[Yanel-dev] Integration of quartz scheduler

[Michael Wechner]

Hi

I have started the integration of the quartz scheduler, which was rather 
simple (according to 
http://www.quartz-scheduler.org/docs/quick_start_guide.html)

Now the actual design questions arise:

- How do we want to make this scheduler available to the resources?

If we want to keep Yanel itself independent of the actual scheduler 
framework (like for example Quartz), then my suggestion would be to 
create an interface

interface ScheduableV1 {
    void setScheduler(QuartzScheduler);
    QuartzScheduler getScheduler();
}

because this allows to introduce new scheduler frameworks at some later 
stage.

One could argue that there is not much out there than the Quartz 
Scheduler and we rather couple it to the realm, which
leads to another design question:

- What about cross-scheduling in between realms?

I could imagine there are case which require something like this, just 
as cross-reading/writing of content, but
in most cases I would argue that people don't want to allow to see the 
scheduled jobs of other realms.

- The third questions then would be how do we connect access controlling 
with scheduling?

I am sure there are more design questions, but let's get started 
somewhere and I think the above are some good starting points ;-)

Cheers

Michael