CODEWITHSUNDEEP
push-notificationpush
vent
vent

Reputation: 1073

How Push Notification Services really work?

I am trying to understand how exactly push notification services work. Are these real push services with constant connection to server or just mimics by polling? How does a server with heavy traffic maintain so many connections?

Upvotes: 2

Views: 1089

Answers (2)

user
user

Reputation: 719

Fusio is correct. For mobile phones, a single push service is typically used (Google cloud messaging for android, Apple Push Notification Service for Apple/iPhone) to limit the amount of connections from the phone. 3rd party applications register to these services and push messages through them.

Upvotes: 1

fusio
fusio

Reputation: 3675

In general push notifications work both by establishing a long-lived TCP connection, or using long-polling. The maximum number of connected clients is determined by the server resources.

Take a look at the Socket.io protocol stack for an example. Or better yet, at the XMPP/Jabber protocol, which relies on TCP principally and falls back on long polling.

Upvotes: 3

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