Data = unknown,
Response = unknown
> {
- private readonly workerChoiceStrategies = new Map<
+ private readonly workerChoiceStrategies: Map<
WorkerChoiceStrategy,
- IWorkerChoiceStrategy<Worker, Data, Response>
- >()
+ IWorkerChoiceStrategy
+ >
/**
* Worker choice strategy context constructor.
*/
public constructor (
pool: IPoolInternal<Worker, Data, Response>,
- private readonly createWorkerCallback: () => number,
private workerChoiceStrategyType: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN
) {
this.execute.bind(this)
- this.registerWorkerChoiceStrategy(pool, workerChoiceStrategyType)
+ this.workerChoiceStrategies = new Map<
+ WorkerChoiceStrategy,
+ IWorkerChoiceStrategy
+ >([
+ [
+ WorkerChoiceStrategies.ROUND_ROBIN,
+ new RoundRobinWorkerChoiceStrategy<Worker, Data, Response>(pool)
+ ],
+ [
+ WorkerChoiceStrategies.LESS_USED,
+ new LessUsedWorkerChoiceStrategy<Worker, Data, Response>(pool)
+ ],
+ [
+ WorkerChoiceStrategies.LESS_BUSY,
+ new LessBusyWorkerChoiceStrategy<Worker, Data, Response>(pool)
+ ],
+ [
+ WorkerChoiceStrategies.FAIR_SHARE,
+ new FairShareWorkerChoiceStrategy<Worker, Data, Response>(pool)
+ ],
+ [
+ WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN,
+ new WeightedRoundRobinWorkerChoiceStrategy<Worker, Data, Response>(pool)
+ ]
+ ])
}
/**
return (
this.workerChoiceStrategies.get(
this.workerChoiceStrategyType
- ) as IWorkerChoiceStrategy<Worker, Data, Response>
+ ) as IWorkerChoiceStrategy
).requiredStatistics
}
* @param workerChoiceStrategy - The worker choice strategy to set.
*/
public setWorkerChoiceStrategy (
- pool: IPoolInternal<Worker, Data, Response>,
workerChoiceStrategy: WorkerChoiceStrategy
): void {
- if (this.workerChoiceStrategyType === workerChoiceStrategy) {
- this.workerChoiceStrategies.get(workerChoiceStrategy)?.reset()
- } else {
+ if (this.workerChoiceStrategyType !== workerChoiceStrategy) {
this.workerChoiceStrategyType = workerChoiceStrategy
- this.registerWorkerChoiceStrategy(pool, workerChoiceStrategy)
}
+ this.workerChoiceStrategies.get(this.workerChoiceStrategyType)?.reset()
}
/**
* @returns The key of the chosen one.
*/
public execute (): number {
- const workerChoiceStrategy = this.workerChoiceStrategies.get(
- this.workerChoiceStrategyType
- ) as IWorkerChoiceStrategy<Worker, Data, Response>
- if (
- workerChoiceStrategy.isDynamicPool &&
- !workerChoiceStrategy.pool.full &&
- workerChoiceStrategy.pool.findFreeWorkerKey() === -1
- ) {
- return this.createWorkerCallback()
- }
- return workerChoiceStrategy.choose()
+ return (
+ this.workerChoiceStrategies.get(
+ this.workerChoiceStrategyType
+ ) as IWorkerChoiceStrategy
+ ).choose()
}
/**
return (
this.workerChoiceStrategies.get(
this.workerChoiceStrategyType
- ) as IWorkerChoiceStrategy<Worker, Data, Response>
+ ) as IWorkerChoiceStrategy
).remove(workerKey)
}
-
- private registerWorkerChoiceStrategy (
- pool: IPoolInternal<Worker, Data, Response>,
- workerChoiceStrategy: WorkerChoiceStrategy
- ): void {
- if (!this.workerChoiceStrategies.has(workerChoiceStrategy)) {
- this.workerChoiceStrategies.set(
- workerChoiceStrategy,
- this.getWorkerChoiceStrategy(pool, workerChoiceStrategy)
- )
- }
- }
-
- /**
- * Gets the worker choice strategy instance.
- *
- * @param pool - The pool instance.
- * @param workerChoiceStrategy - The worker choice strategy.
- * @returns The worker choice strategy instance.
- */
- private getWorkerChoiceStrategy (
- pool: IPoolInternal<Worker, Data, Response>,
- workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN
- ): IWorkerChoiceStrategy<Worker, Data, Response> {
- switch (workerChoiceStrategy) {
- case WorkerChoiceStrategies.ROUND_ROBIN:
- return new RoundRobinWorkerChoiceStrategy<Worker, Data, Response>(pool)
- case WorkerChoiceStrategies.LESS_USED:
- return new LessUsedWorkerChoiceStrategy<Worker, Data, Response>(pool)
- case WorkerChoiceStrategies.LESS_BUSY:
- return new LessBusyWorkerChoiceStrategy<Worker, Data, Response>(pool)
- case WorkerChoiceStrategies.FAIR_SHARE:
- return new FairShareWorkerChoiceStrategy<Worker, Data, Response>(pool)
- case WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN:
- return new WeightedRoundRobinWorkerChoiceStrategy<
- Worker,
- Data,
- Response
- >(pool)
- default:
- throw new Error(
- // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
- `Worker choice strategy '${workerChoiceStrategy}' not found`
- )
- }
- }
}