64 lines
2.6 KiB
JavaScript
64 lines
2.6 KiB
JavaScript
/*
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* Copyright The OpenTelemetry Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { isTracingSuppressed } from '@opentelemetry/core';
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import { B3MultiPropagator } from './B3MultiPropagator';
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import { B3SinglePropagator } from './B3SinglePropagator';
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import { B3_CONTEXT_HEADER } from './constants';
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import { B3InjectEncoding } from './types';
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/**
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* Propagator that extracts B3 context in both single and multi-header variants,
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* with configurable injection format defaulting to B3 single-header. Due to
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* the asymmetry in injection and extraction formats this is not suitable to
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* be implemented as a composite propagator.
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* Based on: https://github.com/openzipkin/b3-propagation
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*/
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var B3Propagator = /** @class */ (function () {
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function B3Propagator(config) {
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if (config === void 0) { config = {}; }
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this._b3MultiPropagator = new B3MultiPropagator();
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this._b3SinglePropagator = new B3SinglePropagator();
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if (config.injectEncoding === B3InjectEncoding.MULTI_HEADER) {
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this._inject = this._b3MultiPropagator.inject;
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this._fields = this._b3MultiPropagator.fields();
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}
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else {
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this._inject = this._b3SinglePropagator.inject;
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this._fields = this._b3SinglePropagator.fields();
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}
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}
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B3Propagator.prototype.inject = function (context, carrier, setter) {
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if (isTracingSuppressed(context)) {
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return;
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}
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this._inject(context, carrier, setter);
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};
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B3Propagator.prototype.extract = function (context, carrier, getter) {
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var header = getter.get(carrier, B3_CONTEXT_HEADER);
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var b3Context = Array.isArray(header) ? header[0] : header;
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if (b3Context) {
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return this._b3SinglePropagator.extract(context, carrier, getter);
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}
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else {
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return this._b3MultiPropagator.extract(context, carrier, getter);
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}
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};
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B3Propagator.prototype.fields = function () {
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return this._fields;
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};
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return B3Propagator;
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}());
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export { B3Propagator };
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//# sourceMappingURL=B3Propagator.js.map
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