@opentelemetry/core
Version:
OpenTelemetry Core provides constants and utilities shared by all OpenTelemetry SDK packages.
55 lines • 2.29 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.
*/
import { SamplingDecision, isValidTraceId, } from '@opentelemetry/api';
/**
* @deprecated Use the one defined in @opentelemetry/sdk-trace-base instead.
* Sampler that samples a given fraction of traces based of trace id deterministically.
*/
var TraceIdRatioBasedSampler = /** @class */ (function () {
function TraceIdRatioBasedSampler(_ratio) {
if (_ratio === void 0) { _ratio = 0; }
this._ratio = _ratio;
this._ratio = this._normalize(_ratio);
this._upperBound = Math.floor(this._ratio * 0xffffffff);
}
TraceIdRatioBasedSampler.prototype.shouldSample = function (context, traceId) {
return {
decision: isValidTraceId(traceId) && this._accumulate(traceId) < this._upperBound
? SamplingDecision.RECORD_AND_SAMPLED
: SamplingDecision.NOT_RECORD,
};
};
TraceIdRatioBasedSampler.prototype.toString = function () {
return "TraceIdRatioBased{" + this._ratio + "}";
};
TraceIdRatioBasedSampler.prototype._normalize = function (ratio) {
if (typeof ratio !== 'number' || isNaN(ratio))
return 0;
return ratio >= 1 ? 1 : ratio <= 0 ? 0 : ratio;
};
TraceIdRatioBasedSampler.prototype._accumulate = function (traceId) {
var accumulation = 0;
for (var i = 0; i < traceId.length / 8; i++) {
var pos = i * 8;
var part = parseInt(traceId.slice(pos, pos + 8), 16);
accumulation = (accumulation ^ part) >>> 0;
}
return accumulation;
};
return TraceIdRatioBasedSampler;
}());
export { TraceIdRatioBasedSampler };
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