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1"use strict";
2/*
3 * Copyright The OpenTelemetry Authors
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * https://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17Object.defineProperty(exports, "__esModule", { value: true });
18exports.ROOT_CONTEXT = exports.createContextKey = void 0;
19/** Get a key to uniquely identify a context value */
20function createContextKey(description) {
21 // The specification states that for the same input, multiple calls should
22 // return different keys. Due to the nature of the JS dependency management
23 // system, this creates problems where multiple versions of some package
24 // could hold different keys for the same property.
25 //
26 // Therefore, we use Symbol.for which returns the same key for the same input.
27 return Symbol.for(description);
28}
29exports.createContextKey = createContextKey;
30class BaseContext {
31 /**
32 * Construct a new context which inherits values from an optional parent context.
33 *
34 * @param parentContext a context from which to inherit values
35 */
36 constructor(parentContext) {
37 // for minification
38 const self = this;
39 self._currentContext = parentContext ? new Map(parentContext) : new Map();
40 self.getValue = (key) => self._currentContext.get(key);
41 self.setValue = (key, value) => {
42 const context = new BaseContext(self._currentContext);
43 context._currentContext.set(key, value);
44 return context;
45 };
46 self.deleteValue = (key) => {
47 const context = new BaseContext(self._currentContext);
48 context._currentContext.delete(key);
49 return context;
50 };
51 }
52}
53/** The root context is used as the default parent context when there is no active context */
54exports.ROOT_CONTEXT = new BaseContext();
55//# sourceMappingURL=context.js.map
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