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-rw-r--r--vendor/github.com/uber/jaeger-client-go/tracer.go491
1 files changed, 0 insertions, 491 deletions
diff --git a/vendor/github.com/uber/jaeger-client-go/tracer.go b/vendor/github.com/uber/jaeger-client-go/tracer.go
deleted file mode 100644
index 477c6eae3..000000000
--- a/vendor/github.com/uber/jaeger-client-go/tracer.go
+++ /dev/null
@@ -1,491 +0,0 @@
-// Copyright (c) 2017-2018 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 jaeger
-
-import (
- "fmt"
- "io"
- "math/rand"
- "os"
- "reflect"
- "strconv"
- "sync"
- "time"
-
- "github.com/opentracing/opentracing-go"
- "github.com/opentracing/opentracing-go/ext"
-
- "github.com/uber/jaeger-client-go/internal/baggage"
- "github.com/uber/jaeger-client-go/internal/throttler"
- "github.com/uber/jaeger-client-go/log"
- "github.com/uber/jaeger-client-go/utils"
-)
-
-// Tracer implements opentracing.Tracer.
-type Tracer struct {
- serviceName string
- hostIPv4 uint32 // this is for zipkin endpoint conversion
-
- sampler SamplerV2
- reporter Reporter
- metrics Metrics
- logger log.DebugLogger
-
- timeNow func() time.Time
- randomNumber func() uint64
-
- options struct {
- gen128Bit bool // whether to generate 128bit trace IDs
- zipkinSharedRPCSpan bool
- highTraceIDGenerator func() uint64 // custom high trace ID generator
- maxTagValueLength int
- noDebugFlagOnForcedSampling bool
- maxLogsPerSpan int
- // more options to come
- }
- // allocator of Span objects
- spanAllocator SpanAllocator
-
- injectors map[interface{}]Injector
- extractors map[interface{}]Extractor
-
- observer compositeObserver
-
- tags []Tag
- process Process
-
- baggageRestrictionManager baggage.RestrictionManager
- baggageSetter *baggageSetter
-
- debugThrottler throttler.Throttler
-}
-
-// NewTracer creates Tracer implementation that reports tracing to Jaeger.
-// The returned io.Closer can be used in shutdown hooks to ensure that the internal
-// queue of the Reporter is drained and all buffered spans are submitted to collectors.
-// TODO (breaking change) return *Tracer only, without closer.
-func NewTracer(
- serviceName string,
- sampler Sampler,
- reporter Reporter,
- options ...TracerOption,
-) (opentracing.Tracer, io.Closer) {
- t := &Tracer{
- serviceName: serviceName,
- sampler: samplerV1toV2(sampler),
- reporter: reporter,
- injectors: make(map[interface{}]Injector),
- extractors: make(map[interface{}]Extractor),
- metrics: *NewNullMetrics(),
- spanAllocator: simpleSpanAllocator{},
- }
-
- for _, option := range options {
- option(t)
- }
-
- // register default injectors/extractors unless they are already provided via options
- textPropagator := NewTextMapPropagator(getDefaultHeadersConfig(), t.metrics)
- t.addCodec(opentracing.TextMap, textPropagator, textPropagator)
-
- httpHeaderPropagator := NewHTTPHeaderPropagator(getDefaultHeadersConfig(), t.metrics)
- t.addCodec(opentracing.HTTPHeaders, httpHeaderPropagator, httpHeaderPropagator)
-
- binaryPropagator := NewBinaryPropagator(t)
- t.addCodec(opentracing.Binary, binaryPropagator, binaryPropagator)
-
- // TODO remove after TChannel supports OpenTracing
- interopPropagator := &jaegerTraceContextPropagator{tracer: t}
- t.addCodec(SpanContextFormat, interopPropagator, interopPropagator)
-
- zipkinPropagator := &zipkinPropagator{tracer: t}
- t.addCodec(ZipkinSpanFormat, zipkinPropagator, zipkinPropagator)
-
- if t.baggageRestrictionManager != nil {
- t.baggageSetter = newBaggageSetter(t.baggageRestrictionManager, &t.metrics)
- } else {
- t.baggageSetter = newBaggageSetter(baggage.NewDefaultRestrictionManager(0), &t.metrics)
- }
- if t.debugThrottler == nil {
- t.debugThrottler = throttler.DefaultThrottler{}
- }
-
- if t.randomNumber == nil {
- seedGenerator := utils.NewRand(time.Now().UnixNano())
- pool := sync.Pool{
- New: func() interface{} {
- return rand.NewSource(seedGenerator.Int63())
- },
- }
-
- t.randomNumber = func() uint64 {
- generator := pool.Get().(rand.Source)
- number := uint64(generator.Int63())
- pool.Put(generator)
- return number
- }
- }
- if t.timeNow == nil {
- t.timeNow = time.Now
- }
- if t.logger == nil {
- t.logger = log.NullLogger
- }
- // Set tracer-level tags
- t.tags = append(t.tags, Tag{key: JaegerClientVersionTagKey, value: JaegerClientVersion})
- if hostname, err := os.Hostname(); err == nil {
- t.tags = append(t.tags, Tag{key: TracerHostnameTagKey, value: hostname})
- }
- if ipval, ok := t.getTag(TracerIPTagKey); ok {
- ipv4, err := utils.ParseIPToUint32(ipval.(string))
- if err != nil {
- t.hostIPv4 = 0
- t.logger.Error("Unable to convert the externally provided ip to uint32: " + err.Error())
- } else {
- t.hostIPv4 = ipv4
- }
- } else if ip, err := utils.HostIP(); err == nil {
- t.tags = append(t.tags, Tag{key: TracerIPTagKey, value: ip.String()})
- t.hostIPv4 = utils.PackIPAsUint32(ip)
- } else {
- t.logger.Error("Unable to determine this host's IP address: " + err.Error())
- }
-
- if t.options.gen128Bit {
- if t.options.highTraceIDGenerator == nil {
- t.options.highTraceIDGenerator = t.randomNumber
- }
- } else if t.options.highTraceIDGenerator != nil {
- t.logger.Error("Overriding high trace ID generator but not generating " +
- "128 bit trace IDs, consider enabling the \"Gen128Bit\" option")
- }
- if t.options.maxTagValueLength == 0 {
- t.options.maxTagValueLength = DefaultMaxTagValueLength
- }
- t.process = Process{
- Service: serviceName,
- UUID: strconv.FormatUint(t.randomNumber(), 16),
- Tags: t.tags,
- }
- if throttler, ok := t.debugThrottler.(ProcessSetter); ok {
- throttler.SetProcess(t.process)
- }
-
- return t, t
-}
-
-// addCodec adds registers injector and extractor for given propagation format if not already defined.
-func (t *Tracer) addCodec(format interface{}, injector Injector, extractor Extractor) {
- if _, ok := t.injectors[format]; !ok {
- t.injectors[format] = injector
- }
- if _, ok := t.extractors[format]; !ok {
- t.extractors[format] = extractor
- }
-}
-
-// StartSpan implements StartSpan() method of opentracing.Tracer.
-func (t *Tracer) StartSpan(
- operationName string,
- options ...opentracing.StartSpanOption,
-) opentracing.Span {
- sso := opentracing.StartSpanOptions{}
- for _, o := range options {
- o.Apply(&sso)
- }
- return t.startSpanWithOptions(operationName, sso)
-}
-
-func (t *Tracer) startSpanWithOptions(
- operationName string,
- options opentracing.StartSpanOptions,
-) opentracing.Span {
- if options.StartTime.IsZero() {
- options.StartTime = t.timeNow()
- }
-
- // Predicate whether the given span context is an empty reference
- // or may be used as parent / debug ID / baggage items source
- isEmptyReference := func(ctx SpanContext) bool {
- return !ctx.IsValid() && !ctx.isDebugIDContainerOnly() && len(ctx.baggage) == 0
- }
-
- var references []Reference
- var parent SpanContext
- var hasParent bool // need this because `parent` is a value, not reference
- var ctx SpanContext
- var isSelfRef bool
- for _, ref := range options.References {
- ctxRef, ok := ref.ReferencedContext.(SpanContext)
- if !ok {
- t.logger.Error(fmt.Sprintf(
- "Reference contains invalid type of SpanReference: %s",
- reflect.ValueOf(ref.ReferencedContext)))
- continue
- }
- if isEmptyReference(ctxRef) {
- continue
- }
-
- if ref.Type == selfRefType {
- isSelfRef = true
- ctx = ctxRef
- continue
- }
-
- if ctxRef.IsValid() {
- // we don't want empty context that contains only debug-id or baggage
- references = append(references, Reference{Type: ref.Type, Context: ctxRef})
- }
-
- if !hasParent {
- parent = ctxRef
- hasParent = ref.Type == opentracing.ChildOfRef
- }
- }
- if !hasParent && !isEmptyReference(parent) {
- // If ChildOfRef wasn't found but a FollowFromRef exists, use the context from
- // the FollowFromRef as the parent
- hasParent = true
- }
-
- rpcServer := false
- if v, ok := options.Tags[ext.SpanKindRPCServer.Key]; ok {
- rpcServer = (v == ext.SpanKindRPCServerEnum || v == string(ext.SpanKindRPCServerEnum))
- }
-
- var internalTags []Tag
- newTrace := false
- if !isSelfRef {
- if !hasParent || !parent.IsValid() {
- newTrace = true
- ctx.traceID.Low = t.randomID()
- if t.options.gen128Bit {
- ctx.traceID.High = t.options.highTraceIDGenerator()
- }
- ctx.spanID = SpanID(ctx.traceID.Low)
- ctx.parentID = 0
- ctx.samplingState = &samplingState{
- localRootSpan: ctx.spanID,
- }
- if hasParent && parent.isDebugIDContainerOnly() && t.isDebugAllowed(operationName) {
- ctx.samplingState.setDebugAndSampled()
- internalTags = append(internalTags, Tag{key: JaegerDebugHeader, value: parent.debugID})
- }
- } else {
- ctx.traceID = parent.traceID
- if rpcServer && t.options.zipkinSharedRPCSpan {
- // Support Zipkin's one-span-per-RPC model
- ctx.spanID = parent.spanID
- ctx.parentID = parent.parentID
- } else {
- ctx.spanID = SpanID(t.randomID())
- ctx.parentID = parent.spanID
- }
- ctx.samplingState = parent.samplingState
- if parent.remote {
- ctx.samplingState.setFinal()
- ctx.samplingState.localRootSpan = ctx.spanID
- }
- }
- if hasParent {
- // copy baggage items
- if l := len(parent.baggage); l > 0 {
- ctx.baggage = make(map[string]string, len(parent.baggage))
- for k, v := range parent.baggage {
- ctx.baggage[k] = v
- }
- }
- }
- }
-
- sp := t.newSpan()
- sp.context = ctx
- sp.tracer = t
- sp.operationName = operationName
- sp.startTime = options.StartTime
- sp.duration = 0
- sp.references = references
- sp.firstInProcess = rpcServer || sp.context.parentID == 0
-
- if !sp.isSamplingFinalized() {
- decision := t.sampler.OnCreateSpan(sp)
- sp.applySamplingDecision(decision, false)
- }
- sp.observer = t.observer.OnStartSpan(sp, operationName, options)
-
- if tagsTotalLength := len(options.Tags) + len(internalTags); tagsTotalLength > 0 {
- if sp.tags == nil || cap(sp.tags) < tagsTotalLength {
- sp.tags = make([]Tag, 0, tagsTotalLength)
- }
- sp.tags = append(sp.tags, internalTags...)
- for k, v := range options.Tags {
- sp.setTagInternal(k, v, false)
- }
- }
- t.emitNewSpanMetrics(sp, newTrace)
- return sp
-}
-
-// Inject implements Inject() method of opentracing.Tracer
-func (t *Tracer) Inject(ctx opentracing.SpanContext, format interface{}, carrier interface{}) error {
- c, ok := ctx.(SpanContext)
- if !ok {
- return opentracing.ErrInvalidSpanContext
- }
- if injector, ok := t.injectors[format]; ok {
- return injector.Inject(c, carrier)
- }
- return opentracing.ErrUnsupportedFormat
-}
-
-// Extract implements Extract() method of opentracing.Tracer
-func (t *Tracer) Extract(
- format interface{},
- carrier interface{},
-) (opentracing.SpanContext, error) {
- if extractor, ok := t.extractors[format]; ok {
- spanCtx, err := extractor.Extract(carrier)
- if err != nil {
- return nil, err // ensure returned spanCtx is nil
- }
- spanCtx.remote = true
- return spanCtx, nil
- }
- return nil, opentracing.ErrUnsupportedFormat
-}
-
-// Close releases all resources used by the Tracer and flushes any remaining buffered spans.
-func (t *Tracer) Close() error {
- t.logger.Debugf("closing tracer")
- t.reporter.Close()
- t.sampler.Close()
- if mgr, ok := t.baggageRestrictionManager.(io.Closer); ok {
- _ = mgr.Close()
- }
- if throttler, ok := t.debugThrottler.(io.Closer); ok {
- _ = throttler.Close()
- }
- return nil
-}
-
-// Tags returns a slice of tracer-level tags.
-func (t *Tracer) Tags() []opentracing.Tag {
- tags := make([]opentracing.Tag, len(t.tags))
- for i, tag := range t.tags {
- tags[i] = opentracing.Tag{Key: tag.key, Value: tag.value}
- }
- return tags
-}
-
-// getTag returns the value of specific tag, if not exists, return nil.
-// TODO only used by tests, move there.
-func (t *Tracer) getTag(key string) (interface{}, bool) {
- for _, tag := range t.tags {
- if tag.key == key {
- return tag.value, true
- }
- }
- return nil, false
-}
-
-// newSpan returns an instance of a clean Span object.
-// If options.PoolSpans is true, the spans are retrieved from an object pool.
-func (t *Tracer) newSpan() *Span {
- return t.spanAllocator.Get()
-}
-
-// emitNewSpanMetrics generates metrics on the number of started spans and traces.
-// newTrace param: we cannot simply check for parentID==0 because in Zipkin model the
-// server-side RPC span has the exact same trace/span/parent IDs as the
-// calling client-side span, but obviously the server side span is
-// no longer a root span of the trace.
-func (t *Tracer) emitNewSpanMetrics(sp *Span, newTrace bool) {
- if !sp.isSamplingFinalized() {
- t.metrics.SpansStartedDelayedSampling.Inc(1)
- if newTrace {
- t.metrics.TracesStartedDelayedSampling.Inc(1)
- }
- // joining a trace is not possible, because sampling decision inherited from upstream is final
- } else if sp.context.IsSampled() {
- t.metrics.SpansStartedSampled.Inc(1)
- if newTrace {
- t.metrics.TracesStartedSampled.Inc(1)
- } else if sp.firstInProcess {
- t.metrics.TracesJoinedSampled.Inc(1)
- }
- } else {
- t.metrics.SpansStartedNotSampled.Inc(1)
- if newTrace {
- t.metrics.TracesStartedNotSampled.Inc(1)
- } else if sp.firstInProcess {
- t.metrics.TracesJoinedNotSampled.Inc(1)
- }
- }
-}
-
-func (t *Tracer) reportSpan(sp *Span) {
- if !sp.isSamplingFinalized() {
- t.metrics.SpansFinishedDelayedSampling.Inc(1)
- } else if sp.context.IsSampled() {
- t.metrics.SpansFinishedSampled.Inc(1)
- } else {
- t.metrics.SpansFinishedNotSampled.Inc(1)
- }
-
- // Note: if the reporter is processing Span asynchronously then it needs to Retain() the span,
- // and then Release() it when no longer needed.
- // Otherwise, the span may be reused for another trace and its data may be overwritten.
- if sp.context.IsSampled() {
- t.reporter.Report(sp)
- }
-
- sp.Release()
-}
-
-// randomID generates a random trace/span ID, using tracer.random() generator.
-// It never returns 0.
-func (t *Tracer) randomID() uint64 {
- val := t.randomNumber()
- for val == 0 {
- val = t.randomNumber()
- }
- return val
-}
-
-// (NB) span must hold the lock before making this call
-func (t *Tracer) setBaggage(sp *Span, key, value string) {
- t.baggageSetter.setBaggage(sp, key, value)
-}
-
-// (NB) span must hold the lock before making this call
-func (t *Tracer) isDebugAllowed(operation string) bool {
- return t.debugThrottler.IsAllowed(operation)
-}
-
-// Sampler returns the sampler given to the tracer at creation.
-func (t *Tracer) Sampler() SamplerV2 {
- return t.sampler
-}
-
-// SelfRef creates an opentracing compliant SpanReference from a jaeger
-// SpanContext. This is a factory function in order to encapsulate jaeger specific
-// types.
-func SelfRef(ctx SpanContext) opentracing.SpanReference {
- return opentracing.SpanReference{
- Type: selfRefType,
- ReferencedContext: ctx,
- }
-}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-18 20:33:09 +0000