Commit | Line | Data |
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f06e48d8 | 1 | import type { IWorker } from '../worker' |
bdaf31cd | 2 | import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy' |
bf90656c | 3 | import type { IWorkerChoiceStrategy } from './selection-strategies-types' |
bdaf31cd JB |
4 | |
5 | /** | |
6 | * Selects the next worker in a round robin fashion. | |
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 JB |
11 | */ |
12 | export class RoundRobinWorkerChoiceStrategy< | |
f06e48d8 | 13 | Worker extends IWorker, |
b2b1d84e JB |
14 | Data = unknown, |
15 | Response = unknown | |
bf90656c JB |
16 | > |
17 | extends AbstractWorkerChoiceStrategy<Worker, Data, Response> | |
17393ac8 | 18 | implements IWorkerChoiceStrategy { |
bdaf31cd | 19 | /** |
f06e48d8 | 20 | * Id of the next worker node. |
bdaf31cd | 21 | */ |
f06e48d8 | 22 | private nextWorkerNodeId: number = 0 |
bdaf31cd | 23 | |
afc003b2 | 24 | /** @inheritDoc */ |
a6f7f1b4 | 25 | public reset (): boolean { |
f06e48d8 | 26 | this.nextWorkerNodeId = 0 |
ea7a90d3 JB |
27 | return true |
28 | } | |
29 | ||
afc003b2 | 30 | /** @inheritDoc */ |
c923ce56 | 31 | public choose (): number { |
f06e48d8 JB |
32 | const chosenWorkerNodeKey = this.nextWorkerNodeId |
33 | this.nextWorkerNodeId = | |
34 | this.nextWorkerNodeId === this.pool.workerNodes.length - 1 | |
bdaf31cd | 35 | ? 0 |
f06e48d8 JB |
36 | : this.nextWorkerNodeId + 1 |
37 | return chosenWorkerNodeKey | |
bdaf31cd | 38 | } |
97a2abc3 | 39 | |
afc003b2 | 40 | /** @inheritDoc */ |
f06e48d8 JB |
41 | public remove (workerNodeKey: number): boolean { |
42 | if (this.nextWorkerNodeId === workerNodeKey) { | |
43 | if (this.pool.workerNodes.length === 0) { | |
44 | this.nextWorkerNodeId = 0 | |
78ab2555 | 45 | } else { |
f06e48d8 JB |
46 | this.nextWorkerNodeId = |
47 | this.nextWorkerNodeId > this.pool.workerNodes.length - 1 | |
48 | ? this.pool.workerNodes.length - 1 | |
49 | : this.nextWorkerNodeId | |
78ab2555 | 50 | } |
97a2abc3 JB |
51 | } |
52 | return true | |
53 | } | |
bdaf31cd | 54 | } |