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C H A P T E R 1 7
Additional System Services
17-4
About Additional System Services
Figure 17-2
Alarm slip with Snooze button
Periodic Alarms
17
The periodic alarm service sends messages to your application at a specified time.
This can be used, for example, by an email client application to periodically log on
to a server to check for incoming messages.
The interface to the periodic alarm service is the system-supplied
protoPeriodicAlarmEditor
, shown in Figure 17-3. You can create views
from this proto to allow the user of your application to schedule periodic alarms.
When the alarm times scheduled in this view come up, a message is sent to your
application.
Figure 17-3
A view based on
protoPeriodicAlarmEditor
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