class KafkaAdminClient extends AdminClient {

    @Override
    public ListConsumerGroupsResult listConsumerGroups(ListConsumerGroupsOptions options) {
        final KafkaFutureImpl<Collection<Object>> all = new KafkaFutureImpl<>();
        final long nowMetadata = time.milliseconds();
        final long deadline = calcDeadlineMs(nowMetadata, options.timeoutMs());
        runnable.call(new Call("findAllBrokers", deadline, new LeastLoadedNodeProvider()) {
            @Override
            MetadataRequest.Builder createRequest(int timeoutMs) {
                return new MetadataRequest.Builder(new MetadataRequestData()
                    .setTopics(Collections.emptyList())
                    .setAllowAutoTopicCreation(true));
            }

            @Override
            void handleResponse(AbstractResponse abstractResponse) {
                MetadataResponse metadataResponse = (MetadataResponse) abstractResponse;
                Collection<Node> nodes = metadataResponse.brokers();
                if (nodes.isEmpty())
                    throw new StaleMetadataException("Metadata fetch failed due to missing broker list");

                HashSet<Node> allNodes = new HashSet<>(nodes);
                final ListConsumerGroupsResults results = new ListConsumerGroupsResults(allNodes, all);

                for (final Node node : allNodes) {
                    final long nowList = time.milliseconds();
                    runnable.call(new Call("listConsumerGroups", deadline, new ConstantNodeIdProvider(node.id())) {
                        @Override
                        ListGroupsRequest.Builder createRequest(int timeoutMs) {
                            List<String> states = options.states()
                                    .stream()
                                    .map(s -> s.toString())
                                    .collect(Collectors.toList());
                            return new ListGroupsRequest.Builder(new ListGroupsRequestData().setStatesFilter(states));
                        }

                        private void maybeAddConsumerGroup(ListGroupsResponseData.ListedGroup group) {
                            String protocolType = group.protocolType();
                            if (protocolType.equals(ConsumerProtocol.PROTOCOL_TYPE) || protocolType.isEmpty()) {
                                final String groupId = group.groupId();
                                final Optional<ConsumerGroupState> state = group.groupState().equals("")
                                        ? Optional.empty()
                                        : Optional.of(ConsumerGroupState.parse(group.groupState()));
                                final ConsumerGroupListing groupListing = new ConsumerGroupListing(groupId, protocolType.isEmpty(), state);
                                results.addListing(groupListing);
                            }
                        }

                        @Override
                        void handleResponse(AbstractResponse abstractResponse) {
                            final ListGroupsResponse response = (ListGroupsResponse) abstractResponse;
                            synchronized (results) {
                                Errors error = Errors.forCode(response.data().errorCode());
                                if (error == Errors.COORDINATOR_LOAD_IN_PROGRESS || error == Errors.COORDINATOR_NOT_AVAILABLE) {
                                    throw error.exception();
                                } else if (error != Errors.NONE) {
                                    results.addError(error.exception(), node);
                                } else {
                                    for (ListGroupsResponseData.ListedGroup group : response.data().groups()) {
                                        maybeAddConsumerGroup(group);
                                    }
                                }
                                results.tryComplete(node);
                            }
                        }

                        @Override
                        void handleFailure(Throwable throwable) {
                            synchronized (results) {
                                results.addError(throwable, node);
                                results.tryComplete(node);
                            }
                        }
                    }, nowList);
                }
            }

            @Override
            void handleFailure(Throwable throwable) {
                KafkaException exception = new KafkaException("Failed to find brokers to send ListGroups", throwable);
                all.complete(Collections.singletonList(exception));
            }
        }, nowMetadata);

        return new ListConsumerGroupsResult(all);
    }

    private  KafkaAdminClient(AdminClientConfig config,
                             String clientId,
                             Time time,
                             AdminMetadataManager metadataManager,
                             Metrics metrics,
                             KafkaClient client,
                             TimeoutProcessorFactory timeoutProcessorFactory,
                             LogContext logContext);

}