Job Sheduler - OpenSymphony - Quartz

OpenSymphony - Quartz - Documentation
Parece ter bastante features legais esse scheduler, vale a pena conferir!

Sample uses of job scheduling with Quartz:

- Driving Workflow: As a new order is initially placed, schedule a Job to fire in exactly 2 hours, that will check the status of that order, and trigger a warning notification if an order confirmation message has not yet been received for the order, as well as changing the order's status to 'awaiting intervention'.

- System Maintenance: Schedule a job to dump the contents of a database into an XML file every business day (all weekdays except holidays) at 11:30 PM.