open-consul/vendor/github.com/circonus-labs/circonus-gometrics/histogram.go

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// Copyright 2016 Circonus, Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package circonusgometrics
import (
"sync"
"github.com/circonus-labs/circonusllhist"
)
// Histogram measures the distribution of a stream of values.
type Histogram struct {
name string
hist *circonusllhist.Histogram
rw sync.RWMutex
}
// Timing adds a value to a histogram
func (m *CirconusMetrics) Timing(metric string, val float64) {
m.SetHistogramValue(metric, val)
}
// RecordValue adds a value to a histogram
func (m *CirconusMetrics) RecordValue(metric string, val float64) {
m.SetHistogramValue(metric, val)
}
// SetHistogramValue adds a value to a histogram
func (m *CirconusMetrics) SetHistogramValue(metric string, val float64) {
hist := m.NewHistogram(metric)
m.hm.Lock()
hist.rw.Lock()
hist.hist.RecordValue(val)
hist.rw.Unlock()
m.hm.Unlock()
}
// RemoveHistogram removes a histogram
func (m *CirconusMetrics) RemoveHistogram(metric string) {
m.hm.Lock()
delete(m.histograms, metric)
m.hm.Unlock()
}
// NewHistogram returns a histogram instance.
func (m *CirconusMetrics) NewHistogram(metric string) *Histogram {
m.hm.Lock()
defer m.hm.Unlock()
if hist, ok := m.histograms[metric]; ok {
return hist
}
hist := &Histogram{
name: metric,
hist: circonusllhist.New(),
}
m.histograms[metric] = hist
return hist
}
// Name returns the name from a histogram instance
func (h *Histogram) Name() string {
return h.name
}
// RecordValue records the given value to a histogram instance
func (h *Histogram) RecordValue(v float64) {
h.rw.Lock()
h.hist.RecordValue(v)
h.rw.Unlock()
}