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https://github.com/open-telemetry/opentelemetry-go.git
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ecf65d7968
* Rename otel/label -> otel/attr Leave the imported name alone, to avoid a large diff and conflicts * Better import comment * Update CHANGELOG.md Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com> * otel/attr -> otel/attribute * Missed the changelog entry * Get rid of import renaming * Merge remaining conflicts Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com> Co-authored-by: Anthony Mirabella <a9@aneurysm9.com>
68 lines
2.0 KiB
Go
68 lines
2.0 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 reducer // import "go.opentelemetry.io/otel/sdk/metric/processor/reducer"
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import (
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/metric"
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export "go.opentelemetry.io/otel/sdk/export/metric"
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)
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type (
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// Processor implements "dimensionality reduction" by
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// filtering keys from export label sets.
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Processor struct {
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export.Checkpointer
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filterSelector LabelFilterSelector
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}
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// LabelFilterSelector is the interface used to configure a
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// specific Filter to an instrument.
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LabelFilterSelector interface {
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LabelFilterFor(descriptor *metric.Descriptor) attribute.Filter
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}
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)
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var _ export.Processor = &Processor{}
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var _ export.Checkpointer = &Processor{}
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// New returns a dimensionality-reducing Processor that passes data to
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// the next stage in an export pipeline.
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func New(filterSelector LabelFilterSelector, ckpter export.Checkpointer) *Processor {
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return &Processor{
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Checkpointer: ckpter,
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filterSelector: filterSelector,
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}
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}
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// Process implements export.Processor.
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func (p *Processor) Process(accum export.Accumulation) error {
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// Note: the removed labels are returned and ignored here.
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// Conceivably these inputs could be useful to a sampler.
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reduced, _ := accum.Labels().Filter(
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p.filterSelector.LabelFilterFor(
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accum.Descriptor(),
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),
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)
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return p.Checkpointer.Process(
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export.NewAccumulation(
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accum.Descriptor(),
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&reduced,
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accum.Resource(),
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accum.Aggregator(),
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),
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)
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}
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