1 import type { IPool
} from
'../pool.js'
2 import type { IWorker
} from
'../worker.js'
3 import { AbstractWorkerChoiceStrategy
} from
'./abstract-worker-choice-strategy.js'
6 WorkerChoiceStrategyOptions
,
7 } from
'./selection-strategies-types.js'
10 * Selects the least used worker.
11 * @typeParam Worker - Type of worker which manages the strategy.
12 * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data.
13 * @typeParam Response - Type of execution response. This can only be structured-cloneable data.
15 export class LeastUsedWorkerChoiceStrategy
<
16 Worker
extends IWorker
,
20 extends AbstractWorkerChoiceStrategy
<Worker
, Data
, Response
>
21 implements IWorkerChoiceStrategy
{
24 pool
: IPool
<Worker
, Data
, Response
>,
25 opts
?: WorkerChoiceStrategyOptions
31 public reset (): boolean {
36 public update (): boolean {
41 public choose (): number | undefined {
42 this.setPreviousWorkerNodeKey(this.nextWorkerNodeKey
)
43 this.nextWorkerNodeKey
= this.leastUsedNextWorkerNodeKey()
44 return this.nextWorkerNodeKey
48 public remove (): boolean {
52 private leastUsedNextWorkerNodeKey (): number | undefined {
53 return this.pool
.workerNodes
.reduce(
54 (minWorkerNodeKey
, workerNode
, workerNodeKey
, workerNodes
) => {
55 return this.isWorkerNodeReady(workerNodeKey
) &&
56 workerNode
.usage
.tasks
.executing
+ workerNode
.usage
.tasks
.queued
<
57 workerNodes
[minWorkerNodeKey
].usage
.tasks
.executing
+
58 workerNodes
[minWorkerNodeKey
].usage
.tasks
.queued