package pool

import "log"
//具体任务,可以传参可以自定义操作
type Task struct {
    Args interface{}
    Do func(interface{})error
}
//协程的个数
var Nums int
//任务通道
var JobChannels =make(chan Task)
//入口的任务通道
var Jobs =make(chan Task)
//执行
func Run(){
    for i:=0;i<Nums;i++{
        go worker(i)
    }
    for task:=range Jobs{
        JobChannels<-task
    }
    close(JobChannels)
}
//实际的工作协程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"
)
//真正的模拟发送邮件
func SendEmail(email interface{})error{
    log.Println(email," start..")
    //模拟耗时
    time.Sleep(time.Second*10)
    return errors.New(email.(string)+" end..")
}
//获取邮箱并发送
func GetEmails(){
    //如果数据量比较大分页获取
    page:=1;
    for{
        //模拟每页获取的邮箱
        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,
            }
            //每个邮箱任务塞入任务通道
            pool.Jobs <- sendEmailTask
        }
        log.Printf("page %d done!\n",page)
        page++
    }
}
func TestPool(t *testing.T) {
    //定义5个协程
    pool.Nums = 5
    //开个子协程去不停的获取邮箱
    go GetEmails()
    //执行
    pool.Run()
}