import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy'
import type {
IWorkerChoiceStrategy,
- StrategyPolicy,
WorkerChoiceStrategyOptions
} from './selection-strategies-types'
>
extends AbstractWorkerChoiceStrategy<Worker, Data, Response>
implements IWorkerChoiceStrategy {
- /** @inheritDoc */
- public readonly strategyPolicy: StrategyPolicy = {
- useDynamicWorker: true
- }
-
/** @inheritDoc */
public constructor (
pool: IPool<Worker, Data, Response>,
/** @inheritDoc */
public reset (): boolean {
- this.nextWorkerNodeKey = 0
+ this.resetWorkerNodeKeyProperties()
return true
}
}
/** @inheritDoc */
- public choose (): number {
+ public choose (): number | undefined {
const chosenWorkerNodeKey = this.nextWorkerNodeKey
- do {
- this.roundRobinNextWorkerNodeKey()
- } while (!this.isWorkerNodeEligible(this.nextWorkerNodeKey))
+ this.setPreviousWorkerNodeKey(chosenWorkerNodeKey)
+ this.roundRobinNextWorkerNodeKey()
return chosenWorkerNodeKey
}
/** @inheritDoc */
public remove (workerNodeKey: number): boolean {
- if (this.nextWorkerNodeKey === workerNodeKey) {
- if (this.pool.workerNodes.length === 0) {
- this.nextWorkerNodeKey = 0
- } else if (this.nextWorkerNodeKey > this.pool.workerNodes.length - 1) {
- this.nextWorkerNodeKey = this.pool.workerNodes.length - 1
- }
+ if (this.pool.workerNodes.length === 0) {
+ this.reset()
+ }
+ if (
+ this.nextWorkerNodeKey === workerNodeKey &&
+ this.nextWorkerNodeKey > this.pool.workerNodes.length - 1
+ ) {
+ this.nextWorkerNodeKey = this.pool.workerNodes.length - 1
+ }
+ if (
+ this.previousWorkerNodeKey === workerNodeKey &&
+ this.previousWorkerNodeKey > this.pool.workerNodes.length - 1
+ ) {
+ this.previousWorkerNodeKey = this.pool.workerNodes.length - 1
}
return true
}
- private roundRobinNextWorkerNodeKey (): number {
+ private roundRobinNextWorkerNodeKey (): number | undefined {
this.nextWorkerNodeKey =
this.nextWorkerNodeKey === this.pool.workerNodes.length - 1
? 0
- : this.nextWorkerNodeKey + 1
+ : (this.nextWorkerNodeKey ?? this.previousWorkerNodeKey) + 1
return this.nextWorkerNodeKey
}
}