model

type CollectorSettings struct {

	// Subsystems defines subsystem with user-defined metrics.
	Subsystems Subsystems `yaml:"subsystems"`
}

type CollectorsSettings map[string]CollectorSettings

type Metrics []UserMetric

type MetricsSubsystem struct {
	// TODO: this should be an interface because use cases are not limited by queries only,
	//   there could by system commands, HTTP requests, etc...
	// Databases defines which databases should be visited for collecting metrics.
	Databases   string `yaml:"databases"`
	DatabasesRE *regexp.Regexp
	// Query defines a SQL statement used for getting label/values for metrics.
	Query string `yaml:"query"`
	// Metrics defines a list of labels and metrics should be extracted from Query result.
	Metrics Metrics `yaml:"metrics"`
}

type PGResult struct {
	Nrows    int
	Ncols    int
	Colnames []pgproto3.FieldDescription
	Rows     [][]sql.NullString
}

type Subsystems map[string]MetricsSubsystem

type UserMetric struct {
	ShortName     string              `yaml:"name"`
	Usage         string              `yaml:"usage"`
	Labels        []string            `yaml:"labels,omitempty"`
	Value         string              `yaml:"value"`
	LabeledValues map[string][]string `yaml:"labeled_values,omitempty"`
	Description   string              `yaml:"description"`
}