import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.serialization.StringDeserializer;

public static void main(String[] args) throws IOException {
        // create consumer properties
        Properties properties = new Properties();
        properties.setProperty(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
        properties.setProperty(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class.getName());
        properties.setProperty(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class.getName());
        properties.setProperty(ConsumerConfig.GROUP_ID_CONFIG, "my-first-application");
        properties.setProperty(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");

        // create consumer
        KafkaConsumer<String, String> consumer = new KafkaConsumer<String, String>(properties);

        // subscribe consumer to our topic(s)
        consumer.subscribe(Arrays.asList("testing"));

        //poll for new data
        while(true){
            log.info("Polling for new data");
            ConsumerRecords<String, String> records = consumer.poll(5000);

            for (ConsumerRecord<String, String> record : records) {
               log.info("Key: " + record.key() + ", Value: " + record.value());
               log.info("Partition: " + record.partition() + ", Offset: " + record.offset());
               String message = record.value();
        }
    }