/opt/canhelp/node_modules/@opentelemetry/api/build/esm/context
Edit: /opt/canhelp/node_modules/@opentelemetry/api/build/esm/context/context.js (1662B)
/*
* Copyright The OpenTelemetry Authors
* SPDX-License-Identifier: Apache-2.0
*/
/**
* Get a key to uniquely identify a context value
*
* @since 1.0.0
*/
export 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);
}
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
*
* @since 1.0.0
*/
export const ROOT_CONTEXT = new BaseContext();
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