[英]Implement Consumer interface after version upgrade
我有org.apache.kafka:kafka-clients:0.9.0.0-mapr-1801-streams-6.0.0
旧项目,其中包含以下代码:
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<>();
}
}
迁移到org.apache.kafka:kafka-clients:1.1.1-mapr-1808-streams-6.1.0
后
我有:
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) {
}
}
如您所见,我必须实现很多方法。 我让它们空着会发生什么? 这会破坏整个应用程序吗?
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。
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