Examples with KafkaConsumerGroupClient io.confluent.ksql.services.KafkaConsumerGroupClient used on opensource projects

Example 1 with KafkaConsumerGroupClient

use of io.confluent.ksql.services.KafkaConsumerGroupClient in project ksql by confluentinc.

the class ListTopicsExecutor method execute.

public static StatementExecutorResponse execute(final ConfiguredStatement<ListTopics> statement, final SessionProperties sessionProperties, final KsqlExecutionContext executionContext, final ServiceContext serviceContext) {
    final KafkaTopicClient client = serviceContext.getTopicClient();
    final Map<String, TopicDescription> topicDescriptions = listTopics(client, statement);
    if (statement.getStatement().getShowExtended()) {
        final KafkaConsumerGroupClient consumerGroupClient = new KafkaConsumerGroupClientImpl(serviceContext::getAdminClient);
        final Map<String, List<Integer>> topicConsumersAndGroupCount = getTopicConsumerAndGroupCounts(consumerGroupClient);
        final List<KafkaTopicInfoExtended> topicInfoExtendedList = topicDescriptions.values().stream().map(desc -> topicDescriptionToTopicInfoExtended(desc, topicConsumersAndGroupCount)).collect(Collectors.toList());
        return StatementExecutorResponse.handled(Optional.of(new KafkaTopicsListExtended(statement.getStatementText(), topicInfoExtendedList)));
    } else {
        final List<KafkaTopicInfo> topicInfoList = topicDescriptions.values().stream().map(ListTopicsExecutor::topicDescriptionToTopicInfo).collect(Collectors.toList());
        return StatementExecutorResponse.handled(Optional.of(new KafkaTopicsList(statement.getStatementText(), topicInfoList)));
    }
}

Example 2 with KafkaConsumerGroupClient

use of io.confluent.ksql.services.KafkaConsumerGroupClient in project ksql by confluentinc.

the class ListTopicsExecutor method getTopicConsumerAndGroupCounts.

/**
 * @return all topics with their associated consumerCount and consumerGroupCount
 */
private static Map<String, List<Integer>> getTopicConsumerAndGroupCounts(final KafkaConsumerGroupClient consumerGroupClient) {
    final List<String> consumerGroups = consumerGroupClient.listGroups();
    final Map<String, AtomicInteger> topicConsumerCount = new HashMap<>();
    final Map<String, Set<String>> topicConsumerGroupCount = new HashMap<>();
    for (final String group : consumerGroups) {
        final Collection<ConsumerSummary> consumerSummaryList = consumerGroupClient.describeConsumerGroup(group).consumers();
        for (final KafkaConsumerGroupClientImpl.ConsumerSummary summary : consumerSummaryList) {
            for (final TopicPartition topicPartition : summary.partitions()) {
                topicConsumerCount.computeIfAbsent(topicPartition.topic(), k -> new AtomicInteger()).incrementAndGet();
                topicConsumerGroupCount.computeIfAbsent(topicPartition.topic(), k -> new HashSet<>()).add(group);
            }
        }
    }
    final HashMap<String, List<Integer>> results = new HashMap<>();
    topicConsumerCount.forEach((k, v) -> {
        results.computeIfAbsent(k, v1 -> new ArrayList<>()).add(v.intValue());
        results.get(k).add(topicConsumerGroupCount.get(k).size());
    });
    return results;
}