netdata/netdata

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

package couchbase

import (
    _ "embed"
    "errors"
    "net/http"
    "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("couchbase", module.Creator{
        JobConfigSchema: configSchema,
        Defaults: module.Defaults{
            UpdateEvery: 5,
        },
        Create: func() module.Module { return New() },
        Config: func() any { return &Config{} },
    })
}

func New() *Couchbase {
    return &Couchbase{
        Config: Config{
            HTTP: web.HTTP{
                Request: web.Request{
                    URL: "http://127.0.0.1:8091",
                },
                Client: web.Client{
                    Timeout: web.Duration(time.Second),
                },
            },
        },
        collectedBuckets: make(map[string]bool),
    }
}

type Config struct {
    UpdateEvery int `yaml:"update_every,omitempty" json:"update_every"`
    web.HTTP    `yaml:",inline" json:""`
}

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

    httpClient *http.Client
    charts     *module.Charts

    collectedBuckets map[string]bool
}

func (cb *Couchbase) Configuration() any {
    return cb.Config
}

func (cb *Couchbase) Init() error {
    err := cb.validateConfig()
    if err != nil {
        cb.Errorf("check configuration: %v", err)
        return err
    }

    httpClient, err := cb.initHTTPClient()
    if err != nil {
        cb.Errorf("init HTTP client: %v", err)
        return err
    }
    cb.httpClient = httpClient

    charts, err := cb.initCharts()
    if err != nil {
        cb.Errorf("init charts: %v", err)
        return err
    }
    cb.charts = charts

    return nil
}

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

    }
    return nil
}

func (cb *Couchbase) Charts() *Charts {
    return cb.charts
}

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

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

func (cb *Couchbase) Cleanup() {
    if cb.httpClient == nil {
        return
    }
    cb.httpClient.CloseIdleConnections()
}