added noop adapter

Author: asmyasnikov

otel/noop.go

@@ -0,0 +1,37 @@
+package otel
+
+import (
+	"context"
+
+	"github.com/ydb-platform/ydb-go-sdk/v3/trace"
+)
+
+var (
+	_ Config = noopConfig{}
+	_ Span   = noopSpan{}
+)
+
+type (
+	noopConfig struct{}
+	noopSpan   struct{}
+)
+
+func (noopSpan) TraceID() string {
+	return ""
+}
+
+func (n noopSpan) Msg(string, ...KeyValue) {}
+
+func (n noopSpan) End(...KeyValue) {}
+
+func (noopConfig) Details() trace.Details {
+	return 0
+}
+
+func (noopConfig) SpanFromContext(context.Context) Span {
+	return noopSpan{}
+}
+
+func (noopConfig) Start(ctx context.Context, _ string, _ ...KeyValue) (context.Context, Span) {
+	return ctx, noopSpan{}
+}