在非周期性时间间隔内调用Quartz Scheduler

Question

In quartz scheduler I have a doubt

For example

If we schedule job for every 5 minutes or 10 minutes or 2 hours it is ok we call scheduler using regular time interval like below no problem,

    SimpleTrigger simpleTrigger = new SimpleTrigger("mytrigger",sched.DEFAULT_GROUP,new Date(),null,SimpleTrigger.REPEAT_INDEFINITELY,30L*5000L);

But,If I schedule job @ 2'0 clock and 3'0 clock today then,tommorow I change it to 5'0 clock and 7'0 clock and 11'0 clock, my doubt is if fixed interval we call it in above way but it not fixed or periodic interval how do we handle it. Any suggestions or Ideas or examples regarding my query....

Answer 1

What you can do is define the intervals in a file or DB and read it from there.

Also define a JobListener .

Store the interval values in the JobDataMap and every time the job starts, use the listeners method jobToBeExecuted() and read the values from the file/DB and compare it with the values in the JobDataMap .

If they are the same, then no update was done and the job runs, if it was changed, reschedule the job using Scheduler.rescheduleJob(TriggerKey triggerKey,Trigger newTrigger) .

Note that there is a little problem with this method, the configuration will only change once the job runs, so even though you update the file/DB the next run would still be in the old time, and only the run after that would be in the new time.