golang kafka clickhouse 服务

• By Admin
• 3年前

主要是API 接收数据 插入到kafka ，然后监听kafka 保存到clickhouse中

package server

import (
   "fmt"
   "github.com/segmentio/kafka-go"
   log "github.com/sirupsen/logrus"
   "io/ioutil"
   "net/http"
   "os"
   "time"
)

type Producer struct {
   ID string
}

func producerHandler(kafkaWriter *kafka.Writer) func(http.ResponseWriter, *http.Request) {
   return func(wrt http.ResponseWriter, req *http.Request) {
      t := time.Now()
      body, err := ioutil.ReadAll(req.Body)
      if err != nil {
         log.Fatalln(err)
      }

      msg := kafka.Message{
         Key:   []byte(fmt.Sprintf("address-%s", req.RemoteAddr)),
         Value: body,
      }

      err = kafkaWriter.WriteMessages(req.Context(), msg)
      elapsed := time.Since(t)
      fmt.Println("app elapsed----:", elapsed)

      if err != nil {
         _, _ = wrt.Write([]byte(err.Error()))
         log.Fatalln(err)
      }
   }
}

func getKafkaWriter(kafkaURL, topic string) *kafka.Writer {
   return &kafka.Writer{
      Addr:         kafka.TCP(kafkaURL),
      Topic:        topic,
      Balancer:     &kafka.LeastBytes{},
      BatchTimeout: 10 * time.Nanosecond,
      ReadTimeout:  100 * time.Millisecond,
      WriteTimeout: 100 * time.Millisecond,
   }
}

func (Producer) Send(http.ResponseWriter, *http.Request) interface{} {
   // get kafka writer using environment variables.
   kafkaURL := "127.0.0.1:9092"
   topic := "topic1"
   chExit := make(chan os.Signal)
   go func() {
      mux := http.NewServeMux()
      kafkaWriter := getKafkaWriter(kafkaURL, topic)
      defer kafkaWriter.Close()
      // Add handle func for producer.
      mux.HandleFunc("/", producerHandler(kafkaWriter))
      // Run the web server.
      fmt.Println("start producer-api ... !!")
      log.Fatal(http.ListenAndServe("127.0.0.1:8098", mux))
   }()
   //主进程阻塞直到有退出信号
   s := <-chExit
   log.Info("Get signal:", s)
   return nil
}