1 // Partial Copyright Jerome Benoit. 2021. All Rights Reserved.
4 ChargingStationWorkerData
,
5 ChargingStationWorkerMessage
,
6 ChargingStationWorkerMessageEvents
,
7 } from
'../types/ChargingStationWorker';
9 import Configuration from
'../utils/Configuration';
10 import { StationTemplateUrl
} from
'../types/ConfigurationData';
11 import Statistics from
'../types/Statistics';
12 import { Storage
} from
'../performance/storage/Storage';
13 import { StorageFactory
} from
'../performance/storage/StorageFactory';
14 import { UIServiceUtils
} from
'./ui-websocket-services/UIServiceUtils';
15 import UIWebSocketServer from
'./UIWebSocketServer';
16 import Utils from
'../utils/Utils';
17 import WorkerAbstract from
'../worker/WorkerAbstract';
18 import WorkerFactory from
'../worker/WorkerFactory';
19 import chalk from
'chalk';
20 import { isMainThread
} from
'worker_threads';
21 import path from
'path';
22 import { version
} from
'../../package.json';
24 export default class Bootstrap
{
25 private static instance
: Bootstrap
| null = null;
26 private workerImplementation
: WorkerAbstract
<ChargingStationWorkerData
> | null = null;
27 private readonly uiWebSocketServer
!: UIWebSocketServer
;
28 private readonly storage
!: Storage
;
29 private numberOfChargingStations
: number;
30 private readonly version
: string = version
;
31 private started
: boolean;
32 private readonly workerScript
: string;
34 private constructor() {
36 this.workerScript
= path
.join(
37 path
.resolve(__dirname
, '../'),
39 'ChargingStationWorker.js'
41 this.initWorkerImplementation();
42 Configuration
.getUIWebSocketServer().enabled
&&
43 (this.uiWebSocketServer
= new UIWebSocketServer({
44 ...Configuration
.getUIWebSocketServer().options
,
45 handleProtocols
: UIServiceUtils
.handleProtocols
,
47 Configuration
.getPerformanceStorage().enabled
&&
48 (this.storage
= StorageFactory
.getStorage(
49 Configuration
.getPerformanceStorage().type,
50 Configuration
.getPerformanceStorage().uri
,
53 Configuration
.setConfigurationChangeCallback(async () => Bootstrap
.getInstance().restart());
56 public static getInstance(): Bootstrap
{
57 if (!Bootstrap
.instance
) {
58 Bootstrap
.instance
= new Bootstrap();
60 return Bootstrap
.instance
;
63 public async start(): Promise
<void> {
64 if (isMainThread
&& !this.started
) {
66 this.numberOfChargingStations
= 0;
67 await this.storage
?.open();
68 await this.workerImplementation
.start();
69 this.uiWebSocketServer
?.start();
70 const stationTemplateUrls
= Configuration
.getStationTemplateUrls();
71 // Start ChargingStation object in worker thread
72 if (stationTemplateUrls
) {
73 for (const stationTemplateUrl
of stationTemplateUrls
) {
75 const nbStations
= stationTemplateUrl
.numberOfStations
?? 0;
76 for (let index
= 1; index
<= nbStations
; index
++) {
77 await this.startChargingStation(index
, stationTemplateUrl
);
82 'Error at starting charging station with template file ' +
83 stationTemplateUrl
.file
+
91 console
.warn(chalk
.yellow("No 'stationTemplateUrls' defined in configuration, exiting"));
93 if (this.numberOfChargingStations
=== 0) {
95 chalk
.yellow('No charging station template enabled in configuration, exiting')
100 `Charging stations simulator ${
102 } started with ${this.numberOfChargingStations.toString()} charging station(s) and ${
103 Utils.workerDynamicPoolInUse()
104 ? `${Configuration.getWorkerPoolMinSize().toString()}
/`
106 }${this.workerImplementation.size}${
107 Utils.workerPoolInUse() ? `/${Configuration.getWorkerPoolMaxSize().toString()}
` : ''
108 } worker(s) concurrently running in '${Configuration.getWorkerProcess()}' mode${
109 this.workerImplementation.maxElementsPerWorker
110 ? ` (${this.workerImplementation.maxElementsPerWorker} charging
station(s
) per worker
)`
118 console
.error(chalk
.red('Bootstrap start error '), error
);
121 console
.error(chalk
.red('Cannot start an already started charging stations simulator'));
125 public async stop(): Promise
<void> {
126 if (isMainThread
&& this.started
) {
127 await this.workerImplementation
.stop();
128 this.uiWebSocketServer
?.stop();
129 await this.storage
?.close();
131 console
.error(chalk
.red('Trying to stop the charging stations simulator while not started'));
133 this.started
= false;
136 public async restart(): Promise
<void> {
138 this.initWorkerImplementation();
142 private initWorkerImplementation(): void {
143 this.workerImplementation
= WorkerFactory
.getWorkerImplementation
<ChargingStationWorkerData
>(
145 Configuration
.getWorkerProcess(),
147 workerStartDelay
: Configuration
.getWorkerStartDelay(),
148 elementStartDelay
: Configuration
.getElementStartDelay(),
149 poolMaxSize
: Configuration
.getWorkerPoolMaxSize(),
150 poolMinSize
: Configuration
.getWorkerPoolMinSize(),
151 elementsPerWorker
: Configuration
.getChargingStationsPerWorker(),
153 workerChoiceStrategy
: Configuration
.getWorkerPoolStrategy(),
155 messageHandler
: async (msg
: ChargingStationWorkerMessage
) => {
156 if (msg
.id
=== ChargingStationWorkerMessageEvents
.STARTED
) {
157 this.uiWebSocketServer
.chargingStations
.add(msg
.data
.id
as string);
158 } else if (msg
.id
=== ChargingStationWorkerMessageEvents
.STOPPED
) {
159 this.uiWebSocketServer
.chargingStations
.delete(msg
.data
.id
as string);
160 } else if (msg
.id
=== ChargingStationWorkerMessageEvents
.PERFORMANCE_STATISTICS
) {
161 await this.storage
.storePerformanceStatistics(msg
.data
as unknown
as Statistics
);
168 private async startChargingStation(
170 stationTemplateUrl
: StationTemplateUrl
172 const workerData
: ChargingStationWorkerData
= {
174 templateFile
: path
.join(
175 path
.resolve(__dirname
, '../'),
178 path
.basename(stationTemplateUrl
.file
)
181 await this.workerImplementation
.addElement(workerData
);
182 this.numberOfChargingStations
++;
185 private logPrefix(): string {
186 return Utils
.logPrefix(' Bootstrap |');