src/charging-station/AutomaticTransactionGenerator.js

   1 const logger = require('../utils/Logger');
   2 const Constants = require('../utils/Constants');
   3 const Utils = require('../utils/Utils');
   4 const {performance, PerformanceObserver} = require('perf_hooks');
   5
   6 class AutomaticTransactionGenerator {
   7   constructor(chargingStation) {
   8     this._chargingStation = chargingStation;
   9     this._timeToStop = true;
  10     if (this._chargingStation.getEnableStatistics()) {
  11       this._performanceObserver = new PerformanceObserver((list) => {
  12         const entry = list.getEntries()[0];
  13         this._chargingStation._statistics.logPerformance(entry, 'AutomaticTransactionGenerator');
  14         this._performanceObserver.disconnect();
  15       });
  16     }
  17   }
  18
  19   get timeToStop() {
  20     return this._timeToStop;
  21   }
  22
  23   _logPrefix(connectorId = null) {
  24     if (connectorId) {
  25       return Utils.logPrefix(' ' + this._chargingStation._stationInfo.name + ' ATG on connector #' + connectorId + ':');
  26     }
  27     return Utils.logPrefix(' ' + this._chargingStation._stationInfo.name + ' ATG:');
  28   }
  29
  30   async start() {
  31     this._timeToStop = false;
  32     if (this._chargingStation._stationInfo.AutomaticTransactionGenerator.stopAfterHours &&
  33       this._chargingStation._stationInfo.AutomaticTransactionGenerator.stopAfterHours > 0) {
  34       setTimeout(() => {
  35         this.stop();
  36       }, this._chargingStation._stationInfo.AutomaticTransactionGenerator.stopAfterHours * 3600 * 1000);
  37     }
  38     for (const connector in this._chargingStation._connectors) {
  39       if (connector > 0) {
  40         this.startConnector(connector);
  41       }
  42     }
  43     logger.info(this._logPrefix() + ' ATG started and will stop in ' + Utils.secondstoHHMMSS(this._chargingStation._stationInfo.AutomaticTransactionGenerator.stopAfterHours * 3600));
  44   }
  45
  46   async stop(reason = '') {
  47     logger.info(this._logPrefix() + ' ATG OVER => STOPPING ALL TRANSACTIONS');
  48     for (const connector in this._chargingStation._connectors) {
  49       if (this._chargingStation.getConnector(connector).transactionStarted) {
  50         logger.info(this._logPrefix(connector) + ' ATG OVER. Stop transaction ' + this._chargingStation.getConnector(connector).transactionId);
  51         await this._chargingStation.sendStopTransaction(this._chargingStation.getConnector(connector).transactionId, reason);
  52       }
  53     }
  54     this._timeToStop = true;
  55   }
  56
  57   async startConnector(connectorId) {
  58     do {
  59       const wait = Utils.getRandomInt(this._chargingStation._stationInfo.AutomaticTransactionGenerator.maxDelayBetweenTwoTransactions,
  60           this._chargingStation._stationInfo.AutomaticTransactionGenerator.minDelayBetweenTwoTransactions) * 1000;
  61       logger.info(this._logPrefix(connectorId) + ' wait for ' + Utils.secondstoHHMMSS(wait / 1000));
  62       await Utils.sleep(wait);
  63       if (this._timeToStop) {
  64         logger.debug(this._logPrefix(connectorId) + ' Entered in transaction loop while a request to stop it was made');
  65         break;
  66       }
  67       const start = Math.random();
  68       let skip = 0;
  69       if (start < this._chargingStation._stationInfo.AutomaticTransactionGenerator.probabilityOfStart) {
  70         skip = 0;
  71         // Start transaction
  72         let startResponse;
  73         if (this._chargingStation.getEnableStatistics()) {
  74           const startTransaction = performance.timerify(this.startTransaction);
  75           this._performanceObserver.observe({entryTypes: ['function']});
  76           startResponse = await startTransaction(connectorId, this);
  77         } else {
  78           startResponse = await this.startTransaction(connectorId, this);
  79         }
  80         if (startResponse.idTagInfo.status !== 'Accepted') {
  81           logger.info(this._logPrefix(connectorId) + ' transaction rejected');
  82           await Utils.sleep(Constants.CHARGING_STATION_ATG_WAIT_TIME);
  83         } else {
  84           // Wait until end of transaction
  85           const wait = Utils.getRandomInt(this._chargingStation._stationInfo.AutomaticTransactionGenerator.maxDuration,
  86               this._chargingStation._stationInfo.AutomaticTransactionGenerator.minDuration) * 1000;
  87           logger.info(this._logPrefix(connectorId) + ' transaction ' + this._chargingStation.getConnector(connectorId).transactionId + ' will stop in ' + Utils.secondstoHHMMSS(wait / 1000));
  88           await Utils.sleep(wait);
  89           // Stop transaction
  90           if (this._chargingStation.getConnector(connectorId).transactionStarted) {
  91             logger.info(this._logPrefix(connectorId) + ' stop transaction ' + this._chargingStation.getConnector(connectorId).transactionId);
  92             if (this._chargingStation.getEnableStatistics()) {
  93               const stopTransaction = performance.timerify(this.stopTransaction);
  94               this._performanceObserver.observe({entryTypes: ['function']});
  95               await stopTransaction(connectorId, this);
  96             } else {
  97               await this.stopTransaction(connectorId, this);
  98             }
  99           }
 100         }
 101       } else {
 102         skip++;
 103         logger.info(this._logPrefix(connectorId) + ' transaction skipped ' + skip);
 104       }
 105     } while (!this._timeToStop);
 106     logger.info(this._logPrefix(connectorId) + ' ATG STOPPED on the connector');
 107   }
 108
 109   // eslint-disable-next-line class-methods-use-this
 110   async startTransaction(connectorId, self) {
 111     if (self._chargingStation.hasAuthorizedTags()) {
 112       const tagId = self._chargingStation.getRandomTagId();
 113       logger.info(self._logPrefix(connectorId) + ' start transaction for tagID ' + tagId);
 114       return self._chargingStation.sendStartTransaction(connectorId, tagId);
 115     }
 116     return self._chargingStation.sendStartTransaction(connectorId);
 117   }
 118
 119   // eslint-disable-next-line class-methods-use-this
 120   async stopTransaction(connectorId, self) {
 121     await self._chargingStation.sendStopTransaction(self._chargingStation.getConnector(connectorId).transactionId);
 122   }
 123 }
 124
 125 module.exports = AutomaticTransactionGenerator;