enhanced-adot-node-autoinstrumentation/build/src/sampler/fallback-sampler.js

This package provides Amazon Web Services distribution of the OpenTelemetry Node Instrumentation, which allows for auto-instrumentation of NodeJS applications.

"use strict";
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
Object.defineProperty(exports, "__esModule", { value: true });
exports.FallbackSampler = void 0;
const sdk_trace_base_1 = require("@opentelemetry/sdk-trace-base");
const rate_limiting_sampler_1 = require("./rate-limiting-sampler");
// FallbackSampler samples 1 req/sec and additional 5% of requests using TraceIdRatioBasedSampler.
class FallbackSampler {
    constructor() {
        this.fixedRateSampler = new sdk_trace_base_1.TraceIdRatioBasedSampler(0.05);
        this.rateLimitingSampler = new rate_limiting_sampler_1.RateLimitingSampler(1);
    }
    shouldSample(context, traceId, spanName, spanKind, attributes, links) {
        const samplingResult = this.rateLimitingSampler.shouldSample(context, traceId, spanName, spanKind, attributes, links);
        if (samplingResult.decision !== sdk_trace_base_1.SamplingDecision.NOT_RECORD) {
            return samplingResult;
        }
        return this.fixedRateSampler.shouldSample(context, traceId);
    }
    toString() {
        return 'FallbackSampler{fallback sampling with sampling config of 1 req/sec and 5% of additional requests';
    }
}
exports.FallbackSampler = FallbackSampler;
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