firehol/netdata

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

package beanstalk

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

    "github.com/netdata/netdata/go/plugins/logger"
    "github.com/netdata/netdata/go/plugins/pkg/matcher"
    "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("beanstalk", module.Creator{
        JobConfigSchema: configSchema,
        Create:          func() module.Module { return New() },
        Config:          func() any { return &Config{} },
    })
}

func New() *Beanstalk {
    return &Beanstalk{
        Config: Config{
            Address:      "127.0.0.1:11300",
            Timeout:      confopt.Duration(time.Second * 1),
            TubeSelector: "*",
        },

        charts:             statsCharts.Copy(),
        newConn:            newBeanstalkConn,
        discoverTubesEvery: time.Minute * 1,
        tubeSr:             matcher.TRUE(),
        seenTubes:          make(map[string]bool),
    }
}

type Config struct {
    UpdateEvery  int              `yaml:"update_every,omitempty" json:"update_every"`
    Address      string           `yaml:"address" json:"address"`
    Timeout      confopt.Duration `yaml:"timeout,omitempty" json:"timeout"`
    TubeSelector string           `yaml:"tube_selector,omitempty" json:"tube_selector"`
}

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

    charts *module.Charts

    newConn func(Config, *logger.Logger) beanstalkConn
    conn    beanstalkConn

    discoverTubesEvery    time.Duration
    lastDiscoverTubesTime time.Time
    discoveredTubes       []string
    tubeSr                matcher.Matcher
    seenTubes             map[string]bool
}

func (b *Beanstalk) Configuration() any {
    return b.Config
}

func (b *Beanstalk) Init() error {
    if err := b.validateConfig(); err != nil {
        return fmt.Errorf("config validation: %v", err)
    }

    sr, err := b.initTubeSelector()
    if err != nil {
        return fmt.Errorf("failed to init tube selector: %v", err)
    }
    b.tubeSr = sr

    return nil
}

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

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

    return nil
}

func (b *Beanstalk) Charts() *module.Charts {
    return b.charts
}

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

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

    return mx
}

func (b *Beanstalk) Cleanup() {
    if b.conn != nil {
        if err := b.conn.disconnect(); err != nil {
            b.Warningf("error on disconnect: %s", err)
        }
        b.conn = nil
    }
}