Zabbix

/*

** Zabbix

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software; you can redistribute it and/or modify

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

** This program is distributed in the hope that it will be useful,

** but WITHOUT ANY WARRANTY; without even the implied warranty of

** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

** GNU General Public License for more details.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

package plugin

​

import (

    "fmt"

    "reflect"

    "regexp"

    "unicode"

)

​

type Metric struct {

    Plugin      Accessor

    Key         string

    Description string

}

​

var Metrics map[string]*Metric = make(map[string]*Metric)

var Plugins map[string]Accessor = make(map[string]Accessor)

​

func registerMetric(plugin Accessor, name string, key string, description string) {

    if ok, _ := regexp.MatchString(`^[A-Za-z0-9\._-]+$`, key); !ok {

        panic(fmt.Sprintf(`cannot register metric "%s" having invalid format`, key))

    }

​

    if 0 == len(description) {

        panic(fmt.Sprintf(`cannot register metric "%s" with empty description`, key))

    }

​

    if unicode.IsLower([]rune(description)[0]) {

        panic(fmt.Sprintf(`cannot register metric "%s" with description without capital first letter: "%s"`, key, description))

    }

​

    if description[len(description)-1] != '.' {

        panic(fmt.Sprintf(`cannot register metric "%s" without dot at the end of description: "%s"`, key, description))

    }

​

    if _, ok := Metrics[key]; ok {

        panic(fmt.Sprintf(`cannot register duplicate metric "%s"`, key))

    }

​

    t := reflect.TypeOf(plugin)

    for i := 0; i < t.NumMethod(); i++ {

        method := t.Method(i)

        switch method.Name {

        case "Export":