Quartz实现JAVA定时任务的动态配置的方法

 org.quartz-scheduler
 quartz
 2.2.1


 org.springframework
 spring-context-support

CREATE TABLE `sys_task` (
 `id` bigint(20) NOT NULL AUTO_INCREMENT,
 `job_name` varchar(255) DEFAULT NULL COMMENT '任务名',
 `description` varchar(255) DEFAULT NULL COMMENT '任务描述',
 `cron_expression` varchar(255) DEFAULT NULL COMMENT 'cron表达式',
 `bean_class` varchar(255) DEFAULT NULL COMMENT '任务执行时调用哪个类的方法 包名+类名',
 `job_status` varchar(255) DEFAULT NULL COMMENT '任务状态',
 `job_group` varchar(255) DEFAULT NULL COMMENT '任务分组',
 `create_user` varchar(64) DEFAULT NULL COMMENT '创建者',
 `create_time` datetime DEFAULT NULL COMMENT '创建时间',
 `update_user` varchar(64) DEFAULT NULL COMMENT '更新者',
 `update_time` datetime DEFAULT NULL COMMENT '更新时间',
 PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=32 DEFAULT CHARSET=utf8;

@Configuration
public class QuartzConfigration {

 @Autowired
 private JobFactory jobFactory;

 @Bean
 public SchedulerFactoryBean schedulerFactoryBean() {
  SchedulerFactoryBean schedulerFactoryBean = new SchedulerFactoryBean();
  try {
   schedulerFactoryBean.setOverwriteExistingJobs(true);
   schedulerFactoryBean.setQuartzProperties(quartzProperties());
   schedulerFactoryBean.setJobFactory(jobFactory);
  } catch (Exception e) {
   e.printStackTrace();
  }
  return schedulerFactoryBean;
 }

 // 指定quartz.properties，可在配置文件中配置相关属性
 @Bean
 public Properties quartzProperties() throws IOException {
  PropertiesFactoryBean propertiesFactoryBean = new PropertiesFactoryBean();
  propertiesFactoryBean.setLocation(new ClassPathResource("/config/quartz.properties"));
  propertiesFactoryBean.afterPropertiesSet();
  return propertiesFactoryBean.getObject();
 }

 // 创建schedule
 @Bean(name = "scheduler")
 public Scheduler scheduler() {
  return schedulerFactoryBean().getScheduler();
 }
}

@Component
@Order(value = 1)
public class ScheduleJobInitListener implements CommandLineRunner {

 @Autowired
 TaskService scheduleJobService;

 @Override
 public void run(String... arg0) throws Exception {
  try {
   scheduleJobService.initSchedule();
  } catch (Exception e) {
   e.printStackTrace();
  }

 }

}

@Override
 public void initSchedule() throws SchedulerException {
  // 这里获取任务信息数据
  List jobList = taskMapper.list();
  for (TaskDO task : jobList) {
   if (JobStatusEnum.RUNNING.getCode().equals(task.getJobStatus())) {
    quartzManager.addJob(task);
   }
  }
 }

/**
  * 添加任务*/ 
 @SuppressWarnings("unchecked")
 public void addJob(TaskDO task) {
  try {
   // 创建jobDetail实例，绑定Job实现类
   // 指明job的名称，所在组的名称，以及绑定job类
   Class<&＃63; extends Job> jobClass = (Class<&＃63; extends Job>) (Class.forName(task.getBeanClass()).newInstance()
     .getClass());
   JobDetail jobDetail = JobBuilder.newJob(jobClass).withIdentity(task.getJobName(), task.getJobGroup())// 任务名称和组构成任务key
     .build();
   // 定义调度触发规则
   // 使用cornTrigger规则
   Trigger trigger = TriggerBuilder.newTrigger().withIdentity(task.getJobName(), task.getJobGroup())// 触发器key
     .startAt(DateBuilder.futureDate(1, IntervalUnit.SECOND))
     .withSchedule(CronScheduleBuilder.cronSchedule(task.getCronExpression())).startNow().build();
   // 把作业和触发器注册到任务调度中
   scheduler.scheduleJob(jobDetail, trigger);
   // 启动
   if (!scheduler.isShutdown()) {
    scheduler.start();
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }

@Component
public class JobFactory extends AdaptableJobFactory {
 //这个对象Spring会帮我们自动注入进来,也属于Spring技术范畴.
 //为什么需要这个类呢，在我写的这个demo中，大家可以将此类删掉，发现程序也可以正确运行，可是我为什么还是加上呢。
 //大家可以看下我们的任务类，大家可以看到Job对象的实例化过程是在Quartz中进行的，这时候我们将spring的东西注入进来，肯定是行不通的，所以需要这个类
 @Autowired
 private AutowireCapableBeanFactory capableBeanFactory;

 @Override
 protected Object createJobInstance(TriggerFiredBundle bundle) throws Exception {
  //调用父类的方法
  Object jobInstance = super.createJobInstance(bundle);
  //进行注入
  capableBeanFactory.autowireBean(jobInstance);
  return jobInstance;
 }
}

@DisallowConcurrentExecution //作业不并发
@Component
public class HelloWorldJob implements Job{

 @Override
 public void execute(JobExecutionContext arg0) throws JobExecutionException {
  
  System.out.println("欢迎使用yyblog,这是一个定时任务 --小卖铺的老爷爷!"+ DateUtils.fullTime(new Date()));
  
 }

}

public void pauseJob(TaskDO task) throws SchedulerException {
  JobKey jobKey = JobKey.jobKey(task.getJobName(), task.getJobGroup());
  scheduler.pauseJob(jobKey);
 }

 public void resumeJob(TaskDO task) throws SchedulerException {
  JobKey jobKey = JobKey.jobKey(task.getJobName(), task.getJobGroup());
  scheduler.resumeJob(jobKey);
 }

 public void deleteJob(TaskDO task) throws SchedulerException {
  JobKey jobKey = JobKey.jobKey(task.getJobName(), task.getJobGroup());
  scheduler.deleteJob(jobKey);
 }

public void runJobNow(TaskDO task) throws SchedulerException {
  JobKey jobKey = JobKey.jobKey(task.getJobName(), task.getJobGroup());
  scheduler.triggerJob(jobKey);
 }

public void updateJobCron(TaskDO task) throws SchedulerException {

  TriggerKey triggerKey = TriggerKey.triggerKey(task.getJobName(), task.getJobGroup());

  CronTrigger trigger = (CronTrigger) scheduler.getTrigger(triggerKey);

  CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(task.getCronExpression());

  trigger = trigger.getTriggerBuilder().withIdentity(triggerKey).withSchedule(scheduleBuilder).build();

  scheduler.rescheduleJob(triggerKey, trigger);
 }