docs: enhance error message

[poolifier.git] / src / pools / pool.ts

diff --git a/src/pools/pool.ts b/src/pools/pool.ts
index 78e7c981b6d9e25efb0c3af38d5cab2c4a3f6014..2cdf9b748db6350b0bfa7c9e64aedd8b32b296cf 100644 (file)
--- a/src/pools/pool.ts
+++ b/src/pools/pool.ts
@@ -1,21 +1,50 @@
-import EventEmitter from 'events'
+import EventEmitter from 'node:events'
 import type {
   ErrorHandler,
   ExitHandler,
+  IWorker,
   MessageHandler,
   OnlineHandler
-} from './pool-worker'
-import type { WorkerChoiceStrategy } from './selection-strategies/selection-strategies-types'
+} from './worker'
+import type {
+  WorkerChoiceStrategy,
+  WorkerChoiceStrategyOptions
+} from './selection-strategies/selection-strategies-types'
 
 /**
  * Pool events emitter.
  */
 export class PoolEmitter extends EventEmitter {}
 
+/**
+ * Enumeration of pool events.
+ */
+export const PoolEvents = Object.freeze({
+  full: 'full',
+  busy: 'busy'
+} as const)
+
+/**
+ * Pool event.
+ */
+export type PoolEvent = keyof typeof PoolEvents
+
+/**
+ * Worker tasks queue options.
+ */
+export interface TasksQueueOptions {
+  /**
+   * Maximum number of tasks that can be executed concurrently on a worker.
+   *
+   * @defaultValue 1
+   */
+  concurrency?: number
+}
+
 /**
  * Options for a poolifier pool.
  */
-export interface PoolOptions<Worker> {
+export interface PoolOptions<Worker extends IWorker> {
   /**
    * A function that will listen for message event on each worker.
    */
@@ -36,19 +65,37 @@ export interface PoolOptions<Worker> {
    * The worker choice strategy to use in this pool.
    */
   workerChoiceStrategy?: WorkerChoiceStrategy
+  /**
+   * The worker choice strategy options.
+   */
+  workerChoiceStrategyOptions?: WorkerChoiceStrategyOptions
   /**
    * Pool events emission.
    *
-   * @default true
+   * @defaultValue true
    */
   enableEvents?: boolean
+  /**
+   * Pool worker tasks queue.
+   *
+   * @experimental
+   * @defaultValue false
+   */
+  enableTasksQueue?: boolean
+  /**
+   * Pool worker tasks queue options.
+   *
+   * @experimental
+   * @defaultValue \{ concurrency: 1 \}
+   */
+  tasksQueueOptions?: TasksQueueOptions
 }
 
 /**
  * Contract definition for a poolifier pool.
  *
- * @template Data Type of data sent to the worker. This can only be serializable data.
- * @template Response Type of response of execution. This can only be serializable data.
+ * @typeParam Data - Type of data sent to the worker. This can only be serializable data.
+ * @typeParam Response - Type of response of execution. This can only be serializable data.
  */
 export interface IPool<Data = unknown, Response = unknown> {
   /**
@@ -56,24 +103,25 @@ export interface IPool<Data = unknown, Response = unknown> {
    *
    * Events that can currently be listened to:
    *
-   * - `'busy'`
+   * - `'full'`: Emitted when the pool is dynamic and full.
+   * - `'busy'`: Emitted when the pool is busy.
    */
   readonly emitter?: PoolEmitter
   /**
    * Performs the task specified in the constructor with the data parameter.
    *
-   * @param data The input for the specified task. This can only be serializable data.
+   * @param data - The input for the specified task. This can only be serializable data.
    * @returns Promise that will be resolved when the task is successfully completed.
    */
-  execute(data: Data): Promise<Response>
+  execute: (data: Data) => Promise<Response>
   /**
    * Shutdowns every current worker in this pool.
    */
-  destroy(): Promise<void>
+  destroy: () => Promise<void>
   /**
    * Sets the worker choice strategy in this pool.
    *
-   * @param workerChoiceStrategy The worker choice strategy.
+   * @param workerChoiceStrategy - The worker choice strategy.
    */
-  setWorkerChoiceStrategy(workerChoiceStrategy: WorkerChoiceStrategy): void
+  setWorkerChoiceStrategy: (workerChoiceStrategy: WorkerChoiceStrategy) => void
 }