mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-04 09:43:23 +02:00
20c93b01eb
* Update SamplingParameters Remove HasRemoteParent fields from SamplingParameters. The HasRemoteParent field is a duplicate of the Remote field of the parent span context contained in the ParentContext. Change the `ParentContext` field from storing a `SpanContext` to a `context.Context` that holds the parent span. This is to conform with the OpenTelemetry specification and resolve #1727. * Update PR number
62 lines
2.3 KiB
Go
62 lines
2.3 KiB
Go
// Copyright The OpenTelemetry Authors
|
|
//
|
|
// 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.
|
|
|
|
package trace // import "go.opentelemetry.io/otel/trace"
|
|
|
|
import "context"
|
|
|
|
type traceContextKeyType int
|
|
|
|
const currentSpanKey traceContextKeyType = iota
|
|
|
|
// ContextWithSpan returns a copy of parent with span set as the current Span.
|
|
func ContextWithSpan(parent context.Context, span Span) context.Context {
|
|
return context.WithValue(parent, currentSpanKey, span)
|
|
}
|
|
|
|
// ContextWithSpanContext returns a copy of parent with sc as the current
|
|
// Span. The Span implementation that wraps sc is non-recording and performs
|
|
// no operations other than to return sc as the SpanContext from the
|
|
// SpanContext method.
|
|
func ContextWithSpanContext(parent context.Context, sc SpanContext) context.Context {
|
|
return ContextWithSpan(parent, nonRecordingSpan{sc: sc})
|
|
}
|
|
|
|
// ContextWithRemoteSpanContext returns a copy of parent with rsc set explicly
|
|
// as a remote SpanContext and as the current Span. The Span implementation
|
|
// that wraps rsc is non-recording and performs no operations other than to
|
|
// return rsc as the SpanContext from the SpanContext method.
|
|
func ContextWithRemoteSpanContext(parent context.Context, rsc SpanContext) context.Context {
|
|
return ContextWithSpanContext(parent, rsc.WithRemote(true))
|
|
}
|
|
|
|
// SpanFromContext returns the current Span from ctx.
|
|
//
|
|
// If no Span is currently set in ctx an implementation of a Span that
|
|
// performs no operations is returned.
|
|
func SpanFromContext(ctx context.Context) Span {
|
|
if ctx == nil {
|
|
return noopSpan{}
|
|
}
|
|
if span, ok := ctx.Value(currentSpanKey).(Span); ok {
|
|
return span
|
|
}
|
|
return noopSpan{}
|
|
}
|
|
|
|
// SpanContextFromContext returns the current Span's SpanContext.
|
|
func SpanContextFromContext(ctx context.Context) SpanContext {
|
|
return SpanFromContext(ctx).SpanContext()
|
|
}
|