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Spring Quartz2 动态任务的实例详解

  • 时间:2021-10-19 21:03 编辑: 来源: 阅读:
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摘要:Spring Quartz2 动态任务的实例详解
[b]Spring Quartz2 动态任务的实例详解[/b] 此处使用的是Quartz中SimpleScheduleBuilder类,非CronScheduleBuilder,CronScheduleBuilder是Cron表达式的。具体请自行百度。 实现代码: 
/** 
   * 新增任务 
   * @param scheduleJob 
   * @throws Exception 
   */ 
  @Override 
  @SuppressWarnings("unchecked") 
  public void addJobSimple(ScheduleJob scheduleJob) throws Exception{ 
    TriggerKey triggerKey = TriggerKey.triggerKey(scheduleJob.getJobName(), scheduleJob.getJobGroup()); 
    //任务触发 
    Trigger trigger = scheduler.getTrigger(triggerKey); 
    if (null == trigger) { 
      JobDetail jobDetail = JobBuilder.newJob((Class<? extends Job>) Class.forName(scheduleJob.getClazz())) 
       .withIdentity(scheduleJob.getJobName(), scheduleJob.getJobGroup()).build(); 
      jobDetail.getJobDataMap().put("scheduleJob", scheduleJob); 
       
      SimpleScheduleBuilder simpleScheduleBuilder = SimpleScheduleBuilder.simpleSchedule(); 
      if("秒".equals(scheduleJob.getTimeType()) ||  
          "second".equalsIgnoreCase(scheduleJob.getTimeType())){ 
        simpleScheduleBuilder.withIntervalInSeconds(scheduleJob.getTimeValue()).repeatForever(); 
      }else if("分".equals(scheduleJob.getTimeType()) || "分钟".equals(scheduleJob.getTimeType()) ||  
          "minute".equalsIgnoreCase(scheduleJob.getTimeType())){ 
        simpleScheduleBuilder.withIntervalInMinutes(scheduleJob.getTimeValue()).repeatForever(); 
      }else if("时".equals(scheduleJob.getTimeType()) || "小时".equals(scheduleJob.getTimeType()) ||  
          "hour".equalsIgnoreCase(scheduleJob.getTimeType())){ 
        simpleScheduleBuilder.withIntervalInHours(scheduleJob.getTimeValue()).repeatForever(); 
      }else if("天".equals(scheduleJob.getTimeType()) ||  
          "date".equalsIgnoreCase(scheduleJob.getTimeType())){ 
        simpleScheduleBuilder.withIntervalInHours(scheduleJob.getTimeValue()).repeatForever(); 
      } 
      ScheduleBuilder<SimpleTrigger> schedBuilder = simpleScheduleBuilder.withMisfireHandlingInstructionNextWithRemainingCount(); 
       
      trigger =TriggerBuilder.newTrigger().withIdentity(scheduleJob.getJobName(), scheduleJob.getJobGroup()) 
          .withSchedule(schedBuilder).build(); 
      trigger = TriggerBuilder.newTrigger().withIdentity(scheduleJob.getJobName(), scheduleJob.getJobGroup()).withSchedule(schedBuilder).build(); 
      scheduler.scheduleJob(jobDetail, trigger); 
      log.info(CC.LOG_PREFIX + "新增简单任务:"+JasonUtils.Object2String(scheduleJob)); 
    }else { 
      this.updateJobCron(scheduleJob); 
    } 
  } 
需要注意是的,当定时任务只执行一次时,就要仔细看代码,如上面的简单定时任务,刚开始是我这样的:
simpleScheduleBuilder.withIntervalInSeconds(scheduleJob.getTimeValue()); 
结果只执行一次,而我需要的是不断循环执行,最后改成:
simpleScheduleBuilder.withIntervalInSeconds(scheduleJob.getTimeValue()).repeatForever(); 
可以看出,后面多了个:repeatForever(),表示永远重复。  如果是希望执行多少次后不执行,就使用:.withRepeatCount(triggerRepeatCount),如下:
simpleScheduleBuilder.withIntervalInHours(scheduleJob.getTimeValue()).withRepeatCount(triggerRepeatCount); 
如有疑问请留言或者到本站社区交流讨论,感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!
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