package pool

import "log"
//具體任務(wù),可以傳參可以自定義操作
type Task struct {
    Args interface{}
    Do func(interface{})error
}
//協(xié)程的個數(shù)
var Nums int
//任務(wù)通道
var JobChannels =make(chan Task)
//入口的任務(wù)通道
var Jobs =make(chan Task)
//執(zhí)行
func Run(){
    for i:=0;i<Nums;i++{
        go worker(i)
    }
    for task:=range Jobs{
        JobChannels<-task
    }
    close(JobChannels)
}
//實際的工作協(xié)程worker
func worker(workId int){
    for task:=range JobChannels{
        ret:=task.Do(task.Args)
        log.Printf("worker_id:%d , worker_ret:%v\n",workId,ret)
    }
}

package test
import (
    "errors"
    "gofly/pool"
    "log"
    "testing"
    "time"
)
//真正的模擬發(fā)送郵件
func SendEmail(email interface{})error{
    log.Println(email," start..")
    //模擬耗時
    time.Sleep(time.Second*10)
    return errors.New(email.(string)+" end..")
}
//獲取郵箱并發(fā)送
func GetEmails(){
    //如果數(shù)據(jù)量比較大分頁獲取
    page:=1;
    for{
        //模擬每頁獲取的郵箱
        emails:=[]string{
            "1@qq.com",
            "2@qq.com",
            "3@qq.com",
            "4@qq.com",
            "5@qq.com",
            "6@qq.com",
            "7@qq.com",
        }
        for _,email:=range emails{
            var sendEmailTask=pool.Task{
                Args: email,
                Do: SendEmail,
            }
            //每個郵箱任務(wù)塞入任務(wù)通道
            pool.Jobs <- sendEmailTask
        }
        log.Printf("page %d done!\n",page)
        page++
    }
}
func TestPool(t *testing.T) {
    //定義5個協(xié)程
    pool.Nums = 5
    //開個子協(xié)程去不停的獲取郵箱
    go GetEmails()
    //執(zhí)行
    pool.Run()
}