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Chapter 6
Push Messaging
Lauren Collins
P
that enables apps to update users as
new content arrives. Users have the ability to turn push notications
on and o per app, or to control the type of notication (sound, on screen,
or badges). Instant messages and simple mail transfer protocol (SMTP)
email are also examples of push systems. Stock market data, auctions,
monitoring, sensor networking, and online gaming are all updated via
push- enabled apps as well.
Push services are ultimately derived from information and preferences
that are expressed or selected in advance. Developers have been work-
ing on this type of technolog ...