package main

import (
	"fmt"
	"sarama/serve"

	"github.com/go-ini/ini"
)

type KafkaConfig struct {
	Address     string `ini:"address"`
	ChannelSize int    `ini:"chan_size"`
}
type TailConfig struct {
	Path     string `ini:"path"`
	Filename string `ini:"fileName"`
	// 如果是結構體，則指明分區名
	Children `ini:"tailfile.children"`
}
type Config struct {
	KafkaConfig `ini:"kafka"`
	TailConfig  `ini:"tailfile"`
}
type Children struct {
	Name string `ini:"name"`
}

func main() {
	// 加載配置
	var cfg = new(Config)
	err := ini.MapTo(cfg, "./conf/go-conf.ini")
	if err != nil {
		fmt.Print(err)
	}
	// 初始化kafka
	ks := &serve.KafukaServe{}
	// 啟動kafka消息監聽。異步
	ks.InitKafka([]string{cfg.KafkaConfig.Address}, int64(cfg.KafkaConfig.ChannelSize))
	// 關閉主協程時，關閉channel
	defer ks.Destruct()

	// 初始化tail
	ts := &serve.TailServe{}
	ts.TailInit(cfg.TailConfig.Path + "/" + cfg.TailConfig.Filename)
	// 阻塞
	ts.Listener(ks.MsgChan)

}

package serve

import (
	"fmt"

	"github.com/Shopify/sarama"
)

type KafukaServe struct {
	MsgChan chan string
	//err         error
}

func (ks *KafukaServe) InitKafka(addr []string, chanSize int64) {

	// 讀取配置
	config := sarama.NewConfig()
	// 1. 初始化生產者配置
	config.Producer.RequiredAcks = sarama.WaitForAll
	// 選擇分區
	config.Producer.Partitioner = sarama.NewRandomPartitioner
	// 成功交付的信息
	config.Producer.Return.Successes = true

	ks.MsgChan = make(chan string, chanSize)

	go ks.Listener(addr, chanSize, config)

}

func (ks *KafukaServe) Listener(addr []string, chanSize int64, config *sarama.Config) {
	//  連接kafka
	var kafkaClient, _ = sarama.NewSyncProducer(addr, config)
	defer kafkaClient.Close()
	for {
		select {
		case content := <-ks.MsgChan:
			//
			msg := &sarama.ProducerMessage{
				Topic: "weblog",
				Value: sarama.StringEncoder(content),
			}
			partition, offset, err := kafkaClient.SendMessage(msg)
			if err != nil {
				fmt.Println(err)
			}
			fmt.Println("分區，偏移量：")
			fmt.Println(partition, offset)
			fmt.Println("___")
		}

	}
}

func (ks *KafukaServe) Destruct() {
	close(ks.MsgChan)
}

package serve

import (
	"fmt"

	"github.com/hpcloud/tail"
)

type TailServe struct {
	tails *tail.Tail
}

func (ts *TailServe) TailInit(filenName string) {
	config := tail.Config{
		ReOpen:    true,
		Follow:    true,
		Location:  &tail.SeekInfo{Offset: 0, Whence: 2},
		MustExist: false,
		Poll:      true,
	}
	// 打開文件開始讀取數據

	ts.tails, _ = tail.TailFile(filenName, config)

	// if err != nil {
	// 	fmt.Println("tails %s failed,err:%v\n", filenName, err)
	// 	return nil, err
	// }
	fmt.Println("啟動," + filenName + "監聽")
}

func (ts *TailServe) Listener(MsgChan chan string) {
	for {
		msg, ok := <-ts.tails.Lines
		if !ok {
			// todo
			fmt.Println("數據接收失敗")
			return
		}
		fmt.Println(msg.Text)
		MsgChan <- msg.Text
	}
}

// 測試案例
func Demo() {
	filename := `E:\xx.log`
	config := tail.Config{
		ReOpen:    true,
		Follow:    true,
		Location:  &tail.SeekInfo{Offset: 0, Whence: 2},
		MustExist: false,
		Poll:      true,
	}
	// 打開文件開始讀取數據
	tails, err := tail.TailFile(filename, config)
	if err != nil {
		fmt.Println("tails %s failed,err:%v\n", filename, err)
		return
	}
	var (
		msg *tail.Line
		ok  bool
	)
	fmt.Println("啟動")
	for {
		msg, ok = <-tails.Lines
		if !ok {
			fmt.Println("tails file close reopen,filename:$s\n", tails.Filename)
		}
		fmt.Println("msg:", msg.Text)
	}
}