@opentelemetry/sdk-metrics
Version:
80 lines • 2.34 kB
JavaScript
/*
* Copyright The OpenTelemetry Authors
* SPDX-License-Identifier: Apache-2.0
*/
import { isSpanContextValid, trace } from '@opentelemetry/api';
class ExemplarBucket {
value = 0;
attributes = {};
timestamp = [0, 0];
spanId;
traceId;
_offered = false;
offer(value, timestamp, attributes, ctx) {
this.value = value;
this.timestamp = timestamp;
this.attributes = attributes;
const spanContext = trace.getSpanContext(ctx);
if (spanContext && isSpanContextValid(spanContext)) {
this.spanId = spanContext.spanId;
this.traceId = spanContext.traceId;
}
this._offered = true;
}
collect(pointAttributes) {
if (!this._offered)
return null;
const currentAttributes = this.attributes;
// filter attributes
for (const key in pointAttributes) {
if (Object.prototype.hasOwnProperty.call(pointAttributes, key) &&
pointAttributes[key] === currentAttributes[key]) {
delete currentAttributes[key];
}
}
const retVal = {
filteredAttributes: currentAttributes,
value: this.value,
timestamp: this.timestamp,
spanId: this.spanId,
traceId: this.traceId,
};
this.attributes = {};
this.value = 0;
this.timestamp = [0, 0];
this.spanId = undefined;
this.traceId = undefined;
this._offered = false;
return retVal;
}
}
export class FixedSizeExemplarReservoirBase {
_reservoirStorage;
_size;
constructor(size) {
this._size = size;
this._reservoirStorage = new Array(size);
for (let i = 0; i < this._size; i++) {
this._reservoirStorage[i] = new ExemplarBucket();
}
}
maxSize() {
return this._size;
}
/**
* Resets the reservoir
*/
reset() { }
collect(pointAttributes) {
const exemplars = [];
for (const storageItem of this._reservoirStorage) {
const res = storageItem.collect(pointAttributes);
if (res !== null) {
exemplars.push(res);
}
}
this.reset();
return exemplars;
}
}
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