Kafka实践

1. kafka发送方法

@Component
@Import(KafkaAutoProperties.class)
public class KafkaProducer {

    @Autowired
    private KafkaConfigProperties kafkaConfigProperties;

    public void send(String topic, String msg) {
        //1、准备配置文件
        Properties props = new Properties();
        props.put("bootstrap.servers", kafkaConfigProperties.getBootstrapServers());
        props.put("acks", kafkaConfigProperties.getAcks());
        props.put("retries", kafkaConfigProperties.getRetries());
        props.put("batch.size", kafkaConfigProperties.getBatchSize());
        props.put("linger.ms", kafkaConfigProperties.getLingerMs());
        props.put("buffer.memory", kafkaConfigProperties.getBufferMemory());
        props.put("key.serializer", kafkaConfigProperties.getKeySerializer());
        props.put("value.serializer", kafkaConfigProperties.getValueSerializer());
        //2、创建KafkaProducer
//        org.apache.kafka.clients.producer.KafkaProducer<String, String> kafkaProducer = new org.apache.kafka.clients.producer.KafkaProducer<String, String>(props);
        //3、发送数据
//        kafkaProducer.send(new ProducerRecord<String, String>(topic, msg));

        IEventHandle kafkaHandle = new KafkaEventHandle(props, topic);
        kafkaHandle.process(msg);
    }
}

2.消息发送接口

public interface MessageService {

    public void sendWhenShipUpdate(String value);
}

3.消息发送实现类

@Service
public class MessageServiceImpl implements MessageService {
    @Autowired
    private KafkaProducer kafkaProducer;

    @Override
    public void sendWhenShipUpdate(String value) {
        if(org.apache.commons.lang3.StringUtils.isBlank(value)){
            throw new ApiException("船信息不能为空");
        }
        JSONObject message = new JSONObject();
        message.put("dataType", "shipInfoUpdate");
        JSONObject data = new JSONObject();
        data.put("value", value);
        message.put("data", data);
        kafkaProducer.send("TransportDataUpdate", StringUtils.replaceBack(message.toJSONString().replace("\\","")));

    }
}

4.代码中发送消息

messageService.sendWhenShipUpdate(s);