-
Notifications
You must be signed in to change notification settings - Fork 564
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Signed-off-by: Ziqi Zhao <zhaoziqi9146@gmail.com>
- Loading branch information
1 parent
0eb6a97
commit 14e51e4
Showing
3 changed files
with
87 additions
and
66 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
81 changes: 81 additions & 0 deletions
81
instrumentation/google.golang.org/grpc/otelgrpc/metadata_supplier.go
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| // 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 otelgrpc // import "go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc" | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "go.opentelemetry.io/otel/baggage" | ||
| "go.opentelemetry.io/otel/propagation" | ||
| "go.opentelemetry.io/otel/trace" | ||
| "google.golang.org/grpc/metadata" | ||
| ) | ||
|
|
||
| type metadataSupplier struct { | ||
| metadata *metadata.MD | ||
| } | ||
|
|
||
| // assert that metadataSupplier implements the TextMapCarrier interface. | ||
| var _ propagation.TextMapCarrier = &metadataSupplier{} | ||
|
|
||
| func (s *metadataSupplier) Get(key string) string { | ||
| values := s.metadata.Get(key) | ||
| if len(values) == 0 { | ||
| return "" | ||
| } | ||
| return values[0] | ||
| } | ||
|
|
||
| func (s *metadataSupplier) Set(key string, value string) { | ||
| s.metadata.Set(key, value) | ||
| } | ||
|
|
||
| func (s *metadataSupplier) Keys() []string { | ||
| out := make([]string, 0, len(*s.metadata)) | ||
| for key := range *s.metadata { | ||
| out = append(out, key) | ||
| } | ||
| return out | ||
| } | ||
|
|
||
| // Inject injects correlation context and span context into the gRPC | ||
| // metadata object. This function is meant to be used on outgoing | ||
| // requests. | ||
| func Inject(ctx context.Context, md *metadata.MD, opts ...Option) { | ||
| c := newConfig(opts) | ||
| inject(ctx, md, c.Propagators) | ||
| } | ||
|
|
||
| func inject(ctx context.Context, md *metadata.MD, propagators propagation.TextMapPropagator) { | ||
| propagators.Inject(ctx, &metadataSupplier{ | ||
| metadata: md, | ||
| }) | ||
| } | ||
|
|
||
| // Extract returns the correlation context and span context that | ||
| // another service encoded in the gRPC metadata object with Inject. | ||
| // This function is meant to be used on incoming requests. | ||
| func Extract(ctx context.Context, md *metadata.MD, opts ...Option) (baggage.Baggage, trace.SpanContext) { | ||
| c := newConfig(opts) | ||
| return extract(ctx, md, c.Propagators) | ||
| } | ||
|
|
||
| func extract(ctx context.Context, md *metadata.MD, propagators propagation.TextMapPropagator) (baggage.Baggage, trace.SpanContext) { | ||
| ctx = propagators.Extract(ctx, &metadataSupplier{ | ||
| metadata: md, | ||
| }) | ||
|
|
||
| return baggage.FromContext(ctx), trace.SpanContextFromContext(ctx) | ||
| } |