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 './Helpers';
import type { AbstractUIServer } from './ui-server/AbstractUIServer';
import { UIServerFactory } from './ui-server/UIServerFactory';
-import { waitChargingStationEvents } from './Utils';
-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))}`,
);
- const uiServerConfiguration = Configuration.getConfigurationSection<UIServerConfiguration>(
- ConfigurationSection.uiServer,
+ this.uiServer = UIServerFactory.getUIServerImplementation(
+ Configuration.getConfigurationSection<UIServerConfiguration>(ConfigurationSection.uiServer),
);
- uiServerConfiguration.enabled === true &&
- (this.uiServer = UIServerFactory.getUIServerImplementation(uiServerConfiguration));
const performanceStorageConfiguration =
Configuration.getConfigurationSection<StorageConfiguration>(
ConfigurationSection.performanceStorage,
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 BaseError('Cannot start charging stations simulator from worker thread');
- }
if (this.started === false) {
if (this.starting === false) {
this.starting = true;
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 {
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 BaseError('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 async waitChargingStationsStopped(): Promise<void> {
+ await Promise.race([
+ waitChargingStationEvents(
+ this,
+ ChargingStationWorkerMessageEvents.stopped,
+ this.numberOfChargingStations,
+ ),
+ new Promise<string>((resolve) => {
+ setTimeout(() => {
+ const message = `Timeout ${formatDurationMilliSeconds(
+ Constants.STOP_SIMULATOR_TIMEOUT,
+ )} reached at stopping charging stations simulator`;
+ console.warn(chalk.yellow(message));
+ resolve(message);
+ }, Constants.STOP_SIMULATOR_TIMEOUT);
+ }),
+ ]);
+ }
+
private initializeWorkerImplementation(workerConfiguration: WorkerConfiguration): void {
let elementsPerWorker: number | undefined;
if (workerConfiguration?.elementsPerWorker === 'auto') {
// logger.debug(
// `${this.logPrefix()} ${moduleName}.messageHandler: Worker channel message received: ${JSON.stringify(
// msg,
- // null,
+ // undefined,
// 2,
// )}`,
// );
throw new BaseError(
`Unknown charging station worker event: '${
msg.event
- }' received with data: ${JSON.stringify(msg.data, null, 2)}`,
+ }' received with data: ${JSON.stringify(msg.data, undefined, 2)}`,
);
}
} catch (error) {
console.warn(
chalk.yellow("'stationTemplateUrls' not defined or empty in configuration, exiting"),
);
- process.exit(exitCodes.missingChargingStationsConfiguration);
+ exit(exitCodes.missingChargingStationsConfiguration);
}
if (this.numberOfChargingStations === 0) {
console.warn(
chalk.yellow('No charging station template enabled in configuration, exiting'),
);
- process.exit(exitCodes.noChargingStationTemplates);
+ exit(exitCodes.noChargingStationTemplates);
}
this.initializedCounters = true;
}
});
}
- private gracefulShutdown = (): void => {
- console.info(`${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 |');
repositories / e-mobility-charging-stations-simulator.git / blobdiff