// 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 'node:worker_threads';
noChargingStationTemplates = 2,
}
-export class Bootstrap {
+export class Bootstrap extends EventEmitter {
private static instance: Bootstrap | null = null;
public numberOfChargingStations!: number;
public numberOfChargingStationTemplates!: number;
private readonly workerScript: string;
private constructor() {
+ super();
for (const signal of ['SIGINT', 'SIGQUIT', 'SIGTERM']) {
- process.on(signal, () => {
- this.gracefulShutdown().catch(Constants.EMPTY_FUNCTION);
- });
+ process.on(signal, this.gracefulShutdown);
}
// Enable unconditionally for now
ErrorUtils.handleUnhandledRejection();
public async stop(): Promise<void> {
if (isMainThread && this.started === true) {
await this.uiServer?.sendBroadcastChannelRequest(
- Utils.generateUUID(),
- ProcedureName.STOP_CHARGING_STATION,
- Constants.EMPTY_FREEZED_OBJECT
+ 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();
switch (msg.id) {
case ChargingStationWorkerMessageEvents.started:
this.workerEventStarted(msg.data as ChargingStationData);
+ this.emit(ChargingStationWorkerMessageEvents.started, msg.data as ChargingStationData);
break;
case ChargingStationWorkerMessageEvents.stopped:
this.workerEventStopped(msg.data as ChargingStationData);
+ this.emit(ChargingStationWorkerMessageEvents.stopped, msg.data as ChargingStationData);
break;
case ChargingStationWorkerMessageEvents.updated:
this.workerEventUpdated(msg.data as ChargingStationData);
+ this.emit(ChargingStationWorkerMessageEvents.updated, msg.data as ChargingStationData);
break;
case ChargingStationWorkerMessageEvents.performanceStatistics:
this.workerEventPerformanceStatistics(msg.data as Statistics);
+ this.emit(
+ ChargingStationWorkerMessageEvents.performanceStatistics,
+ msg.data as Statistics
+ );
break;
default:
throw new BaseError(
});
}
- private gracefulShutdown = async (): Promise<void> => {
+ private gracefulShutdown = (): void => {
console.info(`${chalk.green('Graceful shutdown')}`);
- try {
- await this.stop();
- process.exit(0);
- } catch (error) {
- process.exit(1);
- }
+ this.stop()
+ .then(() => {
+ process.exit(0);
+ })
+ .catch((error) => {
+ console.error(chalk.red('Error while stopping 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 => {