diff options
Diffstat (limited to 'vendor/go.opentelemetry.io/otel/propagation/propagation.go')
-rw-r--r-- | vendor/go.opentelemetry.io/otel/propagation/propagation.go | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/vendor/go.opentelemetry.io/otel/propagation/propagation.go b/vendor/go.opentelemetry.io/otel/propagation/propagation.go deleted file mode 100644 index 8c8286aab..000000000 --- a/vendor/go.opentelemetry.io/otel/propagation/propagation.go +++ /dev/null @@ -1,142 +0,0 @@ -// Copyright The OpenTelemetry Authors -// SPDX-License-Identifier: Apache-2.0 - -package propagation // import "go.opentelemetry.io/otel/propagation" - -import ( - "context" - "net/http" -) - -// TextMapCarrier is the storage medium used by a TextMapPropagator. -type TextMapCarrier interface { - // DO NOT CHANGE: any modification will not be backwards compatible and - // must never be done outside of a new major release. - - // Get returns the value associated with the passed key. - Get(key string) string - // DO NOT CHANGE: any modification will not be backwards compatible and - // must never be done outside of a new major release. - - // Set stores the key-value pair. - Set(key string, value string) - // DO NOT CHANGE: any modification will not be backwards compatible and - // must never be done outside of a new major release. - - // Keys lists the keys stored in this carrier. - Keys() []string - // DO NOT CHANGE: any modification will not be backwards compatible and - // must never be done outside of a new major release. -} - -// MapCarrier is a TextMapCarrier that uses a map held in memory as a storage -// medium for propagated key-value pairs. -type MapCarrier map[string]string - -// Compile time check that MapCarrier implements the TextMapCarrier. -var _ TextMapCarrier = MapCarrier{} - -// Get returns the value associated with the passed key. -func (c MapCarrier) Get(key string) string { - return c[key] -} - -// Set stores the key-value pair. -func (c MapCarrier) Set(key, value string) { - c[key] = value -} - -// Keys lists the keys stored in this carrier. -func (c MapCarrier) Keys() []string { - keys := make([]string, 0, len(c)) - for k := range c { - keys = append(keys, k) - } - return keys -} - -// HeaderCarrier adapts http.Header to satisfy the TextMapCarrier interface. -type HeaderCarrier http.Header - -// Get returns the value associated with the passed key. -func (hc HeaderCarrier) Get(key string) string { - return http.Header(hc).Get(key) -} - -// Set stores the key-value pair. -func (hc HeaderCarrier) Set(key string, value string) { - http.Header(hc).Set(key, value) -} - -// Keys lists the keys stored in this carrier. -func (hc HeaderCarrier) Keys() []string { - keys := make([]string, 0, len(hc)) - for k := range hc { - keys = append(keys, k) - } - return keys -} - -// TextMapPropagator propagates cross-cutting concerns as key-value text -// pairs within a carrier that travels in-band across process boundaries. -type TextMapPropagator interface { - // DO NOT CHANGE: any modification will not be backwards compatible and - // must never be done outside of a new major release. - - // Inject set cross-cutting concerns from the Context into the carrier. - Inject(ctx context.Context, carrier TextMapCarrier) - // DO NOT CHANGE: any modification will not be backwards compatible and - // must never be done outside of a new major release. - - // Extract reads cross-cutting concerns from the carrier into a Context. - Extract(ctx context.Context, carrier TextMapCarrier) context.Context - // DO NOT CHANGE: any modification will not be backwards compatible and - // must never be done outside of a new major release. - - // Fields returns the keys whose values are set with Inject. - Fields() []string - // DO NOT CHANGE: any modification will not be backwards compatible and - // must never be done outside of a new major release. -} - -type compositeTextMapPropagator []TextMapPropagator - -func (p compositeTextMapPropagator) Inject(ctx context.Context, carrier TextMapCarrier) { - for _, i := range p { - i.Inject(ctx, carrier) - } -} - -func (p compositeTextMapPropagator) Extract(ctx context.Context, carrier TextMapCarrier) context.Context { - for _, i := range p { - ctx = i.Extract(ctx, carrier) - } - return ctx -} - -func (p compositeTextMapPropagator) Fields() []string { - unique := make(map[string]struct{}) - for _, i := range p { - for _, k := range i.Fields() { - unique[k] = struct{}{} - } - } - - fields := make([]string, 0, len(unique)) - for k := range unique { - fields = append(fields, k) - } - return fields -} - -// NewCompositeTextMapPropagator returns a unified TextMapPropagator from the -// group of passed TextMapPropagator. This allows different cross-cutting -// concerns to be propagates in a unified manner. -// -// The returned TextMapPropagator will inject and extract cross-cutting -// concerns in the order the TextMapPropagators were provided. Additionally, -// the Fields method will return a de-duplicated slice of the keys that are -// set with the Inject method. -func NewCompositeTextMapPropagator(p ...TextMapPropagator) TextMapPropagator { - return compositeTextMapPropagator(p) -} |