X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Futils%2FConfiguration.ts;h=25a1475bc2a5f6ec9a6ea40df049048db9538ad8;hb=8f8f87c4fd9a0863d0aeb4a9a8671d1a2b4308e0;hp=1f370480d4d1b6fc47828792ccbf8271cfb81724;hpb=1f8f633225a3594f1a7a31f76dd711f507eda145;p=e-mobility-charging-stations-simulator.git

diff --git a/src/utils/Configuration.ts b/src/utils/Configuration.ts
index 1f370480..25a1475b 100644
--- a/src/utils/Configuration.ts
+++ b/src/utils/Configuration.ts
@@ -1,22 +1,14 @@
-import { type FSWatcher, readFileSync, watch } from 'node:fs';
-import { dirname, join, resolve } from 'node:path';
-import { env } from 'node:process';
-import { fileURLToPath } from 'node:url';
+import { type FSWatcher, readFileSync, watch } from 'node:fs'
+import { dirname, join } from 'node:path'
+import { env } from 'node:process'
+import { fileURLToPath } from 'node:url'
 
-import chalk from 'chalk';
-import merge from 'just-merge';
+import chalk from 'chalk'
+import { mergeDeepRight, once } from 'rambda'
 
-import { Constants } from './Constants';
-import {
-  hasOwnProp,
-  isCFEnvironment,
-  isNotEmptyString,
-  isUndefined,
-  logPrefix,
-  once,
-} from './Utils';
 import {
   ApplicationProtocol,
+  ApplicationProtocolVersion,
   type ConfigurationData,
   ConfigurationSection,
   FileType,
@@ -26,182 +18,208 @@ import {
   StorageType,
   SupervisionUrlDistribution,
   type UIServerConfiguration,
-  type WorkerConfiguration,
-} from '../types';
+  type WorkerConfiguration
+} from '../types/index.js'
 import {
-  DEFAULT_ELEMENT_START_DELAY,
+  DEFAULT_ELEMENT_ADD_DELAY,
   DEFAULT_POOL_MAX_SIZE,
   DEFAULT_POOL_MIN_SIZE,
   DEFAULT_WORKER_START_DELAY,
-  WorkerProcessType,
-} from '../worker';
+  WorkerProcessType
+} from '../worker/index.js'
+import {
+  buildPerformanceUriFilePath,
+  checkWorkerElementsPerWorker,
+  checkWorkerProcessType,
+  getDefaultPerformanceStorageUri,
+  handleFileException,
+  logPrefix
+} from './ConfigurationUtils.js'
+import { Constants } from './Constants.js'
+import { hasOwnProp, isCFEnvironment } from './Utils.js'
 
 type ConfigurationSectionType =
   | LogConfiguration
   | StorageConfiguration
   | WorkerConfiguration
-  | UIServerConfiguration;
-
-// Avoid ESM race condition at class initialization
-const configurationLogPrefix = (): string => {
-  return logPrefix(' Simulator configuration |');
-};
+  | UIServerConfiguration
 
+// eslint-disable-next-line @typescript-eslint/no-extraneous-class
 export class Configuration {
-  public static configurationChangeCallback: () => Promise<void>;
+  public static configurationChangeCallback?: () => Promise<void>
 
-  private static configurationFile = join(
+  private static readonly configurationFile = join(
     dirname(fileURLToPath(import.meta.url)),
     'assets',
-    'config.json',
-  );
+    'config.json'
+  )
 
-  private static configurationFileReloading = false;
-  private static configurationData?: ConfigurationData;
-  private static configurationFileWatcher?: FSWatcher;
-  private static configurationSectionCache = new Map<
-    ConfigurationSection,
-    ConfigurationSectionType
+  private static configurationFileReloading = false
+  private static configurationData?: ConfigurationData
+  private static configurationFileWatcher?: FSWatcher
+  private static readonly configurationSectionCache = new Map<
+  ConfigurationSection,
+  ConfigurationSectionType
   >([
     [ConfigurationSection.log, Configuration.buildLogSection()],
     [ConfigurationSection.performanceStorage, Configuration.buildPerformanceStorageSection()],
     [ConfigurationSection.worker, Configuration.buildWorkerSection()],
-    [ConfigurationSection.uiServer, Configuration.buildUIServerSection()],
-  ]);
+    [ConfigurationSection.uiServer, Configuration.buildUIServerSection()]
+  ])
 
-  private constructor() {
+  private constructor () {
     // This is intentional
   }
 
   public static getConfigurationSection<T extends ConfigurationSectionType>(
-    sectionName: ConfigurationSection,
+    sectionName: ConfigurationSection
   ): T {
     if (!Configuration.isConfigurationSectionCached(sectionName)) {
-      Configuration.cacheConfigurationSection(sectionName);
+      Configuration.cacheConfigurationSection(sectionName)
     }
-    return Configuration.configurationSectionCache.get(sectionName) as T;
+    return Configuration.configurationSectionCache.get(sectionName) as T
   }
 
-  public static getStationTemplateUrls(): StationTemplateUrl[] | undefined {
+  public static getStationTemplateUrls (): StationTemplateUrl[] | undefined {
     const checkDeprecatedConfigurationKeysOnce = once(
-      Configuration.checkDeprecatedConfigurationKeys.bind(Configuration),
-      Configuration,
-    );
-    checkDeprecatedConfigurationKeysOnce();
-    return Configuration.getConfigurationData()?.stationTemplateUrls;
+      Configuration.checkDeprecatedConfigurationKeys.bind(Configuration)
+    )
+    checkDeprecatedConfigurationKeysOnce()
+    return Configuration.getConfigurationData()?.stationTemplateUrls
   }
 
-  public static getSupervisionUrls(): string | string[] | undefined {
+  public static getSupervisionUrls (): string | string[] | undefined {
     if (
-      !isUndefined(
-        Configuration.getConfigurationData()?.['supervisionURLs' as keyof ConfigurationData],
-      )
+      Configuration.getConfigurationData()?.['supervisionURLs' as keyof ConfigurationData] != null
     ) {
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
       Configuration.getConfigurationData()!.supervisionUrls = Configuration.getConfigurationData()![
         'supervisionURLs' as keyof ConfigurationData
-      ] as string | string[];
+      ] as string | string[]
     }
-    return Configuration.getConfigurationData()?.supervisionUrls;
+    return Configuration.getConfigurationData()?.supervisionUrls
   }
 
-  public static getSupervisionUrlDistribution(): SupervisionUrlDistribution | undefined {
+  public static getSupervisionUrlDistribution (): SupervisionUrlDistribution | undefined {
     return hasOwnProp(Configuration.getConfigurationData(), 'supervisionUrlDistribution')
       ? Configuration.getConfigurationData()?.supervisionUrlDistribution
-      : SupervisionUrlDistribution.ROUND_ROBIN;
+      : SupervisionUrlDistribution.ROUND_ROBIN
   }
 
-  public static workerPoolInUse(): boolean {
+  public static workerPoolInUse (): boolean {
     return [WorkerProcessType.dynamicPool, WorkerProcessType.fixedPool].includes(
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
       Configuration.getConfigurationSection<WorkerConfiguration>(ConfigurationSection.worker)
-        .processType!,
-    );
+        .processType!
+    )
   }
 
-  public static workerDynamicPoolInUse(): boolean {
+  public static workerDynamicPoolInUse (): boolean {
     return (
       Configuration.getConfigurationSection<WorkerConfiguration>(ConfigurationSection.worker)
         .processType === WorkerProcessType.dynamicPool
-    );
+    )
   }
 
-  private static isConfigurationSectionCached(sectionName: ConfigurationSection): boolean {
-    return Configuration.configurationSectionCache.has(sectionName);
+  private static isConfigurationSectionCached (sectionName: ConfigurationSection): boolean {
+    return Configuration.configurationSectionCache.has(sectionName)
   }
 
-  private static cacheConfigurationSection(sectionName: ConfigurationSection): void {
+  private static cacheConfigurationSection (sectionName: ConfigurationSection): void {
     switch (sectionName) {
       case ConfigurationSection.log:
-        Configuration.configurationSectionCache.set(sectionName, Configuration.buildLogSection());
-        break;
+        Configuration.configurationSectionCache.set(sectionName, Configuration.buildLogSection())
+        break
       case ConfigurationSection.performanceStorage:
         Configuration.configurationSectionCache.set(
           sectionName,
-          Configuration.buildPerformanceStorageSection(),
-        );
-        break;
+          Configuration.buildPerformanceStorageSection()
+        )
+        break
       case ConfigurationSection.worker:
-        Configuration.configurationSectionCache.set(
-          sectionName,
-          Configuration.buildWorkerSection(),
-        );
-        break;
+        Configuration.configurationSectionCache.set(sectionName, Configuration.buildWorkerSection())
+        break
       case ConfigurationSection.uiServer:
         Configuration.configurationSectionCache.set(
           sectionName,
-          Configuration.buildUIServerSection(),
-        );
-        break;
+          Configuration.buildUIServerSection()
+        )
+        break
       default:
         // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
-        throw new Error(`Unknown configuration section '${sectionName}'`);
+        throw new Error(`Unknown configuration section '${sectionName}'`)
     }
   }
 
-  private static buildUIServerSection(): UIServerConfiguration {
+  private static buildUIServerSection (): UIServerConfiguration {
     let uiServerConfiguration: UIServerConfiguration = {
       enabled: false,
       type: ApplicationProtocol.WS,
+      version: ApplicationProtocolVersion.VERSION_11,
       options: {
         host: Constants.DEFAULT_UI_SERVER_HOST,
-        port: Constants.DEFAULT_UI_SERVER_PORT,
-      },
-    };
+        port: Constants.DEFAULT_UI_SERVER_PORT
+      }
+    }
     if (hasOwnProp(Configuration.getConfigurationData(), ConfigurationSection.uiServer)) {
-      uiServerConfiguration = merge<UIServerConfiguration>(
+      uiServerConfiguration = mergeDeepRight(
         uiServerConfiguration,
-        Configuration.getConfigurationData()!.uiServer!,
-      );
+        // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+        Configuration.getConfigurationData()!.uiServer!
+      )
     }
-    if (isCFEnvironment() === true) {
-      delete uiServerConfiguration.options?.host;
-      uiServerConfiguration.options!.port = parseInt(env.PORT!);
+    if (isCFEnvironment()) {
+      delete uiServerConfiguration.options?.host
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+      uiServerConfiguration.options!.port = parseInt(env.PORT!)
     }
-    return uiServerConfiguration;
+    return uiServerConfiguration
   }
 
-  private static buildPerformanceStorageSection(): StorageConfiguration {
-    let storageConfiguration: StorageConfiguration = {
-      enabled: false,
-      type: StorageType.JSON_FILE,
-      uri: Configuration.getDefaultPerformanceStorageUri(StorageType.JSON_FILE),
-    };
+  private static buildPerformanceStorageSection (): StorageConfiguration {
+    let storageConfiguration: StorageConfiguration
+    switch (Configuration.getConfigurationData()?.performanceStorage?.type) {
+      case StorageType.SQLITE:
+        storageConfiguration = {
+          enabled: false,
+          type: StorageType.SQLITE,
+          uri: getDefaultPerformanceStorageUri(StorageType.SQLITE)
+        }
+        break
+      case StorageType.JSON_FILE:
+        storageConfiguration = {
+          enabled: false,
+          type: StorageType.JSON_FILE,
+          uri: getDefaultPerformanceStorageUri(StorageType.JSON_FILE)
+        }
+        break
+      case StorageType.NONE:
+      default:
+        storageConfiguration = {
+          enabled: true,
+          type: StorageType.NONE
+        }
+        break
+    }
     if (hasOwnProp(Configuration.getConfigurationData(), ConfigurationSection.performanceStorage)) {
       storageConfiguration = {
         ...storageConfiguration,
         ...Configuration.getConfigurationData()?.performanceStorage,
-        ...(Configuration.getConfigurationData()?.performanceStorage?.type ===
-          StorageType.JSON_FILE &&
-          Configuration.getConfigurationData()?.performanceStorage?.uri && {
-            uri: Configuration.buildPerformanceUriFilePath(
-              new URL(Configuration.getConfigurationData()!.performanceStorage!.uri!).pathname,
-            ),
-          }),
-      };
+        ...((Configuration.getConfigurationData()?.performanceStorage?.type ===
+          StorageType.JSON_FILE ||
+          Configuration.getConfigurationData()?.performanceStorage?.type === StorageType.SQLITE) &&
+          Configuration.getConfigurationData()?.performanceStorage?.uri != null && {
+          uri: buildPerformanceUriFilePath(
+            // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+            new URL(Configuration.getConfigurationData()!.performanceStorage!.uri!).pathname
+          )
+        })
+      }
     }
-    return storageConfiguration;
+    return storageConfiguration
   }
 
-  private static buildLogSection(): LogConfiguration {
+  private static buildLogSection (): LogConfiguration {
     const defaultLogConfiguration: LogConfiguration = {
       enabled: true,
       file: 'logs/combined.log',
@@ -209,425 +227,382 @@ export class Configuration {
       statisticsInterval: Constants.DEFAULT_LOG_STATISTICS_INTERVAL,
       level: 'info',
       format: 'simple',
-      rotate: true,
-    };
+      rotate: true
+    }
     const deprecatedLogConfiguration: LogConfiguration = {
       ...(hasOwnProp(Configuration.getConfigurationData(), 'logEnabled') && {
-        enabled: Configuration.getConfigurationData()?.logEnabled,
+        enabled: Configuration.getConfigurationData()?.logEnabled
       }),
       ...(hasOwnProp(Configuration.getConfigurationData(), 'logFile') && {
-        file: Configuration.getConfigurationData()?.logFile,
+        file: Configuration.getConfigurationData()?.logFile
       }),
       ...(hasOwnProp(Configuration.getConfigurationData(), 'logErrorFile') && {
-        errorFile: Configuration.getConfigurationData()?.logErrorFile,
+        errorFile: Configuration.getConfigurationData()?.logErrorFile
       }),
       ...(hasOwnProp(Configuration.getConfigurationData(), 'logStatisticsInterval') && {
-        statisticsInterval: Configuration.getConfigurationData()?.logStatisticsInterval,
+        statisticsInterval: Configuration.getConfigurationData()?.logStatisticsInterval
       }),
       ...(hasOwnProp(Configuration.getConfigurationData(), 'logLevel') && {
-        level: Configuration.getConfigurationData()?.logLevel,
+        level: Configuration.getConfigurationData()?.logLevel
       }),
       ...(hasOwnProp(Configuration.getConfigurationData(), 'logConsole') && {
-        console: Configuration.getConfigurationData()?.logConsole,
+        console: Configuration.getConfigurationData()?.logConsole
       }),
       ...(hasOwnProp(Configuration.getConfigurationData(), 'logFormat') && {
-        format: Configuration.getConfigurationData()?.logFormat,
+        format: Configuration.getConfigurationData()?.logFormat
       }),
       ...(hasOwnProp(Configuration.getConfigurationData(), 'logRotate') && {
-        rotate: Configuration.getConfigurationData()?.logRotate,
+        rotate: Configuration.getConfigurationData()?.logRotate
       }),
       ...(hasOwnProp(Configuration.getConfigurationData(), 'logMaxFiles') && {
-        maxFiles: Configuration.getConfigurationData()?.logMaxFiles,
+        maxFiles: Configuration.getConfigurationData()?.logMaxFiles
       }),
       ...(hasOwnProp(Configuration.getConfigurationData(), 'logMaxSize') && {
-        maxSize: Configuration.getConfigurationData()?.logMaxSize,
-      }),
-    };
+        maxSize: Configuration.getConfigurationData()?.logMaxSize
+      })
+    }
     const logConfiguration: LogConfiguration = {
       ...defaultLogConfiguration,
       ...deprecatedLogConfiguration,
       ...(hasOwnProp(Configuration.getConfigurationData(), ConfigurationSection.log) &&
-        Configuration.getConfigurationData()?.log),
-    };
-    return logConfiguration;
+        Configuration.getConfigurationData()?.log)
+    }
+    return logConfiguration
   }
 
-  private static buildWorkerSection(): WorkerConfiguration {
+  private static buildWorkerSection (): WorkerConfiguration {
     const defaultWorkerConfiguration: WorkerConfiguration = {
       processType: WorkerProcessType.workerSet,
       startDelay: DEFAULT_WORKER_START_DELAY,
       elementsPerWorker: 'auto',
-      elementStartDelay: DEFAULT_ELEMENT_START_DELAY,
+      elementAddDelay: DEFAULT_ELEMENT_ADD_DELAY,
       poolMinSize: DEFAULT_POOL_MIN_SIZE,
-      poolMaxSize: DEFAULT_POOL_MAX_SIZE,
-    };
+      poolMaxSize: DEFAULT_POOL_MAX_SIZE
+    }
+
     const deprecatedWorkerConfiguration: WorkerConfiguration = {
       ...(hasOwnProp(Configuration.getConfigurationData(), 'workerProcess') && {
-        processType: Configuration.getConfigurationData()?.workerProcess,
+        processType: Configuration.getConfigurationData()?.workerProcess
       }),
       ...(hasOwnProp(Configuration.getConfigurationData(), 'workerStartDelay') && {
-        startDelay: Configuration.getConfigurationData()?.workerStartDelay,
+        startDelay: Configuration.getConfigurationData()?.workerStartDelay
       }),
       ...(hasOwnProp(Configuration.getConfigurationData(), 'chargingStationsPerWorker') && {
-        elementsPerWorker: Configuration.getConfigurationData()?.chargingStationsPerWorker,
+        elementsPerWorker: Configuration.getConfigurationData()?.chargingStationsPerWorker
       }),
-      ...(hasOwnProp(Configuration.getConfigurationData(), 'elementStartDelay') && {
-        elementStartDelay: Configuration.getConfigurationData()?.elementStartDelay,
+      ...(hasOwnProp(Configuration.getConfigurationData(), 'elementAddDelay') && {
+        elementAddDelay: Configuration.getConfigurationData()?.elementAddDelay
+      }),
+      ...(hasOwnProp(Configuration.getConfigurationData()?.worker, 'elementStartDelay') && {
+        elementAddDelay: Configuration.getConfigurationData()?.worker?.elementStartDelay
       }),
       ...(hasOwnProp(Configuration.getConfigurationData(), 'workerPoolMinSize') && {
-        poolMinSize: Configuration.getConfigurationData()?.workerPoolMinSize,
+        poolMinSize: Configuration.getConfigurationData()?.workerPoolMinSize
       }),
       ...(hasOwnProp(Configuration.getConfigurationData(), 'workerPoolMaxSize') && {
-        poolMaxSize: Configuration.getConfigurationData()?.workerPoolMaxSize,
-      }),
-    };
+        poolMaxSize: Configuration.getConfigurationData()?.workerPoolMaxSize
+      })
+    }
     hasOwnProp(Configuration.getConfigurationData(), 'workerPoolStrategy') &&
-      delete Configuration.getConfigurationData()?.workerPoolStrategy;
+      delete Configuration.getConfigurationData()?.workerPoolStrategy
     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`,
-      );
+        Configuration.getConfigurationData()?.worker)
     }
-    return workerConfiguration;
+    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+    checkWorkerProcessType(workerConfiguration.processType!)
+    checkWorkerElementsPerWorker(workerConfiguration.elementsPerWorker)
+    return workerConfiguration
   }
 
-  private static checkDeprecatedConfigurationKeys() {
+  private static checkDeprecatedConfigurationKeys (): void {
     // connection timeout
     Configuration.warnDeprecatedConfigurationKey(
       'autoReconnectTimeout',
       undefined,
-      "Use 'ConnectionTimeOut' OCPP parameter in charging station template instead",
-    );
+      "Use 'ConnectionTimeOut' OCPP parameter in charging station template instead"
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'connectionTimeout',
       undefined,
-      "Use 'ConnectionTimeOut' OCPP parameter in charging station template instead",
-    );
+      "Use 'ConnectionTimeOut' OCPP parameter in charging station template instead"
+    )
     // connection retries
     Configuration.warnDeprecatedConfigurationKey(
       'autoReconnectMaxRetries',
       undefined,
-      'Use it in charging station template instead',
-    );
+      'Use it in charging station template instead'
+    )
     // station template url(s)
     Configuration.warnDeprecatedConfigurationKey(
       'stationTemplateURLs',
       undefined,
-      "Use 'stationTemplateUrls' instead",
-    );
-    !isUndefined(
-      Configuration.getConfigurationData()?.['stationTemplateURLs' as keyof ConfigurationData],
-    ) &&
+      "Use 'stationTemplateUrls' instead"
+    )
+    Configuration.getConfigurationData()?.['stationTemplateURLs' as keyof ConfigurationData] !=
+      null &&
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
       (Configuration.getConfigurationData()!.stationTemplateUrls =
+        // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
         Configuration.getConfigurationData()![
           'stationTemplateURLs' as keyof ConfigurationData
-        ] as StationTemplateUrl[]);
+        ] as StationTemplateUrl[])
     Configuration.getConfigurationData()?.stationTemplateUrls.forEach(
       (stationTemplateUrl: StationTemplateUrl) => {
-        if (!isUndefined(stationTemplateUrl?.['numberOfStation' as keyof StationTemplateUrl])) {
+        // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+        if (stationTemplateUrl['numberOfStation' as keyof StationTemplateUrl] != null) {
           console.error(
-            `${chalk.green(configurationLogPrefix())} ${chalk.red(
-              `Deprecated configuration key 'numberOfStation' usage for template file '${stationTemplateUrl.file}' in 'stationTemplateUrls'. Use 'numberOfStations' instead`,
-            )}`,
-          );
+            `${chalk.green(logPrefix())} ${chalk.red(
+              `Deprecated configuration key 'numberOfStation' usage for template file '${stationTemplateUrl.file}' in 'stationTemplateUrls'. Use 'numberOfStations' instead`
+            )}`
+          )
         }
-      },
-    );
+      }
+    )
     // supervision url(s)
     Configuration.warnDeprecatedConfigurationKey(
       'supervisionURLs',
       undefined,
-      "Use 'supervisionUrls' instead",
-    );
+      "Use 'supervisionUrls' instead"
+    )
     // supervision urls distribution
     Configuration.warnDeprecatedConfigurationKey(
       'distributeStationToTenantEqually',
       undefined,
-      "Use 'supervisionUrlDistribution' instead",
-    );
+      "Use 'supervisionUrlDistribution' instead"
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'distributeStationsToTenantsEqually',
       undefined,
-      "Use 'supervisionUrlDistribution' instead",
-    );
+      "Use 'supervisionUrlDistribution' instead"
+    )
     // worker section
     Configuration.warnDeprecatedConfigurationKey(
       'useWorkerPool',
       undefined,
-      `Use '${ConfigurationSection.worker}' section to define the type of worker process model instead`,
-    );
+      `Use '${ConfigurationSection.worker}' section to define the type of worker process model instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'workerProcess',
       undefined,
-      `Use '${ConfigurationSection.worker}' section to define the type of worker process model instead`,
-    );
+      `Use '${ConfigurationSection.worker}' section to define the type of worker process model instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'workerStartDelay',
       undefined,
-      `Use '${ConfigurationSection.worker}' section to define the worker start delay instead`,
-    );
+      `Use '${ConfigurationSection.worker}' section to define the worker start delay instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'chargingStationsPerWorker',
       undefined,
-      `Use '${ConfigurationSection.worker}' section to define the number of element(s) per worker instead`,
-    );
+      `Use '${ConfigurationSection.worker}' section to define the number of element(s) per worker instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
-      'elementStartDelay',
+      'elementAddDelay',
       undefined,
-      `Use '${ConfigurationSection.worker}' section to define the worker's element start delay instead`,
-    );
+      `Use '${ConfigurationSection.worker}' section to define the worker's element add delay instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'workerPoolMinSize',
       undefined,
-      `Use '${ConfigurationSection.worker}' section to define the worker pool minimum size instead`,
-    );
+      `Use '${ConfigurationSection.worker}' section to define the worker pool minimum size instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'workerPoolSize',
       undefined,
-      `Use '${ConfigurationSection.worker}' section to define the worker pool maximum size instead`,
-    );
+      `Use '${ConfigurationSection.worker}' section to define the worker pool maximum size instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'workerPoolMaxSize',
       undefined,
-      `Use '${ConfigurationSection.worker}' section to define the worker pool maximum size instead`,
-    );
+      `Use '${ConfigurationSection.worker}' section to define the worker pool maximum size instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'workerPoolStrategy',
       undefined,
-      `Use '${ConfigurationSection.worker}' section to define the worker pool strategy instead`,
-    );
+      `Use '${ConfigurationSection.worker}' section to define the worker pool strategy instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'poolStrategy',
       ConfigurationSection.worker,
-      'Not publicly exposed to end users',
-    );
+      'Not publicly exposed to end users'
+    )
+    Configuration.warnDeprecatedConfigurationKey(
+      'elementStartDelay',
+      ConfigurationSection.worker,
+      "Use 'elementAddDelay' instead"
+    )
     if (
       Configuration.getConfigurationData()?.worker?.processType ===
       ('staticPool' as WorkerProcessType)
     ) {
       console.error(
-        `${chalk.green(configurationLogPrefix())} ${chalk.red(
-          `Deprecated configuration 'staticPool' value usage in worker section 'processType' field. Use '${WorkerProcessType.fixedPool}' value instead`,
-        )}`,
-      );
+        `${chalk.green(logPrefix())} ${chalk.red(
+          `Deprecated configuration 'staticPool' value usage in worker section 'processType' field. Use '${WorkerProcessType.fixedPool}' value instead`
+        )}`
+      )
     }
     // log section
     Configuration.warnDeprecatedConfigurationKey(
       'logEnabled',
       undefined,
-      `Use '${ConfigurationSection.log}' section to define the logging enablement instead`,
-    );
+      `Use '${ConfigurationSection.log}' section to define the logging enablement instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'logFile',
       undefined,
-      `Use '${ConfigurationSection.log}' section to define the log file instead`,
-    );
+      `Use '${ConfigurationSection.log}' section to define the log file instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'logErrorFile',
       undefined,
-      `Use '${ConfigurationSection.log}' section to define the log error file instead`,
-    );
+      `Use '${ConfigurationSection.log}' section to define the log error file instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'logConsole',
       undefined,
-      `Use '${ConfigurationSection.log}' section to define the console logging enablement instead`,
-    );
+      `Use '${ConfigurationSection.log}' section to define the console logging enablement instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'logStatisticsInterval',
       undefined,
-      `Use '${ConfigurationSection.log}' section to define the log statistics interval instead`,
-    );
+      `Use '${ConfigurationSection.log}' section to define the log statistics interval instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'logLevel',
       undefined,
-      `Use '${ConfigurationSection.log}' section to define the log level instead`,
-    );
+      `Use '${ConfigurationSection.log}' section to define the log level instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'logFormat',
       undefined,
-      `Use '${ConfigurationSection.log}' section to define the log format instead`,
-    );
+      `Use '${ConfigurationSection.log}' section to define the log format instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'logRotate',
       undefined,
-      `Use '${ConfigurationSection.log}' section to define the log rotation enablement instead`,
-    );
+      `Use '${ConfigurationSection.log}' section to define the log rotation enablement instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'logMaxFiles',
       undefined,
-      `Use '${ConfigurationSection.log}' section to define the log maximum files instead`,
-    );
+      `Use '${ConfigurationSection.log}' section to define the log maximum files instead`
+    )
     Configuration.warnDeprecatedConfigurationKey(
       'logMaxSize',
       undefined,
-      `Use '${ConfigurationSection.log}' section to define the log maximum size instead`,
-    );
+      `Use '${ConfigurationSection.log}' section to define the log maximum size instead`
+    )
     // performanceStorage section
     Configuration.warnDeprecatedConfigurationKey(
       'URI',
       ConfigurationSection.performanceStorage,
-      "Use 'uri' instead",
-    );
+      "Use 'uri' instead"
+    )
     // uiServer section
     if (hasOwnProp(Configuration.getConfigurationData(), 'uiWebSocketServer')) {
       console.error(
-        `${chalk.green(configurationLogPrefix())} ${chalk.red(
-          `Deprecated configuration section 'uiWebSocketServer' usage. Use '${ConfigurationSection.uiServer}' instead`,
-        )}`,
-      );
+        `${chalk.green(logPrefix())} ${chalk.red(
+          `Deprecated configuration section 'uiWebSocketServer' usage. Use '${ConfigurationSection.uiServer}' instead`
+        )}`
+      )
     }
   }
 
-  private static warnDeprecatedConfigurationKey(
+  private static warnDeprecatedConfigurationKey (
     key: string,
-    sectionName?: string,
-    logMsgToAppend = '',
-  ) {
+    configurationSection?: ConfigurationSection,
+    logMsgToAppend = ''
+  ): void {
     if (
-      sectionName &&
-      !isUndefined(
-        Configuration.getConfigurationData()?.[sectionName as keyof ConfigurationData],
-      ) &&
-      !isUndefined(
-        (
-          Configuration.getConfigurationData()?.[sectionName as keyof ConfigurationData] as Record<
-            string,
-            unknown
-          >
-        )?.[key],
-      )
+      configurationSection != null &&
+      Configuration.getConfigurationData()?.[configurationSection as keyof ConfigurationData] !=
+        null &&
+      (
+        Configuration.getConfigurationData()?.[
+          configurationSection as keyof ConfigurationData
+        ] as Record<string, unknown>
+      )[key] != null
     ) {
       console.error(
-        `${chalk.green(configurationLogPrefix())} ${chalk.red(
-          `Deprecated configuration key '${key}' usage in section '${sectionName}'${
+        `${chalk.green(logPrefix())} ${chalk.red(
+          `Deprecated configuration key '${key}' usage in section '${configurationSection}'${
             logMsgToAppend.trim().length > 0 ? `. ${logMsgToAppend}` : ''
-          }`,
-        )}`,
-      );
-    } else if (
-      !isUndefined(Configuration.getConfigurationData()?.[key as keyof ConfigurationData])
-    ) {
+          }`
+        )}`
+      )
+    } else if (Configuration.getConfigurationData()?.[key as keyof ConfigurationData] != null) {
       console.error(
-        `${chalk.green(configurationLogPrefix())} ${chalk.red(
+        `${chalk.green(logPrefix())} ${chalk.red(
           `Deprecated configuration key '${key}' usage${
             logMsgToAppend.trim().length > 0 ? `. ${logMsgToAppend}` : ''
-          }`,
-        )}`,
-      );
+          }`
+        )}`
+      )
     }
   }
 
-  private static getConfigurationData(): ConfigurationData | undefined {
-    if (!Configuration.configurationData) {
+  public static getConfigurationData (): ConfigurationData | undefined {
+    if (Configuration.configurationData == null) {
       try {
         Configuration.configurationData = JSON.parse(
-          readFileSync(Configuration.configurationFile, 'utf8'),
-        ) as ConfigurationData;
-        if (!Configuration.configurationFileWatcher) {
-          Configuration.configurationFileWatcher = Configuration.getConfigurationFileWatcher();
+          readFileSync(Configuration.configurationFile, 'utf8')
+        ) as ConfigurationData
+        if (Configuration.configurationFileWatcher == null) {
+          Configuration.configurationFileWatcher = Configuration.getConfigurationFileWatcher()
         }
       } catch (error) {
-        Configuration.handleFileException(
+        handleFileException(
           Configuration.configurationFile,
           FileType.Configuration,
           error as NodeJS.ErrnoException,
-          configurationLogPrefix(),
-        );
+          logPrefix()
+        )
       }
     }
-    return Configuration.configurationData;
+    return Configuration.configurationData
   }
 
-  private static getConfigurationFileWatcher(): FSWatcher | undefined {
+  private static getConfigurationFileWatcher (): FSWatcher | undefined {
     try {
       return watch(Configuration.configurationFile, (event, filename): void => {
         if (
           !Configuration.configurationFileReloading &&
-          filename!.trim()!.length > 0 &&
+          // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+          filename!.trim().length > 0 &&
           event === 'change'
         ) {
-          Configuration.configurationFileReloading = true;
-          const consoleWarnOnce = once(console.warn, this);
+          Configuration.configurationFileReloading = true
+          const consoleWarnOnce = once(console.warn)
           consoleWarnOnce(
-            `${chalk.green(configurationLogPrefix())} ${chalk.yellow(
-              `${FileType.Configuration} ${this.configurationFile} file have changed, reload`,
-            )}`,
-          );
-          delete Configuration.configurationData;
-          Configuration.configurationSectionCache.clear();
-          if (!isUndefined(Configuration.configurationChangeCallback)) {
+            `${chalk.green(logPrefix())} ${chalk.yellow(
+              `${FileType.Configuration} ${this.configurationFile} file have changed, reload`
+            )}`
+          )
+          delete Configuration.configurationData
+          Configuration.configurationSectionCache.clear()
+          if (Configuration.configurationChangeCallback != null) {
             Configuration.configurationChangeCallback()
-              .catch((error) => {
-                throw typeof error === 'string' ? new Error(error) : error;
+              .catch((error: unknown) => {
+                throw typeof error === 'string' ? new Error(error) : error
               })
               .finally(() => {
-                Configuration.configurationFileReloading = false;
-              });
+                Configuration.configurationFileReloading = false
+              })
           } else {
-            Configuration.configurationFileReloading = false;
+            Configuration.configurationFileReloading = false
           }
         }
-      });
+      })
     } catch (error) {
-      Configuration.handleFileException(
+      handleFileException(
         Configuration.configurationFile,
         FileType.Configuration,
         error as NodeJS.ErrnoException,
-        configurationLogPrefix(),
-      );
-    }
-  }
-
-  private static handleFileException(
-    file: string,
-    fileType: FileType,
-    error: NodeJS.ErrnoException,
-    logPfx: string,
-  ): void {
-    const prefix = isNotEmptyString(logPfx) ? `${logPfx} ` : '';
-    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)}${chalk.red(logMsg)}`, error);
-    throw error;
-  }
-
-  private static getDefaultPerformanceStorageUri(storageType: StorageType) {
-    switch (storageType) {
-      case StorageType.JSON_FILE:
-        return Configuration.buildPerformanceUriFilePath(
-          `${Constants.DEFAULT_PERFORMANCE_DIRECTORY}/${Constants.DEFAULT_PERFORMANCE_RECORDS_FILENAME}`,
-        );
-      case StorageType.SQLITE:
-        return Configuration.buildPerformanceUriFilePath(
-          `${Constants.DEFAULT_PERFORMANCE_DIRECTORY}/${Constants.DEFAULT_PERFORMANCE_RECORDS_DB_NAME}.db`,
-        );
-      default:
-        throw new Error(`Unsupported storage type '${storageType}'`);
+        logPrefix()
+      )
     }
   }
-
-  private static buildPerformanceUriFilePath(file: string) {
-    return `file://${join(resolve(dirname(fileURLToPath(import.meta.url)), '../'), file)}`;
-  }
 }