GCM to FCM - Where to add Server Key and handling MessageException

Question

I'm doing migration according to deprecated of GCM from back end side. Adding Admin SDK

dependencies {
  implementation 'com.google.firebase:firebase-admin:5.11.0'
}

After that, I do send message as follow

String registrationToken = "YOUR_REGISTRATION_TOKEN";
// See documentation on defining a message payload.
Message message = Message.builder()
    .putData("score", "850")
    .putData("time", "2:45")
    .setToken(registrationToken)
    .build();

// Send a message to the device corresponding to the provided
String response = FirebaseMessaging.getInstance().sendAsync(message);

There are 2 questions in here:

1. How do we set the key here? in GCM, we can do by new Sender(GCM_key).send(Message) but I can't find how to set key here. I don't think method setToken is used for setting key.

2. How do we handle exception here? In the library, there's a class named FirebaseMessageException extend Exception, so how to handle it?

Any solution will be appreciated.

Thank you

Answer 1

1. When using the Admin SDK to send FCM messages, you don't need to set the Server Key anywhere in the request, the Admin SDK as it's named, has an Administrator-like privileges when it comes to the Firebase Services, so messages sent using it is automatically authorized.

2. As stated in the sendAsync() docs:

Returns: An ApiFuture that will complete with a message ID string when the message has been sent.

From the returned ApiFuture , I presume you would just add a listener (ie addListener() ) or use the ApiFutures util class.