Commit | Line | Data |
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2fc5cae3 | 1 | import type { IPool } from '../pool' |
f06e48d8 | 2 | import type { IWorker } from '../worker' |
bdaf31cd | 3 | import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy' |
2fc5cae3 JB |
4 | import type { |
5 | IWorkerChoiceStrategy, | |
26ce26ca | 6 | InternalWorkerChoiceStrategyOptions |
2fc5cae3 | 7 | } from './selection-strategies-types' |
bdaf31cd JB |
8 | |
9 | /** | |
e4543b14 | 10 | * Selects the least used worker. |
bdaf31cd | 11 | * |
38e795c1 | 12 | * @typeParam Worker - Type of worker which manages the strategy. |
e102732c JB |
13 | * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data. |
14 | * @typeParam Response - Type of execution response. This can only be structured-cloneable data. | |
bdaf31cd | 15 | */ |
e4543b14 | 16 | export class LeastUsedWorkerChoiceStrategy< |
f06e48d8 | 17 | Worker extends IWorker, |
b2b1d84e JB |
18 | Data = unknown, |
19 | Response = unknown | |
bf90656c JB |
20 | > |
21 | extends AbstractWorkerChoiceStrategy<Worker, Data, Response> | |
17393ac8 | 22 | implements IWorkerChoiceStrategy { |
2fc5cae3 JB |
23 | /** @inheritDoc */ |
24 | public constructor ( | |
25 | pool: IPool<Worker, Data, Response>, | |
26ce26ca | 26 | opts: InternalWorkerChoiceStrategyOptions |
2fc5cae3 JB |
27 | ) { |
28 | super(pool, opts) | |
2fc5cae3 JB |
29 | } |
30 | ||
afc003b2 | 31 | /** @inheritDoc */ |
a6f7f1b4 | 32 | public reset (): boolean { |
ea7a90d3 JB |
33 | return true |
34 | } | |
35 | ||
138d29a8 JB |
36 | /** @inheritDoc */ |
37 | public update (): boolean { | |
db703c75 JB |
38 | return true |
39 | } | |
40 | ||
41 | /** @inheritDoc */ | |
b1aae695 | 42 | public choose (): number | undefined { |
baca80f7 | 43 | this.setPreviousWorkerNodeKey(this.nextWorkerNodeKey) |
fce028d6 | 44 | this.nextWorkerNodeKey = this.leastUsedNextWorkerNodeKey() |
b1aae695 | 45 | return this.nextWorkerNodeKey |
9b106837 JB |
46 | } |
47 | ||
48 | /** @inheritDoc */ | |
49 | public remove (): boolean { | |
50 | return true | |
51 | } | |
52 | ||
b1aae695 | 53 | private leastUsedNextWorkerNodeKey (): number | undefined { |
f3a91bac JB |
54 | return this.pool.workerNodes.reduce( |
55 | (minWorkerNodeKey, workerNode, workerNodeKey, workerNodes) => { | |
ae3ab61d JB |
56 | return this.isWorkerNodeReady(workerNodeKey) && |
57 | workerNode.usage.tasks.executed + | |
58 | workerNode.usage.tasks.executing + | |
59 | workerNode.usage.tasks.queued < | |
60 | workerNodes[minWorkerNodeKey].usage.tasks.executed + | |
61 | workerNodes[minWorkerNodeKey].usage.tasks.executing + | |
62 | workerNodes[minWorkerNodeKey].usage.tasks.queued | |
f3a91bac JB |
63 | ? workerNodeKey |
64 | : minWorkerNodeKey | |
65 | }, | |
66 | 0 | |
67 | ) | |
97a2abc3 | 68 | } |
bdaf31cd | 69 | } |