mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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aca054b075
* Add views field to pipeline Redundant maps tracking readers to views and readers to pipelines exist in the pipelineRegistry. Unify these maps by tracing views in pipelines. * Rename newPipelineRegistries->newPipelineRegistry * Add Reader as field to pipeline * Replace createAggregators with resolver facilitator * Replace create agg funcs with inserter facilitator * Correct documentation * Replace pipelineRegistry with []pipeline type * Rename newPipelineRegistry->newPipelines * Fix pipeline_registry_test * Flatten isMonotonic into only use * Update FIXME into TODO * Rename instrument provider resolver field to resolve * Fix comment English * Fix drop aggregator detection
118 lines
3.6 KiB
Go
118 lines
3.6 KiB
Go
// 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 metric // import "go.opentelemetry.io/otel/sdk/metric"
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import (
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"context"
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"sync"
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"go.opentelemetry.io/otel/metric"
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"go.opentelemetry.io/otel/metric/instrument"
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"go.opentelemetry.io/otel/metric/instrument/asyncfloat64"
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"go.opentelemetry.io/otel/metric/instrument/asyncint64"
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"go.opentelemetry.io/otel/metric/instrument/syncfloat64"
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"go.opentelemetry.io/otel/metric/instrument/syncint64"
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"go.opentelemetry.io/otel/sdk/instrumentation"
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)
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// meterRegistry keeps a record of initialized meters for instrumentation
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// scopes. A meter is unique to an instrumentation scope and if multiple
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// requests for that meter are made a meterRegistry ensure the same instance
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// is used.
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//
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// The zero meterRegistry is empty and ready for use.
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//
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// A meterRegistry must not be copied after first use.
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//
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// All methods of a meterRegistry are safe to call concurrently.
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type meterRegistry struct {
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sync.Mutex
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meters map[instrumentation.Scope]*meter
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pipes pipelines
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}
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// Get returns a registered meter matching the instrumentation scope if it
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// exists in the meterRegistry. Otherwise, a new meter configured for the
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// instrumentation scope is registered and then returned.
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//
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// Get is safe to call concurrently.
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func (r *meterRegistry) Get(s instrumentation.Scope) *meter {
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r.Lock()
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defer r.Unlock()
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if r.meters == nil {
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m := &meter{
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Scope: s,
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pipes: r.pipes,
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}
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r.meters = map[instrumentation.Scope]*meter{s: m}
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return m
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}
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m, ok := r.meters[s]
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if ok {
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return m
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}
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m = &meter{
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Scope: s,
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pipes: r.pipes,
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}
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r.meters[s] = m
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return m
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}
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// meter handles the creation and coordination of all metric instruments. A
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// meter represents a single instrumentation scope; all metric telemetry
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// produced by an instrumentation scope will use metric instruments from a
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// single meter.
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type meter struct {
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instrumentation.Scope
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pipes pipelines
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}
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// Compile-time check meter implements metric.Meter.
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var _ metric.Meter = (*meter)(nil)
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// AsyncInt64 returns the asynchronous integer instrument provider.
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func (m *meter) AsyncInt64() asyncint64.InstrumentProvider {
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return asyncInt64Provider{scope: m.Scope, resolve: newResolver[int64](m.pipes)}
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}
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// AsyncFloat64 returns the asynchronous floating-point instrument provider.
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func (m *meter) AsyncFloat64() asyncfloat64.InstrumentProvider {
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return asyncFloat64Provider{scope: m.Scope, resolve: newResolver[float64](m.pipes)}
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}
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// RegisterCallback registers the function f to be called when any of the
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// insts Collect method is called.
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func (m *meter) RegisterCallback(insts []instrument.Asynchronous, f func(context.Context)) error {
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m.pipes.registerCallback(f)
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return nil
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}
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// SyncInt64 returns the synchronous integer instrument provider.
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func (m *meter) SyncInt64() syncint64.InstrumentProvider {
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return syncInt64Provider{scope: m.Scope, resolve: newResolver[int64](m.pipes)}
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}
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// SyncFloat64 returns the synchronous floating-point instrument provider.
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func (m *meter) SyncFloat64() syncfloat64.InstrumentProvider {
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return syncFloat64Provider{scope: m.Scope, resolve: newResolver[float64](m.pipes)}
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}
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