adds basic traces using open traces
This commit is contained in:
bergquist
+21
@@ -0,0 +1,21 @@
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The MIT License (MIT)
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Copyright (c) 2016 Uber Technologies, Inc.
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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
|
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THE SOFTWARE.
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+34
@@ -0,0 +1,34 @@
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// Copyright (c) 2017 Uber Technologies, Inc.
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//
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// 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
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// THE SOFTWARE.
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package metrics
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// Counter tracks the number of times an event has occurred
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type Counter interface {
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// Inc adds the given value to the counter.
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Inc(int64)
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}
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// NullCounter counter that does nothing
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var NullCounter Counter = nullCounter{}
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type nullCounter struct{}
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func (nullCounter) Inc(int64) {}
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+41
@@ -0,0 +1,41 @@
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// Copyright (c) 2017 Uber Technologies, Inc.
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//
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// 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:
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//
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// 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
|
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package metrics
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// Factory creates new metrics
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type Factory interface {
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Counter(name string, tags map[string]string) Counter
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Timer(name string, tags map[string]string) Timer
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Gauge(name string, tags map[string]string) Gauge
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// Namespace returns a nested metrics factory.
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Namespace(name string, tags map[string]string) Factory
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}
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// NullFactory is a metrics factory that returns NullCounter, NullTimer, and NullGauge.
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var NullFactory Factory = nullFactory{}
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type nullFactory struct{}
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func (nullFactory) Counter(name string, tags map[string]string) Counter { return NullCounter }
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func (nullFactory) Timer(name string, tags map[string]string) Timer { return NullTimer }
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func (nullFactory) Gauge(name string, tags map[string]string) Gauge { return NullGauge }
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func (nullFactory) Namespace(name string, tags map[string]string) Factory { return NullFactory }
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+34
@@ -0,0 +1,34 @@
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// Copyright (c) 2017 Uber Technologies, Inc.
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//
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// 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:
|
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//
|
||||
// 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
|
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// THE SOFTWARE.
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package metrics
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// Gauge returns instantaneous measurements of something as an int64 value
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type Gauge interface {
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// Update the gauge to the value passed in.
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Update(int64)
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}
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// NullGauge gauge that does nothing
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var NullGauge Gauge = nullGauge{}
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type nullGauge struct{}
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func (nullGauge) Update(int64) {}
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+338
@@ -0,0 +1,338 @@
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// Copyright (c) 2017 Uber Technologies, Inc.
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//
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// 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:
|
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//
|
||||
// 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
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// THE SOFTWARE.
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package metrics
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import (
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"sort"
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"sync"
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"sync/atomic"
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"time"
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"github.com/codahale/hdrhistogram"
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)
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// This is intentionally very similar to github.com/codahale/metrics, the
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// main difference being that counters/gauges are scoped to the provider
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// rather than being global (to facilitate testing).
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// A LocalBackend is a metrics provider which aggregates data in-vm, and
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// allows exporting snapshots to shove the data into a remote collector
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type LocalBackend struct {
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cm sync.Mutex
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gm sync.Mutex
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tm sync.Mutex
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counters map[string]*int64
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gauges map[string]*int64
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timers map[string]*localBackendTimer
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stop chan struct{}
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wg sync.WaitGroup
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TagsSep string
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TagKVSep string
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}
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// NewLocalBackend returns a new LocalBackend. The collectionInterval is the histogram
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// time window for each timer.
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func NewLocalBackend(collectionInterval time.Duration) *LocalBackend {
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b := &LocalBackend{
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counters: make(map[string]*int64),
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gauges: make(map[string]*int64),
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timers: make(map[string]*localBackendTimer),
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stop: make(chan struct{}),
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TagsSep: "|",
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TagKVSep: "=",
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}
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if collectionInterval == 0 {
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// Use one histogram time window for all timers
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return b
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}
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b.wg.Add(1)
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go b.runLoop(collectionInterval)
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return b
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}
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// Clear discards accumulated stats
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func (b *LocalBackend) Clear() {
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b.cm.Lock()
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defer b.cm.Unlock()
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b.gm.Lock()
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defer b.gm.Unlock()
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b.tm.Lock()
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defer b.tm.Unlock()
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b.counters = make(map[string]*int64)
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b.gauges = make(map[string]*int64)
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b.timers = make(map[string]*localBackendTimer)
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}
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func (b *LocalBackend) runLoop(collectionInterval time.Duration) {
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defer b.wg.Done()
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ticker := time.NewTicker(collectionInterval)
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for {
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select {
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case <-ticker.C:
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b.tm.Lock()
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timers := make(map[string]*localBackendTimer, len(b.timers))
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for timerName, timer := range b.timers {
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timers[timerName] = timer
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}
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b.tm.Unlock()
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for _, t := range timers {
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t.Lock()
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t.hist.Rotate()
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t.Unlock()
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}
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case <-b.stop:
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ticker.Stop()
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return
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}
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}
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}
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// IncCounter increments a counter value
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func (b *LocalBackend) IncCounter(name string, tags map[string]string, delta int64) {
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name = GetKey(name, tags, b.TagsSep, b.TagKVSep)
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b.cm.Lock()
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defer b.cm.Unlock()
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counter := b.counters[name]
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if counter == nil {
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b.counters[name] = new(int64)
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*b.counters[name] = delta
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return
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}
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atomic.AddInt64(counter, delta)
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}
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// UpdateGauge updates the value of a gauge
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func (b *LocalBackend) UpdateGauge(name string, tags map[string]string, value int64) {
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name = GetKey(name, tags, b.TagsSep, b.TagKVSep)
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b.gm.Lock()
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defer b.gm.Unlock()
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gauge := b.gauges[name]
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if gauge == nil {
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b.gauges[name] = new(int64)
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*b.gauges[name] = value
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return
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}
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atomic.StoreInt64(gauge, value)
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}
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// RecordTimer records a timing duration
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func (b *LocalBackend) RecordTimer(name string, tags map[string]string, d time.Duration) {
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name = GetKey(name, tags, b.TagsSep, b.TagKVSep)
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timer := b.findOrCreateTimer(name)
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timer.Lock()
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timer.hist.Current.RecordValue(int64(d / time.Millisecond))
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timer.Unlock()
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}
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func (b *LocalBackend) findOrCreateTimer(name string) *localBackendTimer {
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b.tm.Lock()
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defer b.tm.Unlock()
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if t, ok := b.timers[name]; ok {
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return t
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}
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t := &localBackendTimer{
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hist: hdrhistogram.NewWindowed(5, 0, int64((5*time.Minute)/time.Millisecond), 1),
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}
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b.timers[name] = t
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return t
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}
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type localBackendTimer struct {
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sync.Mutex
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hist *hdrhistogram.WindowedHistogram
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}
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var (
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percentiles = map[string]float64{
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"P50": 50,
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"P75": 75,
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"P90": 90,
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"P95": 95,
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"P99": 99,
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"P999": 99.9,
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}
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)
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// Snapshot captures a snapshot of the current counter and gauge values
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func (b *LocalBackend) Snapshot() (counters, gauges map[string]int64) {
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b.cm.Lock()
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defer b.cm.Unlock()
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counters = make(map[string]int64, len(b.counters))
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for name, value := range b.counters {
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counters[name] = atomic.LoadInt64(value)
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}
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b.gm.Lock()
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defer b.gm.Unlock()
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gauges = make(map[string]int64, len(b.gauges))
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for name, value := range b.gauges {
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gauges[name] = atomic.LoadInt64(value)
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}
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b.tm.Lock()
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timers := make(map[string]*localBackendTimer)
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for timerName, timer := range b.timers {
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timers[timerName] = timer
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}
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b.tm.Unlock()
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for timerName, timer := range timers {
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timer.Lock()
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hist := timer.hist.Merge()
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timer.Unlock()
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for name, q := range percentiles {
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gauges[timerName+"."+name] = hist.ValueAtQuantile(q)
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}
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}
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return
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}
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// Stop cleanly closes the background goroutine spawned by NewLocalBackend.
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func (b *LocalBackend) Stop() {
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close(b.stop)
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b.wg.Wait()
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}
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// GetKey converts name+tags into a single string of the form
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// "name|tag1=value1|...|tagN=valueN", where tag names are
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// sorted alphabetically.
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func GetKey(name string, tags map[string]string, tagsSep string, tagKVSep string) string {
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keys := make([]string, 0, len(tags))
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for k := range tags {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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key := name
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for _, k := range keys {
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key = key + tagsSep + k + tagKVSep + tags[k]
|
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}
|
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return key
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}
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type stats struct {
|
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name string
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tags map[string]string
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localBackend *LocalBackend
|
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}
|
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|
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type localTimer struct {
|
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stats
|
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}
|
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|
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func (l *localTimer) Record(d time.Duration) {
|
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l.localBackend.RecordTimer(l.name, l.tags, d)
|
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}
|
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|
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type localCounter struct {
|
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stats
|
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}
|
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|
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func (l *localCounter) Inc(delta int64) {
|
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l.localBackend.IncCounter(l.name, l.tags, delta)
|
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}
|
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|
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type localGauge struct {
|
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stats
|
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}
|
||||
|
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func (l *localGauge) Update(value int64) {
|
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l.localBackend.UpdateGauge(l.name, l.tags, value)
|
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}
|
||||
|
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// LocalFactory stats factory that creates metrics that are stored locally
|
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type LocalFactory struct {
|
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*LocalBackend
|
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namespace string
|
||||
tags map[string]string
|
||||
}
|
||||
|
||||
// NewLocalFactory returns a new LocalMetricsFactory
|
||||
func NewLocalFactory(collectionInterval time.Duration) *LocalFactory {
|
||||
return &LocalFactory{
|
||||
LocalBackend: NewLocalBackend(collectionInterval),
|
||||
}
|
||||
}
|
||||
|
||||
// appendTags adds the tags to the namespace tags and returns a combined map.
|
||||
func (l *LocalFactory) appendTags(tags map[string]string) map[string]string {
|
||||
newTags := make(map[string]string)
|
||||
for k, v := range l.tags {
|
||||
newTags[k] = v
|
||||
}
|
||||
for k, v := range tags {
|
||||
newTags[k] = v
|
||||
}
|
||||
return newTags
|
||||
}
|
||||
|
||||
func (l *LocalFactory) newNamespace(name string) string {
|
||||
if l.namespace == "" {
|
||||
return name
|
||||
}
|
||||
return l.namespace + "." + name
|
||||
}
|
||||
|
||||
// Counter returns a local stats counter
|
||||
func (l *LocalFactory) Counter(name string, tags map[string]string) Counter {
|
||||
return &localCounter{
|
||||
stats{
|
||||
name: l.newNamespace(name),
|
||||
tags: l.appendTags(tags),
|
||||
localBackend: l.LocalBackend,
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
// Timer returns a local stats timer.
|
||||
func (l *LocalFactory) Timer(name string, tags map[string]string) Timer {
|
||||
return &localTimer{
|
||||
stats{
|
||||
name: l.newNamespace(name),
|
||||
tags: l.appendTags(tags),
|
||||
localBackend: l.LocalBackend,
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
// Gauge returns a local stats gauge.
|
||||
func (l *LocalFactory) Gauge(name string, tags map[string]string) Gauge {
|
||||
return &localGauge{
|
||||
stats{
|
||||
name: l.newNamespace(name),
|
||||
tags: l.appendTags(tags),
|
||||
localBackend: l.LocalBackend,
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
// Namespace returns a new namespace.
|
||||
func (l *LocalFactory) Namespace(name string, tags map[string]string) Factory {
|
||||
return &LocalFactory{
|
||||
namespace: l.newNamespace(name),
|
||||
tags: l.appendTags(tags),
|
||||
LocalBackend: l.LocalBackend,
|
||||
}
|
||||
}
|
||||
+91
@@ -0,0 +1,91 @@
|
||||
// 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 (
|
||||
"fmt"
|
||||
"reflect"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// Init initializes the passed in metrics and initializes its fields using the passed in factory.
|
||||
func Init(metrics interface{}, factory Factory, globalTags map[string]string) {
|
||||
if err := initMetrics(metrics, factory, globalTags); err != nil {
|
||||
panic(err.Error())
|
||||
}
|
||||
}
|
||||
|
||||
// initMetrics uses reflection to initialize a struct containing metrics fields
|
||||
// by assigning new Counter/Gauge/Timer values with the metric name retrieved
|
||||
// from the `metric` tag and stats tags retrieved from the `tags` tag.
|
||||
//
|
||||
// Note: all fields of the struct must be exported, have a `metric` tag, and be
|
||||
// of type Counter or Gauge or Timer.
|
||||
func initMetrics(m interface{}, factory Factory, globalTags map[string]string) error {
|
||||
// Allow user to opt out of reporting metrics by passing in nil.
|
||||
if factory == nil {
|
||||
factory = NullFactory
|
||||
}
|
||||
|
||||
counterPtrType := reflect.TypeOf((*Counter)(nil)).Elem()
|
||||
gaugePtrType := reflect.TypeOf((*Gauge)(nil)).Elem()
|
||||
timerPtrType := reflect.TypeOf((*Timer)(nil)).Elem()
|
||||
|
||||
v := reflect.ValueOf(m).Elem()
|
||||
t := v.Type()
|
||||
for i := 0; i < t.NumField(); i++ {
|
||||
tags := make(map[string]string)
|
||||
for k, v := range globalTags {
|
||||
tags[k] = v
|
||||
}
|
||||
field := t.Field(i)
|
||||
metric := field.Tag.Get("metric")
|
||||
if metric == "" {
|
||||
return fmt.Errorf("Field %s is missing a tag 'metric'", field.Name)
|
||||
}
|
||||
if tagString := field.Tag.Get("tags"); tagString != "" {
|
||||
tagPairs := strings.Split(tagString, ",")
|
||||
for _, tagPair := range tagPairs {
|
||||
tag := strings.Split(tagPair, "=")
|
||||
if len(tag) != 2 {
|
||||
return fmt.Errorf(
|
||||
"Field [%s]: Tag [%s] is not of the form key=value in 'tags' string [%s]",
|
||||
field.Name, tagPair, tagString)
|
||||
}
|
||||
tags[tag[0]] = tag[1]
|
||||
}
|
||||
}
|
||||
var obj interface{}
|
||||
if field.Type.AssignableTo(counterPtrType) {
|
||||
obj = factory.Counter(metric, tags)
|
||||
} else if field.Type.AssignableTo(gaugePtrType) {
|
||||
obj = factory.Gauge(metric, tags)
|
||||
} else if field.Type.AssignableTo(timerPtrType) {
|
||||
obj = factory.Timer(metric, tags)
|
||||
} else {
|
||||
return fmt.Errorf(
|
||||
"Field %s is not a pointer to timer, gauge, or counter",
|
||||
field.Name)
|
||||
}
|
||||
v.Field(i).Set(reflect.ValueOf(obj))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
+49
@@ -0,0 +1,49 @@
|
||||
// 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 (
|
||||
"time"
|
||||
)
|
||||
|
||||
// StartStopwatch begins recording the executing time of an event, returning
|
||||
// a Stopwatch that should be used to stop the recording the time for
|
||||
// that event. Multiple events can be occurring simultaneously each
|
||||
// represented by different active Stopwatches
|
||||
func StartStopwatch(timer Timer) Stopwatch {
|
||||
return Stopwatch{t: timer, start: time.Now()}
|
||||
}
|
||||
|
||||
// A Stopwatch tracks the execution time of a specific event
|
||||
type Stopwatch struct {
|
||||
t Timer
|
||||
start time.Time
|
||||
}
|
||||
|
||||
// Stop stops executing of the stopwatch and records the amount of elapsed time
|
||||
func (s Stopwatch) Stop() {
|
||||
s.t.Record(s.ElapsedTime())
|
||||
}
|
||||
|
||||
// ElapsedTime returns the amount of elapsed time (in time.Duration)
|
||||
func (s Stopwatch) ElapsedTime() time.Duration {
|
||||
return time.Since(s.start)
|
||||
}
|
||||
+39
@@ -0,0 +1,39 @@
|
||||
// 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 (
|
||||
"time"
|
||||
)
|
||||
|
||||
// Timer accumulates observations about how long some operation took,
|
||||
// and also maintains a historgam of percentiles.
|
||||
type Timer interface {
|
||||
// Records the time passed in.
|
||||
Record(time.Duration)
|
||||
}
|
||||
|
||||
// NullTimer timer that does nothing
|
||||
var NullTimer Timer = nullTimer{}
|
||||
|
||||
type nullTimer struct{}
|
||||
|
||||
func (nullTimer) Record(time.Duration) {}
|
||||
Reference in New Issue
Block a user