We have a published app that currently is using C2DM and we would like to
move to the new GCM service.
The migration
document<http://developer.android.com/guide/google/gcm/c2dm.html>on this
subject from Google is pretty straight forward but it does not
clarify a couple of important questions:
1. If all we did was enable the GCM service to start the development of
the new version of the app, would that affect our existing C2DM process for
our published version? I would think the answer is "NO" but since we do not
want to disrupt the service we provide to our existing customers, we would
like to be sure before moving forward.
2. In order to avoid any disruption of service with our existing
customers we are planning on keeping track of wether a device has the old
C2DM Registration ID or the new GCM Registration ID. The process would be
as follows: If it is a new customer who downloaded our new version of the
app with GCM, it is pretty straight forward and they will obtain the new
Reg ID when they start the app, which will get reported to our servers. But
if this is an existing user who upgraded from the old application with
C2DM, they already have their device registered with the old C2DM
registration ID with our servers, so there are two possibilities:
- They updated the app and they started the app right after. In this
case they would obtain a new GCM Registration ID and that would get
reported to our servers. So, no issues anticipated here.
- They updated the app, but did not immediately start the app. In
this case our server would still have the old C2DM Reg ID. Our plan is to
have two server side push notifications services during the transition
period to handle this scenario (and also support all the old users who
decided not to upgrade the app). If the user has the old Registration ID,
the old push notification service will send the notification the way we
have been doing before. If the user has a new GCM Reg ID we will be using
the new GCM push service on the server. Dose anyone see a problem with
this
logic?
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