.*;
import static org.quartz.SimpleScheduleBuilder.*;
Note: | Once you obtain a scheduler using StdSchedulerFactory.getDefaultScheduler(), your application will not terminate until you call scheduler.shutdown(). This is because there will be active threads. |
Note the use of static imports. These come into play in the next code sample.
If you have not set up logging, log information is sent to the console. Your output will look similar to this:
[INFO] 21 Jan 08:46:27.857 AM main [org.quartz.core.QuartzScheduler]
Quartz Scheduler v.2.0.0-SNAPSHOT created.
[INFO] 21 Jan 08:46:27.859 AM main [org.quartz.simpl.RAMJobStore]
RAMJobStore initialized.
[INFO] 21 Jan 08:46:27.865 AM main [org.quartz.core.QuartzScheduler]
Scheduler meta-data: Quartz Scheduler (v2.0.0) 'Scheduler' with instanceId 'NON_CLUSTERED'
Scheduler class: 'org.quartz.core.QuartzScheduler' - running locally.
NOT STARTED.
Currently in standby mode.
Number of jobs executed: 0
Using thread pool 'org.quartz.simpl.SimpleThreadPool' - with 50 threads.
Using job-store 'org.quartz.simpl.RAMJobStore' - which does not support
persistence. and is not clustered.
[INFO] 21 Jan 08:46:27.865 AM main [org.quartz.impl.StdSchedulerFactory]
Quartz scheduler 'Scheduler' initialized from default resource file in Quartz
package: 'quartz.properties'
[INFO] 21 Jan 08:46:27.866 AM main [org.quartz.impl.StdSchedulerFactory]
Quartz scheduler version: 2.0.0
[INFO] 21 Jan 08:46:27.866 AM main [org.quartz.core.QuartzScheduler]
Scheduler Scheduler_$_NON_CLUSTERED started.
[INFO] 21 Jan 08:46:27.866 AM main [org.quartz.core.QuartzScheduler]
Scheduler Scheduler_$_NON_CLUSTERED shutting down.
[INFO] 21 Jan 08:46:27.866 AM main [org.quartz.core.QuartzScheduler]
Scheduler Scheduler_$_NON_CLUSTERED paused.
[INFO] 21 Jan 08:46:27.867 AM main [org.quartz.core.QuartzScheduler]
Scheduler Scheduler_$_NON_CLUSTERED shutdown complete.
To do something, you need to provide code between the start() and shutdown() calls. You will also need to allow some time for the job to be triggered and executed before calling shutdown(). For a simple example like this, you might call Thread.sleep(60000).
// define the job and tie it to our HelloJob class
JobDetail job = newJob(HelloJob.class)
.withIdentity("job1", "group1")
.build();
// Trigger the job to run now, and then repeat every 40 seconds
Trigger trigger = newTrigger()
.withIdentity("trigger1", "group1")
.startNow()
.withSchedule(simpleSchedule()
.withIntervalInSeconds(40)
.repeatForever())
.build();
// Tell quartz to schedule the job using our trigger
scheduler.scheduleJob(job, trigger);
For additional code samples, see Quartz Scheduler Example Programs and Code Samples.
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