+
+ private static getConfigurationFileWatcher(): fs.FSWatcher {
+ try {
+ return fs.watch(Configuration.configurationFile, (event, filename): void => {
+ if (filename && event === 'change') {
+ // Nullify to force configuration file reading
+ Configuration.configuration = null;
+ if (!Configuration.isUndefined(Configuration.configurationChangeCallback)) {
+ Configuration.configurationChangeCallback().catch((error) => {
+ throw typeof error === 'string' ? new Error(error) : error;
+ });
+ }
+ }
+ });
+ } catch (error) {
+ Configuration.handleFileException(
+ Configuration.logPrefix(),
+ FileType.Configuration,
+ Configuration.configurationFile,
+ error as NodeJS.ErrnoException
+ );
+ }
+ }
+
+ private static isCFEnvironment(): boolean {
+ return process.env.VCAP_APPLICATION !== undefined;
+ }
+
+ private static getDefaultPerformanceStorageUri(storageType: StorageType) {
+ const SQLiteFileName = `${Constants.DEFAULT_PERFORMANCE_RECORDS_DB_NAME}.db`;
+ switch (storageType) {
+ case StorageType.JSON_FILE:
+ return `file://${path.join(
+ path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../../'),
+ Constants.DEFAULT_PERFORMANCE_RECORDS_FILENAME
+ )}`;
+ case StorageType.SQLITE:
+ return `file://${path.join(
+ path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../../'),
+ SQLiteFileName
+ )}`;
+ default:
+ throw new Error(`Performance storage URI is mandatory with storage type '${storageType}'`);
+ }
+ }
+
+ private static isObject(item): boolean {
+ return item && typeof item === 'object' && Array.isArray(item) === false;
+ }
+
+ private static objectHasOwnProperty(object: unknown, property: string): boolean {
+ return Object.prototype.hasOwnProperty.call(object, property) as boolean;
+ }
+
+ private static isUndefined(obj: unknown): boolean {
+ return typeof obj === 'undefined';
+ }
+
+ private static deepMerge(target: object, ...sources: object[]): object {
+ if (!sources.length) {
+ return target;
+ }
+ const source = sources.shift();
+
+ if (Configuration.isObject(target) && Configuration.isObject(source)) {
+ for (const key in source) {
+ if (Configuration.isObject(source[key])) {
+ if (!target[key]) {
+ Object.assign(target, { [key]: {} });
+ }
+ // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
+ Configuration.deepMerge(target[key], source[key]);
+ } else {
+ // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+ Object.assign(target, { [key]: source[key] });
+ }
+ }
+ }
+ return Configuration.deepMerge(target, ...sources);
+ }
+
+ private static handleFileException(
+ logPrefix: string,
+ fileType: FileType,
+ filePath: string,
+ error: NodeJS.ErrnoException,
+ params: HandleErrorParams<EmptyObject> = { throwError: true }
+ ): void {
+ const prefix = logPrefix.length !== 0 ? logPrefix + ' ' : '';
+ if (error.code === 'ENOENT') {
+ console.error(
+ chalk.green(prefix) + chalk.red(fileType + ' file ' + filePath + ' not found: '),
+ error
+ );
+ } else if (error.code === 'EEXIST') {
+ console.error(
+ chalk.green(prefix) + chalk.red(fileType + ' file ' + filePath + ' already exists: '),
+ error
+ );
+ } else if (error.code === 'EACCES') {
+ console.error(
+ chalk.green(prefix) + chalk.red(fileType + ' file ' + filePath + ' access denied: '),
+ error
+ );
+ } else {
+ console.error(
+ chalk.green(prefix) + chalk.red(fileType + ' file ' + filePath + ' error: '),
+ error
+ );
+ }
+ if (params?.throwError) {
+ throw error;
+ }
+ }