X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fpools%2Fpool.ts;h=2cdf9b748db6350b0bfa7c9e64aedd8b32b296cf;hb=243a550a93e278669fe5602aeba92dc8ba11260e;hp=752045829214f76681f92d36fce414c581fd0c95;hpb=a35560bac09e829e1e19f88f8fd1d71a64c9d50b;p=poolifier.git

diff --git a/src/pools/pool.ts b/src/pools/pool.ts
index 75204582..2cdf9b74 100644
--- a/src/pools/pool.ts
+++ b/src/pools/pool.ts
@@ -1,27 +1,127 @@
-import type { WorkerChoiceStrategy } from './selection-strategies'
+import EventEmitter from 'node:events'
+import type {
+  ErrorHandler,
+  ExitHandler,
+  IWorker,
+  MessageHandler,
+  OnlineHandler
+} 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 extends IWorker> {
+  /**
+   * A function that will listen for message event on each worker.
+   */
+  messageHandler?: MessageHandler<Worker>
+  /**
+   * A function that will listen for error event on each worker.
+   */
+  errorHandler?: ErrorHandler<Worker>
+  /**
+   * A function that will listen for online event on each worker.
+   */
+  onlineHandler?: OnlineHandler<Worker>
+  /**
+   * A function that will listen for exit event on each worker.
+   */
+  exitHandler?: ExitHandler<Worker>
+  /**
+   * The worker choice strategy to use in this pool.
+   */
+  workerChoiceStrategy?: WorkerChoiceStrategy
+  /**
+   * The worker choice strategy options.
+   */
+  workerChoiceStrategyOptions?: WorkerChoiceStrategyOptions
+  /**
+   * Pool events emission.
+   *
+   * @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> {
   /**
-   * Perform the task specified in the constructor with the data parameter.
+   * Emitter on which events can be listened to.
+   *
+   * Events that can currently be listened to:
+   *
+   * - `'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>
   /**
-   * Shut down every current worker in this pool.
+   * Shutdowns every current worker in this pool.
    */
-  destroy(): Promise<void>
+  destroy: () => Promise<void>
   /**
-   * Set the worker choice strategy in this pool.
+   * 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
 }