Ideal java consumer

Consumer.java

package clients;

import io.confluent.monitoring.clients.interceptor.MonitoringConsumerInterceptor;
import java.time.Duration;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Properties;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRebalanceListener;
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.TopicPartition;
import org.apache.kafka.common.serialization.StringDeserializer;

public class Consumer {
  static final String KAFKA_TOPIC = "driver-positions";

  /**
   * Java consumer.
   */
  public static void main(String[] args) {
    System.out.println("Starting Java Consumer.");

    // Configure the group id, location of the bootstrap server, default deserializers,
    // Confluent interceptors
    final Properties settings = new Properties();
    settings.put(ConsumerConfig.GROUP_ID_CONFIG, "java-consumer");
    settings.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "kafka:9092");
    settings.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "latest");
    settings.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
    settings.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
    settings.put(ConsumerConfig.INTERCEPTOR_CLASSES_CONFIG, List.of(MonitoringConsumerInterceptor.class));

    // performance
    settings.put(ConsumerConfig.FETCH_MAX_WAIT_MS_CONFIG, "5000");
    settings.put(ConsumerConfig.FETCH_MIN_BYTES_CONFIG, "5000000");

    // disable auto commit
    // settings.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, false);

    final KafkaConsumer<String, String> consumer = new KafkaConsumer<>(settings);

    // guarantie ? 
    // niveau de commit : auto-commit (5 secs)
    // garantie un commit régulier après le traitement des messages
    // at least once
    try {
      // Subscribe to our topic
      consumer.subscribe(Arrays.asList(KAFKA_TOPIC), new ConsumerRebalanceListener() {
        @Override
        public void onPartitionsRevoked(Collection<TopicPartition> collection) {
          consumer.commitSync();
        }

        @Override
        public void onPartitionsAssigned(Collection<TopicPartition> collection) { }
      });
      while (true) { 
        // TODO: Poll for available records
        // Commit si plus de 5 secs avant le dernier commit
        final ConsumerRecords<String, String> records = consumer.poll(Duration.ofMillis(200));
        for (ConsumerRecord<String, String> record : records) {
          // TODO: print the contents of the record
          System.out.printf("Key: %s, Value: %s, Partition: %d\n", record.key(), record.value(), record.partition());
        }
        // consumer.commitSync();
        consumer.commitAsync();
      }
    } finally {
      // Clean up when the application exits or errors
      System.out.println("Closing consumer.");
      consumer.close();
    }
  }
}