Go 限流-令牌桶

package main

import (
	"context"
	"fmt"
	limt "go.uber.org/ratelimit"
	"golang.org/x/time/rate"
	"github.com/juju/ratelimit"
	"time"
)

func Demo1()  {
	r1 := limt.New(100)
	prev := time.Now()
	for i :=0;i<100;i++{
		now := r1.Take()
		fmt.Println(i,now.Sub(prev))
		prev = now
	}
}

//令牌桶
func Demo2()  {
	limiter := rate.NewLimiter(3,5)
	ctx ,cancel := context.WithCancel(context.Background())
	defer cancel()
	for i :=0;i<100;i++{
		fmt.Printf("time:%s\n",time.Now().Format("2006-01-02 15:04:05.000"))
		limiter.Wait(ctx) //每秒消费三个
		fmt.Println(i)
	}
}

//令牌桶
func Demo3()  {
	limt := ratelimit.NewBucket(100,10)
	for i :=0;i<100;i++{
		now := limt.Take(5)
		fmt.Println(i,now)
		fmt.Println(i)
	}
}

func main() {
	//Demo1()
	Demo2()
	//Demo3()
}