// Partial Copyright Jerome Benoit. 2021-2023. All Rights Reserved.
+import { EventEmitter } from 'node:events';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
-import { type Worker, isMainThread } from 'worker_threads';
+import { type Worker, isMainThread } from 'node:worker_threads';
import chalk from 'chalk';
-import { ChargingStationUtils } from './ChargingStationUtils';
import type { AbstractUIServer } from './ui-server/AbstractUIServer';
import { UIServerFactory } from './ui-server/UIServerFactory';
-import { version } from '../../package.json';
+import packageJson from '../../package.json' assert { type: 'json' };
import { BaseError } from '../exception';
-import type { Storage } from '../performance/storage/Storage';
-import { StorageFactory } from '../performance/storage/StorageFactory';
+import { type Storage, StorageFactory } from '../performance';
import {
type ChargingStationData,
type ChargingStationWorkerData,
type ChargingStationWorkerMessage,
type ChargingStationWorkerMessageData,
ChargingStationWorkerMessageEvents,
+ ProcedureName,
type StationTemplateUrl,
type Statistics,
} from '../types';
-import { Configuration } from '../utils/Configuration';
-import { logger } from '../utils/Logger';
-import { Utils } from '../utils/Utils';
+import {
+ Configuration,
+ Constants,
+ Utils,
+ handleUncaughtException,
+ handleUnhandledRejection,
+ logger,
+} from '../utils';
import { type MessageHandler, type WorkerAbstract, WorkerFactory } from '../worker';
const moduleName = 'Bootstrap';
noChargingStationTemplates = 2,
}
-export class Bootstrap {
+export class Bootstrap extends EventEmitter {
private static instance: Bootstrap | null = null;
public numberOfChargingStations!: number;
public numberOfChargingStationTemplates!: number;
private readonly uiServer!: AbstractUIServer | null;
private readonly storage!: Storage;
private numberOfStartedChargingStations!: number;
- private readonly version: string = version;
+ private readonly version: string = packageJson.version;
private initializedCounters: boolean;
private started: boolean;
+ private starting: boolean;
+ private stopping: boolean;
private readonly workerScript: string;
private constructor() {
+ super();
+ for (const signal of ['SIGINT', 'SIGQUIT', 'SIGTERM']) {
+ process.on(signal, this.gracefulShutdown);
+ }
// Enable unconditionally for now
- this.logUnhandledRejection();
- this.logUncaughtException();
- this.initializedCounters = false;
+ handleUnhandledRejection();
+ handleUncaughtException();
this.started = false;
+ this.starting = false;
+ this.stopping = false;
+ this.initializedCounters = false;
this.initializeCounters();
this.workerImplementation = null;
this.workerScript = path.join(
- path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../'),
- 'charging-station',
+ path.dirname(fileURLToPath(import.meta.url)),
`ChargingStationWorker${path.extname(fileURLToPath(import.meta.url))}`
);
Configuration.getUIServer().enabled === true &&
}
public async start(): Promise<void> {
- if (isMainThread && this.started === false) {
- this.initializeCounters();
- this.initializeWorkerImplementation();
- await this.workerImplementation?.start();
- await this.storage?.open();
- this.uiServer?.start();
- // Start ChargingStation object instance in worker thread
- for (const stationTemplateUrl of Configuration.getStationTemplateUrls()) {
- try {
- const nbStations = stationTemplateUrl.numberOfStations ?? 0;
- for (let index = 1; index <= nbStations; index++) {
- await this.startChargingStation(index, stationTemplateUrl);
+ 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();
+ await this.workerImplementation?.start();
+ await this.storage?.open();
+ this.uiServer?.start();
+ // Start ChargingStation object instance in worker thread
+ for (const stationTemplateUrl of Configuration.getStationTemplateUrls()) {
+ try {
+ const nbStations = stationTemplateUrl.numberOfStations ?? 0;
+ for (let index = 1; index <= nbStations; index++) {
+ await this.startChargingStation(index, stationTemplateUrl);
+ }
+ } catch (error) {
+ console.error(
+ chalk.red(
+ `Error at starting charging station with template file ${stationTemplateUrl.file}: `
+ ),
+ error
+ );
}
- } catch (error) {
- console.error(
- chalk.red(
- `Error at starting charging station with template file ${stationTemplateUrl.file}: `
- ),
- error
- );
}
+ console.info(
+ chalk.green(
+ `Charging stations simulator ${
+ this.version
+ } started with ${this.numberOfChargingStations.toString()} charging station(s) from ${this.numberOfChargingStationTemplates.toString()} configured charging station template(s) and ${
+ Configuration.workerDynamicPoolInUse()
+ ? `${Configuration.getWorker().poolMinSize?.toString()}/`
+ : ''
+ }${this.workerImplementation?.size}${
+ Configuration.workerPoolInUse()
+ ? `/${Configuration.getWorker().poolMaxSize?.toString()}`
+ : ''
+ } worker(s) concurrently running in '${Configuration.getWorker().processType}' mode${
+ !Utils.isNullOrUndefined(this.workerImplementation?.maxElementsPerWorker)
+ ? ` (${this.workerImplementation?.maxElementsPerWorker} charging station(s) per worker)`
+ : ''
+ }`
+ )
+ );
+ this.started = true;
+ this.starting = false;
+ } else {
+ console.error(chalk.red('Cannot start an already starting charging stations simulator'));
}
- console.info(
- chalk.green(
- `Charging stations simulator ${
- this.version
- } started with ${this.numberOfChargingStations.toString()} charging station(s) from ${this.numberOfChargingStationTemplates.toString()} configured charging station template(s) and ${
- ChargingStationUtils.workerDynamicPoolInUse()
- ? `${Configuration.getWorker().poolMinSize?.toString()}/`
- : ''
- }${this.workerImplementation?.size}${
- ChargingStationUtils.workerPoolInUse()
- ? `/${Configuration.getWorker().poolMaxSize?.toString()}`
- : ''
- } worker(s) concurrently running in '${Configuration.getWorker().processType}' mode${
- !Utils.isNullOrUndefined(this.workerImplementation?.maxElementsPerWorker)
- ? ` (${this.workerImplementation?.maxElementsPerWorker} charging station(s) per worker)`
- : ''
- }`
- )
- );
- this.started = true;
} else {
console.error(chalk.red('Cannot start an already started charging stations simulator'));
}
}
public async stop(): Promise<void> {
- if (isMainThread && this.started === true) {
- await this.workerImplementation?.stop();
- this.workerImplementation = null;
- this.uiServer?.stop();
- await this.storage?.close();
- this.initializedCounters = false;
- this.started = false;
+ if (!isMainThread) {
+ throw new Error('Cannot stop charging stations simulator from worker thread');
+ }
+ if (this.started === true) {
+ if (this.stopping === false) {
+ this.stopping = true;
+ await this.uiServer?.sendInternalRequest(
+ this.uiServer.buildProtocolRequest(
+ Utils.generateUUID(),
+ ProcedureName.STOP_CHARGING_STATION,
+ Constants.EMPTY_FREEZED_OBJECT
+ )
+ );
+ await this.waitForChargingStationsStopped();
+ await this.workerImplementation?.stop();
+ this.workerImplementation = null;
+ this.uiServer?.stop();
+ await this.storage?.close();
+ this.resetCounters();
+ this.initializedCounters = false;
+ this.started = false;
+ this.stopping = false;
+ } else {
+ console.error(chalk.red('Cannot stop an already stopping charging stations simulator'));
+ }
} else {
- console.error(chalk.red('Cannot stop a not started charging stations simulator'));
+ console.error(chalk.red('Cannot stop an already stopped charging stations simulator'));
}
}
// );
try {
switch (msg.id) {
- case ChargingStationWorkerMessageEvents.STARTED:
+ case ChargingStationWorkerMessageEvents.started:
this.workerEventStarted(msg.data as ChargingStationData);
+ this.emit(ChargingStationWorkerMessageEvents.started, msg.data as ChargingStationData);
break;
- case ChargingStationWorkerMessageEvents.STOPPED:
+ case ChargingStationWorkerMessageEvents.stopped:
this.workerEventStopped(msg.data as ChargingStationData);
+ this.emit(ChargingStationWorkerMessageEvents.stopped, msg.data as ChargingStationData);
break;
- case ChargingStationWorkerMessageEvents.UPDATED:
+ case ChargingStationWorkerMessageEvents.updated:
this.workerEventUpdated(msg.data as ChargingStationData);
+ this.emit(ChargingStationWorkerMessageEvents.updated, msg.data as ChargingStationData);
break;
- case ChargingStationWorkerMessageEvents.PERFORMANCE_STATISTICS:
+ case ChargingStationWorkerMessageEvents.performanceStatistics:
this.workerEventPerformanceStatistics(msg.data as Statistics);
+ this.emit(
+ ChargingStationWorkerMessageEvents.performanceStatistics,
+ msg.data as Statistics
+ );
break;
default:
throw new BaseError(
private initializeCounters() {
if (this.initializedCounters === false) {
- this.numberOfChargingStationTemplates = 0;
- this.numberOfChargingStations = 0;
+ this.resetCounters();
const stationTemplateUrls = Configuration.getStationTemplateUrls();
if (Utils.isNotEmptyArray(stationTemplateUrls)) {
this.numberOfChargingStationTemplates = stationTemplateUrls.length;
- stationTemplateUrls.forEach((stationTemplateUrl) => {
+ for (const stationTemplateUrl of stationTemplateUrls) {
this.numberOfChargingStations += stationTemplateUrl.numberOfStations ?? 0;
- });
+ }
} else {
console.warn(
chalk.yellow("'stationTemplateUrls' not defined or empty in configuration, exiting")
);
process.exit(exitCodes.noChargingStationTemplates);
}
- this.numberOfStartedChargingStations = 0;
this.initializedCounters = true;
}
}
- private logUncaughtException(): void {
- process.on('uncaughtException', (error: Error) => {
- console.error(chalk.red('Uncaught exception: '), error);
- });
- }
-
- private logUnhandledRejection(): void {
- process.on('unhandledRejection', (reason: unknown) => {
- console.error(chalk.red('Unhandled rejection: '), reason);
- });
+ private resetCounters(): void {
+ this.numberOfChargingStationTemplates = 0;
+ this.numberOfChargingStations = 0;
+ this.numberOfStartedChargingStations = 0;
}
private async startChargingStation(
await this.workerImplementation?.addElement({
index,
templateFile: path.join(
- path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../'),
+ path.dirname(fileURLToPath(import.meta.url)),
'assets',
'station-templates',
stationTemplateUrl.file
});
}
+ private gracefulShutdown = (): void => {
+ console.info(`${chalk.green('Graceful shutdown')}`);
+ this.stop()
+ .then(() => {
+ process.exit(0);
+ })
+ .catch((error) => {
+ console.error(chalk.red('Error while shutdowning charging stations simulator: '), error);
+ process.exit(1);
+ });
+ };
+
+ private waitForChargingStationsStopped = async (
+ stoppedEventsToWait = this.numberOfStartedChargingStations
+ ): Promise<number> => {
+ return new Promise((resolve) => {
+ let stoppedEvents = 0;
+ if (stoppedEventsToWait === 0) {
+ resolve(stoppedEvents);
+ }
+ this.on(ChargingStationWorkerMessageEvents.stopped, () => {
+ ++stoppedEvents;
+ if (stoppedEvents === stoppedEventsToWait) {
+ resolve(stoppedEvents);
+ }
+ });
+ });
+ };
+
private logPrefix = (): string => {
return Utils.logPrefix(' Bootstrap |');
};
repositories / e-mobility-charging-stations-simulator.git / blobdiff