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package collector
import "github.com/prometheus/client_golang/prometheus"
// Scraper 所有指标收集需要满足2个方法 name返回指标名字来用于用户开关指标的 可以理解为所有指标都必须满足这个约定
//
//等同于我们一个接口切片，将结构体赋值给接口 但是结构体需要满足接口的方法，
//
//go的接口继承类似于鸭子 接口定义了鸭子长什么样子也就是需要实现的方法，那么我们实现了这些方法的结构体就是一只鸭子 然后map中的k是一个接口 我们赋予的是一个结构体 结构体实现了接口的方法， 那么我们就可以吧结构体赋值给接口
type Scraper interface {
// Name of the Scraper. Should be unique.
Name ( ) string
// Help describes the role of the Scraper.
// Example: "Collect from SHOW ENGINE INNODB STATUS"
//Help() string
// Scrape collects data from client and sends it over channel as prometheus metric.
Scrape ( ch chan <- prometheus . Metric ) error
}
