| 1 | import { StationWorkerData, WorkerEvents, WorkerMessage } from '../types/Worker'; |
| 2 | |
| 3 | import Configuration from '../utils/Configuration'; |
| 4 | import { Storage } from '../utils/performance-storage/Storage'; |
| 5 | import { StorageFactory } from '../utils/performance-storage/StorageFactory'; |
| 6 | import Utils from '../utils/Utils'; |
| 7 | import WorkerAbstract from '../worker/WorkerAbstract'; |
| 8 | import WorkerFactory from '../worker/WorkerFactory'; |
| 9 | import chalk from 'chalk'; |
| 10 | import { isMainThread } from 'worker_threads'; |
| 11 | import path from 'path'; |
| 12 | import { version } from '../../package.json'; |
| 13 | |
| 14 | export default class Bootstrap { |
| 15 | private static instance: Bootstrap | null = null; |
| 16 | private static workerImplementation: WorkerAbstract | null = null; |
| 17 | private static storage: Storage; |
| 18 | private version: string = version; |
| 19 | private started: boolean; |
| 20 | private workerScript: string; |
| 21 | |
| 22 | private constructor() { |
| 23 | this.started = false; |
| 24 | this.workerScript = path.join(path.resolve(__dirname, '../'), 'charging-station', 'StationWorker.js'); |
| 25 | this.initWorkerImplementation(); |
| 26 | Bootstrap.storage = StorageFactory.getStorage(Configuration.getPerformanceStorage().type, Configuration.getPerformanceStorage().URI, this.logPrefix()); |
| 27 | Configuration.setConfigurationChangeCallback(async () => Bootstrap.getInstance().restart()); |
| 28 | } |
| 29 | |
| 30 | public static getInstance(): Bootstrap { |
| 31 | if (!Bootstrap.instance) { |
| 32 | Bootstrap.instance = new Bootstrap(); |
| 33 | } |
| 34 | return Bootstrap.instance; |
| 35 | } |
| 36 | |
| 37 | public async start(): Promise<void> { |
| 38 | if (isMainThread && !this.started) { |
| 39 | try { |
| 40 | let numStationsTotal = 0; |
| 41 | await Bootstrap.workerImplementation.start(); |
| 42 | // Start ChargingStation object in worker thread |
| 43 | if (Configuration.getStationTemplateURLs()) { |
| 44 | for (const stationURL of Configuration.getStationTemplateURLs()) { |
| 45 | try { |
| 46 | const nbStations = stationURL.numberOfStations ? stationURL.numberOfStations : 0; |
| 47 | for (let index = 1; index <= nbStations; index++) { |
| 48 | const workerData: StationWorkerData = { |
| 49 | index, |
| 50 | templateFile: path.join(path.resolve(__dirname, '../'), 'assets', 'station-templates', path.basename(stationURL.file)) |
| 51 | }; |
| 52 | await Bootstrap.workerImplementation.addElement(workerData); |
| 53 | numStationsTotal++; |
| 54 | } |
| 55 | } catch (error) { |
| 56 | console.error(chalk.red('Charging station start with template file ' + stationURL.file + ' error '), error); |
| 57 | } |
| 58 | } |
| 59 | } else { |
| 60 | console.warn(chalk.yellow('No stationTemplateURLs defined in configuration, exiting')); |
| 61 | } |
| 62 | if (numStationsTotal === 0) { |
| 63 | console.warn(chalk.yellow('No charging station template enabled in configuration, exiting')); |
| 64 | } else { |
| 65 | console.log(chalk.green(`Charging station simulator ${this.version} started with ${numStationsTotal.toString()} charging station(s) and ${Utils.workerDynamicPoolInUse() ? `${Configuration.getWorkerPoolMinSize().toString()}/` : ''}${Bootstrap.workerImplementation.size}${Utils.workerPoolInUse() ? `/${Configuration.getWorkerPoolMaxSize().toString()}` : ''} worker(s) concurrently running in '${Configuration.getWorkerProcess()}' mode${Bootstrap.workerImplementation.maxElementsPerWorker ? ` (${Bootstrap.workerImplementation.maxElementsPerWorker} charging station(s) per worker)` : ''}`)); |
| 66 | } |
| 67 | this.started = true; |
| 68 | } catch (error) { |
| 69 | console.error(chalk.red('Bootstrap start error '), error); |
| 70 | } |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | public async stop(): Promise<void> { |
| 75 | if (isMainThread && this.started) { |
| 76 | await Bootstrap.workerImplementation.stop(); |
| 77 | } |
| 78 | this.started = false; |
| 79 | } |
| 80 | |
| 81 | public async restart(): Promise<void> { |
| 82 | await this.stop(); |
| 83 | this.initWorkerImplementation(); |
| 84 | await this.start(); |
| 85 | } |
| 86 | |
| 87 | private initWorkerImplementation() { |
| 88 | Bootstrap.workerImplementation = WorkerFactory.getWorkerImplementation<StationWorkerData>(this.workerScript, Configuration.getWorkerProcess(), |
| 89 | { |
| 90 | startDelay: Configuration.getWorkerStartDelay(), |
| 91 | poolMaxSize: Configuration.getWorkerPoolMaxSize(), |
| 92 | poolMinSize: Configuration.getWorkerPoolMinSize(), |
| 93 | elementsPerWorker: Configuration.getChargingStationsPerWorker(), |
| 94 | poolOptions: { |
| 95 | workerChoiceStrategy: Configuration.getWorkerPoolStrategy() |
| 96 | } |
| 97 | }, (msg: WorkerMessage) => { |
| 98 | if (msg.id === WorkerEvents.PERFORMANCE_STATISTICS) { |
| 99 | Bootstrap.storage.storePerformanceStatistics(msg.data); |
| 100 | } |
| 101 | }); |
| 102 | if (!Bootstrap.workerImplementation) { |
| 103 | throw new Error('Worker implementation not found'); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | private logPrefix(): string { |
| 108 | return Utils.logPrefix(' Bootstrap'); |
| 109 | } |
| 110 | } |