Kafka: Get broker host from ZooKeeper

Question

For particular reasons I need to use both - ConsumerGroup (a.k.a. high-level consumer) and SimpleConsumer (a.k.a. low-level consumer) to read from

Answer 1

 public KafkaProducer(String zookeeperAddress, String topic) throws IOException,
        KeeperException, InterruptedException {

    this.zookeeperAddress = zookeeperAddress;
    this.topic = topic;

    ZooKeeper zk = new ZooKeeper(zookeeperAddress, 10000, null);
    List brokerList = new ArrayList();

    List ids = zk.getChildren("/brokers/ids", false);
    for (String id : ids) {
        String brokerInfoString = new String(zk.getData("/brokers/ids/" + id, false, null));
        Broker broker = Broker.createBroker(Integer.valueOf(id), brokerInfoString);
        if (broker != null) {
            brokerList.add(broker.connectionString());
        }
    }

    props.put("serializer.class", KAFKA_STRING_ENCODER);
    props.put("metadata.broker.list", String.join(",", brokerList));
    producer = new Producer(new ProducerConfig(props));
}