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php_producer_serve.go
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/
php_producer_serve.go
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package main
import (
"context"
"fmt"
"net"
"net/rpc"
"strings"
"sync"
"github.com/spiral/goridge"
"github.com/segmentio/kafka-go"
"github.com/spf13/cobra"
)
type prodServFlag struct {
brokers string
port string
}
type PHPMessage struct {
Topic string
Content string
}
var (
prodFlagValue prodServFlag
writer *kafka.Writer
prodServCmd = &cobra.Command{
Use: "producerd",
Short: "producerd is a php producer server",
Args: cobra.ExactArgs(0),
Run: prodServ,
}
)
type Sender struct {
writerMap map[string]*kafka.Writer
wLock sync.Mutex
}
func (s *Sender) Send(data PHPMessage, r *string) error {
fmt.Printf("message at topic %s\n", data.Topic)
// get kafka writer
writer := s.getWriter(data.Topic)
byteData := []byte(data.Content)
err := writer.WriteMessages(context.Background(), kafka.Message{
Value: byteData,
})
if err != nil {
return err
}
return nil
}
func (s *Sender) getWriter(topic string) (writer *kafka.Writer) {
s.wLock.Lock()
defer s.wLock.Unlock()
writer, found := s.writerMap[topic]
if !found {
writer = kafka.NewWriter(kafka.WriterConfig{
Brokers: strings.Split(prodFlagValue.brokers, ","),
Topic: topic,
})
s.writerMap[topic] = writer
}
return
}
func prodServ(prodServCmd *cobra.Command, args []string) {
port := prodFlagValue.port
if !strings.HasPrefix(port, ":") {
port = ":" + port
}
ln, err := net.Listen("tcp", port)
if err != nil {
panic(err)
}
rpc.Register(&Sender{
writerMap: make(map[string]*kafka.Writer),
})
for {
conn, err := ln.Accept()
if err != nil {
continue
}
go rpc.ServeCodec(goridge.NewCodec(conn))
}
}
func init() {
prodServCmd.Flags().StringVar(&prodFlagValue.brokers, "brokers", "localhost:9092", "brokers, separated by ,")
prodServCmd.Flags().StringVar(&prodFlagValue.port, "port", ":8080", "port number")
}