You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
2.4 KiB
77 lines
2.4 KiB
3 years ago
|
package tracing
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
"net/http"
|
||
|
|
"testing"
|
||
|
|
|
||
|
|
"github.com/go-kratos/kratos/v2/transport"
|
||
|
|
"go.opentelemetry.io/otel/propagation"
|
||
|
|
tracesdk "go.opentelemetry.io/otel/sdk/trace"
|
||
|
|
"go.opentelemetry.io/otel/trace"
|
||
|
|
)
|
||
|
|
|
||
|
|
var (
|
||
|
|
_ transport.Transporter = &Transport{}
|
||
|
|
)
|
||
|
|
|
||
|
|
type headerCarrier http.Header
|
||
|
|
|
||
|
|
// Get returns the value associated with the passed key.
|
||
|
|
func (hc headerCarrier) Get(key string) string {
|
||
|
|
return http.Header(hc).Get(key)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Set stores the key-value pair.
|
||
|
|
func (hc headerCarrier) Set(key string, value string) {
|
||
|
|
http.Header(hc).Set(key, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Keys lists the keys stored in this carrier.
|
||
|
|
func (hc headerCarrier) Keys() []string {
|
||
|
|
keys := make([]string, 0, len(hc))
|
||
|
|
for k := range http.Header(hc) {
|
||
|
|
keys = append(keys, k)
|
||
|
|
}
|
||
|
|
return keys
|
||
|
|
}
|
||
|
|
|
||
|
|
type Transport struct {
|
||
|
|
kind transport.Kind
|
||
|
|
endpoint string
|
||
|
|
operation string
|
||
|
|
header headerCarrier
|
||
|
|
}
|
||
|
|
|
||
|
|
func (tr *Transport) Kind() transport.Kind { return tr.kind }
|
||
|
|
func (tr *Transport) Endpoint() string { return tr.endpoint }
|
||
|
|
func (tr *Transport) Operation() string { return tr.operation }
|
||
|
|
func (tr *Transport) Header() transport.Header { return tr.header }
|
||
|
|
|
||
|
|
func TestTracing(t *testing.T) {
|
||
|
|
var carrier = headerCarrier{}
|
||
|
|
tp := tracesdk.NewTracerProvider(tracesdk.WithSampler(tracesdk.TraceIDRatioBased(0)))
|
||
|
|
|
||
|
|
// caller use Inject
|
||
|
|
tracer := NewTracer(trace.SpanKindClient, WithTracerProvider(tp), WithPropagators(propagation.NewCompositeTextMapPropagator(propagation.Baggage{}, propagation.TraceContext{})))
|
||
|
|
ts := &Transport{kind: transport.KindHTTP, header: carrier}
|
||
|
|
|
||
|
|
ctx, aboveSpan := tracer.Start(transport.NewClientContext(context.Background(), ts), ts.Kind().String(), ts.Operation(), ts.Header())
|
||
|
|
defer tracer.End(ctx, aboveSpan, nil)
|
||
|
|
|
||
|
|
// server use Extract fetch traceInfo from carrier
|
||
|
|
tracer = NewTracer(trace.SpanKindServer, WithPropagators(propagation.NewCompositeTextMapPropagator(propagation.Baggage{}, propagation.TraceContext{})))
|
||
|
|
ts = &Transport{kind: transport.KindHTTP, header: carrier}
|
||
|
|
|
||
|
|
ctx, span := tracer.Start(transport.NewServerContext(ctx, ts), ts.Kind().String(), ts.Operation(), ts.Header())
|
||
|
|
defer tracer.End(ctx, span, nil)
|
||
|
|
|
||
|
|
if aboveSpan.SpanContext().TraceID() != span.SpanContext().TraceID() {
|
||
|
|
t.Fatalf("TraceID failed to deliver")
|
||
|
|
}
|
||
|
|
|
||
|
|
if v, ok := transport.FromClientContext(ctx); !ok || len(v.Header().Keys()) == 0 {
|
||
|
|
t.Fatalf("traceHeader failed to deliver")
|
||
|
|
}
|
||
|
|
}
|