Admin SDK Migration Guide

The following versions of the Admin SDKs introduce a limited number of breaking changes:

• Java SDK 6.0.0
• Go SDK 3.0.0

The change with the broadest impact is the removal of the Java Task interface, which is replaced by the ApiFuture interface.

Additionally, there are changes to these features:

• Specifying authorization credentials for the Java SDK
• Configuring Realtime Database log levels
• Creating custom tokens and verifying ID tokens in Go

Admin Java SDK (6.0.0)

Use ApiFuture instead of Task

The deprecated Task interface has been removed. If your app uses this interface, update it to use the ApiFutures interface instead. For example:

Before

Task<String> customToken = FirebaseAuth.getInstance()
    .createCustomToken("uid");

After

String customToken = FirebaseAuth.getInstance()
    .createCustomToken("uid");

// Or

ApiFuture<String> customToken = FirebaseAuth.getInstance()
    .createCustomTokenAsync("uid");

For a detailed discussion of this change with advanced use case examples, see Asynchronous Operations with Admin Java SDK.

Migrate FirebaseCredentials to GoogleCredentials

FirebaseCredential and FirebaseCredentials are no longer available. To specify authorization credentials for the SDK, use GoogleCredentials instead. For example:

Before

FirebaseCredential credential = FirebaseCredentials.fromCertificate(stream);
FirebaseOptions options = new FirebaseOptions.Builder()
    .setCredential(credential)
    .build();

FirebaseCredential credential = FirebaseCredentials.applicationDefault();
FirebaseOptions options = new FirebaseOptions.Builder()
    .setCredential(credential)
    .build();

After

GoogleCredentials credentials = GoogleCredentials.fromStream(stream);
FirebaseOptions options = new FirebaseOptions.Builder()
    .setCredentials(credentials)
    .build();

GoogleCredentials credentials = GoogleCredentials.getApplicationDefault();
FirebaseOptions options = new FirebaseOptions.Builder()
    .setCredentials(credentials)
    .build();

Use SLF4J to configure logging

The FirebaseDatabase.setLogLevel() API is no longer available. Use SLF4J directly to configure logging for the entire SDK.

This change means that logging now can be configured without code changes. For more information see Logging in Java libraries for Firebase and Google Cloud.

Before

FirebaseDatabase.getInstance()
 .setLogLevel(Logger.Level.DEBUG);

After

• Add slf4j-simple.jar to the project classpath.
• Set the -Dorg.slf4j.simpleLogger.defaultLogLevel=debug system property for the JVM.
• Refer to SLF4J documentation for details about using other logging frameworks like Log4J and java.util.logging.

Admin Go SDK 3.0.0

Changes in auth.Client for Go

The CustomToken and CustomTokeWithClaims methods now take a context argument, like the majority of existing Go APIs.

Before

token, err := CustomToken("uid")

token, err := CustomToken("uid", claimsMap)

result, err := VerifyIDToken(idToken)

After

token, err := CustomToken(context.Background(), "uid")

token, err := CustomTokenWithClaims(context.Background(), "uid", claimsMap)

result, err := VerifyIDToken(context.Background(), idToken)