/
propagator.go
83 lines (71 loc) · 2.13 KB
/
propagator.go
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package models
import (
"context"
"net/http"
"github.com/kubeshop/xk6-tracetest/utils"
"go.opentelemetry.io/contrib/propagators/aws/xray"
"go.opentelemetry.io/contrib/propagators/b3"
"go.opentelemetry.io/contrib/propagators/jaeger"
"go.opentelemetry.io/contrib/propagators/ot"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/trace"
)
type PropagatorName string
type Propagator struct {
propagators []PropagatorName
}
const (
TraceContext PropagatorName = "tracecontext"
Baggage PropagatorName = "baggage"
PropagatorB3 PropagatorName = "b3"
OT PropagatorName = "ot"
Jaeger PropagatorName = "jaeger"
XRay PropagatorName = "xray"
)
func NewPropagator(propagators []PropagatorName) Propagator {
return Propagator{
propagators: propagators,
}
}
func (p Propagator) GenerateHeaders(traceID string) http.Header {
ctx := context.Background()
spanContext := NewSpanContext(traceID)
ctx = trace.ContextWithSpanContext(ctx, spanContext)
header := http.Header{}
carrier := propagation.MapCarrier{}
otel.GetTextMapPropagator().Inject(ctx, carrier)
propagator := p.getTextMapPropagator()
propagator.Inject(ctx, propagation.HeaderCarrier(header))
return header
}
func (p Propagator) getTextMapPropagator() propagation.TextMapPropagator {
propagators := make([]propagation.TextMapPropagator, len(p.propagators))
for i, propagator := range p.propagators {
switch propagator {
case Jaeger:
propagators[i] = jaeger.Jaeger{}
case OT:
propagators[i] = ot.OT{}
case PropagatorB3:
propagators[i] = b3.New()
case XRay:
propagators[i] = xray.Propagator{}
case TraceContext:
propagators[i] = propagation.TraceContext{}
case Baggage:
propagators[i] = propagation.Baggage{}
}
}
return propagation.NewCompositeTextMapPropagator(propagators...)
}
func NewSpanContext(traceID string) trace.SpanContext {
parsedTraceID, _ := trace.TraceIDFromHex(traceID)
var tf trace.TraceFlags
return trace.NewSpanContext(trace.SpanContextConfig{
TraceID: parsedTraceID,
SpanID: utils.SpanID(),
TraceFlags: tf.WithSampled(true),
Remote: true,
})
}