Quartz 阻止在 jobToBeExecuted 上执行作业

Question

我的目标是创建一个队列系统，我可以在其中为每个组指定最大并发作业数，即对于组 A，最多 3 个作业应该同时运行，对于组 B 最大 Y作业等。作业可以按 cron 计划执行，也可以使用 SimpleTrigger 执行一次，因此在安排作业时我无法检查队列，我必须在执行之前或期间检查它。我正在实施一个 joblistener，我试图阻止在 jobToBeExecuted() 方法中执行。我试过 scheduler.interrupt() 但当作业尚未开始时它不起作用。 scheduler.deletejob() 和 scheduler.unschedule() 也没有阻止它执行。

有什么想法吗？

public class JobQueueListener implements JobListener {

@Override
public void jobToBeExecuted(JobExecutionContext context) {
     JobKey currentJobKey = context.getJobDetail().getKey();
     JobDetail jobDetail = context.getJobDetail();
     Scheduler scheduler = context.getScheduler();

     if (shouldBePutInQueue(currentJobKey)) {
          /// Prevent execution and put in queue here, but how?
     }
}

@Override
public void jobWasExecuted(JobExecutionContext context, JobExecutionException jobException) {
       //Check queue and execute next in queue
}

}

Answer 1

你能看看吗TriggerListener

您应该实施 TriggerListener 并在 "vetoJobExecution" 方法中包含您的中止逻辑。

boolean vetoJobExecution(Trigger trigger,
                     JobExecutionContext context)

Its Called by the Scheduler when a Trigger has fired, and it's associated JobDetail is about to be executed. If the implementation vetos the execution (via returning true), the job's execute method will not be called.

Quartz 阻止在 jobToBeExecuted 上执行作业

Quartz prevent job execution on jobToBeExecuted

java

quartz-scheduler

quartz