import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy'
import type {
IWorkerChoiceStrategy,
+ StrategyPolicy,
WorkerChoiceStrategyOptions
} from './selection-strategies-types'
* Selects the next worker in a round robin fashion.
*
* @typeParam Worker - Type of worker which manages the strategy.
- * @typeParam Data - Type of data sent to the worker. This can only be serializable data.
- * @typeParam Response - Type of execution response. This can only be serializable data.
+ * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data.
+ * @typeParam Response - Type of execution response. This can only be structured-cloneable data.
*/
export class RoundRobinWorkerChoiceStrategy<
Worker extends IWorker,
>
extends AbstractWorkerChoiceStrategy<Worker, Data, Response>
implements IWorkerChoiceStrategy {
- /**
- * Id of the next worker node.
- */
- private nextWorkerNodeId: number = 0
+ /** @inheritDoc */
+ public readonly strategyPolicy: StrategyPolicy = {
+ useDynamicWorker: true
+ }
/** @inheritDoc */
public constructor (
/** @inheritDoc */
public reset (): boolean {
- this.nextWorkerNodeId = 0
+ this.nextWorkerNodeKey = 0
return true
}
/** @inheritDoc */
public choose (): number {
- const chosenWorkerNodeKey = this.nextWorkerNodeId
- this.nextWorkerNodeId =
- this.nextWorkerNodeId === this.pool.workerNodes.length - 1
- ? 0
- : this.nextWorkerNodeId + 1
+ const chosenWorkerNodeKey = this.nextWorkerNodeKey
+ do {
+ this.roundRobinNextWorkerNodeKey()
+ } while (!this.isWorkerNodeReady(this.nextWorkerNodeKey))
return chosenWorkerNodeKey
}
/** @inheritDoc */
public remove (workerNodeKey: number): boolean {
- if (this.nextWorkerNodeId === workerNodeKey) {
+ if (this.nextWorkerNodeKey === workerNodeKey) {
if (this.pool.workerNodes.length === 0) {
- this.nextWorkerNodeId = 0
- } else if (this.nextWorkerNodeId > this.pool.workerNodes.length - 1) {
- this.nextWorkerNodeId = this.pool.workerNodes.length - 1
+ this.nextWorkerNodeKey = 0
+ } else if (this.nextWorkerNodeKey > this.pool.workerNodes.length - 1) {
+ this.nextWorkerNodeKey = this.pool.workerNodes.length - 1
}
}
return true
}
+
+ private roundRobinNextWorkerNodeKey (): number {
+ this.nextWorkerNodeKey =
+ this.nextWorkerNodeKey === this.pool.workerNodes.length - 1
+ ? 0
+ : this.nextWorkerNodeKey + 1
+ return this.nextWorkerNodeKey
+ }
}