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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 | * | |
38e795c1 JB |
7 | * @typeParam Worker - Type of worker which manages the strategy. |
8 | * @typeParam Data - Type of data sent to the worker. This can only be serializable data. | |
9 | * @typeParam Response - Type of response of execution. This can only be serializable data. | |
bdaf31cd JB |
10 | */ |
11 | export class LessRecentlyUsedWorkerChoiceStrategy< | |
ea7a90d3 | 12 | Worker extends IPoolWorker, |
bdaf31cd JB |
13 | Data, |
14 | Response | |
15 | > extends AbstractWorkerChoiceStrategy<Worker, Data, Response> { | |
38e795c1 | 16 | /** {@inheritDoc} */ |
a6f7f1b4 | 17 | public reset (): boolean { |
ea7a90d3 JB |
18 | return true |
19 | } | |
20 | ||
38e795c1 | 21 | /** {@inheritDoc} */ |
bdaf31cd | 22 | public choose (): Worker { |
f4ff1ce2 | 23 | let minNumberOfTasks = Infinity |
bdaf31cd JB |
24 | // A worker is always found because it picks the one with fewer tasks |
25 | let lessRecentlyUsedWorker!: Worker | |
ffcbbad8 JB |
26 | for (const value of this.pool.workers.values()) { |
27 | const worker = value.worker | |
3032893a | 28 | const tasksUsage = this.pool.getWorkerTasksUsage(worker) |
f4ff1ce2 | 29 | const workerTasks = |
3032893a | 30 | (tasksUsage?.run as number) + (tasksUsage?.running as number) |
f4ff1ce2 | 31 | if (!this.isDynamicPool && workerTasks === 0) { |
bdaf31cd | 32 | return worker |
f4ff1ce2 JB |
33 | } else if (workerTasks < minNumberOfTasks) { |
34 | minNumberOfTasks = workerTasks | |
bdaf31cd | 35 | lessRecentlyUsedWorker = worker |
bdaf31cd JB |
36 | } |
37 | } | |
38 | return lessRecentlyUsedWorker | |
39 | } | |
40 | } |