获取服务结合随机算法

package util

import (
    "math/rand"
    "time"
)

type LoadBalance struct {
    Servers []*ServiceInfo
}

func NewloadBalance(servers []*ServiceInfo) *LoadBalance  {
    return &LoadBalance{Servers:servers}
}
func(this *LoadBalance) getByRand(sname string ) *ServiceInfo{
    tmp:=make([]*ServiceInfo,0)
    for _,service:=range this.Servers{
        if service.ServiceName==sname{
            tmp=append(tmp,service)
        }
    }
    if len(tmp)==0 {
        return nil
    }
    rand.Seed(time.Now().UnixNano())
    i:=rand.Intn(len(tmp)-1)
    return this.Servers[i]
}