| 1 | // Partial Copyright Jerome Benoit. 2021. All Rights Reserved. |
| 2 | |
| 3 | import path from 'path'; |
| 4 | import { fileURLToPath } from 'url'; |
| 5 | import { isMainThread } from 'worker_threads'; |
| 6 | |
| 7 | import chalk from 'chalk'; |
| 8 | |
| 9 | import { version } from '../../package.json'; |
| 10 | import { Storage } from '../performance/storage/Storage'; |
| 11 | import { StorageFactory } from '../performance/storage/StorageFactory'; |
| 12 | import { |
| 13 | ChargingStationWorkerData, |
| 14 | ChargingStationWorkerMessage, |
| 15 | ChargingStationWorkerMessageEvents, |
| 16 | } from '../types/ChargingStationWorker'; |
| 17 | import { StationTemplateUrl } from '../types/ConfigurationData'; |
| 18 | import Statistics from '../types/Statistics'; |
| 19 | import { ApplicationProtocol } from '../types/UIProtocol'; |
| 20 | import Configuration from '../utils/Configuration'; |
| 21 | import Utils from '../utils/Utils'; |
| 22 | import WorkerAbstract from '../worker/WorkerAbstract'; |
| 23 | import WorkerFactory from '../worker/WorkerFactory'; |
| 24 | import { ChargingStationUtils } from './ChargingStationUtils'; |
| 25 | import { AbstractUIServer } from './ui-server/AbstractUIServer'; |
| 26 | import { UIServiceUtils } from './ui-server/ui-services/UIServiceUtils'; |
| 27 | import UIServerFactory from './ui-server/UIServerFactory'; |
| 28 | |
| 29 | export default class Bootstrap { |
| 30 | private static instance: Bootstrap | null = null; |
| 31 | private workerImplementation: WorkerAbstract<ChargingStationWorkerData> | null = null; |
| 32 | private readonly uiServer!: AbstractUIServer; |
| 33 | private readonly storage!: Storage; |
| 34 | private numberOfChargingStationTemplates!: number; |
| 35 | private numberOfChargingStations!: number; |
| 36 | private readonly version: string = version; |
| 37 | private started: boolean; |
| 38 | private readonly workerScript: string; |
| 39 | |
| 40 | private constructor() { |
| 41 | this.started = false; |
| 42 | this.workerScript = path.join( |
| 43 | path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../'), |
| 44 | 'charging-station', |
| 45 | 'ChargingStationWorker' + path.extname(fileURLToPath(import.meta.url)) |
| 46 | ); |
| 47 | this.initialize(); |
| 48 | Configuration.getUIServer().enabled && |
| 49 | (this.uiServer = UIServerFactory.getUIServerImplementation(ApplicationProtocol.WS, { |
| 50 | ...Configuration.getUIServer().options, |
| 51 | handleProtocols: UIServiceUtils.handleProtocols, |
| 52 | })); |
| 53 | Configuration.getPerformanceStorage().enabled && |
| 54 | (this.storage = StorageFactory.getStorage( |
| 55 | Configuration.getPerformanceStorage().type, |
| 56 | Configuration.getPerformanceStorage().uri, |
| 57 | this.logPrefix() |
| 58 | )); |
| 59 | Configuration.setConfigurationChangeCallback(async () => Bootstrap.getInstance().restart()); |
| 60 | } |
| 61 | |
| 62 | public static getInstance(): Bootstrap { |
| 63 | if (!Bootstrap.instance) { |
| 64 | Bootstrap.instance = new Bootstrap(); |
| 65 | } |
| 66 | return Bootstrap.instance; |
| 67 | } |
| 68 | |
| 69 | public async start(): Promise<void> { |
| 70 | if (isMainThread && !this.started) { |
| 71 | try { |
| 72 | this.initialize(); |
| 73 | await this.storage?.open(); |
| 74 | await this.workerImplementation.start(); |
| 75 | this.uiServer?.start(); |
| 76 | const stationTemplateUrls = Configuration.getStationTemplateUrls(); |
| 77 | this.numberOfChargingStationTemplates = stationTemplateUrls.length; |
| 78 | // Start ChargingStation object in worker thread |
| 79 | if (!Utils.isEmptyArray(stationTemplateUrls)) { |
| 80 | for (const stationTemplateUrl of stationTemplateUrls) { |
| 81 | try { |
| 82 | const nbStations = stationTemplateUrl.numberOfStations ?? 0; |
| 83 | for (let index = 1; index <= nbStations; index++) { |
| 84 | await this.startChargingStation(index, stationTemplateUrl); |
| 85 | } |
| 86 | } catch (error) { |
| 87 | console.error( |
| 88 | chalk.red( |
| 89 | 'Error at starting charging station with template file ' + |
| 90 | stationTemplateUrl.file + |
| 91 | ': ' |
| 92 | ), |
| 93 | error |
| 94 | ); |
| 95 | } |
| 96 | } |
| 97 | } else { |
| 98 | console.warn( |
| 99 | chalk.yellow("'stationTemplateUrls' not defined or empty in configuration, exiting") |
| 100 | ); |
| 101 | } |
| 102 | if (this.numberOfChargingStations === 0) { |
| 103 | console.warn( |
| 104 | chalk.yellow('No charging station template enabled in configuration, exiting') |
| 105 | ); |
| 106 | } else { |
| 107 | console.log( |
| 108 | chalk.green( |
| 109 | `Charging stations simulator ${ |
| 110 | this.version |
| 111 | } started with ${this.numberOfChargingStations.toString()} charging station(s) from ${this.numberOfChargingStationTemplates.toString()} configured charging station template(s) and ${ |
| 112 | ChargingStationUtils.workerDynamicPoolInUse() |
| 113 | ? `${Configuration.getWorker().poolMinSize.toString()}/` |
| 114 | : '' |
| 115 | }${this.workerImplementation.size}${ |
| 116 | ChargingStationUtils.workerPoolInUse() |
| 117 | ? `/${Configuration.getWorker().poolMaxSize.toString()}` |
| 118 | : '' |
| 119 | } worker(s) concurrently running in '${Configuration.getWorker().processType}' mode${ |
| 120 | this.workerImplementation.maxElementsPerWorker |
| 121 | ? ` (${this.workerImplementation.maxElementsPerWorker} charging station(s) per worker)` |
| 122 | : '' |
| 123 | }` |
| 124 | ) |
| 125 | ); |
| 126 | } |
| 127 | this.started = true; |
| 128 | } catch (error) { |
| 129 | console.error(chalk.red('Bootstrap start error '), error); |
| 130 | } |
| 131 | } else { |
| 132 | console.error(chalk.red('Cannot start an already started charging stations simulator')); |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | public async stop(): Promise<void> { |
| 137 | if (isMainThread && this.started) { |
| 138 | await this.workerImplementation.stop(); |
| 139 | this.workerImplementation = null; |
| 140 | this.uiServer?.stop(); |
| 141 | await this.storage?.close(); |
| 142 | } else { |
| 143 | console.error(chalk.red('Trying to stop the charging stations simulator while not started')); |
| 144 | } |
| 145 | this.started = false; |
| 146 | } |
| 147 | |
| 148 | public async restart(): Promise<void> { |
| 149 | await this.stop(); |
| 150 | this.initialize(); |
| 151 | await this.start(); |
| 152 | } |
| 153 | |
| 154 | private initializeWorkerImplementation(): void { |
| 155 | !this.workerImplementation && |
| 156 | (this.workerImplementation = WorkerFactory.getWorkerImplementation<ChargingStationWorkerData>( |
| 157 | this.workerScript, |
| 158 | Configuration.getWorker().processType, |
| 159 | { |
| 160 | workerStartDelay: Configuration.getWorker().startDelay, |
| 161 | elementStartDelay: Configuration.getWorker().elementStartDelay, |
| 162 | poolMaxSize: Configuration.getWorker().poolMaxSize, |
| 163 | poolMinSize: Configuration.getWorker().poolMinSize, |
| 164 | elementsPerWorker: Configuration.getWorker().elementsPerWorker, |
| 165 | poolOptions: { |
| 166 | workerChoiceStrategy: Configuration.getWorker().poolStrategy, |
| 167 | }, |
| 168 | messageHandler: async (msg: ChargingStationWorkerMessage) => { |
| 169 | if (msg.id === ChargingStationWorkerMessageEvents.STARTED) { |
| 170 | this.uiServer.chargingStations.add(msg.data.id as string); |
| 171 | } else if (msg.id === ChargingStationWorkerMessageEvents.STOPPED) { |
| 172 | this.uiServer.chargingStations.delete(msg.data.id as string); |
| 173 | } else if (msg.id === ChargingStationWorkerMessageEvents.PERFORMANCE_STATISTICS) { |
| 174 | await this.storage.storePerformanceStatistics(msg.data as unknown as Statistics); |
| 175 | } |
| 176 | }, |
| 177 | } |
| 178 | )); |
| 179 | } |
| 180 | |
| 181 | private initialize() { |
| 182 | this.numberOfChargingStations = 0; |
| 183 | this.numberOfChargingStationTemplates = 0; |
| 184 | this.initializeWorkerImplementation(); |
| 185 | } |
| 186 | |
| 187 | private async startChargingStation( |
| 188 | index: number, |
| 189 | stationTemplateUrl: StationTemplateUrl |
| 190 | ): Promise<void> { |
| 191 | const workerData: ChargingStationWorkerData = { |
| 192 | index, |
| 193 | templateFile: path.join( |
| 194 | path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../'), |
| 195 | 'assets', |
| 196 | 'station-templates', |
| 197 | stationTemplateUrl.file |
| 198 | ), |
| 199 | }; |
| 200 | await this.workerImplementation.addElement(workerData); |
| 201 | this.numberOfChargingStations++; |
| 202 | } |
| 203 | |
| 204 | private logPrefix(): string { |
| 205 | return Utils.logPrefix(' Bootstrap |'); |
| 206 | } |
| 207 | } |