utils

Documentation

Index

• func AddNewTagKey(views []*view.View, key *tag.Key) []*view.View
• func AddTagKeyToCtx(ctx context.Context, key tag.Key, value string) context.Context
• func GetTraceSamplingRate(rate string) float64
• func IsTracingEnabled(rate string) bool
• func NewMeasureView(measure stats.Measure, keys []tag.Key, aggregation *view.Aggregation) *view.View
• func SpanFromContext(ctx context.Context) *trace.Span
• func SpanToFastHTTPContext(ctx *fasthttp.RequestCtx, span *trace.Span)
• func TraceSampler(samplingRate string) trace.StartOption
• func WithTags(opts ...interface{}) []tag.Mutator
• type StdoutExporter
  • func (e *StdoutExporter) ExportSpan(sd *trace.SpanData)

Functions

func AddNewTagKey

func AddNewTagKey(views []*view.View, key *tag.Key) []*view.View

AddNewTagKey adds new tag keys to existing view.

func AddTagKeyToCtx

func AddTagKeyToCtx(ctx context.Context, key tag.Key, value string) context.Context

AddTagKeyToCtx assigns opencensus tag key value to context.

func GetTraceSamplingRate

func GetTraceSamplingRate(rate string) float64

GetTraceSamplingRate parses the given rate and returns the parsed rate.

func IsTracingEnabled

func IsTracingEnabled(rate string) bool

IsTracingEnabled parses the given rate and returns false if sampling rate is explicitly set 0.

func NewMeasureView

func NewMeasureView(measure stats.Measure, keys []tag.Key, aggregation *view.Aggregation) *view.View

NewMeasureView creates opencensus View instance using stats.Measure.

func SpanFromContext

func SpanFromContext(ctx context.Context) *trace.Span

SpanFromContext returns the SpanContext stored in a context, or nil if there isn't one.

func SpanToFastHTTPContext

func SpanToFastHTTPContext(ctx *fasthttp.RequestCtx, span *trace.Span)

SpanToFastHTTPContext sets span into fasthttp.RequestCtx.

func TraceSampler

func TraceSampler(samplingRate string) trace.StartOption

TraceSampler returns Probability Sampler option.

func WithTags

func WithTags(opts ...interface{}) []tag.Mutator

WithTags converts tag key and value pairs to tag.Mutator array. WithTags(key1, value1, key2, value2) returns []tag.Mutator{tag.Upsert(key1, value1), tag.Upsert(key2, value2)}.

Types

type StdoutExporter

type StdoutExporter struct{}

StdoutExporter is an open census exporter that writes to stdout.

func (*StdoutExporter) ExportSpan

func (e *StdoutExporter) ExportSpan(sd *trace.SpanData)

ExportSpan implements the open census exporter interface.