kafka_0">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Groupprivate String groupId = Constants.KAFKA_AI_SERVER_GROUP;@Beanpublic 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);}@Beanpublic 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();}}