+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,
- RequiredStatistics
+ RequiredStatistics,
+ WorkerChoiceStrategyOptions
} from './selection-strategies-types'
/**
*/
interface WorkerVirtualTaskTimestamp {
start: number
- end: number
+ end?: number
}
/**
*
* @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 response of execution. This can only be serializable data.
+ * @typeParam Response - Type of execution response. This can only be serializable data.
*/
export class FairShareWorkerChoiceStrategy<
Worker extends IWorker,
}
/**
- * Worker last virtual task execution timestamp.
+ * Workers' virtual task execution timestamp.
*/
- private readonly workerLastVirtualTaskTimestamp: Map<
- number,
- WorkerVirtualTaskTimestamp
- > = new Map<number, WorkerVirtualTaskTimestamp>()
+ private workersVirtualTaskTimestamp: WorkerVirtualTaskTimestamp[] = []
+
+ /** @inheritDoc */
+ public constructor (
+ pool: IPool<Worker, Data, Response>,
+ opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+ ) {
+ super(pool, opts)
+ this.checkOptions(this.opts)
+ }
/** @inheritDoc */
public reset (): boolean {
- this.workerLastVirtualTaskTimestamp.clear()
+ this.workersVirtualTaskTimestamp = []
+ return true
+ }
+
+ /** @inheritDoc */
+ public update (workerNodeKey: number): boolean {
+ this.computeWorkerVirtualTaskTimestamp(workerNodeKey)
return true
}
public choose (): number {
let minWorkerVirtualTaskEndTimestamp = Infinity
let chosenWorkerNodeKey!: number
- for (const [index] of this.pool.workerNodes.entries()) {
- this.computeWorkerLastVirtualTaskTimestamp(index)
- const workerLastVirtualTaskEndTimestamp =
- this.workerLastVirtualTaskTimestamp.get(index)?.end ?? 0
- if (
- workerLastVirtualTaskEndTimestamp < minWorkerVirtualTaskEndTimestamp
- ) {
- minWorkerVirtualTaskEndTimestamp = workerLastVirtualTaskEndTimestamp
- chosenWorkerNodeKey = index
+ for (const [workerNodeKey] of this.pool.workerNodes.entries()) {
+ const workerVirtualTaskEndTimestamp =
+ this.workersVirtualTaskTimestamp[workerNodeKey]?.end ?? 0
+ if (workerVirtualTaskEndTimestamp < minWorkerVirtualTaskEndTimestamp) {
+ minWorkerVirtualTaskEndTimestamp = workerVirtualTaskEndTimestamp
+ chosenWorkerNodeKey = workerNodeKey
}
}
return chosenWorkerNodeKey
/** @inheritDoc */
public remove (workerNodeKey: number): boolean {
- const deleted = this.workerLastVirtualTaskTimestamp.delete(workerNodeKey)
- for (const [key, value] of this.workerLastVirtualTaskTimestamp.entries()) {
- if (key > workerNodeKey) {
- this.workerLastVirtualTaskTimestamp.set(key - 1, value)
- }
- }
- return deleted
+ this.workersVirtualTaskTimestamp.splice(workerNodeKey, 1)
+ return true
}
/**
- * Computes worker last virtual task timestamp.
+ * Computes worker virtual task timestamp.
*
* @param workerNodeKey - The worker node key.
*/
- private computeWorkerLastVirtualTaskTimestamp (workerNodeKey: number): void {
+ private computeWorkerVirtualTaskTimestamp (workerNodeKey: number): void {
const workerVirtualTaskStartTimestamp = Math.max(
performance.now(),
- this.workerLastVirtualTaskTimestamp.get(workerNodeKey)?.end ?? -Infinity
+ this.workersVirtualTaskTimestamp[workerNodeKey]?.end ?? -Infinity
)
const workerVirtualTaskTRunTime = this.requiredStatistics.medRunTime
? this.pool.workerNodes[workerNodeKey].tasksUsage.medRunTime
: this.pool.workerNodes[workerNodeKey].tasksUsage.avgRunTime
- this.workerLastVirtualTaskTimestamp.set(workerNodeKey, {
+ this.workersVirtualTaskTimestamp[workerNodeKey] = {
start: workerVirtualTaskStartTimestamp,
- end: workerVirtualTaskStartTimestamp + (workerVirtualTaskTRunTime ?? 0)
- })
+ end: workerVirtualTaskStartTimestamp + workerVirtualTaskTRunTime
+ }
}
}