| 1 | // Partial Copyright Jerome Benoit. 2021-2023. All Rights Reserved. |
| 2 | |
| 3 | import { type PerformanceEntry, PerformanceObserver, performance } from 'node:perf_hooks'; |
| 4 | import type { URL } from 'node:url'; |
| 5 | import { parentPort } from 'node:worker_threads'; |
| 6 | |
| 7 | import { MessageChannelUtils } from '../charging-station'; |
| 8 | import { |
| 9 | type IncomingRequestCommand, |
| 10 | MessageType, |
| 11 | type RequestCommand, |
| 12 | type Statistics, |
| 13 | type TimeSeries, |
| 14 | } from '../types'; |
| 15 | import { CircularArray, Configuration, Constants, Utils, logger } from '../utils'; |
| 16 | |
| 17 | export class PerformanceStatistics { |
| 18 | private static readonly instances: Map<string, PerformanceStatistics> = new Map< |
| 19 | string, |
| 20 | PerformanceStatistics |
| 21 | >(); |
| 22 | |
| 23 | private readonly objId: string; |
| 24 | private readonly objName: string; |
| 25 | private performanceObserver!: PerformanceObserver; |
| 26 | private readonly statistics: Statistics; |
| 27 | private displayInterval!: NodeJS.Timeout; |
| 28 | |
| 29 | private constructor(objId: string, objName: string, uri: URL) { |
| 30 | this.objId = objId; |
| 31 | this.objName = objName; |
| 32 | this.initializePerformanceObserver(); |
| 33 | this.statistics = { |
| 34 | id: this.objId ?? 'Object id not specified', |
| 35 | name: this.objName ?? 'Object name not specified', |
| 36 | uri: uri.toString(), |
| 37 | createdAt: new Date(), |
| 38 | statisticsData: new Map(), |
| 39 | }; |
| 40 | } |
| 41 | |
| 42 | public static getInstance( |
| 43 | objId: string, |
| 44 | objName: string, |
| 45 | uri: URL |
| 46 | ): PerformanceStatistics | undefined { |
| 47 | if (!PerformanceStatistics.instances.has(objId)) { |
| 48 | PerformanceStatistics.instances.set(objId, new PerformanceStatistics(objId, objName, uri)); |
| 49 | } |
| 50 | return PerformanceStatistics.instances.get(objId); |
| 51 | } |
| 52 | |
| 53 | public static beginMeasure(id: string): string { |
| 54 | const markId = `${id.charAt(0).toUpperCase()}${id.slice(1)}~${Utils.generateUUID()}`; |
| 55 | performance.mark(markId); |
| 56 | return markId; |
| 57 | } |
| 58 | |
| 59 | public static endMeasure(name: string, markId: string): void { |
| 60 | performance.measure(name, markId); |
| 61 | performance.clearMarks(markId); |
| 62 | performance.clearMeasures(name); |
| 63 | } |
| 64 | |
| 65 | public addRequestStatistic( |
| 66 | command: RequestCommand | IncomingRequestCommand, |
| 67 | messageType: MessageType |
| 68 | ): void { |
| 69 | switch (messageType) { |
| 70 | case MessageType.CALL_MESSAGE: |
| 71 | if ( |
| 72 | this.statistics.statisticsData.has(command) && |
| 73 | this.statistics.statisticsData.get(command)?.countRequest |
| 74 | ) { |
| 75 | this.statistics.statisticsData.get(command).countRequest++; |
| 76 | } else { |
| 77 | this.statistics.statisticsData.set(command, { |
| 78 | ...this.statistics.statisticsData.get(command), |
| 79 | countRequest: 1, |
| 80 | }); |
| 81 | } |
| 82 | break; |
| 83 | case MessageType.CALL_RESULT_MESSAGE: |
| 84 | if ( |
| 85 | this.statistics.statisticsData.has(command) && |
| 86 | this.statistics.statisticsData.get(command)?.countResponse |
| 87 | ) { |
| 88 | this.statistics.statisticsData.get(command).countResponse++; |
| 89 | } else { |
| 90 | this.statistics.statisticsData.set(command, { |
| 91 | ...this.statistics.statisticsData.get(command), |
| 92 | countResponse: 1, |
| 93 | }); |
| 94 | } |
| 95 | break; |
| 96 | case MessageType.CALL_ERROR_MESSAGE: |
| 97 | if ( |
| 98 | this.statistics.statisticsData.has(command) && |
| 99 | this.statistics.statisticsData.get(command)?.countError |
| 100 | ) { |
| 101 | this.statistics.statisticsData.get(command).countError++; |
| 102 | } else { |
| 103 | this.statistics.statisticsData.set(command, { |
| 104 | ...this.statistics.statisticsData.get(command), |
| 105 | countError: 1, |
| 106 | }); |
| 107 | } |
| 108 | break; |
| 109 | default: |
| 110 | // eslint-disable-next-line @typescript-eslint/restrict-template-expressions |
| 111 | logger.error(`${this.logPrefix()} wrong message type ${messageType}`); |
| 112 | break; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | public start(): void { |
| 117 | this.startLogStatisticsInterval(); |
| 118 | if (Configuration.getPerformanceStorage().enabled) { |
| 119 | logger.info( |
| 120 | `${this.logPrefix()} storage enabled: type ${ |
| 121 | Configuration.getPerformanceStorage().type |
| 122 | }, uri: ${Configuration.getPerformanceStorage().uri}` |
| 123 | ); |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | public stop(): void { |
| 128 | this.stopLogStatisticsInterval(); |
| 129 | performance.clearMarks(); |
| 130 | performance.clearMeasures(); |
| 131 | this.performanceObserver?.disconnect(); |
| 132 | } |
| 133 | |
| 134 | public restart(): void { |
| 135 | this.stop(); |
| 136 | this.start(); |
| 137 | } |
| 138 | |
| 139 | private initializePerformanceObserver(): void { |
| 140 | this.performanceObserver = new PerformanceObserver((performanceObserverList) => { |
| 141 | const lastPerformanceEntry = performanceObserverList.getEntries()[0]; |
| 142 | // logger.debug( |
| 143 | // `${this.logPrefix()} '${lastPerformanceEntry.name}' performance entry: %j`, |
| 144 | // lastPerformanceEntry |
| 145 | // ); |
| 146 | this.addPerformanceEntryToStatistics(lastPerformanceEntry); |
| 147 | }); |
| 148 | this.performanceObserver.observe({ entryTypes: ['measure'] }); |
| 149 | } |
| 150 | |
| 151 | private logStatistics(): void { |
| 152 | logger.info(`${this.logPrefix()}`, { |
| 153 | ...this.statistics, |
| 154 | statisticsData: Utils.JSONStringifyWithMapSupport(this.statistics.statisticsData), |
| 155 | }); |
| 156 | } |
| 157 | |
| 158 | private startLogStatisticsInterval(): void { |
| 159 | const logStatisticsInterval = Configuration.getLogStatisticsInterval(); |
| 160 | if (logStatisticsInterval > 0 && !this.displayInterval) { |
| 161 | this.displayInterval = setInterval(() => { |
| 162 | this.logStatistics(); |
| 163 | }, logStatisticsInterval * 1000); |
| 164 | logger.info( |
| 165 | `${this.logPrefix()} logged every ${Utils.formatDurationSeconds(logStatisticsInterval)}` |
| 166 | ); |
| 167 | } else if (this.displayInterval) { |
| 168 | logger.info( |
| 169 | `${this.logPrefix()} already logged every ${Utils.formatDurationSeconds( |
| 170 | logStatisticsInterval |
| 171 | )}` |
| 172 | ); |
| 173 | } else { |
| 174 | logger.info( |
| 175 | `${this.logPrefix()} log interval is set to ${logStatisticsInterval?.toString()}. Not logging statistics` |
| 176 | ); |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | private stopLogStatisticsInterval(): void { |
| 181 | if (this.displayInterval) { |
| 182 | clearInterval(this.displayInterval); |
| 183 | delete this.displayInterval; |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | private addPerformanceEntryToStatistics(entry: PerformanceEntry): void { |
| 188 | const entryName = entry.name; |
| 189 | // Initialize command statistics |
| 190 | if (!this.statistics.statisticsData.has(entryName)) { |
| 191 | this.statistics.statisticsData.set(entryName, {}); |
| 192 | } |
| 193 | // Update current statistics |
| 194 | this.statistics.updatedAt = new Date(); |
| 195 | this.statistics.statisticsData.get(entryName).countTimeMeasurement = |
| 196 | this.statistics.statisticsData.get(entryName)?.countTimeMeasurement |
| 197 | ? this.statistics.statisticsData.get(entryName).countTimeMeasurement + 1 |
| 198 | : 1; |
| 199 | this.statistics.statisticsData.get(entryName).currentTimeMeasurement = entry.duration; |
| 200 | this.statistics.statisticsData.get(entryName).minTimeMeasurement = |
| 201 | this.statistics.statisticsData.get(entryName)?.minTimeMeasurement |
| 202 | ? this.statistics.statisticsData.get(entryName).minTimeMeasurement > entry.duration |
| 203 | ? entry.duration |
| 204 | : this.statistics.statisticsData.get(entryName).minTimeMeasurement |
| 205 | : entry.duration; |
| 206 | this.statistics.statisticsData.get(entryName).maxTimeMeasurement = |
| 207 | this.statistics.statisticsData.get(entryName)?.maxTimeMeasurement |
| 208 | ? this.statistics.statisticsData.get(entryName).maxTimeMeasurement < entry.duration |
| 209 | ? entry.duration |
| 210 | : this.statistics.statisticsData.get(entryName).maxTimeMeasurement |
| 211 | : entry.duration; |
| 212 | this.statistics.statisticsData.get(entryName).totalTimeMeasurement = |
| 213 | this.statistics.statisticsData.get(entryName)?.totalTimeMeasurement |
| 214 | ? this.statistics.statisticsData.get(entryName).totalTimeMeasurement + entry.duration |
| 215 | : entry.duration; |
| 216 | this.statistics.statisticsData.get(entryName).avgTimeMeasurement = |
| 217 | this.statistics.statisticsData.get(entryName).totalTimeMeasurement / |
| 218 | this.statistics.statisticsData.get(entryName).countTimeMeasurement; |
| 219 | this.statistics.statisticsData.get(entryName)?.timeMeasurementSeries instanceof CircularArray |
| 220 | ? this.statistics.statisticsData |
| 221 | .get(entryName) |
| 222 | ?.timeMeasurementSeries?.push({ timestamp: entry.startTime, value: entry.duration }) |
| 223 | : (this.statistics.statisticsData.get(entryName).timeMeasurementSeries = |
| 224 | new CircularArray<TimeSeries>(Constants.DEFAULT_CIRCULAR_BUFFER_CAPACITY, { |
| 225 | timestamp: entry.startTime, |
| 226 | value: entry.duration, |
| 227 | })); |
| 228 | this.statistics.statisticsData.get(entryName).medTimeMeasurement = Utils.median( |
| 229 | this.extractTimeSeriesValues( |
| 230 | this.statistics.statisticsData.get(entryName).timeMeasurementSeries |
| 231 | ) |
| 232 | ); |
| 233 | this.statistics.statisticsData.get(entryName).ninetyFiveThPercentileTimeMeasurement = |
| 234 | Utils.percentile( |
| 235 | this.extractTimeSeriesValues( |
| 236 | this.statistics.statisticsData.get(entryName).timeMeasurementSeries |
| 237 | ), |
| 238 | 95 |
| 239 | ); |
| 240 | this.statistics.statisticsData.get(entryName).stdDevTimeMeasurement = Utils.stdDeviation( |
| 241 | this.extractTimeSeriesValues( |
| 242 | this.statistics.statisticsData.get(entryName).timeMeasurementSeries |
| 243 | ) |
| 244 | ); |
| 245 | if (Configuration.getPerformanceStorage().enabled) { |
| 246 | parentPort?.postMessage( |
| 247 | MessageChannelUtils.buildPerformanceStatisticsMessage(this.statistics) |
| 248 | ); |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | private extractTimeSeriesValues(timeSeries: CircularArray<TimeSeries>): number[] { |
| 253 | return timeSeries.map((timeSeriesItem) => timeSeriesItem.value); |
| 254 | } |
| 255 | |
| 256 | private logPrefix = (): string => { |
| 257 | return Utils.logPrefix(` ${this.objName} | Performance statistics`); |
| 258 | }; |
| 259 | } |