import type { IWorker } from '../worker'
import type { IPool } from '../pool'
-import {
- DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
- DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
-} from '../../utils'
+import { DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS } from '../../utils'
import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy'
import type {
IWorkerChoiceStrategy,
- StrategyPolicy,
- TaskStatisticsRequirements,
- WorkerChoiceStrategyOptions
+ InternalWorkerChoiceStrategyOptions,
+ TaskStatisticsRequirements
} from './selection-strategies-types'
/**
>
extends AbstractWorkerChoiceStrategy<Worker, Data, Response>
implements IWorkerChoiceStrategy {
- /** @inheritDoc */
- public readonly strategyPolicy: StrategyPolicy = {
- useDynamicWorker: true
- }
-
/** @inheritDoc */
public readonly taskStatisticsRequirements: TaskStatisticsRequirements = {
runTime: {
}
/**
- * Default worker weight.
- */
- private readonly defaultWorkerWeight: number
- /**
- * Worker virtual task runtime.
+ * Worker node virtual task runtime.
*/
- private workerVirtualTaskRunTime: number = 0
+ private workerNodeVirtualTaskRunTime: number = 0
/** @inheritDoc */
public constructor (
pool: IPool<Worker, Data, Response>,
- opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+ opts: InternalWorkerChoiceStrategyOptions
) {
super(pool, opts)
this.setTaskStatisticsRequirements(this.opts)
- this.defaultWorkerWeight = this.computeDefaultWorkerWeight()
}
/** @inheritDoc */
public reset (): boolean {
- this.nextWorkerNodeKey = 0
- this.workerVirtualTaskRunTime = 0
+ this.resetWorkerNodeKeyProperties()
+ this.workerNodeVirtualTaskRunTime = 0
return true
}
}
/** @inheritDoc */
- public choose (): number {
- const chosenWorkerNodeKey = this.nextWorkerNodeKey
- do {
- this.weightedRoundRobinNextWorkerNodeKey()
- } while (!this.isWorkerNodeEligible(this.nextWorkerNodeKey))
- return chosenWorkerNodeKey
+ public choose (): number | undefined {
+ this.setPreviousWorkerNodeKey(this.nextWorkerNodeKey)
+ this.weightedRoundRobinNextWorkerNodeKey()
+ this.checkNextWorkerNodeReadiness()
+ return this.nextWorkerNodeKey
}
/** @inheritDoc */
public remove (workerNodeKey: number): boolean {
+ if (this.pool.workerNodes.length === 0) {
+ this.reset()
+ }
if (this.nextWorkerNodeKey === workerNodeKey) {
- if (this.pool.workerNodes.length === 0) {
- this.nextWorkerNodeKey = 0
- } else if (this.nextWorkerNodeKey > this.pool.workerNodes.length - 1) {
+ this.workerNodeVirtualTaskRunTime = 0
+ if (this.nextWorkerNodeKey > this.pool.workerNodes.length - 1) {
this.nextWorkerNodeKey = this.pool.workerNodes.length - 1
}
- this.workerVirtualTaskRunTime = 0
+ }
+ if (
+ this.previousWorkerNodeKey === workerNodeKey &&
+ this.previousWorkerNodeKey > this.pool.workerNodes.length - 1
+ ) {
+ this.previousWorkerNodeKey = this.pool.workerNodes.length - 1
}
return true
}
- private weightedRoundRobinNextWorkerNodeKey (): number {
- const workerVirtualTaskRunTime = this.workerVirtualTaskRunTime
- const workerWeight =
- this.opts.weights?.[this.nextWorkerNodeKey] ?? this.defaultWorkerWeight
- if (workerVirtualTaskRunTime < workerWeight) {
- this.workerVirtualTaskRunTime =
- workerVirtualTaskRunTime +
- this.getWorkerTaskRunTime(this.nextWorkerNodeKey)
+ private weightedRoundRobinNextWorkerNodeKey (): number | undefined {
+ const workerWeight = this.opts.weights?.[
+ this.nextWorkerNodeKey ?? this.previousWorkerNodeKey
+ ] as number
+ if (this.workerNodeVirtualTaskRunTime < workerWeight) {
+ this.workerNodeVirtualTaskRunTime =
+ this.workerNodeVirtualTaskRunTime +
+ this.getWorkerNodeTaskRunTime(
+ this.nextWorkerNodeKey ?? this.previousWorkerNodeKey
+ )
} else {
this.nextWorkerNodeKey =
this.nextWorkerNodeKey === this.pool.workerNodes.length - 1
? 0
- : this.nextWorkerNodeKey + 1
- this.workerVirtualTaskRunTime = 0
+ : (this.nextWorkerNodeKey ?? this.previousWorkerNodeKey) + 1
+ this.workerNodeVirtualTaskRunTime = 0
}
return this.nextWorkerNodeKey
}