X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fpools%2Fworker.ts;h=6b387a96088d430d455ed0a4dbb3759c1cbbe86e;hb=0717df3dc168fc35b8268713ac8b7bde86f024a9;hp=1de3cf09b6932053605efd6cc4719bfbe8bcf14c;hpb=a5d152043363ea21ec667205c88e0b9f2a6ff04e;p=poolifier.git

diff --git a/src/pools/worker.ts b/src/pools/worker.ts
index 1de3cf09..6b387a96 100644
--- a/src/pools/worker.ts
+++ b/src/pools/worker.ts
@@ -2,6 +2,11 @@ import type { MessageChannel } from 'node:worker_threads'
 import type { CircularArray } from '../circular-array'
 import type { Task } from '../utility-types'
 
+/**
+ * Callback invoked when the worker has started successfully.
+ */
+export type OnlineHandler<Worker extends IWorker> = (this: Worker) => void
+
 /**
  * Callback invoked if the worker has received a message.
  */
@@ -18,11 +23,6 @@ export type ErrorHandler<Worker extends IWorker> = (
   error: Error
 ) => void
 
-/**
- * Callback invoked when the worker has started successfully.
- */
-export type OnlineHandler<Worker extends IWorker> = (this: Worker) => void
-
 /**
  * Callback invoked when the worker exits successfully.
  */
@@ -141,10 +141,6 @@ export interface WorkerInfo {
    * Task function names.
    */
   taskFunctions?: string[]
-  /**
-   * Message channel.
-   */
-  messageChannel?: MessageChannel
 }
 
 /**
@@ -215,10 +211,25 @@ export interface IWorkerNode<Worker extends IWorker, Data = unknown> {
    * Worker info.
    */
   readonly info: WorkerInfo
+  /**
+   * Message channel (worker_threads only).
+   */
+  readonly messageChannel?: MessageChannel
   /**
    * Worker usage statistics.
    */
   usage: WorkerUsage
+  /**
+   * Tasks queue back pressure size.
+   * This is the number of tasks that can be enqueued before the worker node has back pressure.
+   */
+  tasksQueueBackPressureSize: number
+  /**
+   * Callback invoked when worker node tasks queue is back pressured.
+   *
+   * @param workerId - The worker id.
+   */
+  onBackPressure?: (workerId: number) => void
   /**
    * Tasks queue size.
    *
@@ -229,21 +240,40 @@ export interface IWorkerNode<Worker extends IWorker, Data = unknown> {
    * Enqueue task.
    *
    * @param task - The task to queue.
-   * @returns The task queue size.
+   * @returns The tasks queue size.
    */
   readonly enqueueTask: (task: Task<Data>) => number
+  /**
+   * Prepends a task to the tasks queue.
+   *
+   * @param task - The task to prepend.
+   * @returns The tasks queue size.
+   */
+  readonly unshiftTask: (task: Task<Data>) => number
   /**
    * Dequeue task.
    *
    * @returns The dequeued task.
    */
   readonly dequeueTask: () => Task<Data> | undefined
+  /**
+   * Pops a task from the tasks queue.
+   *
+   * @returns The popped task.
+   */
+  readonly popTask: () => Task<Data> | undefined
   /**
    * Clears tasks queue.
    */
   readonly clearTasksQueue: () => void
   /**
-   * Resets usage statistics .
+   * Whether the worker node has back pressure (i.e. its tasks queue is full).
+   *
+   * @returns `true` if the worker node has back pressure, `false` otherwise.
+   */
+  readonly hasBackPressure: () => boolean
+  /**
+   * Resets usage statistics.
    */
   readonly resetUsage: () => void
   /**
@@ -251,7 +281,10 @@ export interface IWorkerNode<Worker extends IWorker, Data = unknown> {
    */
   readonly closeChannel: () => void
   /**
-   * Gets task worker usage statistics.
+   * Gets task function worker usage statistics.
+   *
+   * @param name - The task function name.
+   * @returns The task function worker usage statistics if the task function worker usage statistics are initialized, `undefined` otherwise.
    */
-  readonly getTaskWorkerUsage: (name: string) => WorkerUsage | undefined
+  readonly getTaskFunctionWorkerUsage: (name: string) => WorkerUsage | undefined
 }