-import type { IPoolWorker } from '../pool-worker'
+import { DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS } from '../../utils'
+import type { IPool } from '../pool'
+import type { IWorker } from '../worker'
import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy'
+import type {
+ IWorkerChoiceStrategy,
+ WorkerChoiceStrategyOptions
+} from './selection-strategies-types'
/**
* Selects the next worker in a round robin fashion.
*
- * @template Worker Type of worker which manages the strategy.
- * @template Data Type of data sent to the worker. This can only be serializable data.
- * @template Response Type of response of execution. This can only be serializable data.
+ * @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.
*/
export class RoundRobinWorkerChoiceStrategy<
- Worker extends IPoolWorker,
- Data,
- Response
-> extends AbstractWorkerChoiceStrategy<Worker, Data, Response> {
+ Worker extends IWorker,
+ Data = unknown,
+ Response = unknown
+ >
+ extends AbstractWorkerChoiceStrategy<Worker, Data, Response>
+ implements IWorkerChoiceStrategy {
/**
- * Index for the next worker.
+ * Id of the next worker node.
*/
- private nextWorkerIndex: number = 0
+ private nextWorkerNodeId: number = 0
/** @inheritDoc */
- public resetStatistics (): boolean {
+ public constructor (
+ pool: IPool<Worker, Data, Response>,
+ opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+ ) {
+ super(pool, opts)
+ this.setRequiredStatistics(this.opts)
+ }
+
+ /** @inheritDoc */
+ public reset (): boolean {
+ this.nextWorkerNodeId = 0
return true
}
/** @inheritDoc */
- public choose (): Worker {
- const chosenWorker = this.pool.workers[this.nextWorkerIndex]
- this.nextWorkerIndex =
- this.nextWorkerIndex === this.pool.workers.length - 1
+ public update (): boolean {
+ return true
+ }
+
+ /** @inheritDoc */
+ public choose (): number {
+ const chosenWorkerNodeKey = this.nextWorkerNodeId
+ this.nextWorkerNodeId =
+ this.nextWorkerNodeId === this.pool.workerNodes.length - 1
? 0
- : this.nextWorkerIndex + 1
- return chosenWorker
+ : this.nextWorkerNodeId + 1
+ return chosenWorkerNodeKey
+ }
+
+ /** @inheritDoc */
+ public remove (workerNodeKey: number): boolean {
+ if (this.nextWorkerNodeId === 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
+ }
+ }
+ return true
}
}