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dynamic.ts
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dynamic.ts
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import { type PoolOptions, type PoolType, PoolTypes } from '../pool'
import { FixedThreadPool, type ThreadWorkerWithMessageChannel } from './fixed'
/**
* A thread pool with a dynamic number of threads, but a guaranteed minimum number of threads.
*
* This thread pool creates new threads when the others are busy, up to the maximum number of threads.
* When the maximum number of threads is reached and workers are busy, an event is emitted. If you want to listen to this event, use the pool's `emitter`.
*
* @typeParam Data - Type of data sent to the worker. This can only be serializable data.
* @typeParam Response - Type of execution response. This can only be serializable data.
* @author [Alessandro Pio Ardizio](https://github.com/pioardi)
* @since 0.0.1
*/
export class DynamicThreadPool<
Data = unknown,
Response = unknown
> extends FixedThreadPool<Data, Response> {
/**
* Constructs a new poolifier dynamic thread pool.
*
* @param min - Minimum number of threads which are always active.
* @param max - Maximum number of threads that can be created by this pool.
* @param filePath - Path to an implementation of a `ThreadWorker` file, which can be relative or absolute.
* @param opts - Options for this dynamic thread pool.
*/
public constructor (
min: number,
protected readonly max: number,
filePath: string,
opts: PoolOptions<ThreadWorkerWithMessageChannel> = {}
) {
super(min, filePath, opts)
}
/** @inheritDoc */
protected get type (): PoolType {
return PoolTypes.dynamic
}
/** @inheritDoc */
protected get maxSize (): number {
return this.max
}
/** @inheritDoc */
protected get busy (): boolean {
return this.full && this.internalBusy()
}
}