netdata/netdata

// SPDX-License-Identifier: GPL-3.0-or-later

//go:build linux
// +build linux

package logind

import (
    _ "embed"
    "errors"
    "time"

    "github.com/netdata/netdata/go/go.d.plugin/agent/module"
    "github.com/netdata/netdata/go/go.d.plugin/pkg/web"
)

//go:embed "config_schema.json"
var configSchema string

func init() {
    module.Register("logind", module.Creator{
        JobConfigSchema: configSchema,
        Defaults: module.Defaults{
            Priority: 59999, // copied from the python collector
        },
        Create: func() module.Module { return New() },
        Config: func() any { return &Config{} },
    })
}

func New() *Logind {
    return &Logind{
        Config: Config{
            Timeout: web.Duration(time.Second),
        },
        newLogindConn: func(cfg Config) (logindConnection, error) {
            return newLogindConnection(cfg.Timeout.Duration())
        },
        charts: charts.Copy(),
    }
}

type Config struct {
    UpdateEvery int          `yaml:"update_every,omitempty" json:"update_every"`
    Timeout     web.Duration `yaml:"timeout,omitempty" json:"timeout"`
}

type Logind struct {
    module.Base
    Config `yaml:",inline" json:""`

    charts *module.Charts

    conn          logindConnection
    newLogindConn func(config Config) (logindConnection, error)
}

func (l *Logind) Configuration() any {
    return l.Config
}

func (l *Logind) Init() error {
    return nil
}

func (l *Logind) Check() error {
    mx, err := l.collect()
    if err != nil {
        l.Error(err)
        return err
    }
    if len(mx) == 0 {
        return errors.New("no metrics collected")
    }
    return nil
}

func (l *Logind) Charts() *module.Charts {
    return l.charts
}

func (l *Logind) Collect() map[string]int64 {
    mx, err := l.collect()
    if err != nil {
        l.Error(err)
    }

    if len(mx) == 0 {
        return nil
    }
    return mx
}

func (l *Logind) Cleanup() {
    if l.conn != nil {
        l.conn.Close()
    }
}