@ogcio/o11y-sdk-node/dist/sdk-node/lib/url-sampler.js

Opentelemetry standard instrumentation SDK for NodeJS based project

import { SpanKind, } from "@opentelemetry/api";
import { SamplingDecision, } from "@opentelemetry/sdk-trace-base";
export class UrlSampler {
    _samplerCondition;
    _nextSampler;
    constructor(samplerCondition, nextSampler) {
        this._samplerCondition = samplerCondition ?? [];
        this._nextSampler = nextSampler;
    }
    shouldSample(_context, traceId, _spanName, _spanKind, attributes, _links) {
        // Check both http.target and url.path (@fastify/otel) attributes
        const url = attributes["http.target"]?.toString() ||
            attributes["url.path"]?.toString();
        if (url) {
            for (const condition of this._samplerCondition) {
                if ((condition.type === "equals" && url === condition.url) ||
                    (condition.type === "endsWith" && url.endsWith(condition.url)) ||
                    (condition.type === "includes" && url.includes(condition.url))) {
                    return { decision: SamplingDecision.NOT_RECORD };
                }
            }
        }
        return this._nextSampler.shouldSample(_context, traceId, _spanName, _spanKind, attributes, _links);
    }
    toString() {
        return "UrlSampler";
    }
}