AsyncUtils.java

public static <T> Tuple2<Future<T>, AsyncCallback<T>> make() {
        final Promise<T> promise = Promise.make();
        final AsyncCallback<T> callback = new AsyncCallback<T>() {
            @Override
            public void onFailure(final Throwable throwable) {
                promise.failure(throwable);
            }
            @Override
            public void onSuccess(final T t) {
                promise.success(t);
            }
        };
        return Tuple.of(promise.future(), callback);
}