Developer Jahia 8.2

Is it possible to reschedule a BackgroundJob?

Question

Is it possible to have a BackgroundJob and, if some prerequisites are not met, reschedule the job for a later time when the conditions are probably met?

Answer

It is not possible but you can declare a new BackgroundJob programmatically and to define a SimpleTrigger with a specific time.

For example

private void rescheduleJob(){
    final JobDetail jobDetail = BackgroundJob.createJahiaJob("Job Title", Job.class);
    final JobDataMap jobMap = new JobDataMap();
    jobDetail.setJobDataMap(jobMap);
    final SimpleTrigger trigger = getSimpleTrigger(jobDetail);
    schedulerService.getScheduler().scheduleJob(jobDetail, trigger);
}

private SimpleTrigger getSimpleTrigger(JobDetail jobDetail) {
    Calendar calendar = Calendar.getInstance();
    calendar.add(Calendar.HOUR, 2);
    SimpleTrigger trigger = new SimpleTrigger(jobDetail.getName() + "Trigger", jobDetail.getGroup(), calendar.getTime());
    trigger.setMisfireInstruction(SimpleTrigger.MISFIRE_INSTRUCTION_FIRE_NOW);
    trigger.setPriority(3);
    return trigger;
}

Here is some interesting source code: