-import EventEmitterAsyncResource from 'node:events'
+import { EventEmitter } from 'node:events'
import type {
ErrorHandler,
ExitHandler,
} from './selection-strategies/selection-strategies-types'
/**
- * Pool types.
- *
- * @enum
- * @internal
+ * Enumeration of pool types.
*/
-export enum PoolType {
+export const PoolTypes = Object.freeze({
/**
* Fixed pool type.
*/
- FIXED = 'fixed',
+ fixed: 'fixed',
/**
* Dynamic pool type.
*/
- DYNAMIC = 'dynamic'
-}
+ dynamic: 'dynamic'
+} as const)
+
+/**
+ * Pool type.
+ */
+export type PoolType = keyof typeof PoolTypes
+
+/**
+ * Enumeration of worker types.
+ */
+export const WorkerTypes = Object.freeze({
+ cluster: 'cluster',
+ thread: 'thread'
+} as const)
+
+/**
+ * Worker type.
+ */
+export type WorkerType = keyof typeof WorkerTypes
/**
* Pool events emitter.
*/
-export class PoolEmitter extends EventEmitterAsyncResource {}
+export class PoolEmitter extends EventEmitter {}
/**
* Enumeration of pool events.
*/
export type PoolEvent = keyof typeof PoolEvents
+/**
+ * Pool information.
+ */
+export interface PoolInfo {
+ version: string
+ type: PoolType
+ worker: WorkerType
+ minSize: number
+ maxSize: number
+ /** Pool utilization ratio. */
+ utilization?: number
+ /** Pool total worker nodes */
+ workerNodes: number
+ /** Pool idle worker nodes */
+ idleWorkerNodes: number
+ /** Pool busy worker nodes */
+ busyWorkerNodes: number
+ executedTasks: number
+ executingTasks: number
+ queuedTasks: number
+ maxQueuedTasks: number
+ failedTasks: number
+ runTime?: {
+ minimum: number
+ maximum: number
+ average: number
+ median?: number
+ }
+ waitTime?: {
+ minimum: number
+ maximum: number
+ average: number
+ median?: number
+ }
+}
+
/**
* Worker tasks queue options.
*/
*
* @defaultValue 1
*/
- concurrency?: number
+ readonly concurrency?: number
}
/**
* Contract definition for a poolifier pool.
*
* @typeParam Worker - Type of worker which manages this pool.
- * @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.
+ * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data.
+ * @typeParam Response - Type of execution response. This can only be structured-cloneable data.
*/
export interface IPool<
Worker extends IWorker,
Response = unknown
> {
/**
- * Pool type.
- *
- * If it is `'dynamic'`, it provides the `max` property.
- */
- readonly type: PoolType
- /**
- * Pool maximum size.
+ * Pool information.
*/
- readonly size: number
+ readonly info: PoolInfo
/**
* Pool worker nodes.
*/
/**
* Executes the specified function in the worker constructor with the task data input parameter.
*
- * @param data - The task input data for the specified worker function. This can only be serializable data.
+ * @param data - The task input data for the specified worker function. This can only be structured-cloneable data.
* @param name - The name of the worker function to execute. If not specified, the default worker function will be executed.
* @returns Promise that will be fulfilled when the task is completed.
*/
execute: (data?: Data, name?: string) => Promise<Response>
/**
- * Shutdowns every current worker in this pool.
+ * Terminates every current worker in this pool.
*/
destroy: () => Promise<void>
/**