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d35e5717 JB |
1 | import type { IPool } from '../pool.js' |
2 | import type { IWorker } from '../worker.js' | |
3 | import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy.js' | |
2fc5cae3 JB |
4 | import type { |
5 | IWorkerChoiceStrategy, | |
3a502712 | 6 | WorkerChoiceStrategyOptions, |
d35e5717 | 7 | } from './selection-strategies-types.js' |
bdaf31cd JB |
8 | |
9 | /** | |
e4543b14 | 10 | * Selects the least used worker. |
38e795c1 | 11 | * @typeParam Worker - Type of worker which manages the strategy. |
e102732c JB |
12 | * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data. |
13 | * @typeParam Response - Type of execution response. This can only be structured-cloneable data. | |
bdaf31cd | 14 | */ |
e4543b14 | 15 | export class LeastUsedWorkerChoiceStrategy< |
f06e48d8 | 16 | Worker extends IWorker, |
b2b1d84e JB |
17 | Data = unknown, |
18 | Response = unknown | |
bf90656c JB |
19 | > |
20 | extends AbstractWorkerChoiceStrategy<Worker, Data, Response> | |
17393ac8 | 21 | implements IWorkerChoiceStrategy { |
2fc5cae3 JB |
22 | /** @inheritDoc */ |
23 | public constructor ( | |
24 | pool: IPool<Worker, Data, Response>, | |
39618ede | 25 | opts?: WorkerChoiceStrategyOptions |
2fc5cae3 JB |
26 | ) { |
27 | super(pool, opts) | |
2fc5cae3 JB |
28 | } |
29 | ||
afc003b2 | 30 | /** @inheritDoc */ |
a6f7f1b4 | 31 | public reset (): boolean { |
ea7a90d3 JB |
32 | return true |
33 | } | |
34 | ||
138d29a8 JB |
35 | /** @inheritDoc */ |
36 | public update (): boolean { | |
db703c75 JB |
37 | return true |
38 | } | |
39 | ||
40 | /** @inheritDoc */ | |
b1aae695 | 41 | public choose (): number | undefined { |
baca80f7 | 42 | this.setPreviousWorkerNodeKey(this.nextWorkerNodeKey) |
fce028d6 | 43 | this.nextWorkerNodeKey = this.leastUsedNextWorkerNodeKey() |
b1aae695 | 44 | return this.nextWorkerNodeKey |
9b106837 JB |
45 | } |
46 | ||
47 | /** @inheritDoc */ | |
48 | public remove (): boolean { | |
49 | return true | |
50 | } | |
51 | ||
b1aae695 | 52 | private leastUsedNextWorkerNodeKey (): number | undefined { |
f3a91bac JB |
53 | return this.pool.workerNodes.reduce( |
54 | (minWorkerNodeKey, workerNode, workerNodeKey, workerNodes) => { | |
ae3ab61d | 55 | return this.isWorkerNodeReady(workerNodeKey) && |
e0843544 JB |
56 | workerNode.usage.tasks.executing + workerNode.usage.tasks.queued < |
57 | workerNodes[minWorkerNodeKey].usage.tasks.executing + | |
ae3ab61d | 58 | workerNodes[minWorkerNodeKey].usage.tasks.queued |
f3a91bac JB |
59 | ? workerNodeKey |
60 | : minWorkerNodeKey | |
61 | }, | |
62 | 0 | |
63 | ) | |
97a2abc3 | 64 | } |
bdaf31cd | 65 | } |