import { EventEmitter } from 'node:events';
import { dirname, extname, join } from 'node:path';
+import process, { exit } from 'node:process';
import { fileURLToPath } from 'node:url';
-import { isMainThread } from 'node:worker_threads';
import chalk from 'chalk';
import { availableParallelism } from 'poolifier';
-import { waitChargingStationEvents } from './ChargingStationUtils';
+import { waitChargingStationEvents } from './Helpers';
import type { AbstractUIServer } from './ui-server/AbstractUIServer';
import { UIServerFactory } from './ui-server/UIServerFactory';
-import { version } from '../../package.json' assert { type: 'json' };
+import { version } from '../../package.json';
import { BaseError } from '../exception';
import { type Storage, StorageFactory } from '../performance';
import {
const moduleName = 'Bootstrap';
enum exitCodes {
+ succeeded = 0,
missingChargingStationsConfiguration = 1,
noChargingStationTemplates = 2,
+ gracefulShutdownError = 3,
}
export class Bootstrap extends EventEmitter {
public numberOfChargingStations!: number;
public numberOfChargingStationTemplates!: number;
private workerImplementation: WorkerAbstract<ChargingStationWorkerData> | null;
- private readonly uiServer!: AbstractUIServer | null;
+ private readonly uiServer: AbstractUIServer | null;
private readonly storage!: Storage;
private numberOfStartedChargingStations!: number;
private readonly version: string = version;
private constructor() {
super();
for (const signal of ['SIGINT', 'SIGQUIT', 'SIGTERM']) {
- process.on(signal, this.gracefulShutdown);
+ process.on(signal, this.gracefulShutdown.bind(this));
}
// Enable unconditionally for now
handleUnhandledRejection();
dirname(fileURLToPath(import.meta.url)),
`ChargingStationWorker${extname(fileURLToPath(import.meta.url))}`,
);
- Configuration.getConfigurationSection<UIServerConfiguration>(ConfigurationSection.uiServer)
- .enabled === true &&
- (this.uiServer = UIServerFactory.getUIServerImplementation(
- Configuration.getConfigurationSection<UIServerConfiguration>(ConfigurationSection.uiServer),
- ));
- Configuration.getConfigurationSection<StorageConfiguration>(
- ConfigurationSection.performanceStorage,
- ).enabled === true &&
+ this.uiServer = UIServerFactory.getUIServerImplementation(
+ Configuration.getConfigurationSection<UIServerConfiguration>(ConfigurationSection.uiServer),
+ );
+ const performanceStorageConfiguration =
+ Configuration.getConfigurationSection<StorageConfiguration>(
+ ConfigurationSection.performanceStorage,
+ );
+ performanceStorageConfiguration.enabled === true &&
(this.storage = StorageFactory.getStorage(
- Configuration.getConfigurationSection<StorageConfiguration>(
- ConfigurationSection.performanceStorage,
- ).type!,
- Configuration.getConfigurationSection<StorageConfiguration>(
- ConfigurationSection.performanceStorage,
- ).uri!,
+ performanceStorageConfiguration.type!,
+ performanceStorageConfiguration.uri!,
this.logPrefix(),
));
- Configuration.setConfigurationChangeCallback(async () => Bootstrap.getInstance().restart());
+ Configuration.configurationChangeCallback = async () => Bootstrap.getInstance().restart(false);
}
public static getInstance(): Bootstrap {
}
public async start(): Promise<void> {
- if (!isMainThread) {
- throw new Error('Cannot start charging stations simulator from worker thread');
- }
if (this.started === false) {
if (this.starting === false) {
this.starting = true;
this.initializeCounters();
- this.initializeWorkerImplementation();
+ const workerConfiguration = Configuration.getConfigurationSection<WorkerConfiguration>(
+ ConfigurationSection.worker,
+ );
+ this.initializeWorkerImplementation(workerConfiguration);
await this.workerImplementation?.start();
await this.storage?.open();
- this.uiServer?.start();
+ Configuration.getConfigurationSection<UIServerConfiguration>(ConfigurationSection.uiServer)
+ .enabled === true && this.uiServer?.start();
// Start ChargingStation object instance in worker thread
for (const stationTemplateUrl of Configuration.getStationTemplateUrls()!) {
try {
this.version
} started with ${this.numberOfChargingStations.toString()} charging station(s) from ${this.numberOfChargingStationTemplates.toString()} configured charging station template(s) and ${
Configuration.workerDynamicPoolInUse()
- ? `${Configuration.getConfigurationSection<WorkerConfiguration>(
- ConfigurationSection.worker,
- ).poolMinSize?.toString()}/`
+ ? `${workerConfiguration.poolMinSize?.toString()}/`
: ''
}${this.workerImplementation?.size}${
Configuration.workerPoolInUse()
- ? `/${Configuration.getConfigurationSection<WorkerConfiguration>(
- ConfigurationSection.worker,
- ).poolMaxSize?.toString()}`
+ ? `/${workerConfiguration.poolMaxSize?.toString()}`
: ''
- } worker(s) concurrently running in '${
- Configuration.getConfigurationSection<WorkerConfiguration>(
- ConfigurationSection.worker,
- ).processType
- }' mode${
+ } worker(s) concurrently running in '${workerConfiguration.processType}' mode${
!isNullOrUndefined(this.workerImplementation?.maxElementsPerWorker)
? ` (${this.workerImplementation?.maxElementsPerWorker} charging station(s) per worker)`
: ''
Configuration.workerDynamicPoolInUse() &&
console.warn(
chalk.yellow(
- 'Charging stations simulator is using dynamic pool mode. This is an experimental feature with known issues.\nPlease consider using static pool or worker set mode instead',
+ 'Charging stations simulator is using dynamic pool mode. This is an experimental feature with known issues.\nPlease consider using fixed pool or worker set mode instead',
),
);
console.info(chalk.green('Worker set/pool information:'), this.workerImplementation?.info);
}
}
- public async stop(): Promise<void> {
- if (!isMainThread) {
- throw new Error('Cannot stop charging stations simulator from worker thread');
- }
+ public async stop(stopChargingStations = true): Promise<void> {
if (this.started === true) {
if (this.stopping === false) {
this.stopping = true;
- await this.uiServer?.sendInternalRequest(
- this.uiServer.buildProtocolRequest(
- generateUUID(),
- ProcedureName.STOP_CHARGING_STATION,
- Constants.EMPTY_FREEZED_OBJECT,
- ),
- );
- await Promise.race([
- waitChargingStationEvents(
- this,
- ChargingStationWorkerMessageEvents.stopped,
- this.numberOfChargingStations,
- ),
- new Promise<string>((resolve) => {
- setTimeout(() => {
- const message = `Timeout reached ${formatDurationMilliSeconds(
- Constants.STOP_SIMULATOR_TIMEOUT,
- )} at stopping charging stations simulator`;
- console.warn(chalk.yellow(message));
- resolve(message);
- }, Constants.STOP_SIMULATOR_TIMEOUT);
- }),
- ]);
+ if (stopChargingStations === true) {
+ await this.uiServer?.sendInternalRequest(
+ this.uiServer.buildProtocolRequest(
+ generateUUID(),
+ ProcedureName.STOP_CHARGING_STATION,
+ Constants.EMPTY_FROZEN_OBJECT,
+ ),
+ );
+ await this.waitChargingStationsStopped();
+ }
await this.workerImplementation?.stop();
this.workerImplementation = null;
this.uiServer?.stop();
}
}
- public async restart(): Promise<void> {
- await this.stop();
+ public async restart(stopChargingStations?: boolean): Promise<void> {
+ await this.stop(stopChargingStations);
await this.start();
}
- private initializeWorkerImplementation(): void {
+ private async waitChargingStationsStopped(): Promise<void> {
+ await Promise.race([
+ waitChargingStationEvents(
+ this,
+ ChargingStationWorkerMessageEvents.stopped,
+ this.numberOfChargingStations,
+ ),
+ new Promise<string>((resolve) => {
+ setTimeout(() => {
+ const message = `Timeout ${formatDurationMilliSeconds(
+ Constants.STOP_SIMULATOR_TIMEOUT,
+ )} reached at stopping charging stations simulator`;
+ console.warn(chalk.yellow(message));
+ resolve(message);
+ }, Constants.STOP_SIMULATOR_TIMEOUT);
+ }),
+ ]);
+ }
+
+ private initializeWorkerImplementation(workerConfiguration: WorkerConfiguration): void {
let elementsPerWorker: number | undefined;
- if (
- Configuration.getConfigurationSection<WorkerConfiguration>(ConfigurationSection.worker)
- ?.elementsPerWorker === 'auto'
- ) {
+ if (workerConfiguration?.elementsPerWorker === 'auto') {
elementsPerWorker =
this.numberOfChargingStations > availableParallelism()
- ? Math.round(this.numberOfChargingStations / availableParallelism())
+ ? Math.round(this.numberOfChargingStations / (availableParallelism() * 1.5))
: 1;
}
this.workerImplementation === null &&
(this.workerImplementation = WorkerFactory.getWorkerImplementation<ChargingStationWorkerData>(
this.workerScript,
- Configuration.getConfigurationSection<WorkerConfiguration>(ConfigurationSection.worker)
- .processType!,
+ workerConfiguration.processType!,
{
- workerStartDelay: Configuration.getConfigurationSection<WorkerConfiguration>(
- ConfigurationSection.worker,
- ).startDelay,
- elementStartDelay: Configuration.getConfigurationSection<WorkerConfiguration>(
- ConfigurationSection.worker,
- ).elementStartDelay,
- poolMaxSize: Configuration.getConfigurationSection<WorkerConfiguration>(
- ConfigurationSection.worker,
- ).poolMaxSize!,
- poolMinSize: Configuration.getConfigurationSection<WorkerConfiguration>(
- ConfigurationSection.worker,
- ).poolMinSize!,
- elementsPerWorker:
- elementsPerWorker ??
- (Configuration.getConfigurationSection<WorkerConfiguration>(ConfigurationSection.worker)
- .elementsPerWorker as number),
+ workerStartDelay: workerConfiguration.startDelay,
+ elementStartDelay: workerConfiguration.elementStartDelay,
+ poolMaxSize: workerConfiguration.poolMaxSize!,
+ poolMinSize: workerConfiguration.poolMinSize!,
+ elementsPerWorker: elementsPerWorker ?? (workerConfiguration.elementsPerWorker as number),
poolOptions: {
messageHandler: this.messageHandler.bind(this) as (message: unknown) => void,
},
// logger.debug(
// `${this.logPrefix()} ${moduleName}.messageHandler: Worker channel message received: ${JSON.stringify(
// msg,
- // null,
+ // undefined,
// 2,
// )}`,
// );
try {
- switch (msg.id) {
+ switch (msg.event) {
case ChargingStationWorkerMessageEvents.started:
this.workerEventStarted(msg.data as ChargingStationData);
this.emit(ChargingStationWorkerMessageEvents.started, msg.data as ChargingStationData);
msg.data as Statistics,
);
break;
+ case ChargingStationWorkerMessageEvents.startWorkerElementError:
+ logger.error(
+ `${this.logPrefix()} ${moduleName}.messageHandler: Error occured while starting worker element:`,
+ msg.data,
+ );
+ this.emit(ChargingStationWorkerMessageEvents.startWorkerElementError, msg.data);
+ break;
+ case ChargingStationWorkerMessageEvents.startedWorkerElement:
+ break;
default:
throw new BaseError(
- `Unknown event type: '${msg.id}' for data: ${JSON.stringify(msg.data, null, 2)}`,
+ `Unknown charging station worker event: '${
+ msg.event
+ }' received with data: ${JSON.stringify(msg.data, undefined, 2)}`,
);
}
} catch (error) {
logger.error(
`${this.logPrefix()} ${moduleName}.messageHandler: Error occurred while handling '${
- msg.id
+ msg.event
}' event:`,
error,
);
console.warn(
chalk.yellow("'stationTemplateUrls' not defined or empty in configuration, exiting"),
);
- process.exit(exitCodes.missingChargingStationsConfiguration);
+ exit(exitCodes.missingChargingStationsConfiguration);
}
if (this.numberOfChargingStations === 0) {
console.warn(
chalk.yellow('No charging station template enabled in configuration, exiting'),
);
- process.exit(exitCodes.noChargingStationTemplates);
+ exit(exitCodes.noChargingStationTemplates);
}
this.initializedCounters = true;
}
});
}
- private gracefulShutdown = (): void => {
- console.info(`${chalk.green('Graceful shutdown')}`);
+ private gracefulShutdown(): void {
this.stop()
.then(() => {
- process.exit(0);
+ console.info(`${chalk.green('Graceful shutdown')}`);
+ // stop() asks for charging stations to stop by default
+ this.waitChargingStationsStopped()
+ .then(() => {
+ exit(exitCodes.succeeded);
+ })
+ .catch((error) => {
+ console.error(chalk.red('Error while waiting for charging stations to stop: '), error);
+ exit(exitCodes.gracefulShutdownError);
+ });
})
.catch((error) => {
console.error(chalk.red('Error while shutdowning charging stations simulator: '), error);
- process.exit(1);
+ exit(exitCodes.gracefulShutdownError);
});
- };
+ }
private logPrefix = (): string => {
return logPrefix(' Bootstrap |');