改變Quartz作業時間表

Question

我正在研究用Quartz調度我的應用程序，但在所有情況下，作業觸發器似乎都是一次性活動，並且對觸發器的更改需要重新部署應用程序生效。
有沒有什麼辦法可以讓我的作業觸發器檢查作業調度的更改，而無需重新部署代碼？
謝謝，

Answer 1

1. 陷阱一些用戶驅動的事件，如更新文本值，例如一個cron串來安排工作
2. 找到並取消調度/刪除舊的作業和觸發器。

3. 使用新觸發器再次安排作業。

   public static <T> T scheduleCronJob(Class<T> clazz, String cronString, String uid){ 
       try{    
        if(cronString == null){ 
         throw new CronStringConfigurationException(); 
        } 
   
        String jobGroupName = "cronJobsGroup"; 
        String jobName = "cronJob" + uid; 
        String triggerGroupName = "cronTriggers"; 
        String triggerName = "triggerFor" + uid; 
   
        JobDetail jobDetail = new JobDetail(jobName, jobGroupName, clazz); 
   
        CronTrigger trigger = new CronTrigger(
          triggerName, triggerGroupName, 
          jobName, jobGroupName, 
          cronString); 
   
        JobDataMap jobDataMap = new JobDataMap(); 
        jobDetail.setJobDataMap(jobDataMap); 
   
        getScheduler().scheduleJob(jobDetail, trigger); 
       } catch(Exception e){ 
       // print error message, throw stack trace 
       } 
       return null; 
   } 
   
   public static void reloadCronJob(Class clazz, String cronString, String uid) throws SystemException, ParseException, SchedulerException, 
       CronStringConfigurationException, PortalException{ 
       // locate the job 
       String jobGroupName = "cronJobs"; 
       String jobName = "jobFor" + uid; 
   
       if(cronString == null){ 
        throw new CronStringConfigurationException(); 
       } 
   
       JobDetail jobDetail = null; 
       Class<?> jobClass = null; 
   
       // remove the old job/trigger if it exists 
       try{ 
        jobDetail = scheduler.getJobDetail(jobName, jobGroupName); 
        if(jobDetail != null){ 
         jobClass = jobDetail.getJobClass(); 
        } 
        scheduler.deleteJob(jobName, jobGroupName); 
       } catch(Exception e){ 
        e.printStackTrace(); 
       } 
   
       if(jobClass == null){ 
        jobClass = clazz; 
       } 
   
       // create a new trigger 
       scheduleCronJob(jobClass, expandoColumnName, uid); 
   
       System.out.println("(re)scheduled job " + jobName + " using new cron string " + cronString); 
   }