49 lines
1.6 KiB
Go
49 lines
1.6 KiB
Go
// Copyright 2018-2021 CERN
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
//
|
|
// In applying this license, CERN does not waive the privileges and immunities
|
|
// granted to it by virtue of its status as an Intergovernmental Organization
|
|
// or submit itself to any jurisdiction.
|
|
|
|
package trace
|
|
|
|
import (
|
|
"context"
|
|
|
|
"go.opentelemetry.io/otel/trace"
|
|
"go.opentelemetry.io/otel/trace/noop"
|
|
)
|
|
|
|
type ctxKey struct{}
|
|
|
|
// ContextSetTracerProvider returns a copy of ctx with p associated.
|
|
func ContextSetTracerProvider(ctx context.Context, p trace.TracerProvider) context.Context {
|
|
if tp, ok := ctx.Value(ctxKey{}).(trace.TracerProvider); ok {
|
|
if tp == p {
|
|
return ctx
|
|
}
|
|
}
|
|
return context.WithValue(ctx, ctxKey{}, p)
|
|
}
|
|
|
|
// ContextGetTracerProvider returns the TracerProvider associated with the ctx.
|
|
// If no TracerProvider is associated is associated, the global default TracerProvider
|
|
// is returned
|
|
func ContextGetTracerProvider(ctx context.Context) trace.TracerProvider {
|
|
if p, ok := ctx.Value(ctxKey{}).(trace.TracerProvider); ok {
|
|
return p
|
|
}
|
|
return noop.NewTracerProvider()
|
|
}
|