@opentelemetry/sdk-metrics
Version:
30 lines • 1.12 kB
JavaScript
/*
* Copyright The OpenTelemetry Authors
* SPDX-License-Identifier: Apache-2.0
*/
import { FixedSizeExemplarReservoirBase } from './ExemplarReservoir';
/**
* AlignedHistogramBucketExemplarReservoir takes the same boundaries
* configuration of a Histogram. This algorithm keeps the last seen measurement
* that falls within a histogram bucket.
*/
export class AlignedHistogramBucketExemplarReservoir extends FixedSizeExemplarReservoirBase {
_boundaries;
constructor(boundaries) {
super(boundaries.length + 1);
this._boundaries = boundaries;
}
_findBucketIndex(value, _timestamp, _attributes, _ctx) {
for (let i = 0; i < this._boundaries.length; i++) {
if (value <= this._boundaries[i]) {
return i;
}
}
return this._boundaries.length;
}
offer(value, timestamp, attributes, ctx) {
const index = this._findBucketIndex(value, timestamp, attributes, ctx);
this._reservoirStorage[index].offer(value, timestamp, attributes, ctx);
}
}
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