50 lines
2.2 KiB
Go
50 lines
2.2 KiB
Go
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// Copyright The 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 // import "go.opentelemetry.io/otel/metric/global"
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import (
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"go.opentelemetry.io/otel/metric"
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"go.opentelemetry.io/otel/metric/internal/global"
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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(instrumentationName string, opts ...metric.MeterOption) metric.Meter {
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return MeterProvider().Meter(instrumentationName, opts...)
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}
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// MeterProvider returns the registered global meter provider.
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//
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// If no global MeterProvider has been registered, a No-op MeterProvider implementation is returned. When a global MeterProvider is registered for the first time, the returned MeterProvider, and all the Meters it has created or will create, are recreated automatically from the new MeterProvider.
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func MeterProvider() 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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