| 1 | import LRUCache from 'mnemonist/lru-map-with-delete'; |
| 2 | |
| 3 | import type { ChargingStationConfiguration } from '../types/ChargingStationConfiguration'; |
| 4 | import type { ChargingStationTemplate } from '../types/ChargingStationTemplate'; |
| 5 | import Utils from '../utils/Utils'; |
| 6 | |
| 7 | enum CacheType { |
| 8 | CHARGING_STATION_TEMPLATE = 'chargingStationTemplate', |
| 9 | CHARGING_STATION_CONFIGURATION = 'chargingStationConfiguration', |
| 10 | } |
| 11 | |
| 12 | type CacheableType = ChargingStationTemplate | ChargingStationConfiguration; |
| 13 | |
| 14 | export default class SharedLRUCache { |
| 15 | private static instance: SharedLRUCache | null = null; |
| 16 | private readonly lruCache: LRUCache<string, CacheableType>; |
| 17 | |
| 18 | private constructor() { |
| 19 | this.lruCache = new LRUCache<string, CacheableType>(1000); |
| 20 | } |
| 21 | |
| 22 | public static getInstance(): SharedLRUCache { |
| 23 | if (SharedLRUCache.instance === null) { |
| 24 | SharedLRUCache.instance = new SharedLRUCache(); |
| 25 | } |
| 26 | return SharedLRUCache.instance; |
| 27 | } |
| 28 | |
| 29 | public hasChargingStationConfiguration(chargingStationConfigurationHash: string): boolean { |
| 30 | return this.has(this.getChargingStationConfigurationKey(chargingStationConfigurationHash)); |
| 31 | } |
| 32 | |
| 33 | public setChargingStationConfiguration( |
| 34 | chargingStationConfiguration: ChargingStationConfiguration |
| 35 | ): void { |
| 36 | if (this.isChargingStationConfigurationCacheable(chargingStationConfiguration)) { |
| 37 | this.set( |
| 38 | this.getChargingStationConfigurationKey(chargingStationConfiguration.configurationHash), |
| 39 | chargingStationConfiguration |
| 40 | ); |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | public getChargingStationConfiguration( |
| 45 | chargingStationConfigurationHash: string |
| 46 | ): ChargingStationConfiguration { |
| 47 | return this.get( |
| 48 | this.getChargingStationConfigurationKey(chargingStationConfigurationHash) |
| 49 | ) as ChargingStationConfiguration; |
| 50 | } |
| 51 | |
| 52 | public deleteChargingStationConfiguration(chargingStationConfigurationHash: string): void { |
| 53 | this.delete(this.getChargingStationConfigurationKey(chargingStationConfigurationHash)); |
| 54 | } |
| 55 | |
| 56 | public hasChargingStationTemplate(chargingStationTemplateHash: string): boolean { |
| 57 | return this.has(this.getChargingStationTemplateKey(chargingStationTemplateHash)); |
| 58 | } |
| 59 | |
| 60 | public setChargingStationTemplate(chargingStationTemplate: ChargingStationTemplate): void { |
| 61 | this.set( |
| 62 | this.getChargingStationTemplateKey(chargingStationTemplate.templateHash), |
| 63 | chargingStationTemplate |
| 64 | ); |
| 65 | } |
| 66 | |
| 67 | public getChargingStationTemplate(chargingStationTemplateHash: string): ChargingStationTemplate { |
| 68 | return this.get( |
| 69 | this.getChargingStationTemplateKey(chargingStationTemplateHash) |
| 70 | ) as ChargingStationTemplate; |
| 71 | } |
| 72 | |
| 73 | public deleteChargingStationTemplate(chargingStationTemplateHash: string): void { |
| 74 | this.delete(this.getChargingStationTemplateKey(chargingStationTemplateHash)); |
| 75 | } |
| 76 | |
| 77 | public clear(): void { |
| 78 | this.lruCache.clear(); |
| 79 | } |
| 80 | |
| 81 | private getChargingStationConfigurationKey(hash: string): string { |
| 82 | return CacheType.CHARGING_STATION_CONFIGURATION + hash; |
| 83 | } |
| 84 | |
| 85 | private getChargingStationTemplateKey(hash: string): string { |
| 86 | return CacheType.CHARGING_STATION_TEMPLATE + hash; |
| 87 | } |
| 88 | |
| 89 | private has(key: string): boolean { |
| 90 | return this.lruCache.has(key); |
| 91 | } |
| 92 | |
| 93 | private get(key: string): CacheableType { |
| 94 | return this.lruCache.get(key); |
| 95 | } |
| 96 | |
| 97 | private set(key: string, value: CacheableType): void { |
| 98 | this.lruCache.set(key, value); |
| 99 | } |
| 100 | |
| 101 | private delete(key: string): void { |
| 102 | this.lruCache.delete(key); |
| 103 | } |
| 104 | |
| 105 | private isChargingStationConfigurationCacheable( |
| 106 | chargingStationConfiguration: ChargingStationConfiguration |
| 107 | ): boolean { |
| 108 | return ( |
| 109 | Utils.isNullOrUndefined(chargingStationConfiguration?.configurationKey) === false && |
| 110 | Utils.isNullOrUndefined(chargingStationConfiguration?.stationInfo) === false && |
| 111 | Utils.isNullOrUndefined(chargingStationConfiguration?.configurationHash) === false && |
| 112 | Utils.isEmptyArray(chargingStationConfiguration?.configurationKey) === false && |
| 113 | Utils.isEmptyObject(chargingStationConfiguration?.stationInfo) === false && |
| 114 | Utils.isEmptyString(chargingStationConfiguration?.configurationHash) === false |
| 115 | ); |
| 116 | } |
| 117 | } |