Spring Quartz2 动态任务的实例详解

技术  /  管理员 发布于 7年前   136

Spring Quartz2 动态任务的实例详解

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); 

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