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50 lines
1.9 KiB
50 lines
1.9 KiB
4 years ago
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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 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 creates an implementation of the Meter interface from the global
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// MeterProvider. The instrumentationName must be the name of the library
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// providing instrumentation. This name may be the same as the instrumented
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// code only if that code provides built-in instrumentation. If the
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// instrumentationName is empty, then a implementation defined default name
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// will be used instead.
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//
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// This is short for MeterProvider().Meter(name)
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func Meter(instrumentationName string, opts ...metric.MeterOption) metric.Meter {
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return GetMeterProvider().Meter(instrumentationName, opts...)
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}
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// GetMeterProvider returns the registered global meter provider. If
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// none is registered then a default meter provider is returned that
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// forwards the Meter interface to the first registered Meter.
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//
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// Use the meter provider to create a named meter. E.g.
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// meter := global.MeterProvider().Meter("example.com/foo")
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// or
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// meter := global.Meter("example.com/foo")
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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 meter provider.
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func SetMeterProvider(mp metric.MeterProvider) {
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global.SetMeterProvider(mp)
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}
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