quartz开源作业调度框架的使用

Posted 2020-09-08

1.官网学习

地址:http://www.quartz-scheduler.org/

官网上有说明文档及示例，帮助你更好的使用API

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2.学习总结

   2.1 任务管理(启动,关闭)等操作是依靠调度器Scheduler来管理的，而Scheduler实例是通过工厂Factory获取的，调度器调用了.start()方法，才会让其管理的任务执行

  // Grab the Scheduler instance from the Factory
  Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();

  // and start it off
  scheduler.start();  

   2.2 创建任务实体类，你需要实现接口org.quartz.Job，并覆写其.execute()方法，调度器调度任务时就是执行其execute()方法

  public class MyJob implements org.quartz.Job {

      public MyJob() {
      }

      public void execute(JobExecutionContext context) throws JobExecutionException {
          System.err.println("Hello World!  MyJob is executing.");
      }
  }

   2.3 调度器scheduler通过触发器trigger来管理任务job，来确定何时任务应该执行，如每间隔多少秒执行一次等

  // define the job and tie it to our MyJob class
  JobDetail job = newJob(MyJob.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);

   2.4

   2.5

   2.6

   2.7