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206aa3c203
* update vendor directory, add go.opencensus.io * update imports * oops * s/opentracing/opencensus/ & remove prometheus / zipkin stuff & remove old stats * the dep train rides again * fix gin build * deps from last guy * start in on the agent metrics * she builds * remove tags for now, cardinality error is fussing. subscribe instead of register * update to patched version of opencensus to proceed for now TODO switch to a release * meh fix imports * println debug the bad boys * lace it with the tags * update deps again * fix all inconsistent cardinality errors * add our own logger * fix init * fix oom measure * remove bugged removal code * fix s3 measures * fix prom handler nil
117 lines
2.9 KiB
Go
117 lines
2.9 KiB
Go
/*
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Package idgenerator contains several Span and Trace ID generators which can be
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used by the Zipkin tracer. Additional third party generators can be plugged in
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if they adhere to the IDGenerator interface.
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*/
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package idgenerator
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import (
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"math/rand"
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"sync"
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"time"
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"github.com/openzipkin/zipkin-go/model"
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)
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var (
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seededIDGen = rand.New(rand.NewSource(time.Now().UnixNano()))
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// NewSource returns a new pseudo-random Source seeded with the given value.
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// Unlike the default Source used by top-level functions, this source is not
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// safe for concurrent use by multiple goroutines. Hence the need for a mutex.
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seededIDLock sync.Mutex
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)
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// IDGenerator interface can be used to provide the Zipkin Tracer with custom
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// implementations to generate Span and Trace IDs.
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type IDGenerator interface {
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SpanID(traceID model.TraceID) model.ID // Generates a new Span ID
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TraceID() model.TraceID // Generates a new Trace ID
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}
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// NewRandom64 returns an ID Generator which can generate 64 bit trace and span
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// id's
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func NewRandom64() IDGenerator {
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return &randomID64{}
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}
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// NewRandom128 returns an ID Generator which can generate 128 bit trace and 64
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// bit span id's
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func NewRandom128() IDGenerator {
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return &randomID128{}
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}
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// NewRandomTimestamped generates 128 bit time sortable traceid's and 64 bit
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// spanid's.
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func NewRandomTimestamped() IDGenerator {
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return &randomTimestamped{}
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}
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// randomID64 can generate 64 bit traceid's and 64 bit spanid's.
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type randomID64 struct{}
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func (r *randomID64) TraceID() (id model.TraceID) {
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seededIDLock.Lock()
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id = model.TraceID{
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Low: uint64(seededIDGen.Int63()),
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}
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seededIDLock.Unlock()
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return
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}
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func (r *randomID64) SpanID(traceID model.TraceID) (id model.ID) {
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if !traceID.Empty() {
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return model.ID(traceID.Low)
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}
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seededIDLock.Lock()
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id = model.ID(seededIDGen.Int63())
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seededIDLock.Unlock()
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return
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}
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// randomID128 can generate 128 bit traceid's and 64 bit spanid's.
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type randomID128 struct{}
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func (r *randomID128) TraceID() (id model.TraceID) {
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seededIDLock.Lock()
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id = model.TraceID{
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High: uint64(seededIDGen.Int63()),
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Low: uint64(seededIDGen.Int63()),
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}
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seededIDLock.Unlock()
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return
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}
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func (r *randomID128) SpanID(traceID model.TraceID) (id model.ID) {
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if !traceID.Empty() {
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return model.ID(traceID.Low)
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}
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seededIDLock.Lock()
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id = model.ID(seededIDGen.Int63())
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seededIDLock.Unlock()
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return
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}
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// randomTimestamped can generate 128 bit time sortable traceid's compatible
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// with AWS X-Ray and 64 bit spanid's.
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type randomTimestamped struct{}
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func (t *randomTimestamped) TraceID() (id model.TraceID) {
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seededIDLock.Lock()
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id = model.TraceID{
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High: uint64(time.Now().Unix()<<32) + uint64(seededIDGen.Int31()),
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Low: uint64(seededIDGen.Int63()),
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}
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seededIDLock.Unlock()
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return
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}
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func (t *randomTimestamped) SpanID(traceID model.TraceID) (id model.ID) {
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if !traceID.Empty() {
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return model.ID(traceID.Low)
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}
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seededIDLock.Lock()
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id = model.ID(seededIDGen.Int63())
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seededIDLock.Unlock()
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return
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}
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