If a user doesn’t activate their account, we’ll get an orphaned registration (or account). We have to clean up the database periodically, and what works better for periodically jobs than a timer? This is where scheduled tasks come into play. Because timers can be very sensitive to errors within the same thread, we’ll do this scheduling asynchronously.
Scheduler
Timers are available within Enterprise Java Beans (EJBs). Alumni uses a central class to invoke timed events: the Scheduler class, annotated as @Singleton. Any method that should be invoked by a timer will be ...
