X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fpools%2Fworker.ts;h=30239b11460b44728851a09e877f52ca5e184f7c;hb=e9ed6eeed0f1c96d89c1506ee342b3000a95b4ba;hp=37d6308507669dd1f0ebcc295b790a1857c16a3e;hpb=e4c07d066abc51e978a18f44a973a548f24fb7ad;p=poolifier.git

diff --git a/src/pools/worker.ts b/src/pools/worker.ts
index 37d63085..30239b11 100644
--- a/src/pools/worker.ts
+++ b/src/pools/worker.ts
@@ -1,14 +1,19 @@
-import type { MessageChannel } from 'node:worker_threads'
-import type { CircularArray } from '../circular-array'
-import type { Task } from '../utility-types'
+import type { MessageChannel, WorkerOptions } from 'node:worker_threads'
+import type { EventEmitter } from 'node:events'
+import type { CircularArray } from '../circular-array.js'
+import type { Task } from '../utility-types.js'
 
 /**
  * Callback invoked when the worker has started successfully.
+ *
+ * @typeParam Worker - Type of worker.
  */
 export type OnlineHandler<Worker extends IWorker> = (this: Worker) => void
 
 /**
  * Callback invoked if the worker has received a message.
+ *
+ * @typeParam Worker - Type of worker.
  */
 export type MessageHandler<Worker extends IWorker> = (
   this: Worker,
@@ -17,6 +22,8 @@ export type MessageHandler<Worker extends IWorker> = (
 
 /**
  * Callback invoked if the worker raised an error.
+ *
+ * @typeParam Worker - Type of worker.
  */
 export type ErrorHandler<Worker extends IWorker> = (
   this: Worker,
@@ -25,12 +32,25 @@ export type ErrorHandler<Worker extends IWorker> = (
 
 /**
  * Callback invoked when the worker exits successfully.
+ *
+ * @typeParam Worker - Type of worker.
  */
 export type ExitHandler<Worker extends IWorker> = (
   this: Worker,
   exitCode: number
 ) => void
 
+/**
+ * Worker event handler.
+ *
+ * @typeParam Worker - Type of worker.
+ */
+export type EventHandler<Worker extends IWorker> =
+  | OnlineHandler<Worker>
+  | MessageHandler<Worker>
+  | ErrorHandler<Worker>
+  | ExitHandler<Worker>
+
 /**
  * Measurement statistics.
  *
@@ -96,6 +116,10 @@ export interface TaskStatistics {
    * Maximum number of queued tasks.
    */
   readonly maxQueued?: number
+  /**
+   * Number of sequentially stolen tasks.
+   */
+  sequentiallyStolen: number
   /**
    * Number of stolen tasks.
    */
@@ -141,6 +165,11 @@ export interface WorkerInfo {
    * Ready flag.
    */
   ready: boolean
+  /**
+   * Stealing flag.
+   * This flag is set to `true` when worker node is stealing tasks from another worker node.
+   */
+  stealing: boolean
   /**
    * Task function names.
    */
@@ -185,36 +214,52 @@ export interface StrategyData {
  */
 export interface IWorker {
   /**
-   * Worker id.
+   * Cluster worker id.
    */
   readonly id?: number
+  /**
+   * Worker thread worker id.
+   */
   readonly threadId?: number
   /**
-   * Registers an event listener.
+   * Registers an event handler.
    *
    * @param event - The event.
    * @param handler - The event handler.
    */
-  readonly on: ((event: 'online', handler: OnlineHandler<this>) => void) &
-  ((event: 'message', handler: MessageHandler<this>) => void) &
-  ((event: 'error', handler: ErrorHandler<this>) => void) &
-  ((event: 'exit', handler: ExitHandler<this>) => void)
+  readonly on: (event: string, handler: EventHandler<this>) => void
   /**
-   * Registers a listener to the exit event that will only be performed once.
+   * Registers once an event handler.
    *
-   * @param event - The `'exit'` event.
-   * @param handler - The exit handler.
+   * @param event - The event.
+   * @param handler - The event handler.
+   */
+  readonly once: (event: string, handler: EventHandler<this>) => void
+  /**
+   * Stop all JavaScript execution in the worker thread as soon as possible.
+   * Returns a Promise for the exit code that is fulfilled when the `'exit' event` is emitted.
    */
-  readonly once: (event: 'exit', handler: ExitHandler<this>) => void
+  readonly terminate?: () => Promise<number>
+  /**
+   * Cluster worker disconnect.
+   */
+  readonly disconnect?: () => void
+  /**
+   * Cluster worker kill.
+   */
+  readonly kill?: (signal?: string) => void
 }
 
 /**
- * Worker node event callback.
+ * Worker node options.
  *
- * @param workerId - The worker id.
  * @internal
  */
-export type WorkerNodeEventCallback = (workerId: number) => void
+export interface WorkerNodeOptions {
+  workerOptions?: WorkerOptions
+  env?: Record<string, unknown>
+  tasksQueueBackPressureSize: number | undefined
+}
 
 /**
  * Worker node interface.
@@ -223,7 +268,8 @@ export type WorkerNodeEventCallback = (workerId: number) => void
  * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data.
  * @internal
  */
-export interface IWorkerNode<Worker extends IWorker, Data = unknown> {
+export interface IWorkerNode<Worker extends IWorker, Data = unknown>
+  extends EventEmitter {
   /**
    * Worker.
    */
@@ -238,11 +284,11 @@ export interface IWorkerNode<Worker extends IWorker, Data = unknown> {
   readonly usage: WorkerUsage
   /**
    * Worker choice strategy data.
-   * This is used to store data that is specific to the worker choice strategy.
+   * This is used to store data that are specific to the worker choice strategy.
    */
   strategyData?: StrategyData
   /**
-   * Message channel (worker_threads only).
+   * Message channel (worker thread only).
    */
   readonly messageChannel?: MessageChannel
   /**
@@ -250,14 +296,6 @@ export interface IWorkerNode<Worker extends IWorker, Data = unknown> {
    * 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.
-   */
-  onBackPressure?: WorkerNodeEventCallback
-  /**
-   * Callback invoked when worker node tasks queue is empty.
-   */
-  onEmptyQueue?: WorkerNodeEventCallback
   /**
    * Tasks queue size.
    *
@@ -305,9 +343,29 @@ export interface IWorkerNode<Worker extends IWorker, Data = unknown> {
    */
   readonly resetUsage: () => void
   /**
-   * Closes communication channel.
+   * Terminates the worker node.
+   */
+  readonly terminate: () => Promise<void>
+  /**
+   * Registers a worker event handler.
+   *
+   * @param event - The event.
+   * @param handler - The event handler.
+   */
+  readonly registerWorkerEventHandler: (
+    event: string,
+    handler: EventHandler<Worker>
+  ) => void
+  /**
+   * Registers once a worker event handler.
+   *
+   * @param event - The event.
+   * @param handler - The event handler.
    */
-  readonly closeChannel: () => void
+  readonly registerOnceWorkerEventHandler: (
+    event: string,
+    handler: EventHandler<Worker>
+  ) => void
   /**
    * Gets task function worker usage statistics.
    *
@@ -315,4 +373,21 @@ export interface IWorkerNode<Worker extends IWorker, Data = unknown> {
    * @returns The task function worker usage statistics if the task function worker usage statistics are initialized, `undefined` otherwise.
    */
   readonly getTaskFunctionWorkerUsage: (name: string) => WorkerUsage | undefined
+  /**
+   * Deletes task function worker usage statistics.
+   *
+   * @param name - The task function name.
+   * @returns `true` if the task function worker usage statistics were deleted, `false` otherwise.
+   */
+  readonly deleteTaskFunctionWorkerUsage: (name: string) => boolean
+}
+
+/**
+ * Worker node event detail.
+ *
+ * @internal
+ */
+export interface WorkerNodeEventDetail {
+  workerId?: number
+  workerNodeKey?: number
 }