@opentelemetry/core
Version:
OpenTelemetry Core provides constants and utilities shared by all OpenTelemetry SDK packages.
101 lines • 4.18 kB
JavaScript
/*
* 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.
*/
var __values = (this && this.__values) || function(o) {
var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
if (m) return m.call(o);
if (o && typeof o.length === "number") return {
next: function () {
if (o && i >= o.length) o = void 0;
return { value: o && o[i++], done: !o };
}
};
throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
};
import { diag, } from '@opentelemetry/api';
/** Combines multiple propagators into a single propagator. */
var CompositePropagator = /** @class */ (function () {
/**
* Construct a composite propagator from a list of propagators.
*
* @param [config] Configuration object for composite propagator
*/
function CompositePropagator(config) {
if (config === void 0) { config = {}; }
var _a;
this._propagators = (_a = config.propagators) !== null && _a !== void 0 ? _a : [];
this._fields = Array.from(new Set(this._propagators
// older propagators may not have fields function, null check to be sure
.map(function (p) { return (typeof p.fields === 'function' ? p.fields() : []); })
.reduce(function (x, y) { return x.concat(y); }, [])));
}
/**
* 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
*/
CompositePropagator.prototype.inject = function (context, carrier, setter) {
var e_1, _a;
try {
for (var _b = __values(this._propagators), _c = _b.next(); !_c.done; _c = _b.next()) {
var propagator = _c.value;
try {
propagator.inject(context, carrier, setter);
}
catch (err) {
diag.warn("Failed to inject with " + propagator.constructor.name + ". Err: " + err.message);
}
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_1) throw e_1.error; }
}
};
/**
* 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
*/
CompositePropagator.prototype.extract = function (context, carrier, getter) {
return this._propagators.reduce(function (ctx, propagator) {
try {
return propagator.extract(ctx, carrier, getter);
}
catch (err) {
diag.warn("Failed to inject with " + propagator.constructor.name + ". Err: " + err.message);
}
return ctx;
}, context);
};
CompositePropagator.prototype.fields = function () {
// return a new array so our fields cannot be modified
return this._fields.slice();
};
return CompositePropagator;
}());
export { CompositePropagator };
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