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ea7a90d3 | 1 | import type { IPoolWorker } from '../pool-worker' |
bdaf31cd | 2 | import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy' |
bf90656c | 3 | import type { IWorkerChoiceStrategy } from './selection-strategies-types' |
bdaf31cd JB |
4 | |
5 | /** | |
737c6d97 | 6 | * Selects the less used worker. |
bdaf31cd | 7 | * |
38e795c1 JB |
8 | * @typeParam Worker - Type of worker which manages the strategy. |
9 | * @typeParam Data - Type of data sent to the worker. This can only be serializable data. | |
10 | * @typeParam Response - Type of response of execution. This can only be serializable data. | |
bdaf31cd | 11 | */ |
737c6d97 | 12 | export class LessUsedWorkerChoiceStrategy< |
bf90656c | 13 | Worker extends IPoolWorker, |
b2b1d84e JB |
14 | Data = unknown, |
15 | Response = unknown | |
bf90656c JB |
16 | > |
17 | extends AbstractWorkerChoiceStrategy<Worker, Data, Response> | |
3300e7bc | 18 | implements IWorkerChoiceStrategy<Worker, Data, Response> { |
38e795c1 | 19 | /** {@inheritDoc} */ |
a6f7f1b4 | 20 | public reset (): boolean { |
ea7a90d3 JB |
21 | return true |
22 | } | |
23 | ||
38e795c1 | 24 | /** {@inheritDoc} */ |
c923ce56 | 25 | public choose (): number { |
c141008c | 26 | const freeWorkerKey = this.pool.findFreeWorkerKey() |
965415bb | 27 | if (freeWorkerKey !== -1) { |
c141008c JB |
28 | return freeWorkerKey |
29 | } | |
f4ff1ce2 | 30 | let minNumberOfTasks = Infinity |
c923ce56 JB |
31 | let lessUsedWorkerKey!: number |
32 | for (const [index, workerItem] of this.pool.workers.entries()) { | |
33 | const tasksUsage = workerItem.tasksUsage | |
34 | const workerTasks = tasksUsage?.run + tasksUsage?.running | |
cf9c7b65 | 35 | if (workerTasks === 0) { |
c923ce56 | 36 | return index |
f4ff1ce2 JB |
37 | } else if (workerTasks < minNumberOfTasks) { |
38 | minNumberOfTasks = workerTasks | |
c923ce56 | 39 | lessUsedWorkerKey = index |
bdaf31cd JB |
40 | } |
41 | } | |
c923ce56 | 42 | return lessUsedWorkerKey |
bdaf31cd | 43 | } |
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44 | |
45 | /** {@inheritDoc} */ | |
46 | public remove (workerKey: number): boolean { | |
47 | return true | |
48 | } | |
bdaf31cd | 49 | } |