Spring Cloud Stream确定主题Kafka消息来自

Question

My @StreamListener listening for multiple Kafka topics(totally like 10 topics) specified in spring.cloud.stream.bindings.input.destination property.

Is there any way to determine the topic message came from inside the @StreamListener annotated method? I wouldn't like to configure bindings for all topics separately and write 10 almost identical StreamListeners.

Answer 1

See KafkaHeaders. RECEIVED_TOPIC KafkaHeaders. RECEIVED_TOPIC you can specify a separate parameter on the @StreamListener method. Something like this in Spring Kafka docs:

@KafkaListener(id = "qux", topicPattern = "myTopic1")
public void listen(@Payload String foo,
    @Header(KafkaHeaders.RECEIVED_MESSAGE_KEY) Integer key,
    @Header(KafkaHeaders.RECEIVED_PARTITION_ID) int partition,
    @Header(KafkaHeaders.RECEIVED_TOPIC) String topic,
    @Header(KafkaHeaders.RECEIVED_TIMESTAMP) long ts
        ) {
    ...
}

https://docs.spring.io/spring-kafka/reference/htmlsingle/#kafka-listener-annotation