@opentelemetry/api/build/src/api/propagation.js

"use strict";
/*
 * 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.
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.PropagationAPI = void 0;
const global_utils_1 = require("../internal/global-utils");
const NoopTextMapPropagator_1 = require("../propagation/NoopTextMapPropagator");
const TextMapPropagator_1 = require("../propagation/TextMapPropagator");
const context_helpers_1 = require("../baggage/context-helpers");
const utils_1 = require("../baggage/utils");
const diag_1 = require("./diag");
const API_NAME = 'propagation';
const NOOP_TEXT_MAP_PROPAGATOR = new NoopTextMapPropagator_1.NoopTextMapPropagator();
/**
 * Singleton object which represents the entry point to the OpenTelemetry Propagation API
 */
class PropagationAPI {
    /** Empty private constructor prevents end users from constructing a new instance of the API */
    constructor() {
        this.createBaggage = utils_1.createBaggage;
        this.getBaggage = context_helpers_1.getBaggage;
        this.setBaggage = context_helpers_1.setBaggage;
        this.deleteBaggage = context_helpers_1.deleteBaggage;
    }
    /** Get the singleton instance of the Propagator API */
    static getInstance() {
        if (!this._instance) {
            this._instance = new PropagationAPI();
        }
        return this._instance;
    }
    /**
     * Set the current propagator.
     *
     * @returns true if the propagator was successfully registered, else false
     */
    setGlobalPropagator(propagator) {
        return (0, global_utils_1.registerGlobal)(API_NAME, propagator, diag_1.DiagAPI.instance());
    }
    /**
     * Inject context into a carrier to be propagated inter-process
     *
     * @param context Context carrying tracing data to inject
     * @param carrier carrier to inject context into
     * @param setter Function used to set values on the carrier
     */
    inject(context, carrier, setter = TextMapPropagator_1.defaultTextMapSetter) {
        return this._getGlobalPropagator().inject(context, carrier, setter);
    }
    /**
     * Extract context from a carrier
     *
     * @param context Context which the newly created context will inherit from
     * @param carrier Carrier to extract context from
     * @param getter Function used to extract keys from a carrier
     */
    extract(context, carrier, getter = TextMapPropagator_1.defaultTextMapGetter) {
        return this._getGlobalPropagator().extract(context, carrier, getter);
    }
    /**
     * Return a list of all fields which may be used by the propagator.
     */
    fields() {
        return this._getGlobalPropagator().fields();
    }
    /** Remove the global propagator */
    disable() {
        (0, global_utils_1.unregisterGlobal)(API_NAME, diag_1.DiagAPI.instance());
    }
    _getGlobalPropagator() {
        return (0, global_utils_1.getGlobal)(API_NAME) || NOOP_TEXT_MAP_PROPAGATOR;
    }
}
exports.PropagationAPI = PropagationAPI;
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