build: bump volta pnpm version
[poolifier.git] / src / pools / cluster / dynamic.ts
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d35e5717 1import { PoolEvents, type PoolType, PoolTypes } from '../pool.js'
ded253e2 2import { checkDynamicPoolSize } from '../utils.js'
d35e5717 3import { type ClusterPoolOptions, FixedClusterPool } from './fixed.js'
f045358d 4
4ade5f1f 5/**
729c563d 6 * A cluster pool with a dynamic number of workers, but a guaranteed minimum number of workers.
4ade5f1f 7 *
729c563d 8 * This cluster pool creates new workers when the others are busy, up to the maximum number of workers.
9cd39dd4 9 * When the maximum number of workers is reached and workers are busy, an event is emitted. If you want to listen to this event, use the pool's `emitter`.
729c563d 10 *
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11 * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data.
12 * @typeParam Response - Type of execution response. This can only be structured-cloneable data.
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13 * @author [Christopher Quadflieg](https://github.com/Shinigami92)
14 * @since 2.0.0
4ade5f1f 15 */
325f50bc 16export class DynamicClusterPool<
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17 Data = unknown,
18 Response = unknown
325f50bc 19> extends FixedClusterPool<Data, Response> {
4ade5f1f 20 /**
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21 * Constructs a new poolifier dynamic cluster pool.
22 *
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23 * @param min - Minimum number of workers which are always active.
24 * @param max - Maximum number of workers that can be created by this pool.
25 * @param filePath - Path to an implementation of a `ClusterWorker` file, which can be relative or absolute.
26 * @param opts - Options for this dynamic cluster pool.
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27 */
28 public constructor (
c97c7edb 29 min: number,
26ce26ca 30 max: number,
31b90205 31 filePath: string,
2889bd70 32 opts: ClusterPoolOptions = {}
4ade5f1f 33 ) {
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34 super(min, filePath, opts, max)
35 checkDynamicPoolSize(
36 this.minimumNumberOfWorkers,
c63a35a0 37 this.maximumNumberOfWorkers
26ce26ca 38 )
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39 }
40
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41 /** @inheritDoc */
42 protected shallCreateDynamicWorker (): boolean {
8e8d9101 43 return (!this.full && this.internalBusy()) || this.empty
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44 }
45
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46 /** @inheritDoc */
47 protected checkAndEmitDynamicWorkerCreationEvents (): void {
48 if (this.full) {
49 this.emitter?.emit(PoolEvents.full, this.info)
50 }
51 }
52
afc003b2 53 /** @inheritDoc */
8881ae32 54 protected get type (): PoolType {
6b27d407 55 return PoolTypes.dynamic
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56 }
57
afc003b2 58 /** @inheritDoc */
c319c66b 59 protected get busy (): boolean {
0527b6db 60 return this.full && this.internalBusy()
c2ade475 61 }
4ade5f1f 62}