Kafka-SpringBoot集成

• 导包&配置
• Producer
• Consumer

参考
https://blog.csdn.net/qq_21040559/article/details/122839376
https://blog.csdn.net/u011019141/article/details/108803361
https://segmentfault.com/a/1190000038909021
https://blog.csdn.net/supreme000/article/details/97794999
https://blog.csdn.net/yuanlong122716/article/details/105160545

pom.xml/project/dependencies 新增

        
            org.springframework.kafka
            spring-kafka
        

application.yaml新增

spring: 
	kafka:
	    bootstrap-servers: whfc.cc:9092,whfc.cc:9093
	    producer: # producer 生产者
	      retries: 0 # 重试次数
	      acks: 1 # 应答级别:多少个分区副本备份完成时向生产者发送ack确认(可选0、1、all/-1)
	      batch-size: 16384 # 批量大小
	      buffer-memory: 33554432 # 生产端缓冲区大小
	      key-serializer: org.apache.kafka.common.serialization.StringSerializer
	      value-serializer: org.apache.kafka.common.serialization.StringSerializer
	
	    consumer: # consumer消费者
	      group-id: bank # 默认的消费组ID
	      #    enable-auto-commit: true # 是否自动提交offset
	      #    auto-commit-interval: 100  # 提交offset延时(接收到消息后多久提交offset)
	      auto-offset-reset: latest
	      key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
	      value-deserializer: org.apache.kafka.common.serialization.StringDeserializer

@Component
@Slf4j
// 生产者（消息发送者）
public class Producer {

    @Autowired
    private KafkaTemplate kafkaTemplate;

    public void sendRecord(Orders orders) {
        kafkaTemplate.send(ConstString.TOPIC,orders.getId().toString());
        log.info("生成订单, ordersId={}",orders);
    }

}

@Component
public class MyConsumer {

    // private static final Logger LOGGER= LoggerFactory.getLogger("kafkaConsumer.class");

    @KafkaListener(topics = {ConstString.TOPIC})
    public void onMessage1(ConsumerRecord consumerRecord, Consumer consumer) throws MyException, InterruptedException {
        Optional optional = Optional.ofNullable(consumerRecord.value());
        
        
        // 业务代码
        
        // 手动完成消息确认（也可以自动配置：开启`enable-auto-commit`，同时参数不需要`consumer`，）
        consumer.commitAsync();
    }
}