@opentelemetry/core
Version:
OpenTelemetry Core provides constants and utilities shared by all OpenTelemetry SDK packages.
48 lines • 1.33 kB
JavaScript
/*
* Copyright The OpenTelemetry Authors
* SPDX-License-Identifier: Apache-2.0
*/
import { diag } from '@opentelemetry/api';
/**
* Returns a function that logs an error using the provided logger, or a
* console logger if one was not provided.
*/
export function loggingErrorHandler() {
return (ex) => {
diag.error(stringifyException(ex));
};
}
/**
* Converts an exception into a string representation
* @param {Exception} ex
*/
function stringifyException(ex) {
if (typeof ex === 'string') {
return ex;
}
else {
return JSON.stringify(flattenException(ex));
}
}
/**
* Flattens an exception into key-value pairs by traversing the prototype chain
* and coercing values to strings. Duplicate properties will not be overwritten;
* the first insert wins.
*/
function flattenException(ex) {
const result = {};
let current = ex;
while (current !== null) {
Object.getOwnPropertyNames(current).forEach(propertyName => {
if (result[propertyName])
return;
const value = current[propertyName];
if (value) {
result[propertyName] = String(value);
}
});
current = Object.getPrototypeOf(current);
}
return result;
}
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