/
LastValue.ts
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/
LastValue.ts
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/*
* 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 {
AggregatorKind,
LastValue,
LastValueAggregatorType,
Point,
} from '../types';
import { HrTime } from '@opentelemetry/api';
import { hrTime } from '@opentelemetry/core';
/** Basic aggregator for LastValue which keeps the last recorded value. */
export class LastValueAggregator implements LastValueAggregatorType {
private _current: number = 0;
private _lastUpdateTime: HrTime = [0, 0];
kind: AggregatorKind.LAST_VALUE = AggregatorKind.LAST_VALUE;
update(value: number): void {
this._current = value;
this._lastUpdateTime = hrTime();
}
toPoint(): Point<LastValue> {
return {
value: this._current,
timestamp: this._lastUpdateTime,
};
}
}