import { MessageChannel } from 'node:worker_threads'
import { CircularArray } from '../circular-array.js'
-import { Deque } from '../deque.js'
+import { PriorityQueue } from '../priority-queue.js'
import type { Task } from '../utility-types.js'
import { DEFAULT_TASK_NAME } from '../utils.js'
import {
public messageChannel?: MessageChannel
/** @inheritdoc */
public tasksQueueBackPressureSize: number
- private readonly tasksQueue: Deque<Task<Data>>
- private onBackPressureStarted: boolean
+ private readonly tasksQueue: PriorityQueue<Task<Data>>
+ private setBackPressureFlag: boolean
private readonly taskFunctionsUsage: Map<string, WorkerUsage>
/**
}
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
this.tasksQueueBackPressureSize = opts.tasksQueueBackPressureSize!
- this.tasksQueue = new Deque<Task<Data>>()
- this.onBackPressureStarted = false
+ this.tasksQueue = new PriorityQueue<Task<Data>>(opts.tasksQueueBucketSize)
+ this.setBackPressureFlag = false
this.taskFunctionsUsage = new Map<string, WorkerUsage>()
}
/** @inheritdoc */
public enqueueTask (task: Task<Data>): number {
- const tasksQueueSize = this.tasksQueue.push(task)
- if (this.hasBackPressure() && !this.onBackPressureStarted) {
- this.onBackPressureStarted = true
+ const tasksQueueSize = this.tasksQueue.enqueue(task, task.priority)
+ if (
+ !this.setBackPressureFlag &&
+ this.hasBackPressure() &&
+ !this.info.backPressure
+ ) {
+ this.setBackPressureFlag = true
+ this.info.backPressure = true
this.emit('backPressure', { workerId: this.info.id })
- this.onBackPressureStarted = false
+ this.setBackPressureFlag = false
}
return tasksQueueSize
}
/** @inheritdoc */
- public unshiftTask (task: Task<Data>): number {
- const tasksQueueSize = this.tasksQueue.unshift(task)
- if (this.hasBackPressure() && !this.onBackPressureStarted) {
- this.onBackPressureStarted = true
- this.emit('backPressure', { workerId: this.info.id })
- this.onBackPressureStarted = false
+ public dequeueTask (bucket?: number): Task<Data> | undefined {
+ const task = this.tasksQueue.dequeue(bucket)
+ if (
+ !this.setBackPressureFlag &&
+ !this.hasBackPressure() &&
+ this.info.backPressure
+ ) {
+ this.setBackPressureFlag = true
+ this.info.backPressure = false
+ this.setBackPressureFlag = false
}
- return tasksQueueSize
- }
-
- /** @inheritdoc */
- public dequeueTask (): Task<Data> | undefined {
- return this.tasksQueue.shift()
+ return task
}
/** @inheritdoc */
- public popTask (): Task<Data> | undefined {
- return this.tasksQueue.pop()
+ public dequeueLastPrioritizedTask (): Task<Data> | undefined {
+ // Start from the last empty or partially filled bucket
+ return this.dequeueTask(this.tasksQueue.buckets + 1)
}
/** @inheritdoc */
type: getWorkerType(worker)!,
dynamic: false,
ready: false,
- stealing: false
+ stealing: false,
+ backPressure: false
}
}