/********************************************************************************
 * Copyright (C) 2018 Ericsson and others.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the Eclipse
 * Public License v. 2.0 are satisfied: GNU General Public License, version 2
 * with the GNU Classpath Exception which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 ********************************************************************************/ import { injectable , inject } from '@theia/core/shared/inversify' ; import { MetricsContribution } from './metrics-contribution' ; import { ApplicationPackage } from '@theia/core/shared/@theia/application-package' ; import { PROMETHEUS_REGEXP , toPrometheusValidName } from './prometheus' ; const metricsName = 'theia_extension_version' ; @ injectable ( ) export class ExtensionMetricsContribution implements MetricsContribution { private metrics : string = '' ; @ inject ( ApplicationPackage ) protected readonly applicationPackage : ApplicationPackage ; getMetrics ( ) { return this . metrics ; } startCollecting ( ) { let latestMetrics = '' ; const installedExtensions = this . applicationPackage . extensionPackages ; latestMetrics += `# HELP ${ metricsName } Theia extension version info.\n` ; latestMetrics += `# TYPE ${ metricsName } gauge\n` ; installedExtensions . forEach ( extensionInfo => { let extensionName = extensionInfo . name ; if ( ! PROMETHEUS_REGEXP . test ( extensionName ) ) { extensionName = toPrometheusValidName ( extensionName ) ; } const metricsValue = metricsName + `{extension="${ extensionName }",version="${ extensionInfo . version }"} 1` ; latestMetrics += metricsValue + '\n' ; } ) ; this . metrics = latestMetrics ; } }