| 1 | import { Worker, isMainThread } from 'worker_threads'; |
| 2 | import { WorkerOptions, WorkerProcessType } from '../types/Worker'; |
| 3 | |
| 4 | import Constants from '../utils/Constants'; |
| 5 | import { PoolOptions } from 'poolifier'; |
| 6 | import WorkerAbstract from './WorkerAbstract'; |
| 7 | import WorkerDynamicPool from './WorkerDynamicPool'; |
| 8 | import WorkerSet from './WorkerSet'; |
| 9 | import WorkerStaticPool from './WorkerStaticPool'; |
| 10 | |
| 11 | export default class WorkerFactory { |
| 12 | private constructor() { |
| 13 | // This is intentional |
| 14 | } |
| 15 | |
| 16 | public static getWorkerImplementation<T>(workerScript: string, workerProcessType: WorkerProcessType, options?: WorkerOptions): WorkerAbstract | null { |
| 17 | if (!isMainThread) { |
| 18 | throw new Error('Trying to get a worker implementation outside the main thread'); |
| 19 | } |
| 20 | options = options ?? {} as WorkerOptions; |
| 21 | options.startDelay = options?.startDelay ?? Constants.WORKER_START_DELAY; |
| 22 | options.poolOptions = options?.poolOptions ?? {} as PoolOptions<Worker>; |
| 23 | options?.messageHandler && (options.poolOptions.messageHandler = options.messageHandler); |
| 24 | let workerImplementation: WorkerAbstract = null; |
| 25 | switch (workerProcessType) { |
| 26 | case WorkerProcessType.WORKER_SET: |
| 27 | options.elementsPerWorker = options.elementsPerWorker ?? Constants.DEFAULT_CHARGING_STATIONS_PER_WORKER; |
| 28 | workerImplementation = new WorkerSet<T>(workerScript, options.elementsPerWorker, options.startDelay, options); |
| 29 | break; |
| 30 | case WorkerProcessType.STATIC_POOL: |
| 31 | options.poolMaxSize = options.poolMaxSize ?? Constants.DEFAULT_WORKER_POOL_MAX_SIZE; |
| 32 | workerImplementation = new WorkerStaticPool<T>(workerScript, options.poolMaxSize, options.startDelay, options.poolOptions); |
| 33 | break; |
| 34 | case WorkerProcessType.DYNAMIC_POOL: |
| 35 | options.poolMinSize = options.poolMinSize ?? Constants.DEFAULT_WORKER_POOL_MIN_SIZE; |
| 36 | options.poolMaxSize = options.poolMaxSize ?? Constants.DEFAULT_WORKER_POOL_MAX_SIZE; |
| 37 | workerImplementation = new WorkerDynamicPool<T>(workerScript, options.poolMinSize, options.poolMaxSize, options.startDelay, options.poolOptions); |
| 38 | break; |
| 39 | default: |
| 40 | throw new Error(`Worker implementation type '${workerProcessType}' not found`); |
| 41 | } |
| 42 | return workerImplementation; |
| 43 | } |
| 44 | } |