@opentelemetry/core/dist/propagation/composite.cjs

OpenTelemetry Core provides constants and utilities shared by all OpenTelemetry SDK packages.

let _opentelemetry_api = require("@opentelemetry/api");
//#region src/propagation/composite.ts
/** Combines multiple propagators into a single propagator. */
var CompositePropagator = class {
	_propagators;
	_fields;
	/**
	* Construct a composite propagator from a list of propagators.
	*
	* @param [config] Configuration object for composite propagator
	*/
	constructor(config = {}) {
		this._propagators = config.propagators ?? [];
		const fields = /* @__PURE__ */ new Set();
		for (const propagator of this._propagators) {
			const propagatorFields = typeof propagator.fields === "function" ? propagator.fields() : [];
			for (const field of propagatorFields) fields.add(field);
		}
		this._fields = Array.from(fields);
	}
	/**
	* Run each of the configured propagators with the given context and carrier.
	* Propagators are run in the order they are configured, so if multiple
	* propagators write the same carrier key, the propagator later in the list
	* will "win".
	*
	* @param context Context to inject
	* @param carrier Carrier into which context will be injected
	*/
	inject(context, carrier, setter) {
		for (const propagator of this._propagators) try {
			propagator.inject(context, carrier, setter);
		} catch (err) {
			_opentelemetry_api.diag.warn(`Failed to inject with ${propagator.constructor.name}. Err: ${err.message}`);
		}
	}
	/**
	* Run each of the configured propagators with the given context and carrier.
	* Propagators are run in the order they are configured, so if multiple
	* propagators write the same context key, the propagator later in the list
	* will "win".
	*
	* @param context Context to add values to
	* @param carrier Carrier from which to extract context
	*/
	extract(context, carrier, getter) {
		return this._propagators.reduce((ctx, propagator) => {
			try {
				return propagator.extract(ctx, carrier, getter);
			} catch (err) {
				_opentelemetry_api.diag.warn(`Failed to extract with ${propagator.constructor.name}. Err: ${err.message}`);
			}
			return ctx;
		}, context);
	}
	fields() {
		return this._fields.slice();
	}
};
//#endregion
exports.CompositePropagator = CompositePropagator;

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