java - 我如何使用 Kafka Consumer 的动态主题

Question

下面给出 Kafka 的配置来定位服务器 @ bean 公共(public) ConsumerFactory ConsumerFactory() { 映射配置 = new HashMap<>();

    config.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "127.0.0.1:9092");
    config.put(ConsumerConfig.GROUP_ID_CONFIG, "group_id");
    config.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
    config.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);

    return new DefaultKafkaConsumerFactory<>(config);
}


@Bean
public ConcurrentKafkaListenerContainerFactory<String, String> kafkaListenerContainerFactory() {
    ConcurrentKafkaListenerContainerFactory<String, String> factory = new 
    ConcurrentKafkaListenerContainerFactory();
    factory.setConsumerFactory(consumerFactory());
    return factory;
}



here I need to change the topic as a dynamic content
@KafkaListener(topics = "mytopic")
private void consume2(String Data) {
    String userID = null;
    String topic = null;
    String message = null;
    System.out.println(Data);
}

Answer 1

你有没有尝试过类似的事情

@KafkaListener(topics = "${kafka.topics}")

并将其设置为环境变量或应用程序属性？

环境变量KAFKA_TOPICS=mytopicapplication.properties kafka.topics=mytopic