-import {
- DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
- 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 { IPool } from '../pool.js'
+import { DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS } from '../utils.js'
+import type { IWorker } from '../worker.js'
+import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy.js'
import type {
IWorkerChoiceStrategy,
TaskStatisticsRequirements,
- WorkerChoiceStrategyOptions
-} from './selection-strategies-types'
+ WorkerChoiceStrategyOptions,
+} from './selection-strategies-types.js'
/**
* Selects the worker with the least ELU.
- *
* @typeParam Worker - Type of worker which manages the strategy.
* @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.
elu: {
aggregate: true,
average: false,
- median: false
- }
+ median: false,
+ },
}
/** @inheritDoc */
public constructor (
pool: IPool<Worker, Data, Response>,
- opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+ opts?: WorkerChoiceStrategyOptions
) {
super(pool, opts)
this.setTaskStatisticsRequirements(this.opts)
}
/** @inheritDoc */
- public choose (): number {
- return this.leastEluNextWorkerNodeKey()
+ public choose (): number | undefined {
+ this.setPreviousWorkerNodeKey(this.nextWorkerNodeKey)
+ this.nextWorkerNodeKey = this.leastEluNextWorkerNodeKey()
+ return this.nextWorkerNodeKey
}
/** @inheritDoc */
return true
}
- private leastEluNextWorkerNodeKey (): number {
- let minWorkerElu = Infinity
- for (const [workerNodeKey, workerNode] of this.pool.workerNodes.entries()) {
- const workerUsage = workerNode.usage
- const workerElu = workerUsage.elu?.active?.aggregate ?? 0
- if (this.isWorkerNodeEligible(workerNodeKey) && workerElu === 0) {
- this.nextWorkerNodeKey = workerNodeKey
- break
- } else if (
- this.isWorkerNodeEligible(workerNodeKey) &&
- workerElu < minWorkerElu
- ) {
- minWorkerElu = workerElu
- this.nextWorkerNodeKey = workerNodeKey
- }
- }
- return this.nextWorkerNodeKey
+ private leastEluNextWorkerNodeKey (): number | undefined {
+ return this.pool.workerNodes.reduce(
+ (minWorkerNodeKey, workerNode, workerNodeKey, workerNodes) => {
+ return this.isWorkerNodeReady(workerNodeKey) &&
+ (workerNode.usage.elu.active.aggregate ?? 0) <
+ (workerNodes[minWorkerNodeKey].usage.elu.active.aggregate ?? 0)
+ ? workerNodeKey
+ : minWorkerNodeKey
+ },
+ 0
+ )
}
}