Implement Consumer interface after version upgrade

Question

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I have old project with org.apache.kafka:kafka-clients:0.9.0.0-mapr-1801-streams-6.0.0 into which I have the following code:

public class KafkaMessageConsumer<T extends Message> extends DelegateConsumer<T> implements SubscribeAction {

  private static final Logger logger = LoggerFactory.getLogger(KafkaMessageConsumer.class);

  @Override
  public void createSubscriber(Subscribe subscribe, ClientConfig clientConfig) {
    ConfigurableConsumer<T> configurableConsumer = createConfigurableConsumer();
    ...............
  }

  ConfigurableConsumer<T> createConfigurableConsumer() {
    return new ConfigurableConsumer<>();
  }

}

After migration to org.apache.kafka:kafka-clients:1.1.1-mapr-1808-streams-6.1.0

I have:

public class KafkaMessageConsumer<T extends Message> extends DelegateConsumer<T> implements SubscribeAction {

  private static final Logger logger = LoggerFactory.getLogger(KafkaMessageConsumer.class);

  @Override
  public void createSubscriber(Subscribe subscribe, ClientConfig clientConfig) {
    ConfigurableConsumer<T> configurableConsumer = createConfigurableConsumer();
    .......
  }

  ConfigurableConsumer<T> createConfigurableConsumer() {
    return new ConfigurableConsumer<>();
  }

  @Override
  public void subscribe(Collection<String> topics) {
    
  }

  @Override
  public void subscribe(Collection<String> topics, ConsumerRebalanceListener callback) {

  }

  @Override
  public void assign(Collection<TopicPartition> partitions) {

  }

  @Override
  public void subscribe(Pattern pattern) {

  }

  @Override
  public void seekToBeginning(Collection<TopicPartition> partitions) {

  }

  @Override
  public void seekToEnd(Collection<TopicPartition> partitions) {

  }

  @Override
  public Set<TopicPartition> paused() {
    return null;
  }

  @Override
  public void pause(Collection<TopicPartition> partitions) {

  }

  @Override
  public void resume(Collection<TopicPartition> partitions) {

  }

  @Override
  public Map<TopicPartition, OffsetAndTimestamp> offsetsForTimes(Map<TopicPartition, Long> timestampsToSearch) {
    return null;
  }

  @Override
  public Map<TopicPartition, Long> beginningOffsets(Collection<TopicPartition> partitions) {
    return null;
  }

  @Override
  public Map<TopicPartition, Long> endOffsets(Collection<TopicPartition> partitions) {
    return null;
  }

  @Override
  public void close(long timeout, TimeUnit unit) {

  }
}

As you can see I have to implement a lot of methods. What will happen of I leave them empty? is this going to break the entire app?

Answer 1

只要您留空的所有方法都未被您使用或不需要在其他任何地方使用，那么将方法留空不会破坏或影响应用程序中的任何内容。