Unable to inject service in Apache isis quartz

I am using quartz in my apache isis project for scheduling. I have a class MyJob which implements org.quartz.Job and it has method execute which is called when scheduler triggers at given time.

My problem is, I have a class DemoService and it has a method showDemo() which I want to call from the execute method. But when the scheduler runs, it throws Null Pointer Exception at demoService.showDemo().

I have not been able to inject any service in that class. It always gives NPE. How can I inject a service into the MyJob class?

Here is the code:-

public class MyJob implements Job {

    @Inject
    DemoService demoService;

    public MyJob() {

    }

    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        demoService.showDemo();
    }
}

The easiest approach is to put the logic you want to run in a subclass of AbstractIsisSessionTemplate, and then instantiate and execute it from your quartz job.

This technique is used by the Incode Platform's quartz job to run background commands, see here; the quartz module shows this from the quartz perspective (which I think you already have figured out).

HTH Dan