X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Futils%2FConfiguration.ts;h=66abd3e101dc6e427cac6c5c35babe61d9fdd02e;hb=c1c97db8708f26af10385f6e86af7cd933891bb8;hp=6f1705a69b813082cd62e2850153a357374d1337;hpb=dada83ec9f4fb9426070147b43615d494ae86fcc;p=e-mobility-charging-stations-simulator.git

diff --git a/src/utils/Configuration.ts b/src/utils/Configuration.ts
index 6f1705a6..66abd3e1 100644
--- a/src/utils/Configuration.ts
+++ b/src/utils/Configuration.ts
@@ -1,16 +1,18 @@
-import fs from 'node:fs';
-import path from 'node:path';
+import { type FSWatcher, readFileSync, watch } from 'node:fs';
+import { dirname, join, resolve } from 'node:path';
 import { fileURLToPath } from 'node:url';
 
 import chalk from 'chalk';
 import merge from 'just-merge';
-import { WorkerChoiceStrategies } from 'poolifier';
 
-import { Constants, FileUtils, Utils } from './internal';
+import { Constants } from './Constants';
+import { hasOwnProp, isCFEnvironment, isNotEmptyString, isUndefined } from './Utils';
 import {
   ApplicationProtocol,
   type ConfigurationData,
+  ConfigurationSection,
   FileType,
+  type LogConfiguration,
   type StationTemplateUrl,
   type StorageConfiguration,
   StorageType,
@@ -21,40 +23,163 @@ import {
 import { WorkerConstants, WorkerProcessType } from '../worker';
 
 export class Configuration {
-  private static configurationFile = path.join(
-    path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../'),
+  private static configurationFile = join(
+    dirname(fileURLToPath(import.meta.url)),
     'assets',
-    'config.json'
+    'config.json',
   );
 
-  private static configurationFileWatcher: fs.FSWatcher | undefined;
-  private static configuration: ConfigurationData | null = null;
+  private static configurationFileWatcher: FSWatcher | undefined;
+  private static configurationData: ConfigurationData | null = null;
+  private static configurationSectionCache = new Map<
+    ConfigurationSection,
+    LogConfiguration | StorageConfiguration | WorkerConfiguration | UIServerConfiguration
+  >([
+    [ConfigurationSection.log, Configuration.buildLogSection()],
+    [ConfigurationSection.performanceStorage, Configuration.buildPerformanceStorageSection()],
+    [ConfigurationSection.worker, Configuration.buildWorkerSection()],
+    [ConfigurationSection.uiServer, Configuration.buildUIServerSection()],
+  ]);
+
   private static configurationChangeCallback: () => Promise<void>;
 
   private constructor() {
     // This is intentional
   }
 
-  static setConfigurationChangeCallback(cb: () => Promise<void>): void {
+  public static setConfigurationChangeCallback(cb: () => Promise<void>): void {
     Configuration.configurationChangeCallback = cb;
   }
 
-  static getLogStatisticsInterval(): number | undefined {
+  public static getConfigurationSection<T>(sectionName: ConfigurationSection): T {
+    if (!Configuration.configurationSectionCache.has(sectionName)) {
+      switch (sectionName) {
+        case ConfigurationSection.log:
+          Configuration.configurationSectionCache.set(sectionName, Configuration.buildLogSection());
+          break;
+        case ConfigurationSection.performanceStorage:
+          Configuration.configurationSectionCache.set(
+            sectionName,
+            Configuration.buildPerformanceStorageSection(),
+          );
+          break;
+        case ConfigurationSection.worker:
+          Configuration.configurationSectionCache.set(
+            sectionName,
+            Configuration.buildWorkerSection(),
+          );
+          break;
+        case ConfigurationSection.uiServer:
+          Configuration.configurationSectionCache.set(
+            sectionName,
+            Configuration.buildUIServerSection(),
+          );
+          break;
+        default:
+          // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
+          throw new Error(`Unknown configuration section '${sectionName}'`);
+      }
+    }
+    return Configuration.configurationSectionCache.get(sectionName) as T;
+  }
+
+  public static getAutoReconnectMaxRetries(): number | undefined {
+    Configuration.warnDeprecatedConfigurationKey(
+      'autoReconnectTimeout',
+      undefined,
+      "Use 'ConnectionTimeOut' OCPP parameter in charging station template instead",
+    );
+    Configuration.warnDeprecatedConfigurationKey(
+      'connectionTimeout',
+      undefined,
+      "Use 'ConnectionTimeOut' OCPP parameter in charging station template instead",
+    );
+    Configuration.warnDeprecatedConfigurationKey(
+      'autoReconnectMaxRetries',
+      undefined,
+      'Use it in charging station template instead',
+    );
+    if (hasOwnProp(Configuration.getConfigurationData(), 'autoReconnectMaxRetries')) {
+      return Configuration.getConfigurationData()?.autoReconnectMaxRetries;
+    }
+  }
+
+  public static getStationTemplateUrls(): StationTemplateUrl[] | undefined {
+    Configuration.warnDeprecatedConfigurationKey(
+      'stationTemplateURLs',
+      undefined,
+      "Use 'stationTemplateUrls' instead",
+    );
+    // eslint-disable-next-line @typescript-eslint/dot-notation
+    !isUndefined(Configuration.getConfigurationData()!['stationTemplateURLs']) &&
+      (Configuration.getConfigurationData()!.stationTemplateUrls =
+        Configuration.getConfigurationData()![
+          // eslint-disable-next-line @typescript-eslint/dot-notation
+          'stationTemplateURLs'
+        ] as StationTemplateUrl[]);
+    Configuration.getConfigurationData()!.stationTemplateUrls.forEach(
+      (stationTemplateUrl: StationTemplateUrl) => {
+        // eslint-disable-next-line @typescript-eslint/dot-notation
+        if (!isUndefined(stationTemplateUrl['numberOfStation'])) {
+          console.error(
+            `${chalk.green(Configuration.logPrefix())} ${chalk.red(
+              `Deprecated configuration key 'numberOfStation' usage for template file '${stationTemplateUrl.file}' in 'stationTemplateUrls'. Use 'numberOfStations' instead`,
+            )}`,
+          );
+        }
+      },
+    );
+    return Configuration.getConfigurationData()?.stationTemplateUrls;
+  }
+
+  public static getSupervisionUrls(): string | string[] | undefined {
+    Configuration.warnDeprecatedConfigurationKey(
+      'supervisionURLs',
+      undefined,
+      "Use 'supervisionUrls' instead",
+    );
+    // eslint-disable-next-line @typescript-eslint/dot-notation
+    if (!isUndefined(Configuration.getConfigurationData()!['supervisionURLs'])) {
+      Configuration.getConfigurationData()!.supervisionUrls = Configuration.getConfigurationData()![
+        // eslint-disable-next-line @typescript-eslint/dot-notation
+        'supervisionURLs'
+      ] as string | string[];
+    }
+    return Configuration.getConfigurationData()?.supervisionUrls;
+  }
+
+  public static getSupervisionUrlDistribution(): SupervisionUrlDistribution | undefined {
     Configuration.warnDeprecatedConfigurationKey(
-      'statisticsDisplayInterval',
+      'distributeStationToTenantEqually',
       undefined,
-      "Use 'logStatisticsInterval' instead"
+      "Use 'supervisionUrlDistribution' instead",
     );
-    // Read conf
-    return Utils.objectHasOwnProperty(Configuration.getConfig(), 'logStatisticsInterval')
-      ? Configuration.getConfig()?.logStatisticsInterval
-      : Constants.DEFAULT_LOG_STATISTICS_INTERVAL;
+    Configuration.warnDeprecatedConfigurationKey(
+      'distributeStationsToTenantsEqually',
+      undefined,
+      "Use 'supervisionUrlDistribution' instead",
+    );
+    return hasOwnProp(Configuration.getConfigurationData(), 'supervisionUrlDistribution')
+      ? Configuration.getConfigurationData()?.supervisionUrlDistribution
+      : SupervisionUrlDistribution.ROUND_ROBIN;
   }
 
-  static getUIServer(): UIServerConfiguration {
-    if (Utils.objectHasOwnProperty(Configuration.getConfig(), 'uiWebSocketServer')) {
+  public static workerPoolInUse(): boolean {
+    return [WorkerProcessType.dynamicPool, WorkerProcessType.staticPool].includes(
+      Configuration.buildWorkerSection().processType!,
+    );
+  }
+
+  public static workerDynamicPoolInUse(): boolean {
+    return Configuration.buildWorkerSection().processType === WorkerProcessType.dynamicPool;
+  }
+
+  private static buildUIServerSection(): UIServerConfiguration {
+    if (hasOwnProp(Configuration.getConfigurationData(), 'uiWebSocketServer')) {
       console.error(
-        chalk`{green ${Configuration.logPrefix()}} {red Deprecated configuration section 'uiWebSocketServer' usage. Use 'uiServer' instead}`
+        `${chalk.green(Configuration.logPrefix())} ${chalk.red(
+          `Deprecated configuration section 'uiWebSocketServer' usage. Use '${ConfigurationSection.uiServer}' instead`,
+        )}`,
       );
     }
     let uiServerConfiguration: UIServerConfiguration = {
@@ -65,245 +190,240 @@ export class Configuration {
         port: Constants.DEFAULT_UI_SERVER_PORT,
       },
     };
-    if (Utils.objectHasOwnProperty(Configuration.getConfig(), 'uiServer')) {
+    if (hasOwnProp(Configuration.getConfigurationData(), ConfigurationSection.uiServer)) {
       uiServerConfiguration = merge<UIServerConfiguration>(
         uiServerConfiguration,
-        Configuration.getConfig()?.uiServer
+        Configuration.getConfigurationData()!.uiServer!,
       );
     }
-    if (Utils.isCFEnvironment() === true) {
+    if (isCFEnvironment() === true) {
       delete uiServerConfiguration.options?.host;
-      uiServerConfiguration.options.port = parseInt(process.env.PORT);
+      uiServerConfiguration.options!.port = parseInt(process.env.PORT!);
     }
     return uiServerConfiguration;
   }
 
-  static getPerformanceStorage(): StorageConfiguration {
-    Configuration.warnDeprecatedConfigurationKey('URI', 'performanceStorage', "Use 'uri' instead");
+  private static buildPerformanceStorageSection(): StorageConfiguration {
+    Configuration.warnDeprecatedConfigurationKey(
+      'URI',
+      ConfigurationSection.performanceStorage,
+      "Use 'uri' instead",
+    );
     let storageConfiguration: StorageConfiguration = {
       enabled: false,
       type: StorageType.JSON_FILE,
       uri: this.getDefaultPerformanceStorageUri(StorageType.JSON_FILE),
     };
-    if (Utils.objectHasOwnProperty(Configuration.getConfig(), 'performanceStorage')) {
+    if (hasOwnProp(Configuration.getConfigurationData(), ConfigurationSection.performanceStorage)) {
       storageConfiguration = {
         ...storageConfiguration,
-        ...Configuration.getConfig()?.performanceStorage,
+        ...Configuration.getConfigurationData()?.performanceStorage,
+        ...(Configuration.getConfigurationData()?.performanceStorage?.type ===
+          StorageType.JSON_FILE &&
+          Configuration.getConfigurationData()?.performanceStorage?.uri && {
+            uri: Configuration.buildPerformanceUriFilePath(
+              new URL(Configuration.getConfigurationData()!.performanceStorage!.uri!).pathname,
+            ),
+          }),
       };
     }
     return storageConfiguration;
   }
 
-  static getAutoReconnectMaxRetries(): number | undefined {
+  private static buildLogSection(): LogConfiguration {
     Configuration.warnDeprecatedConfigurationKey(
-      'autoReconnectTimeout',
+      'logEnabled',
       undefined,
-      "Use 'ConnectionTimeOut' OCPP parameter in charging station template instead"
+      `Use '${ConfigurationSection.log}' section to define the logging enablement instead`,
     );
     Configuration.warnDeprecatedConfigurationKey(
-      'connectionTimeout',
+      'logFile',
       undefined,
-      "Use 'ConnectionTimeOut' OCPP parameter in charging station template instead"
+      `Use '${ConfigurationSection.log}' section to define the log file instead`,
     );
     Configuration.warnDeprecatedConfigurationKey(
-      'autoReconnectMaxRetries',
+      'logErrorFile',
       undefined,
-      'Use it in charging station template instead'
+      `Use '${ConfigurationSection.log}' section to define the log error file instead`,
     );
-    // Read conf
-    if (Utils.objectHasOwnProperty(Configuration.getConfig(), 'autoReconnectMaxRetries')) {
-      return Configuration.getConfig()?.autoReconnectMaxRetries;
-    }
-  }
-
-  static getStationTemplateUrls(): StationTemplateUrl[] | undefined {
     Configuration.warnDeprecatedConfigurationKey(
-      'stationTemplateURLs',
+      'logConsole',
       undefined,
-      "Use 'stationTemplateUrls' instead"
+      `Use '${ConfigurationSection.log}' section to define the console logging enablement instead`,
     );
-    !Utils.isUndefined(Configuration.getConfig()['stationTemplateURLs']) &&
-      (Configuration.getConfig().stationTemplateUrls = Configuration.getConfig()[
-        'stationTemplateURLs'
-      ] as unknown as StationTemplateUrl[]);
-    Configuration.getConfig().stationTemplateUrls.forEach((stationUrl: StationTemplateUrl) => {
-      if (!Utils.isUndefined(stationUrl['numberOfStation'])) {
-        console.error(
-          chalk`{green ${Configuration.logPrefix()}} {red Deprecated configuration key 'numberOfStation' usage for template file '${
-            stationUrl.file
-          }' in 'stationTemplateUrls'. Use 'numberOfStations' instead}`
-        );
-      }
-    });
-    // Read conf
-    return Configuration.getConfig()?.stationTemplateUrls;
-  }
-
-  static getWorker(): WorkerConfiguration {
     Configuration.warnDeprecatedConfigurationKey(
-      'useWorkerPool',
+      'logStatisticsInterval',
       undefined,
-      "Use 'worker' section to define the type of worker process model instead"
+      `Use '${ConfigurationSection.log}' section to define the log statistics interval instead`,
     );
     Configuration.warnDeprecatedConfigurationKey(
-      'workerProcess',
+      'logLevel',
       undefined,
-      "Use 'worker' section to define the type of worker process model instead"
+      `Use '${ConfigurationSection.log}' section to define the log level instead`,
     );
     Configuration.warnDeprecatedConfigurationKey(
-      'workerStartDelay',
+      'logFormat',
       undefined,
-      "Use 'worker' section to define the worker start delay instead"
+      `Use '${ConfigurationSection.log}' section to define the log format instead`,
     );
     Configuration.warnDeprecatedConfigurationKey(
-      'chargingStationsPerWorker',
+      'logRotate',
       undefined,
-      "Use 'worker' section to define the number of element(s) per worker instead"
+      `Use '${ConfigurationSection.log}' section to define the log rotation enablement instead`,
     );
     Configuration.warnDeprecatedConfigurationKey(
-      'elementStartDelay',
+      'logMaxFiles',
       undefined,
-      "Use 'worker' section to define the worker's element start delay instead"
+      `Use '${ConfigurationSection.log}' section to define the log maximum files instead`,
     );
     Configuration.warnDeprecatedConfigurationKey(
-      'workerPoolMinSize',
+      'logMaxSize',
       undefined,
-      "Use 'worker' section to define the worker pool minimum size instead"
+      `Use '${ConfigurationSection.log}' section to define the log maximum size instead`,
     );
+    const defaultLogConfiguration: LogConfiguration = {
+      enabled: true,
+      file: 'logs/combined.log',
+      errorFile: 'logs/error.log',
+      statisticsInterval: Constants.DEFAULT_LOG_STATISTICS_INTERVAL,
+      level: 'info',
+      format: 'simple',
+      rotate: true,
+    };
+    const deprecatedLogConfiguration: LogConfiguration = {
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'logEnabled') && {
+        enabled: Configuration.getConfigurationData()?.logEnabled,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'logFile') && {
+        file: Configuration.getConfigurationData()?.logFile,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'logErrorFile') && {
+        errorFile: Configuration.getConfigurationData()?.logErrorFile,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'logStatisticsInterval') && {
+        statisticsInterval: Configuration.getConfigurationData()?.logStatisticsInterval,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'logLevel') && {
+        level: Configuration.getConfigurationData()?.logLevel,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'logConsole') && {
+        console: Configuration.getConfigurationData()?.logConsole,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'logFormat') && {
+        format: Configuration.getConfigurationData()?.logFormat,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'logRotate') && {
+        rotate: Configuration.getConfigurationData()?.logRotate,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'logMaxFiles') && {
+        maxFiles: Configuration.getConfigurationData()?.logMaxFiles,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'logMaxSize') && {
+        maxSize: Configuration.getConfigurationData()?.logMaxSize,
+      }),
+    };
+    const logConfiguration: LogConfiguration = {
+      ...defaultLogConfiguration,
+      ...deprecatedLogConfiguration,
+      ...(hasOwnProp(Configuration.getConfigurationData(), ConfigurationSection.log) &&
+        Configuration.getConfigurationData()?.log),
+    };
+    return logConfiguration;
+  }
+
+  private static buildWorkerSection(): WorkerConfiguration {
     Configuration.warnDeprecatedConfigurationKey(
-      'workerPoolSize;',
+      'useWorkerPool',
       undefined,
-      "Use 'worker' section to define the worker pool maximum size instead"
+      `Use '${ConfigurationSection.worker}' section to define the type of worker process model instead`,
     );
     Configuration.warnDeprecatedConfigurationKey(
-      'workerPoolMaxSize;',
+      'workerProcess',
       undefined,
-      "Use 'worker' section to define the worker pool maximum size instead"
+      `Use '${ConfigurationSection.worker}' section to define the type of worker process model instead`,
     );
     Configuration.warnDeprecatedConfigurationKey(
-      'workerPoolStrategy;',
+      'workerStartDelay',
       undefined,
-      "Use 'worker' section to define the worker pool strategy instead"
+      `Use '${ConfigurationSection.worker}' section to define the worker start delay instead`,
     );
-    let workerConfiguration: WorkerConfiguration = {
-      processType: Utils.objectHasOwnProperty(Configuration.getConfig(), 'workerProcess')
-        ? Configuration.getConfig()?.workerProcess
-        : WorkerProcessType.WORKER_SET,
-      startDelay: Utils.objectHasOwnProperty(Configuration.getConfig(), 'workerStartDelay')
-        ? Configuration.getConfig()?.workerStartDelay
-        : WorkerConstants.DEFAULT_WORKER_START_DELAY,
-      elementsPerWorker: Utils.objectHasOwnProperty(
-        Configuration.getConfig(),
-        'chargingStationsPerWorker'
-      )
-        ? Configuration.getConfig()?.chargingStationsPerWorker
-        : WorkerConstants.DEFAULT_ELEMENTS_PER_WORKER,
-      elementStartDelay: Utils.objectHasOwnProperty(Configuration.getConfig(), 'elementStartDelay')
-        ? Configuration.getConfig()?.elementStartDelay
-        : WorkerConstants.DEFAULT_ELEMENT_START_DELAY,
-      poolMinSize: Utils.objectHasOwnProperty(Configuration.getConfig(), 'workerPoolMinSize')
-        ? Configuration.getConfig()?.workerPoolMinSize
-        : WorkerConstants.DEFAULT_POOL_MIN_SIZE,
-      poolMaxSize: Utils.objectHasOwnProperty(Configuration.getConfig(), 'workerPoolMaxSize')
-        ? Configuration.getConfig()?.workerPoolMaxSize
-        : WorkerConstants.DEFAULT_POOL_MAX_SIZE,
-      poolStrategy:
-        Configuration.getConfig()?.workerPoolStrategy ?? WorkerChoiceStrategies.ROUND_ROBIN,
-    };
-    if (Utils.objectHasOwnProperty(Configuration.getConfig(), 'worker')) {
-      workerConfiguration = { ...workerConfiguration, ...Configuration.getConfig()?.worker };
-    }
-    return workerConfiguration;
-  }
-
-  static getLogConsole(): boolean | undefined {
     Configuration.warnDeprecatedConfigurationKey(
-      'consoleLog',
+      'chargingStationsPerWorker',
       undefined,
-      "Use 'logConsole' instead"
-    );
-    return Utils.objectHasOwnProperty(Configuration.getConfig(), 'logConsole')
-      ? Configuration.getConfig()?.logConsole
-      : false;
-  }
-
-  static getLogFormat(): string | undefined {
-    return Utils.objectHasOwnProperty(Configuration.getConfig(), 'logFormat')
-      ? Configuration.getConfig()?.logFormat
-      : 'simple';
-  }
-
-  static getLogRotate(): boolean | undefined {
-    return Utils.objectHasOwnProperty(Configuration.getConfig(), 'logRotate')
-      ? Configuration.getConfig()?.logRotate
-      : true;
-  }
-
-  static getLogMaxFiles(): number | string | false | undefined {
-    return (
-      Utils.objectHasOwnProperty(Configuration.getConfig(), 'logMaxFiles') &&
-      Configuration.getConfig()?.logMaxFiles
+      `Use '${ConfigurationSection.worker}' section to define the number of element(s) per worker instead`,
     );
-  }
-
-  static getLogMaxSize(): number | string | false | undefined {
-    return (
-      Utils.objectHasOwnProperty(Configuration.getConfig(), 'logMaxFiles') &&
-      Configuration.getConfig()?.logMaxSize
+    Configuration.warnDeprecatedConfigurationKey(
+      'elementStartDelay',
+      undefined,
+      `Use '${ConfigurationSection.worker}' section to define the worker's element start delay instead`,
     );
-  }
-
-  static getLogLevel(): string | undefined {
-    return Utils.objectHasOwnProperty(Configuration.getConfig(), 'logLevel')
-      ? Configuration.getConfig()?.logLevel?.toLowerCase()
-      : 'info';
-  }
-
-  static getLogFile(): string | undefined {
-    return Utils.objectHasOwnProperty(Configuration.getConfig(), 'logFile')
-      ? Configuration.getConfig()?.logFile
-      : 'combined.log';
-  }
-
-  static getLogErrorFile(): string | undefined {
     Configuration.warnDeprecatedConfigurationKey(
-      'errorFile',
+      'workerPoolMinSize',
       undefined,
-      "Use 'logErrorFile' instead"
+      `Use '${ConfigurationSection.worker}' section to define the worker pool minimum size instead`,
     );
-    return Utils.objectHasOwnProperty(Configuration.getConfig(), 'logErrorFile')
-      ? Configuration.getConfig()?.logErrorFile
-      : 'error.log';
-  }
-
-  static getSupervisionUrls(): string | string[] | undefined {
     Configuration.warnDeprecatedConfigurationKey(
-      'supervisionURLs',
+      'workerPoolSize;',
       undefined,
-      "Use 'supervisionUrls' instead"
+      `Use '${ConfigurationSection.worker}' section to define the worker pool maximum size instead`,
     );
-    !Utils.isUndefined(Configuration.getConfig()['supervisionURLs']) &&
-      (Configuration.getConfig().supervisionUrls = Configuration.getConfig()['supervisionURLs'] as
-        | string
-        | string[]);
-    // Read conf
-    return Configuration.getConfig()?.supervisionUrls;
-  }
-
-  static getSupervisionUrlDistribution(): SupervisionUrlDistribution | undefined {
     Configuration.warnDeprecatedConfigurationKey(
-      'distributeStationToTenantEqually',
+      'workerPoolMaxSize;',
       undefined,
-      "Use 'supervisionUrlDistribution' instead"
+      `Use '${ConfigurationSection.worker}' section to define the worker pool maximum size instead`,
     );
     Configuration.warnDeprecatedConfigurationKey(
-      'distributeStationsToTenantsEqually',
+      'workerPoolStrategy;',
       undefined,
-      "Use 'supervisionUrlDistribution' instead"
+      `Use '${ConfigurationSection.worker}' section to define the worker pool strategy instead`,
     );
-    return Utils.objectHasOwnProperty(Configuration.getConfig(), 'supervisionUrlDistribution')
-      ? Configuration.getConfig()?.supervisionUrlDistribution
-      : SupervisionUrlDistribution.ROUND_ROBIN;
+    const defaultWorkerConfiguration: WorkerConfiguration = {
+      processType: WorkerProcessType.workerSet,
+      startDelay: WorkerConstants.DEFAULT_WORKER_START_DELAY,
+      elementsPerWorker: 'auto',
+      elementStartDelay: WorkerConstants.DEFAULT_ELEMENT_START_DELAY,
+      poolMinSize: WorkerConstants.DEFAULT_POOL_MIN_SIZE,
+      poolMaxSize: WorkerConstants.DEFAULT_POOL_MAX_SIZE,
+    };
+    hasOwnProp(Configuration.getConfigurationData(), 'workerPoolStrategy') &&
+      delete Configuration.getConfigurationData()?.workerPoolStrategy;
+    const deprecatedWorkerConfiguration: WorkerConfiguration = {
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'workerProcess') && {
+        processType: Configuration.getConfigurationData()?.workerProcess,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'workerStartDelay') && {
+        startDelay: Configuration.getConfigurationData()?.workerStartDelay,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'chargingStationsPerWorker') && {
+        elementsPerWorker: Configuration.getConfigurationData()?.chargingStationsPerWorker,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'elementStartDelay') && {
+        elementStartDelay: Configuration.getConfigurationData()?.elementStartDelay,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'workerPoolMinSize') && {
+        poolMinSize: Configuration.getConfigurationData()?.workerPoolMinSize,
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'workerPoolMaxSize') && {
+        poolMaxSize: Configuration.getConfigurationData()?.workerPoolMaxSize,
+      }),
+    };
+    Configuration.warnDeprecatedConfigurationKey(
+      'poolStrategy',
+      ConfigurationSection.worker,
+      'Not publicly exposed to end users',
+    );
+    const workerConfiguration: WorkerConfiguration = {
+      ...defaultWorkerConfiguration,
+      ...deprecatedWorkerConfiguration,
+      ...(hasOwnProp(Configuration.getConfigurationData(), ConfigurationSection.worker) &&
+        Configuration.getConfigurationData()?.worker),
+    };
+    if (!Object.values(WorkerProcessType).includes(workerConfiguration.processType!)) {
+      throw new SyntaxError(
+        `Invalid worker process type '${workerConfiguration.processType}' defined in configuration`,
+      );
+    }
+    return workerConfiguration;
   }
 
   private static logPrefix = (): string => {
@@ -313,57 +433,62 @@ export class Configuration {
   private static warnDeprecatedConfigurationKey(
     key: string,
     sectionName?: string,
-    logMsgToAppend = ''
+    logMsgToAppend = '',
   ) {
     if (
       sectionName &&
-      !Utils.isUndefined(Configuration.getConfig()[sectionName]) &&
-      !Utils.isUndefined((Configuration.getConfig()[sectionName] as Record<string, unknown>)[key])
+      !isUndefined(Configuration.getConfigurationData()![sectionName]) &&
+      !isUndefined(
+        (Configuration.getConfigurationData()![sectionName] as Record<string, unknown>)[key],
+      )
     ) {
       console.error(
-        chalk`{green ${Configuration.logPrefix()}} {red Deprecated configuration key '${key}' usage in section '${sectionName}'${
-          logMsgToAppend.trim().length > 0 && `. ${logMsgToAppend}`
-        }}`
+        `${chalk.green(Configuration.logPrefix())} ${chalk.red(
+          `Deprecated configuration key '${key}' usage in section '${sectionName}'${
+            logMsgToAppend.trim().length > 0 ? `. ${logMsgToAppend}` : ''
+          }`,
+        )}`,
       );
-    } else if (!Utils.isUndefined(Configuration.getConfig()[key])) {
+    } else if (!isUndefined(Configuration.getConfigurationData()![key])) {
       console.error(
-        chalk`{green ${Configuration.logPrefix()}} {red Deprecated configuration key '${key}' usage${
-          logMsgToAppend.trim().length > 0 && `. ${logMsgToAppend}`
-        }}`
+        `${chalk.green(Configuration.logPrefix())} ${chalk.red(
+          `Deprecated configuration key '${key}' usage${
+            logMsgToAppend.trim().length > 0 ? `. ${logMsgToAppend}` : ''
+          }`,
+        )}`,
       );
     }
   }
 
-  // Read the config file
-  private static getConfig(): ConfigurationData | null {
-    if (!Configuration.configuration) {
+  private static getConfigurationData(): ConfigurationData | null {
+    if (!Configuration.configurationData) {
       try {
-        Configuration.configuration = JSON.parse(
-          fs.readFileSync(Configuration.configurationFile, 'utf8')
+        Configuration.configurationData = JSON.parse(
+          readFileSync(Configuration.configurationFile, 'utf8'),
         ) as ConfigurationData;
       } catch (error) {
-        FileUtils.handleFileException(
+        Configuration.handleFileException(
           Configuration.configurationFile,
           FileType.Configuration,
           error as NodeJS.ErrnoException,
           Configuration.logPrefix(),
-          { consoleOut: true }
         );
       }
       if (!Configuration.configurationFileWatcher) {
         Configuration.configurationFileWatcher = Configuration.getConfigurationFileWatcher();
       }
     }
-    return Configuration.configuration;
+    return Configuration.configurationData;
   }
 
-  private static getConfigurationFileWatcher(): fs.FSWatcher | undefined {
+  private static getConfigurationFileWatcher(): FSWatcher | undefined {
     try {
-      return fs.watch(Configuration.configurationFile, (event, filename): void => {
-        if (filename?.trim().length > 0 && event === 'change') {
+      return watch(Configuration.configurationFile, (event, filename): void => {
+        if (filename!.trim()!.length > 0 && event === 'change') {
           // Nullify to force configuration file reading
-          Configuration.configuration = null;
-          if (!Utils.isUndefined(Configuration.configurationChangeCallback)) {
+          Configuration.configurationData = null;
+          Configuration.configurationSectionCache.clear();
+          if (!isUndefined(Configuration.configurationChangeCallback)) {
             Configuration.configurationChangeCallback().catch((error) => {
               throw typeof error === 'string' ? new Error(error) : error;
             });
@@ -371,30 +496,59 @@ export class Configuration {
         }
       });
     } catch (error) {
-      FileUtils.handleFileException(
+      Configuration.handleFileException(
         Configuration.configurationFile,
         FileType.Configuration,
         error as NodeJS.ErrnoException,
         Configuration.logPrefix(),
-        { consoleOut: true }
       );
     }
   }
 
+  private static handleFileException(
+    file: string,
+    fileType: FileType,
+    error: NodeJS.ErrnoException,
+    logPrefix: string,
+  ): void {
+    const prefix = isNotEmptyString(logPrefix) ? `${logPrefix} ` : '';
+    let logMsg: string;
+    switch (error.code) {
+      case 'ENOENT':
+        logMsg = `${fileType} file ${file} not found:`;
+        break;
+      case 'EEXIST':
+        logMsg = `${fileType} file ${file} already exists:`;
+        break;
+      case 'EACCES':
+        logMsg = `${fileType} file ${file} access denied:`;
+        break;
+      case 'EPERM':
+        logMsg = `${fileType} file ${file} permission denied:`;
+        break;
+      default:
+        logMsg = `${fileType} file ${file} error:`;
+    }
+    console.error(`${chalk.green(prefix)}${chalk.red(`${logMsg} `)}`, error);
+    throw error;
+  }
+
   private static getDefaultPerformanceStorageUri(storageType: StorageType) {
     switch (storageType) {
       case StorageType.JSON_FILE:
-        return `file://${path.join(
-          path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../../'),
-          Constants.DEFAULT_PERFORMANCE_RECORDS_FILENAME
-        )}`;
+        return Configuration.buildPerformanceUriFilePath(
+          `${Constants.DEFAULT_PERFORMANCE_DIRECTORY}/${Constants.DEFAULT_PERFORMANCE_RECORDS_FILENAME}`,
+        );
       case StorageType.SQLITE:
-        return `file://${path.join(
-          path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../../'),
-          `${Constants.DEFAULT_PERFORMANCE_RECORDS_DB_NAME}.db`
-        )}`;
+        return Configuration.buildPerformanceUriFilePath(
+          `${Constants.DEFAULT_PERFORMANCE_DIRECTORY}/${Constants.DEFAULT_PERFORMANCE_RECORDS_DB_NAME}.db`,
+        );
       default:
         throw new Error(`Performance storage URI is mandatory with storage type '${storageType}'`);
     }
   }
+
+  private static buildPerformanceUriFilePath(file: string) {
+    return `file://${join(resolve(dirname(fileURLToPath(import.meta.url)), '../'), file)}`;
+  }
 }