How to create a Kafka topic in Java – Kafka version

The below code is useful for creating the Kafka topic via Java code. Please note that the KAFKA_TOPIC and KAFKA_ZOOKEEPER_HOSTS are to be supplied as the VM arguments.

Sample values are given below

Replace MACHINE1_DOMAIN_NAME, MACHINE2_DOMAIN_NAME with appropriate domain name of your machine or the zookeeper server host machine

If you have only one Kafka server, then you can remove MACHINE2_DOMAIN_NAME from the KAFKA_ZOOKEEPER_HOSTS value. You can add as many as hosts separated by comma



import kafka.admin.AdminUtils;
import kafka.utils.ZKStringSerializer$;
import org.I0Itec.zkclient.ZkClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Properties;

public class KafkaTopicCreator {

    private static final Logger LOGGER = LoggerFactory.getLogger(KafkaTopicCreator.class);

    public static void main(String[] args) {

        String topicName = System.getEnv("KAFKA_TOPIC");
        String zookeeperHosts = System.getEnv("KAFKA_ZOOKEEPER_HOSTS");
        String kafkaBrokerHosts = System.getEnv("KAFKA_BROKER_HOSTS");
        int sessionTimeOut = 10000;
        int connectionTimeOut = 10000;"zookeeperHosts:{}", zookeeperHosts);
        ZkClient zkClient = new ZkClient(zookeeperHosts, sessionTimeOut, connectionTimeOut, ZKStringSerializer$.MODULE$);
        if (!AdminUtils.topicExists(zkClient, topicName)) {
            int replicationFactor = kafkaBrokerHosts.split(",").length;
            AdminUtils.createTopic(zkClient, topicName, 1, replicationFactor, new Properties());
        } else {
  "{} is available hence no changes are done");
        }"Topic Details:{}", AdminUtils.fetchTopicMetadataFromZk(topicName, zkClient));


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