ot

Documentation

Overview

Package ot implements the ot-tracer-* propagator used by the default Tracer implementation from the OpenTracing project.

Index

• func SemVersion() string
• func Version() string
• type OT
  • func (o OT) Extract(ctx context.Context, carrier propagation.TextMapCarrier) context.Context
  • func (o OT) Fields() []string
  • func (o OT) Inject(ctx context.Context, carrier propagation.TextMapCarrier)

Examples

• OT

Functions

func SemVersion

func SemVersion() string

SemVersion is the semantic version to be supplied to tracer/meter creation.

Deprecated: Use Version instead.

func Version

func Version() string

Version is the current release version of the ot propagator.

Types

type OT

type OT struct{}

OT propagator serializes SpanContext to/from ot-trace-* headers.

Example

package main

import (
	"go.opentelemetry.io/contrib/propagators/ot"
	"go.opentelemetry.io/otel"
)

func main() {
	otPropagator := ot.OT{}
	// register ot propagator
	otel.SetTextMapPropagator(otPropagator)
}

func (OT) Extract

func (o OT) Extract(ctx context.Context, carrier propagation.TextMapCarrier) context.Context

Extract extracts a context from the carrier if it contains OT headers.

func (OT) Fields

func (o OT) Fields() []string

Fields returns the OT header keys whose values are set with Inject.

func (OT) Inject

func (o OT) Inject(ctx context.Context, carrier propagation.TextMapCarrier)

Inject injects a context into the carrier as OT headers. NOTE: In order to interop with systems that use the OT header format, trace ids MUST be 64-bits.