Merge dependabot/npm_and_yarn/examples/typescript/http-server-pool/fastify-cluster...

[poolifier.git] / src / pools / worker-node.ts

diff --git a/src/pools/worker-node.ts b/src/pools/worker-node.ts
index 545ee7e8598398d9b5ce11df7ac86a9edc75918f..9ecfd012f9b5402c4676004f24f7c04ecc4bf020 100644 (file)
--- a/src/pools/worker-node.ts
+++ b/src/pools/worker-node.ts
@@ -1,8 +1,13 @@
 import { MessageChannel } from 'node:worker_threads'
 import { CircularArray } from '../circular-array'
-import { Queue } from '../queue'
 import type { Task } from '../utility-types'
-import { DEFAULT_TASK_NAME } from '../utils'
+import {
+  DEFAULT_TASK_NAME,
+  EMPTY_FUNCTION,
+  exponentialDelay,
+  sleep
+} from '../utils'
+import { Deque } from '../deque'
 import {
   type IWorker,
   type IWorkerNode,
@@ -30,8 +35,13 @@ implements IWorkerNode<Worker, Data> {
   public usage: WorkerUsage
   /** @inheritdoc */
   public tasksQueueBackPressureSize: number
+  /** @inheritdoc */
+  public onBackPressure?: (workerId: number) => void
+  /** @inheritdoc */
+  public onEmptyQueue?: (workerId: number) => void
   private readonly taskFunctionsUsage: Map<string, WorkerUsage>
-  private readonly tasksQueue: Queue<Task<Data>>
+  private readonly tasksQueue: Deque<Task<Data>>
+  private onEmptyQueueCount: number
 
   /**
    * Constructs a new worker node.
@@ -70,8 +80,9 @@ implements IWorkerNode<Worker, Data> {
     }
     this.usage = this.initWorkerUsage()
     this.taskFunctionsUsage = new Map<string, WorkerUsage>()
-    this.tasksQueue = new Queue<Task<Data>>()
+    this.tasksQueue = new Deque<Task<Data>>()
     this.tasksQueueBackPressureSize = tasksQueueBackPressureSize
+    this.onEmptyQueueCount = 0
   }
 
   /** @inheritdoc */
@@ -79,23 +90,40 @@ implements IWorkerNode<Worker, Data> {
     return this.tasksQueue.size
   }
 
-  /**
-   * Tasks queue maximum size.
-   *
-   * @returns The tasks queue maximum size.
-   */
-  private tasksQueueMaxSize (): number {
-    return this.tasksQueue.maxSize
+  /** @inheritdoc */
+  public enqueueTask (task: Task<Data>): number {
+    const tasksQueueSize = this.tasksQueue.push(task)
+    if (this.onBackPressure != null && this.hasBackPressure()) {
+      this.onBackPressure(this.info.id as number)
+    }
+    return tasksQueueSize
   }
 
   /** @inheritdoc */
-  public enqueueTask (task: Task<Data>): number {
-    return this.tasksQueue.enqueue(task)
+  public unshiftTask (task: Task<Data>): number {
+    const tasksQueueSize = this.tasksQueue.unshift(task)
+    if (this.onBackPressure != null && this.hasBackPressure()) {
+      this.onBackPressure(this.info.id as number)
+    }
+    return tasksQueueSize
   }
 
   /** @inheritdoc */
   public dequeueTask (): Task<Data> | undefined {
-    return this.tasksQueue.dequeue()
+    const task = this.tasksQueue.shift()
+    if (this.onEmptyQueue != null && this.tasksQueue.size === 0) {
+      this.startOnEmptyQueue().catch(EMPTY_FUNCTION)
+    }
+    return task
+  }
+
+  /** @inheritdoc */
+  public popTask (): Task<Data> | undefined {
+    const task = this.tasksQueue.pop()
+    if (this.onEmptyQueue != null && this.tasksQueue.size === 0) {
+      this.startOnEmptyQueue().catch(EMPTY_FUNCTION)
+    }
+    return task
   }
 
   /** @inheritdoc */
@@ -149,6 +177,17 @@ implements IWorkerNode<Worker, Data> {
     return this.taskFunctionsUsage.get(name)
   }
 
+  private async startOnEmptyQueue (): Promise<void> {
+    if (this.tasksQueue.size > 0) {
+      this.onEmptyQueueCount = 0
+      return
+    }
+    (this.onEmptyQueue as (workerId: number) => void)(this.info.id as number)
+    ++this.onEmptyQueueCount
+    await sleep(exponentialDelay(this.onEmptyQueueCount))
+    await this.startOnEmptyQueue()
+  }
+
   private initWorkerInfo (worker: Worker, workerType: WorkerType): WorkerInfo {
     return {
       id: this.getWorkerId(worker, workerType),
@@ -160,10 +199,10 @@ implements IWorkerNode<Worker, Data> {
 
   private initWorkerUsage (): WorkerUsage {
     const getTasksQueueSize = (): number => {
-      return this.tasksQueueSize()
+      return this.tasksQueue.size
     }
     const getTasksQueueMaxSize = (): number => {
-      return this.tasksQueueMaxSize()
+      return this.tasksQueue.maxSize
     }
     return {
       tasks: {
@@ -175,6 +214,7 @@ implements IWorkerNode<Worker, Data> {
         get maxQueued (): number {
           return getTasksQueueMaxSize()
         },
+        stolen: 0,
         failed: 0
       },
       runTime: {
@@ -215,6 +255,7 @@ implements IWorkerNode<Worker, Data> {
         get queued (): number {
           return getTaskFunctionQueueSize()
         },
+        stolen: 0,
         failed: 0
       },
       runTime: {