Think of this as a "Hello World" for Quartz
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/*
* All content copyright Terracotta, Inc., unless otherwise indicated. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
*/
package org.quartz.examples.example1;
import java.util.Date;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
/**
* <p>
* This is just a simple job that says "Hello" to the world.
* </p>
*
* @author Bill Kratzer
*/
public class HelloJob implements Job {
private static Logger _log = LoggerFactory.getLogger(HelloJob.class);
/**
* <p>
* Empty constructor for job initilization
* </p>
* <p>
* Quartz requires a public empty constructor so that the
* scheduler can instantiate the class whenever it needs.
* </p>
*/
public HelloJob() {
}
/**
* <p>
* Called by the <code>{@link org.quartz.Scheduler}</code> when a
* <code>{@link org.quartz.Trigger}</code> fires that is associated with
* the <code>Job</code>.
* </p>
*
* @throws JobExecutionException
* if there is an exception while executing the job.
*/
public void execute(JobExecutionContext context)
throws JobExecutionException {
// Say Hello to the World and display the date/time
_log.info("Hello World! - " + new Date());
}
}
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/*
* All content copyright Terracotta, Inc., unless otherwise indicated. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
*/
package org.quartz.examples.example1;
import static org.quartz.DateBuilder.evenMinuteDate;
import static org.quartz.JobBuilder.newJob;
import static org.quartz.TriggerBuilder.newTrigger;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerFactory;
import org.quartz.Trigger;
import org.quartz.impl.StdSchedulerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Date;
/**
* This Example will demonstrate how to start and shutdown the Quartz scheduler and how to schedule a job to run in
* Quartz.
*
* @author Bill Kratzer
*/
public class SimpleExample {
public void run() throws Exception {
Logger log = LoggerFactory.getLogger(SimpleExample.class);
log.info("------- Initializing ----------------------");
// First we must get a reference to a scheduler
SchedulerFactory sf = new StdSchedulerFactory();
Scheduler sched = sf.getScheduler();
log.info("------- Initialization Complete -----------");
// computer a time that is on the next round minute
Date runTime = evenMinuteDate(new Date());
log.info("------- Scheduling Job -------------------");
// define the job and tie it to our HelloJob class
JobDetail job = newJob(HelloJob.class).withIdentity("job1", "group1").build();
// Trigger the job to run on the next round minute
Trigger trigger = newTrigger().withIdentity("trigger1", "group1").startAt(runTime).build();
// Tell quartz to schedule the job using our trigger
sched.scheduleJob(job, trigger);
log.info(job.getKey() + " will run at: " + runTime);
// Start up the scheduler (nothing can actually run until the
// scheduler has been started)
sched.start();
log.info("------- Started Scheduler -----------------");
// wait long enough so that the scheduler as an opportunity to
// run the job!
log.info("------- Waiting 65 seconds... -------------");
try {
// wait 65 seconds to show job
Thread.sleep(65L * 1000L);
// executing...
} catch (Exception e) {
//
}
// shut down the scheduler
log.info("------- Shutting Down ---------------------");
sched.shutdown(true);
log.info("------- Shutdown Complete -----------------");
}
public static void main(String[] args) throws Exception {
SimpleExample example = new SimpleExample();
example.run();
}
}
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Executing result:
15:42:46.041 INFO org.quartz.examples.example1.SimpleExample 45 run - ------- Initializing ----------------------
15:42:46.255 INFO org.quartz.impl.StdSchedulerFactory 1172 instantiate - Using default implementation for ThreadExecutor
15:42:46.262 INFO org.quartz.simpl.SimpleThreadPool 268 initialize - Job execution threads will use class loader of thread: main
15:42:46.295 INFO org.quartz.core.SchedulerSignalerImpl 61 <init> - Initialized Scheduler Signaller of type: class org.quartz.core.SchedulerSignalerImpl
15:42:46.297 INFO org.quartz.core.QuartzScheduler 240 <init> - Quartz Scheduler v.2.2.3 created.
15:42:46.300 INFO org.quartz.simpl.RAMJobStore 155 initialize - RAMJobStore initialized.
15:42:46.302 INFO org.quartz.core.QuartzScheduler 305 initialize - Scheduler meta-data: Quartz Scheduler (v2.2.3) 'DefaultQuartzScheduler' 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 10 threads.
Using job-store 'org.quartz.simpl.RAMJobStore' - which does not support persistence. and is not clustered.
15:42:46.304 INFO org.quartz.impl.StdSchedulerFactory 1327 instantiate - Quartz scheduler 'DefaultQuartzScheduler' initialized from default resource file in Quartz package: 'quartz.properties'
15:42:46.305 INFO org.quartz.impl.StdSchedulerFactory 1331 instantiate - Quartz scheduler version: 2.2.3
15:42:46.307 INFO org.quartz.examples.example1.SimpleExample 51 run - ------- Initialization Complete -----------
15:42:46.312 INFO org.quartz.examples.example1.SimpleExample 56 run - ------- Scheduling Job -------------------
15:42:46.341 INFO org.quartz.examples.example1.SimpleExample 66 run - group1.job1 will run at: Sun Aug 12 15:43:00 CST 2018
15:42:46.342 INFO org.quartz.core.QuartzScheduler 575 start - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED started.
15:42:46.343 INFO org.quartz.examples.example1.SimpleExample 72 run - ------- Started Scheduler -----------------
15:42:46.344 INFO org.quartz.examples.example1.SimpleExample 76 run - ------- Waiting 65 seconds... -------------
15:43:00.027 INFO org.quartz.examples.example1.HelloJob 65 execute - Hello World! - Sun Aug 12 15:43:00 CST 2018
15:43:51.346 INFO org.quartz.examples.example1.SimpleExample 86 run - ------- Shutting Down ---------------------
15:43:51.347 INFO org.quartz.core.QuartzScheduler 694 shutdown - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED shutting down.
15:43:51.349 INFO org.quartz.core.QuartzScheduler 613 standby - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED paused.
15:43:51.840 INFO org.quartz.core.QuartzScheduler 771 shutdown - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED shutdown complete.
15:43:51.842 INFO org.quartz.examples.example1.SimpleExample 88 run - ------- Shutdown Complete ----------------