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979bf48 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | "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.ROOT_CONTEXT = exports.createContextKey = void 0;
/** Get a key to uniquely identify a context value */
function createContextKey(description) {
// The specification states that for the same input, multiple calls should
// return different keys. Due to the nature of the JS dependency management
// system, this creates problems where multiple versions of some package
// could hold different keys for the same property.
//
// Therefore, we use Symbol.for which returns the same key for the same input.
return Symbol.for(description);
}
exports.createContextKey = createContextKey;
class BaseContext {
/**
* Construct a new context which inherits values from an optional parent context.
*
* @param parentContext a context from which to inherit values
*/
constructor(parentContext) {
// for minification
const self = this;
self._currentContext = parentContext ? new Map(parentContext) : new Map();
self.getValue = (key) => self._currentContext.get(key);
self.setValue = (key, value) => {
const context = new BaseContext(self._currentContext);
context._currentContext.set(key, value);
return context;
};
self.deleteValue = (key) => {
const context = new BaseContext(self._currentContext);
context._currentContext.delete(key);
return context;
};
}
}
/** The root context is used as the default parent context when there is no active context */
exports.ROOT_CONTEXT = new BaseContext();
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