spring boot kafka 在一个监听器中使用多个主题 [英] Consume multiple topics in one listener in spring boot kafka

问题描述

谁能给我一个 spring boot kafka 的小例子，我们可以在一个监听器类中使用多个主题.

Can anyone provide me a small example in spring boot kafka where we can consume multiple topics in one single listener class.

推荐答案

application.yml

my:
    kafka:
        conf:
            groupId: myId
            topics: topic1,topicN

你的听众:

@KafkaListener(groupId = "${my.kafka.conf.groupId}", topics = "#{'${my.kafka.conf.topics}'.split(',')}")
public void storeTopicsDataToMongo(
        @Header(KafkaHeaders.RECEIVED_TOPIC) String topic,
        @Header(required = false, name= KafkaHeaders.RECEIVED_MESSAGE_KEY) String key,
        @Payload(required = false) String record)
{
    log.trace(format("Received topic[%s] key[%s] payload[%s]", topic, key, record));
    //your code
}

或者您可以探索 @ConfigurationProperties 并自己创建 bean，例如:

or you can explore the @ConfigurationProperties and create the beans yourself, something like:

@Component
@ConfigurationProperties(prefix = "my.kafka.conf")
@Data //=> lombok
public class ConsumerConfigurationProperties {

    private String groupId;
    private List<String> topics;
}

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