diff options
Diffstat (limited to 'vendor/go.opentelemetry.io/otel/internal/global/propagator.go')
-rw-r--r-- | vendor/go.opentelemetry.io/otel/internal/global/propagator.go | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/vendor/go.opentelemetry.io/otel/internal/global/propagator.go b/vendor/go.opentelemetry.io/otel/internal/global/propagator.go deleted file mode 100644 index 1c8b8589b0..0000000000 --- a/vendor/go.opentelemetry.io/otel/internal/global/propagator.go +++ /dev/null @@ -1,82 +0,0 @@ -// 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 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() -} |