[aerogear-dev] FCM topic: use on alias as well ?

Matthias Wessendorf matzew at apache.org
Tue May 30 08:43:46 EDT 2017


on FCM related push, we do, in our client SDK, automatically subscribe a
client to an annoymous topic, matching our immutable variant ID.

If users are specifying categories, we do map those into topics as well.

This is the related code in our Android SDK:

How do people feel about doing that for the alias as well ?

In the past we did not do it, since topics used to be a more restricted
resource. Remember, the first notion of topics (GCM v3, at that time) were
even limiting the number of max. subscribers?

However, that changed, and I think it would be nice if we just use the
topics for each alias of the app as well. This would speed up the time to
deliver the push request to the FCM backend, since the UPS would no longer
need to look up the device, a push, regardless how many devices, means one
small HTTP to Google, per alias (aka topic)

Any thoughts ?

NOTE: There is a general limit of topic abuse, but that's on the app
instance (see [1]), so our APP Developers need to make sure they don't go
crazy w/ a gazillion of categories ;-)


[1] https://firebase.google.com/docs/cloud-messaging/admin/errors

Matthias Wessendorf

blog: http://matthiaswessendorf.wordpress.com/
twitter: http://twitter.com/mwessendorf
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