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43 lines
1.6 KiB
Go
43 lines
1.6 KiB
Go
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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package otel // import "go.opentelemetry.io/otel"
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import (
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"go.opentelemetry.io/otel/internal/global"
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"go.opentelemetry.io/otel/metric"
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)
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// Meter returns a Meter from the global MeterProvider. The name must be the
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// name of the library providing instrumentation. This name may be the same as
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// the instrumented code only if that code provides built-in instrumentation.
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// If the name is empty, then a implementation defined default name will be
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// used instead.
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//
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// If this is called before a global MeterProvider is registered the returned
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// Meter will be a No-op implementation of a Meter. When a global MeterProvider
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// is registered for the first time, the returned Meter, and all the
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// instruments it has created or will create, are recreated automatically from
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// the new MeterProvider.
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//
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// This is short for GetMeterProvider().Meter(name).
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func Meter(name string, opts ...metric.MeterOption) metric.Meter {
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return GetMeterProvider().Meter(name, opts...)
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}
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// GetMeterProvider returns the registered global meter provider.
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//
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// If no global GetMeterProvider has been registered, a No-op GetMeterProvider
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// implementation is returned. When a global GetMeterProvider is registered for
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// the first time, the returned GetMeterProvider, and all the Meters it has
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// created or will create, are recreated automatically from the new
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// GetMeterProvider.
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func GetMeterProvider() metric.MeterProvider {
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return global.MeterProvider()
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}
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// SetMeterProvider registers mp as the global MeterProvider.
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func SetMeterProvider(mp metric.MeterProvider) {
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global.SetMeterProvider(mp)
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}
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