firehol/netdata

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

package postfix

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

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

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

func init() {
    module.Register("postfix", module.Creator{
        JobConfigSchema: configSchema,
        Defaults: module.Defaults{
            UpdateEvery: 10,
        },
        Create: func() module.Module { return New() },
        Config: func() any { return &Config{} },
    })
}

func New() *Postfix {
    return &Postfix{
        Config: Config{
            BinaryPath: "/usr/sbin/postqueue",
            Timeout:    confopt.Duration(time.Second * 2),
        },
        charts: charts.Copy(),
    }
}

type Config struct {
    UpdateEvery int              `yaml:"update_every,omitempty" json:"update_every"`
    Timeout     confopt.Duration `yaml:"timeout,omitempty" json:"timeout"`
    BinaryPath  string           `yaml:"binary_path,omitempty" json:"binary_path"`
}

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

        charts *module.Charts

        exec postqueueBinary
    }
    postqueueBinary interface {
        list() ([]byte, error)
    }
)

func (p *Postfix) Configuration() any {
    return p.Config
}

func (p *Postfix) Init() error {
    if err := p.validateConfig(); err != nil {
        p.Errorf("config validation: %s", err)
        return err
    }

    pq, err := p.initPostqueueExec()
    if err != nil {
        p.Errorf("postqueue exec initialization: %v", err)
        return err
    }
    p.exec = pq

    return nil
}

func (p *Postfix) Check() error {
    mx, err := p.collect()
    if err != nil {
        p.Error(err)
        return err
    }

    if len(mx) == 0 {
        return errors.New("no metrics collected")
    }

    return nil
}

func (p *Postfix) Charts() *module.Charts {
    return p.charts
}

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

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

    return mx
}

func (p *Postfix) Cleanup() {}