1 import { DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
} from
'../../utils'
2 import type { IPool
} from
'../pool'
3 import type { IWorker
} from
'../worker'
4 import { AbstractWorkerChoiceStrategy
} from
'./abstract-worker-choice-strategy'
7 WorkerChoiceStrategyOptions
8 } from
'./selection-strategies-types'
11 * Selects the less used worker.
13 * @typeParam Worker - Type of worker which manages the strategy.
14 * @typeParam Data - Type of data sent to the worker. This can only be serializable data.
15 * @typeParam Response - Type of execution response. This can only be serializable data.
17 export class LessUsedWorkerChoiceStrategy
<
18 Worker
extends IWorker
,
22 extends AbstractWorkerChoiceStrategy
<Worker
, Data
, Response
>
23 implements IWorkerChoiceStrategy
{
26 pool
: IPool
<Worker
, Data
, Response
>,
27 opts
: WorkerChoiceStrategyOptions
= DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
30 this.checkOptions(this.opts
)
34 public reset (): boolean {
39 public choose (): number {
40 const freeWorkerNodeKey
= this.findFreeWorkerNodeKey()
41 if (freeWorkerNodeKey
!== -1) {
42 return freeWorkerNodeKey
44 let minNumberOfTasks
= Infinity
45 let lessUsedWorkerNodeKey
!: number
46 for (const [index
, workerNode
] of this.pool
.workerNodes
.entries()) {
47 const tasksUsage
= workerNode
.tasksUsage
48 const workerTasks
= tasksUsage
.run
+ tasksUsage
.running
49 if (workerTasks
=== 0) {
51 } else if (workerTasks
< minNumberOfTasks
) {
52 minNumberOfTasks
= workerTasks
53 lessUsedWorkerNodeKey
= index
56 return lessUsedWorkerNodeKey
60 public remove (workerNodeKey
: number): boolean {