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opentelemetry-go/baggage/baggage.go
Punya Biswal ecf65d7968
Rename otel/label -> otel/attribute (#1541)
* Rename otel/label -> otel/attr

Leave the imported name alone, to avoid a large diff and conflicts

* Better import comment

* Update CHANGELOG.md

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>

* otel/attr -> otel/attribute

* Missed the changelog entry

* Get rid of import renaming

* Merge remaining conflicts

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
Co-authored-by: Anthony Mirabella <a9@aneurysm9.com>
2021-02-18 12:59:37 -05:00

68 lines
2.4 KiB
Go

// 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 baggage // import "go.opentelemetry.io/otel/baggage"
import (
"context"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/internal/baggage"
)
// Set returns a copy of the set of baggage key-values in ctx.
func Set(ctx context.Context) attribute.Set {
// TODO (MrAlias, #1222): The underlying storage, the Map, shares many of
// the functional elements of the attribute.Set. These should be unified so
// this conversion is unnecessary and there is no performance hit calling
// this.
m := baggage.MapFromContext(ctx)
values := make([]attribute.KeyValue, 0, m.Len())
m.Foreach(func(kv attribute.KeyValue) bool {
values = append(values, kv)
return true
})
return attribute.NewSet(values...)
}
// Value returns the value related to key in the baggage of ctx. If no
// value is set, the returned attribute.Value will be an uninitialized zero-value
// with type INVALID.
func Value(ctx context.Context, key attribute.Key) attribute.Value {
v, _ := baggage.MapFromContext(ctx).Value(key)
return v
}
// ContextWithValues returns a copy of parent with pairs updated in the baggage.
func ContextWithValues(parent context.Context, pairs ...attribute.KeyValue) context.Context {
m := baggage.MapFromContext(parent).Apply(baggage.MapUpdate{
MultiKV: pairs,
})
return baggage.ContextWithMap(parent, m)
}
// ContextWithoutValues returns a copy of parent in which the values related
// to keys have been removed from the baggage.
func ContextWithoutValues(parent context.Context, keys ...attribute.Key) context.Context {
m := baggage.MapFromContext(parent).Apply(baggage.MapUpdate{
DropMultiK: keys,
})
return baggage.ContextWithMap(parent, m)
}
// ContextWithEmpty returns a copy of parent without baggage.
func ContextWithEmpty(parent context.Context) context.Context {
return baggage.ContextWithNoCorrelationData(parent)
}