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https://github.com/open-telemetry/opentelemetry-go.git
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a485d0ec64
* Update License header for all source files - Add Apache 2.0 header to source files that did not have one. - Update all existing headers dated to 2019 to be 2020 - Remove comma from License header to comply with the Apache 2.0 guidelines. * Update Copyright notice Use the standard Copyright notices outlined by the [CNCF](https://github.com/cncf/foundation/blob/master/copyright-notices.md#copyright-notices)
101 lines
3.2 KiB
Go
101 lines
3.2 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 simple // import "go.opentelemetry.io/otel/sdk/metric/selector/simple"
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import (
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"go.opentelemetry.io/otel/api/metric"
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export "go.opentelemetry.io/otel/sdk/export/metric"
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"go.opentelemetry.io/otel/sdk/metric/aggregator/array"
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"go.opentelemetry.io/otel/sdk/metric/aggregator/ddsketch"
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"go.opentelemetry.io/otel/sdk/metric/aggregator/minmaxsumcount"
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"go.opentelemetry.io/otel/sdk/metric/aggregator/sum"
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)
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type (
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selectorInexpensive struct{}
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selectorExact struct{}
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selectorSketch struct {
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config *ddsketch.Config
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}
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)
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var (
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_ export.AggregationSelector = selectorInexpensive{}
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_ export.AggregationSelector = selectorSketch{}
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_ export.AggregationSelector = selectorExact{}
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)
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// NewWithInexpensiveMeasure returns a simple aggregation selector
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// that uses counter, minmaxsumcount and minmaxsumcount aggregators
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// for the three kinds of metric. This selector is faster and uses
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// less memory than the others because minmaxsumcount does not
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// aggregate quantile information.
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func NewWithInexpensiveMeasure() export.AggregationSelector {
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return selectorInexpensive{}
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}
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// NewWithSketchMeasure returns a simple aggregation selector that
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// uses counter, ddsketch, and ddsketch aggregators for the three
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// kinds of metric. This selector uses more cpu and memory than the
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// NewWithInexpensiveMeasure because it uses one DDSketch per distinct
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// measure/observer and labelset.
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func NewWithSketchMeasure(config *ddsketch.Config) export.AggregationSelector {
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return selectorSketch{
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config: config,
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}
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}
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// NewWithExactMeasure returns a simple aggregation selector that uses
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// counter, array, and array aggregators for the three kinds of metric.
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// This selector uses more memory than the NewWithSketchMeasure
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// because it aggregates an array of all values, therefore is able to
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// compute exact quantiles.
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func NewWithExactMeasure() export.AggregationSelector {
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return selectorExact{}
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}
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func (selectorInexpensive) AggregatorFor(descriptor *metric.Descriptor) export.Aggregator {
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switch descriptor.MetricKind() {
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case metric.ObserverKind:
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fallthrough
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case metric.MeasureKind:
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return minmaxsumcount.New(descriptor)
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default:
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return sum.New()
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}
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}
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func (s selectorSketch) AggregatorFor(descriptor *metric.Descriptor) export.Aggregator {
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switch descriptor.MetricKind() {
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case metric.ObserverKind:
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fallthrough
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case metric.MeasureKind:
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return ddsketch.New(s.config, descriptor)
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default:
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return sum.New()
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}
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}
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func (selectorExact) AggregatorFor(descriptor *metric.Descriptor) export.Aggregator {
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switch descriptor.MetricKind() {
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case metric.ObserverKind:
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fallthrough
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case metric.MeasureKind:
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return array.New()
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default:
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return sum.New()
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}
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}
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