Commit | Line | Data |
---|---|---|
2fc5cae3 JB |
1 | import { DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS } from '../../utils' |
2 | import type { IPool } from '../pool' | |
f06e48d8 | 3 | import type { IWorker } from '../worker' |
bdaf31cd | 4 | import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy' |
2fc5cae3 JB |
5 | import type { |
6 | IWorkerChoiceStrategy, | |
7 | WorkerChoiceStrategyOptions | |
8 | } from './selection-strategies-types' | |
bdaf31cd JB |
9 | |
10 | /** | |
e4543b14 | 11 | * Selects the least used worker. |
bdaf31cd | 12 | * |
38e795c1 JB |
13 | * @typeParam Worker - Type of worker which manages the strategy. |
14 | * @typeParam Data - Type of data sent to the worker. This can only be serializable data. | |
02706357 | 15 | * @typeParam Response - Type of execution response. This can only be serializable data. |
bdaf31cd | 16 | */ |
e4543b14 | 17 | export class LeastUsedWorkerChoiceStrategy< |
f06e48d8 | 18 | Worker extends IWorker, |
b2b1d84e JB |
19 | Data = unknown, |
20 | Response = unknown | |
bf90656c JB |
21 | > |
22 | extends AbstractWorkerChoiceStrategy<Worker, Data, Response> | |
17393ac8 | 23 | implements IWorkerChoiceStrategy { |
2fc5cae3 JB |
24 | /** @inheritDoc */ |
25 | public constructor ( | |
26 | pool: IPool<Worker, Data, Response>, | |
27 | opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS | |
28 | ) { | |
29 | super(pool, opts) | |
932fc8be | 30 | this.setTaskStatisticsRequirements(this.opts) |
2fc5cae3 JB |
31 | } |
32 | ||
afc003b2 | 33 | /** @inheritDoc */ |
a6f7f1b4 | 34 | public reset (): boolean { |
ea7a90d3 JB |
35 | return true |
36 | } | |
37 | ||
138d29a8 JB |
38 | /** @inheritDoc */ |
39 | public update (): boolean { | |
f4ff1ce2 | 40 | let minNumberOfTasks = Infinity |
08f3f44c | 41 | for (const [workerNodeKey, workerNode] of this.pool.workerNodes.entries()) { |
a4e07f72 JB |
42 | const workerTaskStatistics = workerNode.workerUsage.tasks |
43 | const workerTasks = | |
1c6fe997 JB |
44 | workerTaskStatistics.executed + |
45 | workerTaskStatistics.executing + | |
46 | workerTaskStatistics.queued | |
cf9c7b65 | 47 | if (workerTasks === 0) { |
d33be430 JB |
48 | this.nextWorkerNodeId = workerNodeKey |
49 | return true | |
f4ff1ce2 JB |
50 | } else if (workerTasks < minNumberOfTasks) { |
51 | minNumberOfTasks = workerTasks | |
d33be430 | 52 | this.nextWorkerNodeId = workerNodeKey |
bdaf31cd JB |
53 | } |
54 | } | |
d33be430 JB |
55 | return true |
56 | } | |
57 | ||
58 | /** @inheritDoc */ | |
59 | public choose (): number { | |
60 | return this.nextWorkerNodeId | |
bdaf31cd | 61 | } |
97a2abc3 | 62 | |
afc003b2 | 63 | /** @inheritDoc */ |
a4958de2 | 64 | public remove (): boolean { |
97a2abc3 JB |
65 | return true |
66 | } | |
bdaf31cd | 67 | } |