X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;ds=sidebyside;f=src%2Fpools%2Fpool.ts;h=14b30812d14bd21e55c0af4aee77db5daf8bc7e4;hb=0567595a23237d7b0e4bc0ec70c8e313eb71bb10;hp=0c9b232f2bca650dc6f7aed065f15e6e0061a99d;hpb=c97c7edb14ea0699cd82bce5d0ffe50ae26af667;p=poolifier.git

diff --git a/src/pools/pool.ts b/src/pools/pool.ts
index 0c9b232f..14b30812 100644
--- a/src/pools/pool.ts
+++ b/src/pools/pool.ts
@@ -1,9 +1,193 @@
+import EventEmitterAsyncResource from 'node:events'
+import type {
+  ErrorHandler,
+  ExitHandler,
+  IWorker,
+  MessageHandler,
+  OnlineHandler,
+  WorkerNode
+} from './worker'
+import type {
+  WorkerChoiceStrategy,
+  WorkerChoiceStrategyOptions
+} from './selection-strategies/selection-strategies-types'
+
+/**
+ * Pool types.
+ *
+ * @enum
+ * @internal
+ */
+export enum PoolType {
+  /**
+   * Fixed pool type.
+   */
+  FIXED = 'fixed',
+  /**
+   * Dynamic pool type.
+   */
+  DYNAMIC = 'dynamic'
+}
+
+/**
+ * Pool events emitter.
+ */
+export class PoolEmitter extends EventEmitterAsyncResource {}
+
+/**
+ * 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.
+ *
+ * @typeParam Worker - Type of worker.
+ */
+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.
+   *
+   * @defaultValue WorkerChoiceStrategies.ROUND_ROBIN
+   */
+  workerChoiceStrategy?: WorkerChoiceStrategy
+  /**
+   * The worker choice strategy options.
+   */
+  workerChoiceStrategyOptions?: WorkerChoiceStrategyOptions
+  /**
+   * Pool events emission.
+   *
+   * @defaultValue true
+   */
+  enableEvents?: boolean
+  /**
+   * Pool worker tasks queue.
+   *
+   * @defaultValue false
+   */
+  enableTasksQueue?: boolean
+  /**
+   * Pool worker tasks queue options.
+   */
+  tasksQueueOptions?: TasksQueueOptions
+}
+
+/**
+ * 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.
+ */
 export interface IPool<
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  Data = any,
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  Response = any
+  Worker extends IWorker,
+  Data = unknown,
+  Response = unknown
 > {
-  destroy(): Promise<void>
-  execute(data: Data): Promise<Response>
+  /**
+   * Pool type.
+   *
+   * If it is `'dynamic'`, it provides the `max` property.
+   */
+  readonly type: PoolType
+  /**
+   * Pool maximum size.
+   */
+  readonly size: number
+  /**
+   * Pool worker nodes.
+   */
+  readonly workerNodes: Array<WorkerNode<Worker, Data>>
+  /**
+   * 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
+  /**
+   * 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 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.
+   */
+  destroy: () => Promise<void>
+  /**
+   * Sets the worker choice strategy in this pool.
+   *
+   * @param workerChoiceStrategy - The worker choice strategy.
+   * @param workerChoiceStrategyOptions - The worker choice strategy options.
+   */
+  setWorkerChoiceStrategy: (
+    workerChoiceStrategy: WorkerChoiceStrategy,
+    workerChoiceStrategyOptions?: WorkerChoiceStrategyOptions
+  ) => void
+  /**
+   * Sets the worker choice strategy options in this pool.
+   *
+   * @param workerChoiceStrategyOptions - The worker choice strategy options.
+   */
+  setWorkerChoiceStrategyOptions: (
+    workerChoiceStrategyOptions: WorkerChoiceStrategyOptions
+  ) => void
+  /**
+   * Enables/disables the worker tasks queue in this pool.
+   *
+   * @param enable - Whether to enable or disable the worker tasks queue.
+   * @param tasksQueueOptions - The worker tasks queue options.
+   */
+  enableTasksQueue: (
+    enable: boolean,
+    tasksQueueOptions?: TasksQueueOptions
+  ) => void
+  /**
+   * Sets the worker tasks queue options in this pool.
+   *
+   * @param tasksQueueOptions - The worker tasks queue options.
+   */
+  setTasksQueueOptions: (tasksQueueOptions: TasksQueueOptions) => void
 }