/
capturingStatsReporter.go
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/
capturingStatsReporter.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package metrics
import (
"io"
"time"
"github.com/uber-go/tally"
)
// NewMetricsScope returns a new metric scope
func NewMetricsScope(isReplay *bool) (tally.Scope, io.Closer, *CapturingStatsReporter) {
reporter := &CapturingStatsReporter{}
opts := tally.ScopeOptions{Reporter: reporter}
scope, closer := tally.NewRootScope(opts, time.Second)
return WrapScope(isReplay, scope, &realClock{}), closer, reporter
}
// NewTaggedMetricsScope return NewTaggedMetricsScope
func NewTaggedMetricsScope() (*TaggedScope, io.Closer, *CapturingStatsReporter) {
isReplay := false
scope, closer, reporter := NewMetricsScope(&isReplay)
return &TaggedScope{Scope: scope}, closer, reporter
}
type realClock struct {
}
func (c *realClock) Now() time.Time {
return time.Now()
}
// CapturingStatsReporter is a reporter used by tests to capture the metric so we can verify our tests.
type CapturingStatsReporter struct {
counts []CapturedCount
gauges []CapturedGauge
timers []CapturedTimer
histogramValueSamples []CapturedHistogramValueSamples
histogramDurationSamples []CapturedHistogramDurationSamples
capabilities int
flush int
}
// HistogramDurationSamples return HistogramDurationSamples
func (c *CapturingStatsReporter) HistogramDurationSamples() []CapturedHistogramDurationSamples {
return c.histogramDurationSamples
}
// HistogramValueSamples return HistogramValueSamples
func (c *CapturingStatsReporter) HistogramValueSamples() []CapturedHistogramValueSamples {
return c.histogramValueSamples
}
// Timers return Timers
func (c *CapturingStatsReporter) Timers() []CapturedTimer {
return c.timers
}
// Gauges return Gauges
func (c *CapturingStatsReporter) Gauges() []CapturedGauge {
return c.gauges
}
// Counts return Counts
func (c *CapturingStatsReporter) Counts() []CapturedCount {
return c.counts
}
// CapturedCount has associated name, tags and value
type CapturedCount struct {
name string
tags map[string]string
value int64
}
// Value return the value of CapturedCount
func (c *CapturedCount) Value() int64 {
return c.value
}
// Tags return CapturedCount tags
func (c *CapturedCount) Tags() map[string]string {
return c.tags
}
// Name return the name of CapturedCount
func (c *CapturedCount) Name() string {
return c.name
}
// CapturedGauge has CapturedGauge name, tag and values
type CapturedGauge struct {
name string
tags map[string]string
value float64
}
// Value return the value of CapturedGauge
func (c *CapturedGauge) Value() float64 {
return c.value
}
// Tags return the tags of CapturedGauge
func (c *CapturedGauge) Tags() map[string]string {
return c.tags
}
// Name return the name of CapturedGauge
func (c *CapturedGauge) Name() string {
return c.name
}
// CapturedTimer has related name , tags and value
type CapturedTimer struct {
name string
tags map[string]string
value time.Duration
}
// Value return the value of CapturedTimer
func (c *CapturedTimer) Value() time.Duration {
return c.value
}
// Tags return the tag of CapturedTimer
func (c *CapturedTimer) Tags() map[string]string {
return c.tags
}
// Name return the name of CapturedTimer
func (c *CapturedTimer) Name() string {
return c.name
}
// CapturedHistogramValueSamples has related information for CapturedHistogramValueSamples
type CapturedHistogramValueSamples struct {
name string
tags map[string]string
bucketLowerBound float64
bucketUpperBound float64
samples int64
}
// CapturedHistogramDurationSamples has related information for CapturedHistogramDurationSamples
type CapturedHistogramDurationSamples struct {
name string
tags map[string]string
bucketLowerBound time.Duration
bucketUpperBound time.Duration
samples int64
}
// ReportCounter reports the counts
func (c *CapturingStatsReporter) ReportCounter(
name string,
tags map[string]string,
value int64,
) {
c.counts = append(c.counts, CapturedCount{name, tags, value})
}
// ReportGauge reports the gauges
func (c *CapturingStatsReporter) ReportGauge(
name string,
tags map[string]string,
value float64,
) {
c.gauges = append(c.gauges, CapturedGauge{name, tags, value})
}
// ReportTimer reports timers
func (c *CapturingStatsReporter) ReportTimer(
name string,
tags map[string]string,
value time.Duration,
) {
c.timers = append(c.timers, CapturedTimer{name, tags, value})
}
// ReportHistogramValueSamples reports histogramValueSamples
func (c *CapturingStatsReporter) ReportHistogramValueSamples(
name string,
tags map[string]string,
buckets tally.Buckets,
bucketLowerBound,
bucketUpperBound float64,
samples int64,
) {
elem := CapturedHistogramValueSamples{name, tags,
bucketLowerBound, bucketUpperBound, samples}
c.histogramValueSamples = append(c.histogramValueSamples, elem)
}
// ReportHistogramDurationSamples reports ReportHistogramDurationSamples
func (c *CapturingStatsReporter) ReportHistogramDurationSamples(
name string,
tags map[string]string,
buckets tally.Buckets,
bucketLowerBound,
bucketUpperBound time.Duration,
samples int64,
) {
elem := CapturedHistogramDurationSamples{name, tags,
bucketLowerBound, bucketUpperBound, samples}
c.histogramDurationSamples = append(c.histogramDurationSamples, elem)
}
// Capabilities return tally.Capabilities
func (c *CapturingStatsReporter) Capabilities() tally.Capabilities {
c.capabilities++
return c
}
// Reporting will always return true
func (c *CapturingStatsReporter) Reporting() bool {
return true
}
// Tagging will always return true
func (c *CapturingStatsReporter) Tagging() bool {
return true
}
// Flush will add one to flush
func (c *CapturingStatsReporter) Flush() {
c.flush++
}