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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)
}
 

golang串联编程