firehol/netdata

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

package mongo

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

    "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("mongodb", module.Creator{
        JobConfigSchema: configSchema,
        Create:          func() module.Module { return New() },
        Config:          func() any { return &Config{} },
    })
}

func New() *Mongo {
    return &Mongo{
        Config: Config{
            URI:     "mongodb://localhost:27017",
            Timeout: confopt.Duration(time.Second),
            Databases: matcher.SimpleExpr{
                Includes: []string{},
                Excludes: []string{},
            },
        },

        conn: &mongoClient{},

        charts:                chartsServerStatus.Copy(),
        addShardingChartsOnce: &sync.Once{},

        optionalCharts: make(map[string]bool),
        replSetMembers: make(map[string]bool),
        databases:      make(map[string]bool),
        shards:         make(map[string]bool),
    }
}

type Config struct {
    UpdateEvery int                `yaml:"update_every,omitempty" json:"update_every"`
    URI         string             `yaml:"uri" json:"uri"`
    Timeout     confopt.Duration   `yaml:"timeout,omitempty" json:"timeout"`
    Databases   matcher.SimpleExpr `yaml:"databases,omitempty" json:"databases"`
}

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

    charts                *module.Charts
    addShardingChartsOnce *sync.Once

    conn mongoConn

    dbSelector     matcher.Matcher
    optionalCharts map[string]bool
    databases      map[string]bool
    replSetMembers map[string]bool
    shards         map[string]bool
}

func (m *Mongo) Configuration() any {
    return m.Config
}

func (m *Mongo) Init() error {
    if err := m.verifyConfig(); err != nil {
        m.Errorf("config validation: %v", err)
        return err
    }

    if err := m.initDatabaseSelector(); err != nil {
        m.Errorf("init database selector: %v", err)
        return err
    }

    return nil
}

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

func (m *Mongo) Charts() *module.Charts {
    return m.charts
}

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

    if len(mx) == 0 {
        m.Warning("no values collected")
        return nil
    }

    return mx
}

func (m *Mongo) Cleanup() {
    if m.conn == nil {
        return
    }
    if err := m.conn.close(); err != nil {
        m.Warningf("cleanup: error on closing mongo conn: %v", err)
    }
}