applicationinsights
Version:
Microsoft Application Insights module for Node.js
60 lines • 2.21 kB
JavaScript
;
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
Object.defineProperty(exports, "__esModule", { value: true });
exports.EtwWritter = void 0;
const fs = require("fs");
const path = require("path");
const util_1 = require("../../../shared/util");
class EtwWritter {
constructor() {
const nodeMajVer = parseInt(process.versions.node.split('.')[0], 10);
try {
this._etwModule = this._loadEtwModule(nodeMajVer);
if (this._etwModule) {
console.log('AppInsightsAgent: Successfully loaded ETW');
}
else {
console.log('AppInsightsAgent: ETW could not be loaded');
}
}
catch (e) {
console.log('Could not load ETW. Defaulting to console logging', e);
this._etwModule = undefined;
}
}
log(message, optional) {
if (this._etwModule) {
// eslint-disable-next-line @typescript-eslint/ban-types
this._etwModule.logInfoEvent(message, ...optional);
}
else {
console.log(util_1.Util.getInstance().stringify(message));
}
}
error(message, optional) {
if (this._etwModule) {
// eslint-disable-next-line @typescript-eslint/ban-types
this._etwModule.logErrEvent(message, ...optional);
}
else {
console.error(util_1.Util.getInstance().stringify(message));
}
}
_loadEtwModule(nodeMajVer) {
// Try to load precompiled ETW module if it exists and is "importable"
const dirname = path.join(__dirname, '../../../../../../../etw', `etw_${nodeMajVer}`);
try {
// throws an error if directory is not readable / does not exist
fs.accessSync(dirname, fs.constants.R_OK);
// eslint-disable-next-line @typescript-eslint/no-var-requires
return require(dirname);
}
catch (e) {
// Could not load ETW, return nothing
return undefined;
}
}
}
exports.EtwWritter = EtwWritter;
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