diff options
Diffstat (limited to 'vendor/github.com/uber/jaeger-lib/metrics')
| -rw-r--r-- | vendor/github.com/uber/jaeger-lib/metrics/counter.go | 28 | ||||
| -rw-r--r-- | vendor/github.com/uber/jaeger-lib/metrics/factory.go | 35 | ||||
| -rw-r--r-- | vendor/github.com/uber/jaeger-lib/metrics/gauge.go | 28 | ||||
| -rw-r--r-- | vendor/github.com/uber/jaeger-lib/metrics/local.go | 337 | ||||
| -rw-r--r-- | vendor/github.com/uber/jaeger-lib/metrics/metrics.go | 85 | ||||
| -rw-r--r-- | vendor/github.com/uber/jaeger-lib/metrics/stopwatch.go | 43 | ||||
| -rw-r--r-- | vendor/github.com/uber/jaeger-lib/metrics/timer.go | 33 |
7 files changed, 589 insertions, 0 deletions
diff --git a/vendor/github.com/uber/jaeger-lib/metrics/counter.go b/vendor/github.com/uber/jaeger-lib/metrics/counter.go new file mode 100644 index 000000000..2a6a43efd --- /dev/null +++ b/vendor/github.com/uber/jaeger-lib/metrics/counter.go @@ -0,0 +1,28 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package metrics + +// Counter tracks the number of times an event has occurred +type Counter interface { + // Inc adds the given value to the counter. + Inc(int64) +} + +// NullCounter counter that does nothing +var NullCounter Counter = nullCounter{} + +type nullCounter struct{} + +func (nullCounter) Inc(int64) {} diff --git a/vendor/github.com/uber/jaeger-lib/metrics/factory.go b/vendor/github.com/uber/jaeger-lib/metrics/factory.go new file mode 100644 index 000000000..a744a890d --- /dev/null +++ b/vendor/github.com/uber/jaeger-lib/metrics/factory.go @@ -0,0 +1,35 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package metrics + +// Factory creates new metrics +type Factory interface { + Counter(name string, tags map[string]string) Counter + Timer(name string, tags map[string]string) Timer + Gauge(name string, tags map[string]string) Gauge + + // Namespace returns a nested metrics factory. + Namespace(name string, tags map[string]string) Factory +} + +// NullFactory is a metrics factory that returns NullCounter, NullTimer, and NullGauge. +var NullFactory Factory = nullFactory{} + +type nullFactory struct{} + +func (nullFactory) Counter(name string, tags map[string]string) Counter { return NullCounter } +func (nullFactory) Timer(name string, tags map[string]string) Timer { return NullTimer } +func (nullFactory) Gauge(name string, tags map[string]string) Gauge { return NullGauge } +func (nullFactory) Namespace(name string, tags map[string]string) Factory { return NullFactory } diff --git a/vendor/github.com/uber/jaeger-lib/metrics/gauge.go b/vendor/github.com/uber/jaeger-lib/metrics/gauge.go new file mode 100644 index 000000000..3c606391a --- /dev/null +++ b/vendor/github.com/uber/jaeger-lib/metrics/gauge.go @@ -0,0 +1,28 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package metrics + +// Gauge returns instantaneous measurements of something as an int64 value +type Gauge interface { + // Update the gauge to the value passed in. + Update(int64) +} + +// NullGauge gauge that does nothing +var NullGauge Gauge = nullGauge{} + +type nullGauge struct{} + +func (nullGauge) Update(int64) {} diff --git a/vendor/github.com/uber/jaeger-lib/metrics/local.go b/vendor/github.com/uber/jaeger-lib/metrics/local.go new file mode 100644 index 000000000..217d30600 --- /dev/null +++ b/vendor/github.com/uber/jaeger-lib/metrics/local.go @@ -0,0 +1,337 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package metrics + +import ( + "sort" + "sync" + "sync/atomic" + "time" + + "github.com/codahale/hdrhistogram" +) + +// This is intentionally very similar to github.com/codahale/metrics, the +// main difference being that counters/gauges are scoped to the provider +// rather than being global (to facilitate testing). + +// A LocalBackend is a metrics provider which aggregates data in-vm, and +// allows exporting snapshots to shove the data into a remote collector +type LocalBackend struct { + cm sync.Mutex + gm sync.Mutex + tm sync.Mutex + counters map[string]*int64 + gauges map[string]*int64 + timers map[string]*localBackendTimer + stop chan struct{} + wg sync.WaitGroup + TagsSep string + TagKVSep string +} + +// NewLocalBackend returns a new LocalBackend. The collectionInterval is the histogram +// time window for each timer. +func NewLocalBackend(collectionInterval time.Duration) *LocalBackend { + b := &LocalBackend{ + counters: make(map[string]*int64), + gauges: make(map[string]*int64), + timers: make(map[string]*localBackendTimer), + stop: make(chan struct{}), + TagsSep: "|", + TagKVSep: "=", + } + if collectionInterval == 0 { + // Use one histogram time window for all timers + return b + } + b.wg.Add(1) + go b.runLoop(collectionInterval) + return b +} + +// Clear discards accumulated stats +func (b *LocalBackend) Clear() { + b.cm.Lock() + defer b.cm.Unlock() + b.gm.Lock() + defer b.gm.Unlock() + b.tm.Lock() + defer b.tm.Unlock() + b.counters = make(map[string]*int64) + b.gauges = make(map[string]*int64) + b.timers = make(map[string]*localBackendTimer) +} + +func (b *LocalBackend) runLoop(collectionInterval time.Duration) { + defer b.wg.Done() + ticker := time.NewTicker(collectionInterval) + for { + select { + case <-ticker.C: + b.tm.Lock() + timers := make(map[string]*localBackendTimer, len(b.timers)) + for timerName, timer := range b.timers { + timers[timerName] = timer + } + b.tm.Unlock() + + for _, t := range timers { + t.Lock() + t.hist.Rotate() + t.Unlock() + } + case <-b.stop: + ticker.Stop() + return + } + } +} + +// IncCounter increments a counter value +func (b *LocalBackend) IncCounter(name string, tags map[string]string, delta int64) { + name = GetKey(name, tags, b.TagsSep, b.TagKVSep) + b.cm.Lock() + defer b.cm.Unlock() + counter := b.counters[name] + if counter == nil { + b.counters[name] = new(int64) + *b.counters[name] = delta + return + } + atomic.AddInt64(counter, delta) +} + +// UpdateGauge updates the value of a gauge +func (b *LocalBackend) UpdateGauge(name string, tags map[string]string, value int64) { + name = GetKey(name, tags, b.TagsSep, b.TagKVSep) + b.gm.Lock() + defer b.gm.Unlock() + gauge := b.gauges[name] + if gauge == nil { + b.gauges[name] = new(int64) + *b.gauges[name] = value + return + } + atomic.StoreInt64(gauge, value) +} + +// RecordTimer records a timing duration +func (b *LocalBackend) RecordTimer(name string, tags map[string]string, d time.Duration) { + name = GetKey(name, tags, b.TagsSep, b.TagKVSep) + timer := b.findOrCreateTimer(name) + timer.Lock() + timer.hist.Current.RecordValue(int64(d / time.Millisecond)) + timer.Unlock() +} + +func (b *LocalBackend) findOrCreateTimer(name string) *localBackendTimer { + b.tm.Lock() + defer b.tm.Unlock() + if t, ok := b.timers[name]; ok { + return t + } + + t := &localBackendTimer{ + hist: hdrhistogram.NewWindowed(5, 0, int64((5*time.Minute)/time.Millisecond), 1), + } + b.timers[name] = t + return t +} + +type localBackendTimer struct { + sync.Mutex + hist *hdrhistogram.WindowedHistogram +} + +var ( + percentiles = map[string]float64{ + "P50": 50, + "P75": 75, + "P90": 90, + "P95": 95, + "P99": 99, + "P999": 99.9, + } +) + +// Snapshot captures a snapshot of the current counter and gauge values +func (b *LocalBackend) Snapshot() (counters, gauges map[string]int64) { + b.cm.Lock() + defer b.cm.Unlock() + + counters = make(map[string]int64, len(b.counters)) + for name, value := range b.counters { + counters[name] = atomic.LoadInt64(value) + } + + b.gm.Lock() + defer b.gm.Unlock() + + gauges = make(map[string]int64, len(b.gauges)) + for name, value := range b.gauges { + gauges[name] = atomic.LoadInt64(value) + } + + b.tm.Lock() + timers := make(map[string]*localBackendTimer) + for timerName, timer := range b.timers { + timers[timerName] = timer + } + b.tm.Unlock() + + for timerName, timer := range timers { + timer.Lock() + hist := timer.hist.Merge() + timer.Unlock() + for name, q := range percentiles { + gauges[timerName+"."+name] = hist.ValueAtQuantile(q) + } + } + + return +} + +// Stop cleanly closes the background goroutine spawned by NewLocalBackend. +func (b *LocalBackend) Stop() { + close(b.stop) + b.wg.Wait() +} + +// GetKey converts name+tags into a single string of the form +// "name|tag1=value1|...|tagN=valueN", where tag names are +// sorted alphabetically. +func GetKey(name string, tags map[string]string, tagsSep string, tagKVSep string) string { + keys := make([]string, 0, len(tags)) + for k := range tags { + keys = append(keys, k) + } + sort.Strings(keys) + key := name + for _, k := range keys { + key = key + tagsSep + k + tagKVSep + tags[k] + } + return key +} + +type stats struct { + name string + tags map[string]string + localBackend *LocalBackend +} + +type localTimer struct { + stats +} + +func (l *localTimer) Record(d time.Duration) { + l.localBackend.RecordTimer(l.name, l.tags, d) +} + +type localCounter struct { + stats +} + +func (l *localCounter) Inc(delta int64) { + l.localBackend.IncCounter(l.name, l.tags, delta) +} + +type localGauge struct { + stats +} + +func (l *localGauge) Update(value int64) { + l.localBackend.UpdateGauge(l.name, l.tags, value) +} + +// LocalFactory stats factory that creates metrics that are stored locally +type LocalFactory struct { + *LocalBackend + 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 + } + + if name == "" { + return l.namespace + } + + 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, + } +} diff --git a/vendor/github.com/uber/jaeger-lib/metrics/metrics.go b/vendor/github.com/uber/jaeger-lib/metrics/metrics.go new file mode 100644 index 000000000..0b97707b0 --- /dev/null +++ b/vendor/github.com/uber/jaeger-lib/metrics/metrics.go @@ -0,0 +1,85 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +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 +} diff --git a/vendor/github.com/uber/jaeger-lib/metrics/stopwatch.go b/vendor/github.com/uber/jaeger-lib/metrics/stopwatch.go new file mode 100644 index 000000000..4a8abdb53 --- /dev/null +++ b/vendor/github.com/uber/jaeger-lib/metrics/stopwatch.go @@ -0,0 +1,43 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +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) +} diff --git a/vendor/github.com/uber/jaeger-lib/metrics/timer.go b/vendor/github.com/uber/jaeger-lib/metrics/timer.go new file mode 100644 index 000000000..e18d222ab --- /dev/null +++ b/vendor/github.com/uber/jaeger-lib/metrics/timer.go @@ -0,0 +1,33 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +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) {} |