-import { WorkerOptions, WorkerProcessType } from '../types/Worker';
+import { Worker, isMainThread } from 'worker_threads';
-import Constants from '../utils/Constants';
-import WorkerAbstract from './WorkerAbstract';
+import type { PoolOptions } from 'poolifier';
+
+import { WorkerData, WorkerOptions, WorkerProcessType } from '../types/Worker';
+import type WorkerAbstract from './WorkerAbstract';
+import WorkerConstants from './WorkerConstants';
import WorkerDynamicPool from './WorkerDynamicPool';
import WorkerSet from './WorkerSet';
import WorkerStaticPool from './WorkerStaticPool';
-import { isMainThread } from 'worker_threads';
export default class WorkerFactory {
- private static workerImplementation: WorkerAbstract | null;
-
- private constructor() {}
+ private constructor() {
+ // This is intentional
+ }
- public static getWorkerImplementation<T>(workerScript: string, workerProcessType: WorkerProcessType, options?: WorkerOptions, forceInstantiation = false): WorkerAbstract | null {
+ public static getWorkerImplementation<T extends WorkerData>(
+ workerScript: string,
+ workerProcessType: WorkerProcessType,
+ workerOptions?: WorkerOptions
+ ): WorkerAbstract<T> | null {
if (!isMainThread) {
- throw new Error('Trying to get a worker implementation outside the main thread');
+ throw new Error('Cannot get a worker implementation outside the main thread');
}
- if (!WorkerFactory.workerImplementation || forceInstantiation) {
- options = options ?? {} as WorkerOptions;
- options.startDelay = options.startDelay ?? Constants.WORKER_START_DELAY;
- WorkerFactory.workerImplementation = null;
- switch (workerProcessType) {
- case WorkerProcessType.WORKER_SET:
- options.elementsPerWorker = options.elementsPerWorker ?? Constants.DEFAULT_CHARGING_STATIONS_PER_WORKER;
- WorkerFactory.workerImplementation = new WorkerSet<T>(workerScript, options.elementsPerWorker, options.startDelay);
- break;
- case WorkerProcessType.STATIC_POOL:
- options.poolMaxSize = options.poolMaxSize ?? Constants.DEFAULT_WORKER_POOL_MAX_SIZE;
- WorkerFactory.workerImplementation = new WorkerStaticPool<T>(workerScript, options.poolMaxSize, options.startDelay, options.poolOptions);
- break;
- case WorkerProcessType.DYNAMIC_POOL:
- options.poolMinSize = options.poolMinSize ?? Constants.DEFAULT_WORKER_POOL_MIN_SIZE;
- options.poolMaxSize = options.poolMaxSize ?? Constants.DEFAULT_WORKER_POOL_MAX_SIZE;
- WorkerFactory.workerImplementation = new WorkerDynamicPool<T>(workerScript, options.poolMinSize, options.poolMaxSize, options.startDelay, options.poolOptions);
- break;
- }
+ workerOptions = workerOptions ?? ({} as WorkerOptions);
+ workerOptions.workerStartDelay =
+ workerOptions?.workerStartDelay ?? WorkerConstants.DEFAULT_WORKER_START_DELAY;
+ workerOptions.elementStartDelay =
+ workerOptions?.elementStartDelay ?? WorkerConstants.DEFAULT_ELEMENT_START_DELAY;
+ workerOptions.poolOptions = workerOptions?.poolOptions ?? ({} as PoolOptions<Worker>);
+ workerOptions?.messageHandler &&
+ // eslint-disable-next-line @typescript-eslint/no-misused-promises
+ (workerOptions.poolOptions.messageHandler = workerOptions.messageHandler);
+ let workerImplementation: WorkerAbstract<T> = null;
+ switch (workerProcessType) {
+ case WorkerProcessType.WORKER_SET:
+ workerOptions.elementsPerWorker =
+ workerOptions?.elementsPerWorker ?? WorkerConstants.DEFAULT_ELEMENTS_PER_WORKER;
+ workerImplementation = new WorkerSet(workerScript, workerOptions);
+ break;
+ case WorkerProcessType.STATIC_POOL:
+ workerOptions.poolMaxSize =
+ workerOptions?.poolMaxSize ?? WorkerConstants.DEFAULT_POOL_MAX_SIZE;
+ workerImplementation = new WorkerStaticPool(workerScript, workerOptions);
+ break;
+ case WorkerProcessType.DYNAMIC_POOL:
+ workerOptions.poolMinSize =
+ workerOptions?.poolMinSize ?? WorkerConstants.DEFAULT_POOL_MIN_SIZE;
+ workerOptions.poolMaxSize =
+ workerOptions?.poolMaxSize ?? WorkerConstants.DEFAULT_POOL_MAX_SIZE;
+ workerImplementation = new WorkerDynamicPool(workerScript, workerOptions);
+ break;
+ default:
+ // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
+ throw new Error(`Worker implementation type '${workerProcessType}' not found`);
}
- return WorkerFactory.workerImplementation;
+ return workerImplementation;
}
}