src/pools/selection-strategies/selection-strategies-utils.ts

   1 import type { AbstractPoolWorker } from '../abstract-pool-worker'
   2 import type { IPoolInternal } from '../pool-internal'
   3 import { LessRecentlyUsedWorkerChoiceStrategy } from './less-recently-used-worker-choice-strategy'
   4 import { RoundRobinWorkerChoiceStrategy } from './round-robin-worker-choice-strategy'
   5 import type {
   6   IWorkerChoiceStrategy,
   7   WorkerChoiceStrategy
   8 } from './selection-strategies-types'
   9 import { WorkerChoiceStrategies } from './selection-strategies-types'
  10
  11 /**
  12  * Worker selection strategies helpers class.
  13  */
  14 export class SelectionStrategiesUtils {
  15   /**
  16    * Get the worker choice strategy instance.
  17    *
  18    * @param pool The pool instance.
  19    * @param workerChoiceStrategy The worker choice strategy.
  20    * @returns The worker choice strategy instance.
  21    */
  22   public static getWorkerChoiceStrategy<
  23     Worker extends AbstractPoolWorker,
  24     Data,
  25     Response
  26   > (
  27     pool: IPoolInternal<Worker, Data, Response>,
  28     workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN
  29   ): IWorkerChoiceStrategy<Worker> {
  30     switch (workerChoiceStrategy) {
  31       case WorkerChoiceStrategies.ROUND_ROBIN:
  32         return new RoundRobinWorkerChoiceStrategy(pool)
  33       case WorkerChoiceStrategies.LESS_RECENTLY_USED:
  34         return new LessRecentlyUsedWorkerChoiceStrategy(pool)
  35       default:
  36         throw new Error(
  37           // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
  38           `Worker choice strategy '${workerChoiceStrategy}' not found`
  39         )
  40     }
  41   }
  42 }