Quartz Scheduler - How to get cron expression given job name and group name?

Hi,

I'm using Quartz Scheduler v.1.8.0.

How do I get the cron expression which was assigned/attached to a Job and scheduled using CronTrigger?  I have the job name and group name in this case.  Though many Triggers can point to the same Job, in my case it is only one.

There is a method available in Scheduler class, Scheduler.getTriggersOfJob(jobName, groupName), but it returns only Trigger array.

NOTE: Class CronTrigger extends Trigger
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ZoniacAsked:
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gremwellConnect With a Mentor Commented:
If there only one trigger per job, I would expect the array returned by getTriggersOfJob() contain one entry only. You can probably cast it (the first element of the array, not the array itself) to CronTrigger and invoke CronTrigger's getCronExpression() method.
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ZoniacAuthor Commented:
> I would expect the array returned by getTriggersOfJob() contain one entry only

Yes, you're right.  In my case, it is only one trigger per job.
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ZoniacAuthor Commented:
> You can probably cast it (the first element of the array, not the array  itself) to CronTrigger and invoke CronTrigger's getCronExpression()  method.

Yes, it works.

Code example shown below:

Trigger[] triggers = scheduler.getTriggersOfJob(jobName, groupName);
for (Trigger trigger : triggers) {
    if (trigger instanceof CronTrigger) {
        CronTrigger cronTrigger = (CronTrigger) trigger;
        String cronExpr = cronTrigger.getCronExpression();
    }
}

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ZoniacAuthor Commented:
Solution arrived.
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