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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 next worker in a round robin fashion. | |
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 RoundRobinWorkerChoiceStrategy< | |
ea7a90d3 | 12 | Worker extends IPoolWorker, |
bdaf31cd JB |
13 | Data, |
14 | Response | |
15 | > extends AbstractWorkerChoiceStrategy<Worker, Data, Response> { | |
16 | /** | |
17 | * Index for the next worker. | |
18 | */ | |
19 | private nextWorkerIndex: number = 0 | |
20 | ||
38e795c1 | 21 | /** {@inheritDoc} */ |
a6f7f1b4 JB |
22 | public reset (): boolean { |
23 | this.nextWorkerIndex = 0 | |
ea7a90d3 JB |
24 | return true |
25 | } | |
26 | ||
38e795c1 | 27 | /** {@inheritDoc} */ |
bdaf31cd JB |
28 | public choose (): Worker { |
29 | const chosenWorker = this.pool.workers[this.nextWorkerIndex] | |
30 | this.nextWorkerIndex = | |
31 | this.nextWorkerIndex === this.pool.workers.length - 1 | |
32 | ? 0 | |
33 | : this.nextWorkerIndex + 1 | |
34 | return chosenWorker | |
35 | } | |
36 | } |