SpringBoot用kafka.listener监听接受Kafka消息

1.创建kafka监听配置并进行注册

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.common.serialization.StringDeserializer;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.annotation.EnableKafka;
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
import org.springframework.kafka.core.ConsumerFactory;
import org.springframework.kafka.core.DefaultKafkaConsumerFactory;
import org.springframework.kafka.listener.ContainerProperties;

import java.util.HashMap;
import java.util.Map;

/**
 * @author 35
 * @description kafka listen监听配置
 * @date 2024年04月24日 13:25
 */
@Configuration
@EnableKafka
public class KafkaConfig {


    // kafka实例
    @Value("${spring.kafka.bootstrap-servers}")
    private String bootstrapServers;

    // kafka AI 服务的Group
    private String groupId = Constants.KAFKA_AI_SERVER_GROUP;

    @Bean
    public ConsumerFactory<String, String> consumerFactory() {
        Map<String, Object> props = new HashMap<>();
        props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
        props.put(ConsumerConfig.GROUP_ID_CONFIG, groupId);
        props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        return new DefaultKafkaConsumerFactory<>(props);
    }

    @Bean
    public ConcurrentKafkaListenerContainerFactory<String, String> kafkaListenerContainerFactory() {
        ConcurrentKafkaListenerContainerFactory<String, String> factory = new ConcurrentKafkaListenerContainerFactory<>();
        factory.setConsumerFactory(consumerFactory());
        // 设置为可以手动消费
        factory.getContainerProperties().setAckMode(ContainerProperties.AckMode.MANUAL);
        return factory;
    }
}

2.使用示例

  @KafkaListener(topics = Constants.KAFKA_USER_TOPIC, groupId = Constants.KAFKA_SERVER_GROUP)
    public void syncUserByKafKa(String message, Acknowledgment ack) {
        try {
            // 调用具体的执行方法
             bb(message);

            // 提交kafka消费位移
            ack.acknowledge();
        } catch (Exception e) {
            log.error("失败:" + e.getMessage() + "消息：" + message);
        } finally {
            // 提交kafka消费位移
            ack.acknowledge();
        }

    }