gotosocial/vendor/go.opentelemetry.io/otel/internal/global/propagator.go
dependabot[bot] c097745c38
[chore]: Bump go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc (#2818)
Bumps [go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc](https://github.com/open-telemetry/opentelemetry-go) from 1.24.0 to 1.25.0.
- [Release notes](https://github.com/open-telemetry/opentelemetry-go/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-go/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-go/compare/v1.24.0...v1.25.0)

---
updated-dependencies:
- dependency-name: go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
2024-04-11 11:46:18 +02:00

71 lines
2.2 KiB
Go

// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package global // import "go.opentelemetry.io/otel/internal/global"
import (
"context"
"sync"
"go.opentelemetry.io/otel/propagation"
)
// textMapPropagator is a default TextMapPropagator that delegates calls to a
// registered delegate if one is set, otherwise it defaults to delegating the
// calls to a the default no-op propagation.TextMapPropagator.
type textMapPropagator struct {
mtx sync.Mutex
once sync.Once
delegate propagation.TextMapPropagator
noop propagation.TextMapPropagator
}
// Compile-time guarantee that textMapPropagator implements the
// propagation.TextMapPropagator interface.
var _ propagation.TextMapPropagator = (*textMapPropagator)(nil)
func newTextMapPropagator() *textMapPropagator {
return &textMapPropagator{
noop: propagation.NewCompositeTextMapPropagator(),
}
}
// SetDelegate sets a delegate propagation.TextMapPropagator that all calls are
// forwarded to. Delegation can only be performed once, all subsequent calls
// perform no delegation.
func (p *textMapPropagator) SetDelegate(delegate propagation.TextMapPropagator) {
if delegate == nil {
return
}
p.mtx.Lock()
p.once.Do(func() { p.delegate = delegate })
p.mtx.Unlock()
}
// effectiveDelegate returns the current delegate of p if one is set,
// otherwise the default noop TextMapPropagator is returned. This method
// can be called concurrently.
func (p *textMapPropagator) effectiveDelegate() propagation.TextMapPropagator {
p.mtx.Lock()
defer p.mtx.Unlock()
if p.delegate != nil {
return p.delegate
}
return p.noop
}
// Inject set cross-cutting concerns from the Context into the carrier.
func (p *textMapPropagator) Inject(ctx context.Context, carrier propagation.TextMapCarrier) {
p.effectiveDelegate().Inject(ctx, carrier)
}
// Extract reads cross-cutting concerns from the carrier into a Context.
func (p *textMapPropagator) Extract(ctx context.Context, carrier propagation.TextMapCarrier) context.Context {
return p.effectiveDelegate().Extract(ctx, carrier)
}
// Fields returns the keys whose values are set with Inject.
func (p *textMapPropagator) Fields() []string {
return p.effectiveDelegate().Fields()
}