Quartz调度器：JOB执行多次

Question

我正在使用石英调度程序来安排我的工作。我用过CronTrigger。但问题是触发器会被多次触发。这是我设置 cron 调度程序的代码..

SchedulerFactory schFactory = new StdSchedulerFactory();
        Scheduler sched = null;
        CronTrigger cronTrigger = null;
        try {
            sched = schFactory.getScheduler();
            JobDetail jobDetail = new JobDetail("job1", "group1",SchedulerPBGC.class);

            String cronTimerStr = "* 16 15 * * ? *";

            LOG.warn("CRON TRIGGER FORMAT  FOR PROCESSING PB GC DATA:"+cronTimerStr);

            cronTrigger = new CronTrigger("SchedTrigger", "Group1", cronTimerStr);


            sched.scheduleJob(jobDetail, cronTrigger);          
            sched.start();

            LOG.warn("SCHEDULER REGISTERED FOR PROCESSING PB GC DATA :  TIME :"+cronTimerStr);          

        } catch (SchedulerException se) {
            LOG.error("SchedulerException Message::"+se.getLocalizedMessage());     
        }

这里我的调度程序执行了作业 10 次...在这里你可以看到日志..

2012-06-20 15:16:50,001 DefaultQuartzScheduler_Worker-1 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:50,001 DefaultQuartzScheduler_Worker-1 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:50,001 DefaultQuartzScheduler_Worker-1 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:51,001 DefaultQuartzScheduler_Worker-2 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:51,001 DefaultQuartzScheduler_Worker-2 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:51,001 DefaultQuartzScheduler_Worker-2 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:52,001 DefaultQuartzScheduler_Worker-3 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:52,001 DefaultQuartzScheduler_Worker-3 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:52,001 DefaultQuartzScheduler_Worker-3 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:53,001 DefaultQuartzScheduler_Worker-4 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:53,001 DefaultQuartzScheduler_Worker-4 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:53,001 DefaultQuartzScheduler_Worker-4 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:54,001 DefaultQuartzScheduler_Worker-5 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:54,001 DefaultQuartzScheduler_Worker-5 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:54,001 DefaultQuartzScheduler_Worker-5 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:55,001 DefaultQuartzScheduler_Worker-6 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:55,001 DefaultQuartzScheduler_Worker-6 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:55,001 DefaultQuartzScheduler_Worker-6 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:56,001 DefaultQuartzScheduler_Worker-7 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:56,001 DefaultQuartzScheduler_Worker-7 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:56,001 DefaultQuartzScheduler_Worker-7 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:57,001 DefaultQuartzScheduler_Worker-8 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:57,001 DefaultQuartzScheduler_Worker-8 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:57,001 DefaultQuartzScheduler_Worker-8 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:58,001 DefaultQuartzScheduler_Worker-9 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:58,001 DefaultQuartzScheduler_Worker-9 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:58,001 DefaultQuartzScheduler_Worker-9 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:59,001 DefaultQuartzScheduler_Worker-10 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:59,001 DefaultQuartzScheduler_Worker-10 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:59,001 DefaultQuartzScheduler_Worker-10 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED--------------------

如何将 CronTimer 迭代器设置为 1 ？或者如何停止调度程序多次执行作业。

有什么建议吗？谢谢，古詹·沙阿。

Answer 1

我得到了解决方案..

我使用的 cron 语法是： String cronTimerStr = "* 16 15 * * ? *";

在 15:16 时间，Quartz 将每秒初始化所有可能的工作线程。假设在一分钟内（@ 16 分 60 秒），它将初始化最多 60 个线程。

我将第二个参数设置为零。所以新语法是“0 16 15 * * ? *”。

现在效果很好。

谢谢，古詹·沙阿。