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https://github.com/open-telemetry/opentelemetry-go.git
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37 lines
1.2 KiB
Go
37 lines
1.2 KiB
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 "sync/atomic"
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// The process global tracer could have process-wide resource
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// tags applied directly, or we can have a SetGlobal tracer to
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// install a default tracer w/ resources.
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var global atomic.Value
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// GlobalTracer return tracer registered with global registry.
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// If no tracer is registered then an instance of noop Tracer is returned.
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func GlobalTracer() Tracer {
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if t := global.Load(); t != nil {
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return t.(Tracer)
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}
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return NoopTracer{}
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}
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// SetGlobalTracer sets provided tracer as a global tracer.
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func SetGlobalTracer(t Tracer) {
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global.Store(t)
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}
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