Convert webfinger to use service trace provider

services/webfinger/pkg/service/v0/tracing.go

@@ -4,21 +4,22 @@ import (
 	"context"
 	"net/url"
 
-	webfingertracing "github.com/owncloud/ocis/v2/services/webfinger/pkg/tracing"
 	"github.com/owncloud/ocis/v2/services/webfinger/pkg/webfinger"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/trace"
 )
 
 // NewTracing returns a service that instruments traces.
-func NewTracing(next Service) Service {
+func NewTracing(next Service, tp trace.TracerProvider) Service {
 	return tracing{
 		next: next,
+		tp:   tp,
 	}
 }
 
 type tracing struct {
 	next Service
+	tp   trace.TracerProvider
 }
 
 // Webfinger implements the Service interface.
@@ -30,7 +31,7 @@ func (t tracing) Webfinger(ctx context.Context, queryTarget *url.URL, rels []str
 			attribute.KeyValue{Key: "rels", Value: attribute.StringSliceValue(rels)},
 		),
 	}
-	ctx, span := webfingertracing.TraceProvider.Tracer("webfinger").Start(ctx, "Webfinger", spanOpts...)
+	ctx, span := t.tp.Tracer("webfinger").Start(ctx, "Webfinger", spanOpts...)
 	defer span.End()
 
 	return t.next.Webfinger(ctx, queryTarget, rels)