metrics

Documentation

Index

• func Init(cfg *config.Server) error
• type Counter
  • func NewCounter(name, description string, opts ...MetricOption) *Counter
  • func (f *Counter) Add(value float64)
  • func (f *Counter) Decrement()
  • func (f *Counter) Increment()
  • func (f *Counter) With(labelValues ...LabelValue) *Counter
• type Gauge
  • func NewGauge(name, description string, opts ...MetricOption) *Gauge
  • func (f *Gauge) Record(value float64)
  • func (f *Gauge) With(labelValues ...LabelValue) *Gauge
• type GaugeValues
• type Histogram
  • func NewHistogram(name, description string, bounds []float64, opts ...MetricOption) *Histogram
  • func (f *Histogram) Record(value float64)
  • func (f *Histogram) With(labelValues ...LabelValue) *Histogram
• type Label
  • func NewLabel(key string) Label
  • func (l Label) Value(value string) LabelValue
• type LabelValue
  • func (l LabelValue) Key() Label
  • func (l LabelValue) Value() string
• type Metadata
• type MetricOption
  • func WithUnit(unit Unit) MetricOption
• type MetricOptions
• type MetricType
• type Unit

Functions

func Init

func Init(cfg *config.Server) error

Init initializes and registers the global metrics server.

Types

type Counter

type Counter struct {
	// contains filtered or unexported fields
}

func NewCounter

func NewCounter(name, description string, opts ...MetricOption) *Counter

NewCounter creates a new Counter Metric (the values will be cumulative). That means that data collected by the new Metric will be summed before export.

func (*Counter) Add

func (f *Counter) Add(value float64)

func (*Counter) Decrement

func (f *Counter) Decrement()

func (*Counter) Increment

func (f *Counter) Increment()

func (*Counter) With

func (f *Counter) With(labelValues ...LabelValue) *Counter

type Gauge

type Gauge struct {
	// contains filtered or unexported fields
}

func NewGauge

func NewGauge(name, description string, opts ...MetricOption) *Gauge

NewGauge creates a new Gauge Metric. That means that data collected by the new Metric will export only the last recorded value.

func (*Gauge) Record

func (f *Gauge) Record(value float64)

func (*Gauge) With

func (f *Gauge) With(labelValues ...LabelValue) *Gauge

type GaugeValues

type GaugeValues struct {
	// contains filtered or unexported fields
}

type Histogram

type Histogram struct {
	// contains filtered or unexported fields
}

func NewHistogram

func NewHistogram(name, description string, bounds []float64, opts ...MetricOption) *Histogram

NewHistogram creates a new Metric with an aggregation type of Histogram. This means that the data collected by the Metric will be collected and exported as a histogram, with the specified bounds.

func (*Histogram) Record

func (f *Histogram) Record(value float64)

func (*Histogram) With

func (f *Histogram) With(labelValues ...LabelValue) *Histogram

type Label

type Label struct {
	// contains filtered or unexported fields
}

A Label provides a named dimension for a Metric.

func NewLabel

func NewLabel(key string) Label

NewLabel will attempt to create a new Label.

func (Label) Value

func (l Label) Value(value string) LabelValue

Value creates a new LabelValue for the Label.

type LabelValue

type LabelValue struct {
	// contains filtered or unexported fields
}

A LabelValue represents a Label with a specific value. It is used to record values for a Metric.

func (LabelValue) Key

func (l LabelValue) Key() Label

func (LabelValue) Value

func (l LabelValue) Value() string

type Metadata

type Metadata struct {
	Name        string
	Type        MetricType
	Description string
	Bounds      []float64
}

Metadata records a metric's metadata.

type MetricOption

type MetricOption func(*MetricOptions)

Options encode changes to the options passed to a Metric at creation time.

func WithUnit

func WithUnit(unit Unit) MetricOption

WithUnit provides configuration options for a new Metric, providing unit of measure information for a new Metric.

type MetricOptions

type MetricOptions struct {
	Unit        Unit
	Name        string
	Description string
}

type MetricType

type MetricType string

MetricType is the type of a metric.

const (
	CounterType   MetricType = "Counter"
	GaugeType     MetricType = "Gauge"
	HistogramType MetricType = "Histogram"
)

type Unit

type Unit string

Unit encodes the standard name for describing the quantity measured by a Metric (if applicable).

const (
	None         Unit = "1"
	Bytes        Unit = "By"
	Seconds      Unit = "s"
	Milliseconds Unit = "ms"
)

Predefined units for use with the metrics package.