02、Quartz 实战 - 触发器Trigger花式Scheduler调度job
任务类
1 package org.quartz.examples.example2;
2
3 import java.util.Date;
4
5 import org.slf4j.Logger;
6 import org.slf4j.LoggerFactory;
7 import org.quartz.Job;
8 import org.quartz.JobExecutionContext;
9 import org.quartz.JobExecutionException;
10 import org.quartz.JobKey;
11
12 /**
13 * 任务job
14 */
15 public class SimpleJob implements Job {
16
17 private static Logger LOG = LoggerFactory.getLogger(SimpleJob.class);
18
19 // 必须要有public修饰的无参构造函数
20 public SimpleJob() {
21 }
22
23 // 任务执行方法
24 public void execute(JobExecutionContext context) throws JobExecutionException {
25 JobKey jobKey = context.getJobDetail().getKey(); //jobKey长这样：group1.job6
26 LOG.info("执行任务。SimpleJob says: " + jobKey + " executing at " + new Date());
27 }
28
29 }
调度管理类
package org.quartz.examples.example2;
import static org.quartz.DateBuilder.futureDate;
import static org.quartz.JobBuilder.newJob;
import static org.quartz.JobKey.jobKey;
import static org.quartz.SimpleScheduleBuilder.simpleSchedule;
import static org.quartz.TriggerBuilder.newTrigger;
import org.quartz.DateBuilder;
import org.quartz.DateBuilder.IntervalUnit;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.SchedulerMetaData;
import org.quartz.SimpleTrigger;
import org.quartz.impl.StdSchedulerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Date;
/**
* 这个例子表明，只要触发器运用的好，job任务可以被花式执行
*/
public class SimpleTriggerExample {
Logger LOG = LoggerFactory.getLogger(SimpleTriggerExample.class);
public void run() throws Exception {
// 初始化一个调度工厂，并实例化一个调度类
SchedulerFactory sf = new StdSchedulerFactory();
Scheduler scheduler = sf.getScheduler();
// 第一个参数：null就是默认当前时间，也可以指定时间
// 第二个参数：把一分钟按15进行划分，也就是60/15等份。
// 举例：当前时间是10:26:04，那么startTime就是10:26:15。当前时间是10:26:31，那么startTime就是10:26:45。
Date startTime = DateBuilder.nextGivenSecondDate(null, 15);
// ========================================================
// ============ job1 任务绑定到group1 组中 ==================
// ========================================================
JobDetail job = newJob(SimpleJob.class).withIdentity("job1", "group1").build();
// 实例化一个触发器，命名为trigger1，并绑定到一个名为group1的组中，Job类运行开始时间为runTime（下一分钟）
SimpleTrigger trigger = (SimpleTrigger) newTrigger().withIdentity("trigger1", "group1").startAt(startTime)
.build();
Date date = scheduler.scheduleJob(job, trigger);
LOG.info(job.getKey() + " will run at: " + date + " and repeat: " + trigger.getRepeatCount() + " times, every "
+ trigger.getRepeatInterval() / 1000 + " seconds");
// ========================================================
// ============ job2 任务绑定到group1 组中 ==================
// ========================================================
job = newJob(SimpleJob.class).withIdentity("job2", "group1").build();
trigger = (SimpleTrigger) newTrigger().withIdentity("trigger2", "group1").startAt(startTime).build();
date = scheduler.scheduleJob(job, trigger);
LOG.info(job.getKey() + " will run at: " + date + " and repeat: " + trigger.getRepeatCount() + " times, every "
+ trigger.getRepeatInterval() / 1000 + " seconds");
// ====================================================================
// ============ job3 任务绑定到group1 组中，运行一次每间隔10秒重复1次，总共重复10次
// ====================================================================
job = newJob(SimpleJob.class).withIdentity("job3", "group1").build();
trigger = newTrigger().withIdentity("trigger3", "group1").startAt(startTime)
.withSchedule(simpleSchedule().withIntervalInSeconds(10).withRepeatCount(10)).build();
date = scheduler.scheduleJob(job, trigger);
LOG.info(job.getKey() + " will run at: " + date + " and repeat: " + trigger.getRepeatCount() + " times, every "
+ trigger.getRepeatInterval() / 1000 + " seconds");
// ====================================================================
// ============ job3 任务绑定到group2 组中，将被另一个触发器调度，这一次将以70秒的间隔重复两次
// ====================================================================
trigger = newTrigger().withIdentity("trigger3", "group2").startAt(startTime)
.withSchedule(simpleSchedule().withIntervalInSeconds(10).withRepeatCount(2)).forJob(job).build();
date = scheduler.scheduleJob(trigger);
LOG.info(job.getKey() + " will [also] run at: " + date + " and repeat: " + trigger.getRepeatCount()
+ " times, every " + trigger.getRepeatInterval() / 1000 + " seconds");
// ====================================================================
// ============ job4 将被执行6次，执行一次重复5次，每次间隔10秒
// ====================================================================
job = newJob(SimpleJob.class).withIdentity("job4", "group1").build();
trigger = newTrigger().withIdentity("trigger4", "group1").startAt(startTime)
.withSchedule(simpleSchedule().withIntervalInSeconds(10).withRepeatCount(5)).build();
date = scheduler.scheduleJob(job, trigger);
LOG.info(job.getKey() + " will run at: " + date + " and repeat: " + trigger.getRepeatCount() + " times, every "
+ trigger.getRepeatInterval() / 1000 + " seconds");
// ====================================================================
// ============ job5 将在5分钟后执行一次
// ====================================================================
job = newJob(SimpleJob.class).withIdentity("job5", "group1").build();
trigger = (SimpleTrigger) newTrigger().withIdentity("trigger5", "group1")
.startAt(futureDate(5, IntervalUnit.MINUTE)).build();
date = scheduler.scheduleJob(job, trigger);
LOG.info(job.getKey() + " will run at: " + date + " and repeat: " + trigger.getRepeatCount() + " times, every "
+ trigger.getRepeatInterval() / 1000 + " seconds");
// ====================================================================
// ============ job6 将被无限期地执行，每隔40秒执行一次
// ====================================================================
job = newJob(SimpleJob.class).withIdentity("job6", "group1").build();
trigger = newTrigger().withIdentity("trigger6", "group1").startAt(startTime)
.withSchedule(simpleSchedule().withIntervalInSeconds(40).repeatForever()).build();
date = scheduler.scheduleJob(job, trigger);
LOG.info(job.getKey() + " will run at: " + date + " and repeat: " + trigger.getRepeatCount() + " times, every "
+ trigger.getRepeatInterval() / 1000 + " seconds");
// ====================================================================
// ============ 启动调度器
// ====================================================================
scheduler.start();
// ====================================================================
// ============ 在调度器启动之后，新增加的job7仍将可以被调度，job7将5分钟执行一次，总共重复20次
// ====================================================================
job = newJob(SimpleJob.class).withIdentity("job7", "group1").build();
trigger = newTrigger().withIdentity("trigger7", "group1").startAt(startTime)
.withSchedule(simpleSchedule().withIntervalInMinutes(5).withRepeatCount(20)).build();
date = scheduler.scheduleJob(job, trigger);
LOG.info(job.getKey() + " will run at: " + date + " and repeat: " + trigger.getRepeatCount() + " times, every "
+ trigger.getRepeatInterval() / 1000 + " seconds");
// ====================================================================
// ============ job8绑定到group1，只有定义好触发器，才会被执行
// ====================================================================
job = newJob(SimpleJob.class).withIdentity("job8", "group1").storeDurably().build();
scheduler.addJob(job, true); // job添加到任务调度器
scheduler.triggerJob(jobKey("job8", "group1")); // 手动触发job8，绑定到group1
try {
Thread.sleep(30L * 1000L); // 等待30秒，让任务都执行完毕
} catch (Exception e) {
}
/**
* 终止调度。
* 但是如果当前仍然有任务正在运行中，则会等待该任务执行完毕再终止，期间debug信息会打印：
* 21:48:54.965 [main] DEBUG org.quartz.simpl.SimpleThreadPool - Waiting for thread TestScheduler_Worker-1 to shut down
*/
scheduler.shutdown(true);
// 显示调度器的一些统计信息
SchedulerMetaData metaData = scheduler.getMetaData();
LOG.info("Executed " + metaData.getNumberOfJobsExecuted() + " jobs.");
}
// 演示触发器被重新调度案例
private void rescheduleJobDemo() throws SchedulerException {
// 初始化一个调度工厂，并实例化一个调度类
SchedulerFactory sf = new StdSchedulerFactory();
Scheduler scheduler = sf.getScheduler();
// 第一个参数：null就是默认当前时间，也可以指定时间
// 第二个参数：把一分钟按30进行划分，也就是60/30等份。
// 举例：当前时间是21:01:27，那么startTime就是21:01:30。当前时间是21:01:32，那么startTime就是21:02:00。
Date startTime = DateBuilder.nextGivenSecondDate(null, 15);
// ====================================================================
// ============ job600 将被无限期地执行，每隔5秒执行一次，由trigger2019触发
// ====================================================================
JobDetail job = newJob(SimpleJob.class).withIdentity("job600", "group1").build();
SimpleTrigger trigger = newTrigger().withIdentity("trigger2019", "group1").startAt(startTime)
.withSchedule(simpleSchedule().withIntervalInSeconds(5).repeatForever()).build();
Date date = scheduler.scheduleJob(job, trigger);
LOG.info(job.getKey() + " will run at: " + date + " and repeat: " + trigger.getRepeatCount() + " times, every "
+ trigger.getRepeatInterval() / 1000 + " seconds");
// ====================================================================
// ============ 启动调度器
// ====================================================================
scheduler.start();
try {
System.out.println("线程进入睡眠");
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("线程被唤醒");
// ====================================================================
// ============ job600 被重新定义的trigger2019触发器重新调度，改为每1秒钟执行一次
// ====================================================================
SimpleTrigger trigger2 = newTrigger().withIdentity("trigger2019", "group1").startAt(startTime)
.withSchedule(simpleSchedule().withIntervalInSeconds(1).repeatForever()).build();
Date date2 = scheduler.rescheduleJob(trigger2.getKey(), trigger2);
LOG.info("job600 rescheduled to run at: " + date2);
}
public static void main(String[] args) throws Exception {
SimpleTriggerExample example = new SimpleTriggerExample();
example.run();
example.rescheduleJobDemo(); // 重新调度案例
}
}