mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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961121698b
* Move scope.Active to trace.CurrentSpan * Remove scope / does not build * Global tracer * Checkpoint * Checkpoint * Add key/key.go for key.New * Comments * Remove more EventID and ScopeID * Use Handle to describe static objects * TODOs * Remove empty file * Remove singletons * Update TODOs * TODO about map update * Make stats package option aliases (like key has) * Rename experimental/streaming * streaming SDK builds w/ many TODOs * Get the examples building * Tidy up metric API / add interface check * Remove logic from the registry; this is now a placeholder
37 lines
987 B
Go
37 lines
987 B
Go
// Copyright 2019, 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 trace
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import (
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"context"
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)
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type currentSpanKeyType struct{}
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var (
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currentSpanKey = ¤tSpanKeyType{}
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)
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func SetCurrentSpan(ctx context.Context, span Span) context.Context {
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return context.WithValue(ctx, currentSpanKey, span)
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}
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func CurrentSpan(ctx context.Context) Span {
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if span, has := ctx.Value(currentSpanKey).(Span); has {
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return span
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}
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return noopSpan{}
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}
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