82 lines
2.5 KiB
Go
82 lines
2.5 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 processorhelper // import "go.opentelemetry.io/collector/processor/processorhelper"
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import (
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"context"
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"errors"
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"go.opentelemetry.io/otel/trace"
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"go.opentelemetry.io/collector/component"
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"go.opentelemetry.io/collector/component/componenterror"
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"go.opentelemetry.io/collector/config"
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"go.opentelemetry.io/collector/consumer"
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"go.opentelemetry.io/collector/model/pdata"
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)
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// ProcessMetricsFunc is a helper function that processes the incoming data and returns the data to be sent to the next component.
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// If error is returned then returned data are ignored. It MUST not call the next component.
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type ProcessMetricsFunc func(context.Context, pdata.Metrics) (pdata.Metrics, error)
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type metricsProcessor struct {
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component.StartFunc
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component.ShutdownFunc
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consumer.Metrics
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}
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// NewMetricsProcessor creates a MetricsProcessor that ensure context propagation and the right tags are set.
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// TODO: Add observability metrics support
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func NewMetricsProcessor(
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cfg config.Processor,
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nextConsumer consumer.Metrics,
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metricsFunc ProcessMetricsFunc,
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options ...Option,
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) (component.MetricsProcessor, error) {
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if metricsFunc == nil {
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return nil, errors.New("nil metricsFunc")
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}
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if nextConsumer == nil {
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return nil, componenterror.ErrNilNextConsumer
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}
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eventOptions := spanAttributes(cfg.ID())
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bs := fromOptions(options)
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metricsConsumer, err := consumer.NewMetrics(func(ctx context.Context, md pdata.Metrics) error {
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span := trace.SpanFromContext(ctx)
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span.AddEvent("Start processing.", eventOptions)
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var err error
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md, err = metricsFunc(ctx, md)
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span.AddEvent("End processing.", eventOptions)
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if err != nil {
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if errors.Is(err, ErrSkipProcessingData) {
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return nil
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}
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return err
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}
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return nextConsumer.ConsumeMetrics(ctx, md)
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}, bs.consumerOptions...)
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if err != nil {
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return nil, err
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}
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return &metricsProcessor{
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StartFunc: bs.StartFunc,
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ShutdownFunc: bs.ShutdownFunc,
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Metrics: metricsConsumer,
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}, nil
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}
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