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ea7a90d3 | 1 | import type { IPoolWorker } from '../pool-worker' |
bdaf31cd JB |
2 | import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy' |
3 | ||
4 | /** | |
5 | * Selects the less recently used worker. | |
6 | * | |
7 | * @template Worker Type of worker which manages the strategy. | |
8 | * @template Data Type of data sent to the worker. This can only be serializable data. | |
9 | * @template Response Type of response of execution. This can only be serializable data. | |
10 | */ | |
11 | export class LessRecentlyUsedWorkerChoiceStrategy< | |
ea7a90d3 | 12 | Worker extends IPoolWorker, |
bdaf31cd JB |
13 | Data, |
14 | Response | |
15 | > extends AbstractWorkerChoiceStrategy<Worker, Data, Response> { | |
ea7a90d3 | 16 | /** @inheritDoc */ |
a6f7f1b4 | 17 | public reset (): boolean { |
ea7a90d3 JB |
18 | return true |
19 | } | |
20 | ||
a76fac14 | 21 | /** @inheritDoc */ |
bdaf31cd JB |
22 | public choose (): Worker { |
23 | let minNumberOfRunningTasks = Infinity | |
24 | // A worker is always found because it picks the one with fewer tasks | |
25 | let lessRecentlyUsedWorker!: Worker | |
26 | for (const worker of this.pool.workers) { | |
1399f858 JB |
27 | const workerRunningTasks = this.pool.getWorkerRunningTasks( |
28 | worker | |
29 | ) as number | |
78cea37e | 30 | if (!this.isDynamicPool && workerRunningTasks === 0) { |
bdaf31cd | 31 | return worker |
1399f858 | 32 | } else if (workerRunningTasks < minNumberOfRunningTasks) { |
bdaf31cd JB |
33 | lessRecentlyUsedWorker = worker |
34 | minNumberOfRunningTasks = workerRunningTasks | |
35 | } | |
36 | } | |
37 | return lessRecentlyUsedWorker | |
38 | } | |
39 | } |