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 Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

package redis

​

import (

    "github.com/mediocregopher/radix/v3"

    "golang.zabbix.com/sdk/zbxerr"

)

​

type slowlog []interface{}

type logItem = []interface{}

​

// getLastSlowlogID gets the last log item ID from slowlog.

func getLastSlowlogID(sl slowlog) (int64, error) {

    if len(sl) == 0 {

        return 0, nil

    }

​

    item, ok := sl[0].(logItem)

    if !ok {

        return 0, zbxerr.ErrorCannotParseResult

    }

​

    if len(item) == 0 {

        return 0, zbxerr.ErrorCannotParseResult

    }

​

    id, ok := item[0].(int64)

    if !ok {

        return 0, zbxerr.ErrorCannotParseResult

    }

​

    return id + 1, nil

}

​

// slowlogHandler gets an output of 'SLOWLOG GET 1' command and returns the last slowlog Id.

func slowlogHandler(conn redisClient, _ map[string]string) (interface{}, error) {

    var res []interface{}

​

    if err := conn.Query(radix.Cmd(&res, "SLOWLOG", "GET", "1")); err != nil {

        return nil, zbxerr.ErrorCannotFetchData.Wrap(err)

    }

​

    lastID, err := getLastSlowlogID(slowlog(res))

​

    return lastID, err

}