mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2025-01-18 03:22:12 +02:00
65 lines
2.1 KiB
Go
65 lines
2.1 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 opencensus // import "go.opentelemetry.io/otel/bridge/opencensus"
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import (
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"context"
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ocmetricdata "go.opencensus.io/metric/metricdata"
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"go.opencensus.io/metric/metricproducer"
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internal "go.opentelemetry.io/otel/bridge/opencensus/internal/ocmetric"
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"go.opentelemetry.io/otel/sdk/instrumentation"
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"go.opentelemetry.io/otel/sdk/metric"
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"go.opentelemetry.io/otel/sdk/metric/metricdata"
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)
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// MetricProducer implements the [go.opentelemetry.io/otel/sdk/metric.Producer] to provide metrics
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// from OpenCensus to the OpenTelemetry SDK.
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type MetricProducer struct {
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manager *metricproducer.Manager
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}
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// NewMetricProducer returns a metric.Producer that fetches metrics from
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// OpenCensus.
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func NewMetricProducer(opts ...MetricOption) *MetricProducer {
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return &MetricProducer{
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manager: metricproducer.GlobalManager(),
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}
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}
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var _ metric.Producer = (*MetricProducer)(nil)
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// Produce fetches metrics from the OpenCensus manager,
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// translates them to OpenTelemetry's data model, and returns them.
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func (p *MetricProducer) Produce(context.Context) ([]metricdata.ScopeMetrics, error) {
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producers := p.manager.GetAll()
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data := []*ocmetricdata.Metric{}
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for _, ocProducer := range producers {
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data = append(data, ocProducer.Read()...)
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}
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otelmetrics, err := internal.ConvertMetrics(data)
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if len(otelmetrics) == 0 {
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return nil, err
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}
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return []metricdata.ScopeMetrics{{
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Scope: instrumentation.Scope{
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Name: scopeName,
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Version: Version(),
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},
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Metrics: otelmetrics,
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}}, err
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}
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