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

[Summers Pittman]

On Tue, May 30, 2017 at 9:32 AM, Oleh Mackiv <omatskiv at redhat.com> wrote:

> Hi,
> I think this very much depends on what is the actual limit for number of
> topics.
>
> Consider this use case, that would max out topics very quickly:
> - register alias for each user
> - if user has multiple devices, all his devices will have same alias
> - if you want to notify some user, you just send notification to his alias
> and UPS will distribute it to all devices that this user has registere
>
> We even suggest this in docs[1]:
> "alias: A list of one or more *identifiers* (such as email or username)
> to send messages to *ALL* devices of the user(s)"
>
>
> P.S: Do you know how much topics you can actually register before you hit
> the "messaging/too-many-topics" error ?
>

I think it isn't set.  Google has not been very open with the limits on the
topic mechanism. (At one point there was a one million subscriber limit).
Regardless, I think we can probably beef up UPS to fall back to standard
sending mechanisms if we get errors, it can eve be part of our value add.


>
>
> [1] https://aerogear.org/docs/unifiedpush/push-message-
> format/#query-component
>
>
>
> On Tue, May 30, 2017 at 2:43 PM, Matthias Wessendorf <matzew at apache.org>
> wrote:
>
>> Hi,
>>
>> 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:
>> https://github.com/aerogear/aerogear-android-push/blob/maste
>> r/aerogear-android-push/src/main/java/org/jboss/aerogear/
>> android/unifiedpush/fcm/AeroGearFCMPushRegistrar.java#L188-L193
>>
>> 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 ;-)
>>
>> -Matthias
>>
>>
>> [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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>> aerogear-dev at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/aerogear-dev
>>
>
>
>
> --
> Oleg Matskiv
> Associate Quality Engineer
> Red Hat Mobile Application Platform
> omatskiv at redhat.com
>
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>
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