/
otel.go
89 lines (73 loc) · 2.27 KB
/
otel.go
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package trace
import (
"context"
"fmt"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/exporters/jaeger"
"go.opentelemetry.io/otel/sdk/resource"
tracesdk "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.12.0"
oteltrace "go.opentelemetry.io/otel/trace"
"log"
"os"
)
var tracer oteltrace.Tracer
func Tracer() oteltrace.Tracer {
return tracer
}
type traceProvider struct {
service string
jaegerService string
tracer oteltrace.Tracer
}
func NewTraceProvider(service, jaegerService string) *traceProvider {
return &traceProvider{service: service, jaegerService: jaegerService}
}
func (trace *traceProvider) Generate() (*tracesdk.TracerProvider, error) {
epJaeger := fmt.Sprintf("%s/api/traces", trace.jaegerService)
exp, err := jaeger.New(jaeger.WithCollectorEndpoint(jaeger.WithEndpoint(epJaeger)))
if err != nil {
return nil, err
}
tp := tracesdk.NewTracerProvider(
tracesdk.WithSampler(tracesdk.AlwaysSample()),
tracesdk.WithSampler(tracesdk.TraceIDRatioBased(1)),
// Always be sure to batch in production.
tracesdk.WithBatcher(exp),
// Record information about this application in a Resource.
tracesdk.WithResource(resource.NewWithAttributes(
semconv.SchemaURL,
semconv.ServiceNameKey.String(trace.service),
attribute.String("environment", os.Getenv("GIN_MODE")),
)),
)
return tp, nil
}
func (trace *traceProvider) SetProvider() {
tp, err := trace.Generate()
if err != nil {
log.Fatal(err)
}
otel.SetTracerProvider(tp)
tr := otel.Tracer(trace.service)
trace.tracer = tr
tracer = tr
}
func (trace *traceProvider) GetTracerWithService(service string) *oteltrace.Tracer {
tr := otel.Tracer(service)
return &tr
}
func (trace *traceProvider) GetTracer() oteltrace.Tracer {
return trace.tracer
}
func (trace *traceProvider) ParentContext(ctx context.Context, TraceID, SpanID string) context.Context {
traceID, _ := oteltrace.TraceIDFromHex(TraceID)
spanID, _ := oteltrace.SpanIDFromHex(SpanID)
var spanContextConfig oteltrace.SpanContextConfig
spanContextConfig.TraceID = traceID
spanContextConfig.SpanID = spanID
spanContext := oteltrace.NewSpanContext(spanContextConfig)
parentContext := oteltrace.ContextWithSpanContext(ctx, spanContext)
return parentContext
}