Kafka监听多个主题

方式一：使用@KafkaListener的topicPatter属性，通配.*   注意"."不要忽略

1.引入依赖

        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
        </dependency>

2.配置yaml文件

spring:
  kafka:
    topics: test.*

3.消费者监听

@Component
@Slf4j
public class KafkaConsumer {

    @KafkaListener(topicPattern = "${spring.kafka.topics}",groupId = "${spring.kafka.consumer.group-id}")
    public void consumer(ConsumerRecord<?, ?> record, Acknowledgment ack, @Header(KafkaHeaders.RECEIVED_TOPIC) String topic) {
        try {
            Optional message = Optional.ofNullable(record.value());
            if (message.isPresent()) {
                String msg = String.valueOf(message.get());

                log.info("topic:{}，is consumed success,topic:{}" + topic + ",msg:" + msg);
            }
        } catch (Exception e) {
            log.error("topic:{},is consumed error:{}",topic,e.getMessage());
        } finally {
            ack.acknowledge();
        }
    }

}

 

方式二：使用@KafkaListener的topics属性，此时配置的是数组列表，注意用英文逗号分隔

1.引入依赖，同方式一

2.配置yaml文件

spring:
  kafka:
    topics: test1,test2,test3

3.消费者监听

@Component
@Slf4j
public class KafkaConsumer {

    @KafkaListener(topics = "#{'${spring.kafka.topics}'.split(',')}", groupId = "${spring.kafka.consumer.group-id}")
    public void consumer(ConsumerRecord<?, ?> record, Acknowledgment ack, @Header(KafkaHeaders.RECEIVED_TOPIC) String topic) {
        try {
            Optional message = Optional.ofNullable(record.value());
            if (message.isPresent()) {
                String msg = String.valueOf(message.get());
                log.info("Received topic:{},msg:{}" , topic,msg);

            }
        } catch (Exception e) {
            log.error("topic:{},is consumed error:{}", topic, e.getMessage());
        } finally {
            ack.acknowledge();
        }
    }

}