[Engine-devel] [backend] a little confusion about the quartz jobs

[Laszlo Hornyak]

hi,

I was playing with the quartz jobs in the backend and I thought this is an area where some simplification and/or cleanup would be useful.

 - SchedulerUtil interface would be nice to hide quartz from the rest of the code, but it very rarely used, the clients are bound to it's single implementation, SchedulerUtilQuartzImpl through it's getInstance() method.
 - It was designed to be a local EJB, Backend actually expects it to be injected. (this field is not used)
 - when scheduling a job, you call schedule...Job(Object instance, String methodName, ...) however, it is not the _methodname_ that the executor will look for
 - instead, it will check the OnTimerMethodAnnotation on all the methods. But this annotation has everywhere the methodName as value
 - JobWrapper actually iterates over all the methods to find the one with the right annotation

So a quick simplification could be:
 - The annotation is not needed, it could be removed
 - JobWrapper could just getMethod(methodName, argClasses) instead of looking for the annotation in all of the methods
 - I am really not for factoryes, but if we want to separate the interface from the implementation, then probably a SchedulerUtilFactory could help here. The dummy implementation would do just the very same thing as the SchedulerUtilQuartzImpl.getInstance()
 - I would remove the reference to SchedulerUtil from Backend as well, since it is not used. Really _should_ the Backend class do any scheduling?

Please share your thoughts.

Thank you,
Laszlo