golang串联编程

package main

import (

"fmt"

_ "math/rand"

_ "time"

)

type EndPoint func(req interface{}) interface{}

type Middleware func(EndPoint) EndPoint

func Chain(others ...Middleware) Middleware {

return func(e EndPoint) EndPoint {

for i := len(others) - 1; i >= 0; i-- {

e = others[i](e)

}

return e

}

}

func genMiddleware(i int) Middleware {

return func(next EndPoint) EndPoint {

fmt.Println("flag...", i)

return next

}

}

func StartMain() {

var mids []Middleware

for i := 10; i > 0; i-- {

mids = append(mids, genMiddleware(i))

}

mid := Chain(mids...)

e := func(request interface{}) interface{} {

fmt.Println("start...")

return nil

}

finalfun := mid(e)

finalfun(3)

finalfun(3)

}