mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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15bfc5bb12
Also fixes example module paths so that they use the vanity URL instead of the github URL. [Closes #184]
70 lines
2.0 KiB
Go
70 lines
2.0 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 global
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import (
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"sync/atomic"
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"go.opentelemetry.io/otel/api/metric"
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"go.opentelemetry.io/otel/api/trace"
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)
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type (
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traceProvider struct {
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tp trace.Provider
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}
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meterProvider struct {
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mp metric.Provider
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}
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)
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var (
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globalTracer atomic.Value
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globalMeter atomic.Value
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)
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// TraceProvider returns the registered global trace provider.
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// If none is registered then an instance of trace.NoopProvider is returned.
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// Use the trace provider to create a named tracer. E.g.
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// tracer := global.TraceProvider().GetTracer("example.com/foo")
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func TraceProvider() trace.Provider {
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if gp := globalTracer.Load(); gp != nil {
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return gp.(traceProvider).tp
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}
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return trace.NoopProvider{}
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}
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// SetTraceProvider registers `tp` as the global trace provider.
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func SetTraceProvider(tp trace.Provider) {
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globalTracer.Store(traceProvider{tp: tp})
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}
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// MeterProvider returns the registered global meter provider.
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// If none is registered then an instance of metric.NoopProvider is returned.
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// Use the trace provider to create a named meter. E.g.
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// meter := global.MeterProvider().GetMeter("example.com/foo")
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func MeterProvider() metric.Provider {
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if gp := globalMeter.Load(); gp != nil {
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return gp.(meterProvider).mp
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}
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return metric.NoopProvider{}
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}
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// SetMeterProvider registers `mp` as the global meter provider.
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func SetMeterProvider(mp metric.Provider) {
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globalMeter.Store(meterProvider{mp: mp})
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}
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