springBoot集成kafka

在上篇成功安装和测试zk+kafka的基础上，我们集成kafka到springboot微服务中

1：依赖引入(版本对应) <dependency> <groupId>org.springframework.kafka</groupId> <artifactId>spring-kafka</artifactId> </dependency> 2：kafka在application.yml中配置

spring:
    kafka:
        # kafka代理地址，集群配置以逗号分开  
        bootstrap-servers: 192.168.1.155:9092
        producer:
            retries: 0
            batch-size: 16384
            buffer-memory: 33554432
            key-serializer: org.apache.kafka.common.serialization.StringSerializer
            value-serializer: org.apache.kafka.common.serialization.StringSerializer
        consumer:
            #默认分组id
            group-id: appServer
            auto-offset-reset: earliest
            enable-auto-commit: true
            auto-commit-interval: 20000
            key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
            value-deserializer: org.apache.kafka.common.serialization.StringDeserializer

3：生产者配置

信息发送至kafka服务器的工具类

@Component
public class KafkaProducers {

    private static Logger log = LoggerFactory.getLogger(KafkaProducers.class);

    @Autowired
    private KafkaTemplate<String, String> kafkaTemplate;

    private Gson gson = new GsonBuilder().create();

    //发送消息方法
    public void send(String topic, Object message) {
        log.info("+++++++++++++++++++++  message = {}", gson.toJson(message));
        //topic-ideal为主题
        kafkaTemplate.send(topic, gson.toJson(message));
    }
}

生产者业务实现

/**
     * 报警分析数据发送到kafka服务
     * @param businessAnalysisBase
     */
    @Override
    public void sendWarningAnalysisMessage(BusinessAnalysisBase businessAnalysisBase) {
        kafkaProducers.send(BusinessConstant.ALARM_ANALYZED_EVENT,businessAnalysisBase);
        log.info("信息发送成功");
    }

消费者订阅

@Component
public class WarningAnalysisConsumer {
    private static Logger log = LoggerFactory.getLogger(WarningAnalysisConsumer.class);

    @KafkaListener(topics = {BusinessConstant.ALARM_ANALYZED_EVENT},groupId = "Test")
    public void consumer(ConsumerRecord<?, ?> record){
        Optional<?> kafkaMessage = Optional.ofNullable(record.value());
        if (kafkaMessage.isPresent()) {
            Object message = kafkaMessage.get();
            log.info("----------------- recordTest =" + record);
            log.info("------------------ messageTest =" + message);
        }
    }
}