## 使用hystrix来实现监控超时
```go
package main
import (
"fmt"
"github.com/afex/hystrix-go/hystrix"
"math/rand"
"time"
)
type Product struct {
ID int
Title string
Price int
}
func getProduct() (Product, error) {
r := rand.Intn(10)
if r < 6 { //模拟api卡顿和超时效果
time.Sleep(time.Second * 4)
}
return Product{
ID: 101,
Title: "Golang从入门到精通",
Price: 12,
}, nil
}
func main() {
rand.Seed(time.Now().UnixNano())
configA := hystrix.CommandConfig{ //创建一个hystrix的config
Timeout: 3000, //command运行超过3秒就会报超时错误
}
hystrix.ConfigureCommand("get_prod", configA) //hystrix绑定command
for {
err := hystrix.Do("get_prod", func() error { //使用hystrix来讲我们的操作封装成command
p, _ := getProduct() //这里会随机延迟0-4秒
fmt.Println(p)
return nil
}, nil)
if err != nil {
fmt.Println(err)
}
}
}
```
