91 lines
3.2 KiB
JavaScript
91 lines
3.2 KiB
JavaScript
/*
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* 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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* https://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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*/
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import { AggregatorKind, } from './types';
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import { DataPointType, } from '../export/MetricData';
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export class SumAccumulation {
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constructor(startTime, monotonic, _current = 0, reset = false) {
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this.startTime = startTime;
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this.monotonic = monotonic;
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this._current = _current;
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this.reset = reset;
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}
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record(value) {
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if (this.monotonic && value < 0) {
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return;
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}
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this._current += value;
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}
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setStartTime(startTime) {
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this.startTime = startTime;
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}
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toPointValue() {
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return this._current;
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}
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}
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/** Basic aggregator which calculates a Sum from individual measurements. */
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export class SumAggregator {
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constructor(monotonic) {
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this.monotonic = monotonic;
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this.kind = AggregatorKind.SUM;
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}
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createAccumulation(startTime) {
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return new SumAccumulation(startTime, this.monotonic);
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}
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/**
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* Returns the result of the merge of the given accumulations.
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*/
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merge(previous, delta) {
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const prevPv = previous.toPointValue();
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const deltaPv = delta.toPointValue();
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if (delta.reset) {
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return new SumAccumulation(delta.startTime, this.monotonic, deltaPv, delta.reset);
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}
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return new SumAccumulation(previous.startTime, this.monotonic, prevPv + deltaPv);
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}
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/**
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* Returns a new DELTA aggregation by comparing two cumulative measurements.
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*/
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diff(previous, current) {
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const prevPv = previous.toPointValue();
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const currPv = current.toPointValue();
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/**
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* If the SumAggregator is a monotonic one and the previous point value is
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* greater than the current one, a reset is deemed to be happened.
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* Return the current point value to prevent the value from been reset.
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*/
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if (this.monotonic && prevPv > currPv) {
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return new SumAccumulation(current.startTime, this.monotonic, currPv, true);
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}
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return new SumAccumulation(current.startTime, this.monotonic, currPv - prevPv);
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}
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toMetricData(descriptor, aggregationTemporality, accumulationByAttributes, endTime) {
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return {
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descriptor,
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aggregationTemporality,
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dataPointType: DataPointType.SUM,
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dataPoints: accumulationByAttributes.map(([attributes, accumulation]) => {
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return {
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attributes,
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startTime: accumulation.startTime,
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endTime,
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value: accumulation.toPointValue(),
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};
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}),
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isMonotonic: this.monotonic,
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};
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}
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}
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//# sourceMappingURL=Sum.js.map
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