Zabbix

/*

** Zabbix

** Copyright (C) 2001-2023 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 log

​

import (

    "fmt"

    "runtime"

    "time"

    "unsafe"

​

    "git.zabbix.com/ap/plugin-support/conf"

    "git.zabbix.com/ap/plugin-support/plugin"

    "zabbix.com/internal/agent"

    "zabbix.com/pkg/glexpr"

    "zabbix.com/pkg/itemutil"

    "zabbix.com/pkg/zbxlib"

)

​

type Options struct {

    plugin.SystemOptions `conf:"optional"`

    MaxLinesPerSecond    int `conf:"range=1:1000,default=20"`

}

​

// Plugin -

type Plugin struct {

    plugin.Base

    options Options

}

​

type metadata struct {

    key       string

    params    []string

    blob      unsafe.Pointer

    lastcheck time.Time

}

​

func (p *Plugin) Configure(global *plugin.GlobalOptions, options interface{}) {

    if err := conf.Unmarshal(options, &p.options); err != nil {

        p.Warningf("cannot unmarshal configuration options: %s", err)

    }

​

    zbxlib.SetMaxLinesPerSecond(p.options.MaxLinesPerSecond)

}

​

func (p *Plugin) Validate(options interface{}) error {

    var o Options

    return conf.Unmarshal(options, &o)

}

​

func (p *Plugin) Export(key string, params []string, ctx plugin.ContextProvider) (result interface{}, err error) {

    if ctx == nil || ctx.ClientID() <= agent.MaxBuiltinClientID {

        return nil, fmt.Errorf(`The "%s" key is not supported in test or single passive check mode`, key)

    }

    meta := ctx.Meta()

    var data *metadata

    if meta.Data == nil {

        data = &metadata{key: key, params: params}

        runtime.SetFinalizer(data, func(d *metadata) { zbxlib.FreeActiveMetric(d.blob) })

        if data.blob, err = zbxlib.NewActiveMetric(key, params, meta.LastLogsize(), meta.Mtime()); err != nil {

            return nil, err

        }

        meta.Data = data

    } else {

        data = meta.Data.(*metadata)

        if !itemutil.CompareKeysParams(key, params, data.key, data.params) {

            zbxlib.FreeActiveMetric(data.blob)

            data.key = key

            data.params = params

            // recreate if item key has been changed

            if data.blob, err = zbxlib.NewActiveMetric(key, params, meta.LastLogsize(), meta.Mtime()); err != nil {

                return nil, err

            }

        }

    }