We have an app. App can register to different servers: Server1 and Server2.
Now, Server1 and Server2 wants to send push notifications to an app independently. How to solve it using GCM?
I don't know how to implement in the sense of SenderID, registration token. Can an app has one SenderID for every app server? Should I has a one SenderID and generates different registration token for every app server?
Now, Server1 and Server2 wants to send push notifications to an app independently. How to solve it using GCM?
Have each server create their own FCM project (it seems you're a new user so it would be advisable to proceed using FCM now), each would have it's own SenderId, which the client would be generating a token for each (see my answer here or here).
Then have the servers send to their corresponding tokens as needed.
Can an app has one SenderID for every app server?
Yup. See what I mentioned above.
Should I has a one SenderID and generates different registration token for every app server?
Yup. It's the correct approach, see what mentioned above.
