firehol/netdata

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

package rabbitmq

import (
    _ "embed"
    "errors"
    "net/http"
    "time"

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

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

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

func New() *RabbitMQ {
    return &RabbitMQ{
        Config: Config{
            HTTPConfig: web.HTTPConfig{
                RequestConfig: web.RequestConfig{
                    URL:      "http://localhost:15672",
                    Username: "guest",
                    Password: "guest",
                },
                ClientConfig: web.ClientConfig{
                    Timeout: confopt.Duration(time.Second),
                },
            },
            CollectQueues: false,
        },
        charts: baseCharts.Copy(),
        vhosts: make(map[string]bool),
        queues: make(map[string]queueCache),
    }
}

type Config struct {
    UpdateEvery    int `yaml:"update_every,omitempty" json:"update_every"`
    web.HTTPConfig `yaml:",inline" json:""`
    CollectQueues  bool `yaml:"collect_queues_metrics" json:"collect_queues_metrics"`
}

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

        charts *module.Charts

        httpClient *http.Client

        nodeName string
        vhosts   map[string]bool
        queues   map[string]queueCache
    }
    queueCache struct {
        name, vhost string
    }
)

func (r *RabbitMQ) Configuration() any {
    return r.Config
}

func (r *RabbitMQ) Init() error {
    if r.URL == "" {
        r.Error("'url' can not be empty")
        return errors.New("url not set")
    }

    client, err := web.NewHTTPClient(r.ClientConfig)
    if err != nil {
        r.Errorf("init HTTP client: %v", err)
        return err
    }
    r.httpClient = client

    r.Debugf("using URL %s", r.URL)
    r.Debugf("using timeout: %s", r.Timeout)

    return nil
}

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

func (r *RabbitMQ) Charts() *module.Charts {
    return r.charts
}

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

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

    return mx
}

func (r *RabbitMQ) Cleanup() {
    if r.httpClient != nil {
        r.httpClient.CloseIdleConnections()
    }
}