94 lines
4.8 KiB
JavaScript
94 lines
4.8 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 { hashAttributes } from '../utils';
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import { AttributeHashMap } from './HashMap';
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/**
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* Internal interface.
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*
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* Allows synchronous collection of metrics. This processor should allow
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* allocation of new aggregation cells for metrics and convert cumulative
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* recording to delta data points.
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*/
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export class DeltaMetricProcessor {
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constructor(_aggregator, aggregationCardinalityLimit) {
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this._aggregator = _aggregator;
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this._activeCollectionStorage = new AttributeHashMap();
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// TODO: find a reasonable mean to clean the memo;
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// https://github.com/open-telemetry/opentelemetry-specification/pull/2208
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this._cumulativeMemoStorage = new AttributeHashMap();
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this._overflowAttributes = { 'otel.metric.overflow': true };
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this._cardinalityLimit = (aggregationCardinalityLimit !== null && aggregationCardinalityLimit !== void 0 ? aggregationCardinalityLimit : 2000) - 1;
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this._overflowHashCode = hashAttributes(this._overflowAttributes);
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}
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record(value, attributes, _context, collectionTime) {
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let accumulation = this._activeCollectionStorage.get(attributes);
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if (!accumulation) {
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if (this._activeCollectionStorage.size >= this._cardinalityLimit) {
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const overflowAccumulation = this._activeCollectionStorage.getOrDefault(this._overflowAttributes, () => this._aggregator.createAccumulation(collectionTime));
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overflowAccumulation === null || overflowAccumulation === void 0 ? void 0 : overflowAccumulation.record(value);
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return;
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}
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accumulation = this._aggregator.createAccumulation(collectionTime);
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this._activeCollectionStorage.set(attributes, accumulation);
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}
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accumulation === null || accumulation === void 0 ? void 0 : accumulation.record(value);
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}
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batchCumulate(measurements, collectionTime) {
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Array.from(measurements.entries()).forEach(([attributes, value, hashCode]) => {
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const accumulation = this._aggregator.createAccumulation(collectionTime);
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accumulation === null || accumulation === void 0 ? void 0 : accumulation.record(value);
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let delta = accumulation;
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// Diff with recorded cumulative memo.
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if (this._cumulativeMemoStorage.has(attributes, hashCode)) {
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// has() returned true, previous is present.
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// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
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const previous = this._cumulativeMemoStorage.get(attributes, hashCode);
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delta = this._aggregator.diff(previous, accumulation);
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}
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else {
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// If the cardinality limit is reached, we need to change the attributes
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if (this._cumulativeMemoStorage.size >= this._cardinalityLimit) {
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attributes = this._overflowAttributes;
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hashCode = this._overflowHashCode;
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if (this._cumulativeMemoStorage.has(attributes, hashCode)) {
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const previous = this._cumulativeMemoStorage.get(attributes, hashCode);
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delta = this._aggregator.diff(previous, accumulation);
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}
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}
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}
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// Merge with uncollected active delta.
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if (this._activeCollectionStorage.has(attributes, hashCode)) {
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// has() returned true, previous is present.
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// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
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const active = this._activeCollectionStorage.get(attributes, hashCode);
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delta = this._aggregator.merge(active, delta);
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}
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// Save the current record and the delta record.
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this._cumulativeMemoStorage.set(attributes, accumulation, hashCode);
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this._activeCollectionStorage.set(attributes, delta, hashCode);
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});
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}
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/**
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* Returns a collection of delta metrics. Start time is the when first
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* time event collected.
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*/
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collect() {
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const unreportedDelta = this._activeCollectionStorage;
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this._activeCollectionStorage = new AttributeHashMap();
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return unreportedDelta;
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}
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}
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//# sourceMappingURL=DeltaMetricProcessor.js.map
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