expvar

Documentation

Overview

Package expvar provides expvar backends for metrics. Label values are not supported.

Index

• type Counter
  • func NewCounter(name string) *Counter
  • func (c *Counter) Add(delta float64)
  • func (c *Counter) With(labelValues ...string) metrics.Counter
• type Gauge
  • func NewGauge(name string) *Gauge
  • func (g *Gauge) Add(delta float64)
  • func (g *Gauge) Set(value float64)
  • func (g *Gauge) With(labelValues ...string) metrics.Gauge
• type Histogram
  • func NewHistogram(name string, buckets int) *Histogram
  • func (h *Histogram) Observe(value float64)
  • func (h *Histogram) With(labelValues ...string) metrics.Histogram

Types

type Counter

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

Counter implements the counter metric with an expvar float. Label values are not supported.

func NewCounter

func NewCounter(name string) *Counter

NewCounter creates an expvar Float with the given name, and returns an object that implements the Counter interface.

func (*Counter) Add

func (c *Counter) Add(delta float64)

Add implements Counter.

func (*Counter) With

func (c *Counter) With(labelValues ...string) metrics.Counter

With is a no-op.

type Gauge

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

Gauge implements the gauge metric with an expvar float. Label values are not supported.

func NewGauge

func NewGauge(name string) *Gauge

NewGauge creates an expvar Float with the given name, and returns an object that implements the Gauge interface.

func (*Gauge) Add

func (g *Gauge) Add(delta float64)

Add implements metrics.Gauge.

func (*Gauge) Set

func (g *Gauge) Set(value float64)

Set implements Gauge.

func (*Gauge) With

func (g *Gauge) With(labelValues ...string) metrics.Gauge

With is a no-op.

type Histogram

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

Histogram implements the histogram metric with a combination of the generic Histogram object and several expvar Floats, one for each of the 50th, 90th, 95th, and 99th quantiles of observed values, with the quantile attached to the name as a suffix. Label values are not supported.

func NewHistogram

func NewHistogram(name string, buckets int) *Histogram

NewHistogram returns a Histogram object with the given name and number of buckets in the underlying histogram object. 50 is a good default number of buckets.

func (*Histogram) Observe

func (h *Histogram) Observe(value float64)

Observe implements Histogram.

func (*Histogram) With

func (h *Histogram) With(labelValues ...string) metrics.Histogram

With is a no-op.