How to pass instance variables into Quartz job?

Question

I wonder how to pass an instance variable externally in Quartz?

Below is pseudo code I would like to write. How can I pass externalInstance into this Job?

Answer 1

This is the responsibility of the JobFactory. The default PropertySettingJobFactory implementation will invoke any bean-setter methods, based on properties found in the schdeuler context, the trigger, and the job detail. So as long as you have implemnted an appropriate setContext() setter method you should be able to do any of the following:

scheduler.getContext().put("context", context);

Or

Trigger trigger = TriggerBuilder.newTrigger()
  ...
  .usingJobData("context", context)
  .build()

Or

JobDetail job = JobBuilder.newJob(SimpleJob.class)
  ...
  .usingJobData("context", context)
  .build()

Or if that isn't enough you can provide your own JobFactory class which instantiates the Job objects however you please.