@multiplayer-app/session-recorder-common/dist/esm/SessionRecorderTraceIdRatioBasedSampler.js

Multiplayer Fullstack Session Recorder - opentelemetry

import { isValidTraceId } from '@opentelemetry/api';
import { SamplingDecision, } from '@opentelemetry/sdk-trace-base';
import { MULTIPLAYER_TRACE_DEBUG_PREFIX, MULTIPLAYER_TRACE_CONTINUOUS_DEBUG_PREFIX, } from './constants/constants.base';
var SessionRecorderTraceIdRatioBasedSampler = /** @class */ (function () {
    function SessionRecorderTraceIdRatioBasedSampler(_ratio) {
        if (_ratio === void 0) { _ratio = 0; }
        this._ratio = _ratio;
        this._ratio = this._normalize(_ratio);
        this._upperBound = Math.floor(this._ratio * 0xffffffff);
    }
    SessionRecorderTraceIdRatioBasedSampler.prototype.shouldSample = function (context, traceId) {
        if (traceId.startsWith(MULTIPLAYER_TRACE_DEBUG_PREFIX)
            || traceId.startsWith(MULTIPLAYER_TRACE_CONTINUOUS_DEBUG_PREFIX)) {
            return {
                decision: SamplingDecision.RECORD_AND_SAMPLED,
            };
        }
        var decision = SamplingDecision.NOT_RECORD;
        if (isValidTraceId(traceId)
            && this._accumulate(traceId) < this._upperBound) {
            decision = SamplingDecision.RECORD_AND_SAMPLED;
        }
        return { decision: decision };
    };
    SessionRecorderTraceIdRatioBasedSampler.prototype.toString = function () {
        return "SessionRecorderTraceIdRatioBasedSampler{".concat(this._ratio, "}");
    };
    SessionRecorderTraceIdRatioBasedSampler.prototype._normalize = function (ratio) {
        if (typeof ratio !== 'number' || isNaN(ratio))
            return 0;
        return ratio >= 1 ? 1 : ratio <= 0 ? 0 : ratio;
    };
    SessionRecorderTraceIdRatioBasedSampler.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 SessionRecorderTraceIdRatioBasedSampler;
}());
export { SessionRecorderTraceIdRatioBasedSampler };
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