@opentelemetry/sdk-metrics
Version:
66 lines • 2.99 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.
*/
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
if (typeof b !== "function" && b !== null)
throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
import { FixedSizeExemplarReservoirBase } from './ExemplarReservoir';
/**
* Fixed size reservoir that uses equivalent of naive reservoir sampling
* algorithm to accept measurements.
*
*/
var SimpleFixedSizeExemplarReservoir = /** @class */ (function (_super) {
__extends(SimpleFixedSizeExemplarReservoir, _super);
function SimpleFixedSizeExemplarReservoir(size) {
var _this = _super.call(this, size) || this;
_this._numMeasurementsSeen = 0;
return _this;
}
SimpleFixedSizeExemplarReservoir.prototype.getRandomInt = function (min, max) {
//[min, max)
return Math.floor(Math.random() * (max - min) + min);
};
SimpleFixedSizeExemplarReservoir.prototype._findBucketIndex = function (_value, _timestamp, _attributes, _ctx) {
if (this._numMeasurementsSeen < this._size)
return this._numMeasurementsSeen++;
var index = this.getRandomInt(0, ++this._numMeasurementsSeen);
return index < this._size ? index : -1;
};
SimpleFixedSizeExemplarReservoir.prototype.offer = function (value, timestamp, attributes, ctx) {
var index = this._findBucketIndex(value, timestamp, attributes, ctx);
if (index !== -1) {
this._reservoirStorage[index].offer(value, timestamp, attributes, ctx);
}
};
SimpleFixedSizeExemplarReservoir.prototype.reset = function () {
this._numMeasurementsSeen = 0;
};
return SimpleFixedSizeExemplarReservoir;
}(FixedSizeExemplarReservoirBase));
export { SimpleFixedSizeExemplarReservoir };
//# sourceMappingURL=SimpleFixedSizeExemplarReservoir.js.map