How to use

blockingGetToCallback

method

in

com.google.auth.oauth2.ServiceAccountJwtAccessCredentials

@Override
public void getRequestMetadata(final URI uri, Executor executor,
  final RequestMetadataCallback callback) {
 // It doesn't use network. Only some CPU work on par with TLS handshake. So it's preferrable
 // to do it in the current thread, which is likely to be the network thread.
 blockingGetToCallback(uri, callback);
}

@Override
public void getRequestMetadata(final URI uri, Executor executor,
  final RequestMetadataCallback callback) {
 // It doesn't use network. Only some CPU work on par with TLS handshake. So it's preferrable
 // to do it in the current thread, which is likely to be the network thread.
 blockingGetToCallback(uri, callback);
}