Build Basic Watcher Class

[FosterSamuel]

The Watcher class will use the SchedulerExecutorService to call a Reminder's notify method on its specific time interval. (see #3) It will do setup this repeated call in a method called schedule(reminderObject).

Relevant docs for SchedulerExecutorService: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ScheduledExecutorService.html

The Watcher class will also feature a stop(reminder) method, but that will be subject to change depending on how the Reminder object evolves to send notifications to the main driver class.

[FosterSamuel]

Basic scheduling is in. Every timeInterval seconds, the scheduled reminder's remind() method is called on of the available threads. The neat benefit of the scheduledThreadPool is that if a thread is idle or fails, the program doesn't come to a halt.

Missing:

• cancelReminder(Reminder reminder) method which cancels a scheduled reminder by pulling it from activeReminders and using createRunnableCancelFor() to schedule an immediate cancellation