mirror of
https://github.com/rocky-linux/peridot.git
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99 lines
2.8 KiB
Go
99 lines
2.8 KiB
Go
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// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package otelgrpc // import "go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
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import (
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"context"
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"google.golang.org/grpc/metadata"
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"go.opentelemetry.io/otel/baggage"
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"go.opentelemetry.io/otel/propagation"
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"go.opentelemetry.io/otel/trace"
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)
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type metadataSupplier struct {
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metadata *metadata.MD
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}
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// assert that metadataSupplier implements the TextMapCarrier interface.
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var _ propagation.TextMapCarrier = &metadataSupplier{}
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func (s *metadataSupplier) Get(key string) string {
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values := s.metadata.Get(key)
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if len(values) == 0 {
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return ""
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}
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return values[0]
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}
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func (s *metadataSupplier) Set(key string, value string) {
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s.metadata.Set(key, value)
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}
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func (s *metadataSupplier) Keys() []string {
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out := make([]string, 0, len(*s.metadata))
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for key := range *s.metadata {
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out = append(out, key)
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}
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return out
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}
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// Inject injects correlation context and span context into the gRPC
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// metadata object. This function is meant to be used on outgoing
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// requests.
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// Deprecated: Unnecessary public func.
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func Inject(ctx context.Context, md *metadata.MD, opts ...Option) {
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c := newConfig(opts, "")
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c.Propagators.Inject(ctx, &metadataSupplier{
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metadata: md,
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})
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}
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func inject(ctx context.Context, propagators propagation.TextMapPropagator) context.Context {
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md, ok := metadata.FromOutgoingContext(ctx)
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if !ok {
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md = metadata.MD{}
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}
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propagators.Inject(ctx, &metadataSupplier{
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metadata: &md,
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})
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return metadata.NewOutgoingContext(ctx, md)
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}
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// Extract returns the correlation context and span context that
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// another service encoded in the gRPC metadata object with Inject.
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// This function is meant to be used on incoming requests.
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// Deprecated: Unnecessary public func.
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func Extract(ctx context.Context, md *metadata.MD, opts ...Option) (baggage.Baggage, trace.SpanContext) {
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c := newConfig(opts, "")
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ctx = c.Propagators.Extract(ctx, &metadataSupplier{
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metadata: md,
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})
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return baggage.FromContext(ctx), trace.SpanContextFromContext(ctx)
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}
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func extract(ctx context.Context, propagators propagation.TextMapPropagator) context.Context {
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md, ok := metadata.FromIncomingContext(ctx)
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if !ok {
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md = metadata.MD{}
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}
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return propagators.Extract(ctx, &metadataSupplier{
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metadata: &md,
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})
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}
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