How to use

getAllBrokersInCluster

method

in

kafka.zk.KafkaZkClient

/**
 * Generates the Kafka bootstrap connection string from the metadata stored in Zookeeper.
 * Allows for backwards compatibility of the zookeeperConnect configuration.
 */
private String lookupBootstrap(String zookeeperConnect, SecurityProtocol securityProtocol) {
 try (KafkaZkClient zkClient = KafkaZkClient.apply(zookeeperConnect,
     JaasUtils.isZkSecurityEnabled(), ZK_SESSION_TIMEOUT, ZK_CONNECTION_TIMEOUT, 10,
     Time.SYSTEM, "kafka.server", "SessionExpireListener")) {
  List<Broker> brokerList =
      JavaConverters.seqAsJavaListConverter(zkClient.getAllBrokersInCluster()).asJava();
  List<BrokerEndPoint> endPoints = brokerList.stream()
      .map(broker -> broker.brokerEndPoint(
        ListenerName.forSecurityProtocol(securityProtocol))
      )
      .collect(Collectors.toList());
  List<String> connections = new ArrayList<>();
  for (BrokerEndPoint endPoint : endPoints) {
   connections.add(endPoint.connectionString());
  }
  return StringUtils.join(connections, ',');
 }
}

Collection<Broker> brokers = scala.collection.JavaConversions.asJavaCollection(zkClient.getAllBrokersInCluster());

/**
 * Generates the Kafka bootstrap connection string from the metadata stored in Zookeeper.
 * Allows for backwards compatibility of the zookeeperConnect configuration.
 */
private String lookupBootstrap(String zookeeperConnect, SecurityProtocol securityProtocol) {
 try (KafkaZkClient zkClient = KafkaZkClient.apply(zookeeperConnect,
     JaasUtils.isZkSecurityEnabled(), ZK_SESSION_TIMEOUT, ZK_CONNECTION_TIMEOUT, 10,
     Time.SYSTEM, "kafka.server", "SessionExpireListener")) {
  List<Broker> brokerList =
      JavaConverters.seqAsJavaListConverter(zkClient.getAllBrokersInCluster()).asJava();
  List<BrokerEndPoint> endPoints = brokerList.stream()
      .map(broker -> broker.brokerEndPoint(
        ListenerName.forSecurityProtocol(securityProtocol))
      )
      .collect(Collectors.toList());
  List<String> connections = new ArrayList<>();
  for (BrokerEndPoint endPoint : endPoints) {
   connections.add(endPoint.connectionString());
  }
  return StringUtils.join(connections, ',');
 }
}