如何设置Kafka使用者配置以从现在开始使用消息？

Question

我是Kakfa的新手，并继续学习如何在Kafka主题之间产生和使用消息。

我正在使用@EnableKafka使用Kafka配置

@EnableKafka
@Configuration
public class ConsumerConfig implements ApplicationContextAware {

    @Value("${kafka.servers}")
    private String kafkaServerAddress;

    @Value("${kafka.ca.groupid}")
    private String groupId;


    private ApplicationContext context;

    public DefaultKafkaConsumerFactory<String, Object> consumerFactory() {

        Map<String, Object> props = new HashMap<>();
        return new DefaultKafkaConsumerFactory<>(props);
    }

    @Bean
    public ConcurrentKafkaListenerContainerFactory<String, Object> binlogListenerContainerFactory() {
        ConcurrentKafkaListenerContainerFactory<String, Object> factory = new ConcurrentKafkaListenerContainerFactory<>();
        DefaultKafkaConsumerFactory<String, Object> defaultFactory = consumerFactory();
        defaultFactory.setKeyDeserializer(new StringDeserializer());
        defaultFactory.setValueDeserializer(new JsonDeserializer(BinlogMessage.class));
        factory.setConsumerFactory(defaultFactory);
        return factory;
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        context = applicationContext;
    }

}

Answer 1

得到答案，可以通过将属性AUTO_OFFSET_RESET_CONFIG设置为最新，如下所示：

public DefaultKafkaConsumerFactory<String, Object> consumerFactory() {

    Map<String, Object> props = new HashMap<>();
    props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "latest");
    return new DefaultKafkaConsumerFactory<>(props);
}