@opentelemetry/exporter-metrics-otlp-http
Version:
OpenTelemetry Collector Metrics Exporter allows user to send collected metrics to the OpenTelemetry Collector
97 lines • 4.19 kB
JavaScript
/*
* Copyright The OpenTelemetry Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { getStringFromEnv } from '@opentelemetry/core';
import { AggregationTemporality, InstrumentType, AggregationType, } from '@opentelemetry/sdk-metrics';
import { AggregationTemporalityPreference, } from './OTLPMetricExporterOptions';
import { OTLPExporterBase, } from '@opentelemetry/otlp-exporter-base';
import { diag } from '@opentelemetry/api';
export const CumulativeTemporalitySelector = () => AggregationTemporality.CUMULATIVE;
export const DeltaTemporalitySelector = (instrumentType) => {
switch (instrumentType) {
case InstrumentType.COUNTER:
case InstrumentType.OBSERVABLE_COUNTER:
case InstrumentType.GAUGE:
case InstrumentType.HISTOGRAM:
case InstrumentType.OBSERVABLE_GAUGE:
return AggregationTemporality.DELTA;
case InstrumentType.UP_DOWN_COUNTER:
case InstrumentType.OBSERVABLE_UP_DOWN_COUNTER:
return AggregationTemporality.CUMULATIVE;
}
};
export const LowMemoryTemporalitySelector = (instrumentType) => {
switch (instrumentType) {
case InstrumentType.COUNTER:
case InstrumentType.HISTOGRAM:
return AggregationTemporality.DELTA;
case InstrumentType.GAUGE:
case InstrumentType.UP_DOWN_COUNTER:
case InstrumentType.OBSERVABLE_UP_DOWN_COUNTER:
case InstrumentType.OBSERVABLE_COUNTER:
case InstrumentType.OBSERVABLE_GAUGE:
return AggregationTemporality.CUMULATIVE;
}
};
function chooseTemporalitySelectorFromEnvironment() {
const configuredTemporality = (getStringFromEnv('OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE') ??
'cumulative').toLowerCase();
if (configuredTemporality === 'cumulative') {
return CumulativeTemporalitySelector;
}
if (configuredTemporality === 'delta') {
return DeltaTemporalitySelector;
}
if (configuredTemporality === 'lowmemory') {
return LowMemoryTemporalitySelector;
}
diag.warn(`OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE is set to '${configuredTemporality}', but only 'cumulative' and 'delta' are allowed. Using default ('cumulative') instead.`);
return CumulativeTemporalitySelector;
}
function chooseTemporalitySelector(temporalityPreference) {
// Directly passed preference has priority.
if (temporalityPreference != null) {
if (temporalityPreference === AggregationTemporalityPreference.DELTA) {
return DeltaTemporalitySelector;
}
else if (temporalityPreference === AggregationTemporalityPreference.LOWMEMORY) {
return LowMemoryTemporalitySelector;
}
return CumulativeTemporalitySelector;
}
return chooseTemporalitySelectorFromEnvironment();
}
const DEFAULT_AGGREGATION = Object.freeze({
type: AggregationType.DEFAULT,
});
function chooseAggregationSelector(config) {
return config?.aggregationPreference ?? (() => DEFAULT_AGGREGATION);
}
export class OTLPMetricExporterBase extends OTLPExporterBase {
_aggregationTemporalitySelector;
_aggregationSelector;
constructor(delegate, config) {
super(delegate);
this._aggregationSelector = chooseAggregationSelector(config);
this._aggregationTemporalitySelector = chooseTemporalitySelector(config?.temporalityPreference);
}
selectAggregation(instrumentType) {
return this._aggregationSelector(instrumentType);
}
selectAggregationTemporality(instrumentType) {
return this._aggregationTemporalitySelector(instrumentType);
}
}
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