src/charging-station/ChargingStationWorker.ts

   1 // Partial Copyright Jerome Benoit. 2021. All Rights Reserved.
   2
   3 import {
   4   ChargingStationWorkerData,
   5   ChargingStationWorkerMessage,
   6   ChargingStationWorkerMessageEvents,
   7 } from '../types/ChargingStationWorker';
   8 import { parentPort, workerData } from 'worker_threads';
   9
  10 import ChargingStation from './ChargingStation';
  11 import { ChargingStationUtils } from './ChargingStationUtils';
  12 import { ThreadWorker } from 'poolifier';
  13 import Utils from '../utils/Utils';
  14 import WorkerConstants from '../worker/WorkerConstants';
  15
  16 // Conditionally export ThreadWorker instance for pool usage
  17 export let threadWorker: ThreadWorker;
  18 if (ChargingStationUtils.workerPoolInUse()) {
  19   threadWorker = new ThreadWorker<ChargingStationWorkerData>(startChargingStation, {
  20     maxInactiveTime: WorkerConstants.POOL_MAX_INACTIVE_TIME,
  21     async: false,
  22   });
  23 } else {
  24   // Add message listener to start charging station from main thread
  25   addMessageListener();
  26   if (!Utils.isUndefined(workerData)) {
  27     startChargingStation(workerData as ChargingStationWorkerData);
  28   }
  29 }
  30
  31 /**
  32  * Listen messages send by the main thread
  33  */
  34 function addMessageListener(): void {
  35   parentPort?.on('message', (message: ChargingStationWorkerMessage) => {
  36     if (message.id === ChargingStationWorkerMessageEvents.START_WORKER_ELEMENT) {
  37       startChargingStation(message.data);
  38     }
  39   });
  40 }
  41
  42 /**
  43  * Create and start a charging station instance
  44  *
  45  * @param data workerData
  46  */
  47 function startChargingStation(data: ChargingStationWorkerData): void {
  48   const station = new ChargingStation(data.index, data.templateFile);
  49   station.start();
  50 }