import type {
MessageValue,
PromiseResponseWrapper,
- Task
+ Task,
+ Writable
} from '../utility-types'
import {
DEFAULT_TASK_NAME,
Response
>
+ /**
+ * Dynamic pool maximum size property placeholder.
+ */
+ protected readonly max?: number
+
/**
* Whether the pool is starting or not.
*/
private readonly starting: boolean
/**
- * The start timestamp of the pool.
+ * Whether the pool is started or not.
*/
- private readonly startTimestamp
+ private started: boolean
/**
- * The task function names.
+ * The start timestamp of the pool.
*/
- private taskFunctions!: string[]
+ private readonly startTimestamp
/**
* Constructs a new poolifier pool.
this.chooseWorkerNode = this.chooseWorkerNode.bind(this)
this.executeTask = this.executeTask.bind(this)
this.enqueueTask = this.enqueueTask.bind(this)
- this.dequeueTask = this.dequeueTask.bind(this)
- this.checkAndEmitEvents = this.checkAndEmitEvents.bind(this)
if (this.opts.enableEvents === true) {
this.emitter = new PoolEmitter()
this.starting = true
this.startPool()
this.starting = false
+ this.started = true
this.startTimestamp = performance.now()
}
protected checkDynamicPoolSize (min: number, max: number): void {
if (this.type === PoolTypes.dynamic) {
if (max == null) {
- throw new Error(
+ throw new TypeError(
'Cannot instantiate a dynamic pool without specifying the maximum pool size'
)
} else if (!Number.isSafeInteger(max)) {
this.opts.workerChoiceStrategy =
opts.workerChoiceStrategy ?? WorkerChoiceStrategies.ROUND_ROBIN
this.checkValidWorkerChoiceStrategy(this.opts.workerChoiceStrategy)
- this.opts.workerChoiceStrategyOptions =
- opts.workerChoiceStrategyOptions ??
- DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+ this.opts.workerChoiceStrategyOptions = {
+ ...DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS,
+ ...opts.workerChoiceStrategyOptions
+ }
this.checkValidWorkerChoiceStrategyOptions(
this.opts.workerChoiceStrategyOptions
)
'Invalid worker choice strategy options: must be a plain object'
)
}
+ if (
+ workerChoiceStrategyOptions.choiceRetries != null &&
+ !Number.isSafeInteger(workerChoiceStrategyOptions.choiceRetries)
+ ) {
+ throw new TypeError(
+ 'Invalid worker choice strategy options: choice retries must be an integer'
+ )
+ }
+ if (
+ workerChoiceStrategyOptions.choiceRetries != null &&
+ workerChoiceStrategyOptions.choiceRetries <= 0
+ ) {
+ throw new RangeError(
+ `Invalid worker choice strategy options: choice retries '${workerChoiceStrategyOptions.choiceRetries}' must be greater than zero`
+ )
+ }
if (
workerChoiceStrategyOptions.weights != null &&
Object.keys(workerChoiceStrategyOptions.weights).length !== this.maxSize
}
private checkValidTasksQueueOptions (
- tasksQueueOptions: TasksQueueOptions
+ tasksQueueOptions: Writable<TasksQueueOptions>
): void {
if (tasksQueueOptions != null && !isPlainObject(tasksQueueOptions)) {
throw new TypeError('Invalid tasks queue options: must be a plain object')
!Number.isSafeInteger(tasksQueueOptions.concurrency)
) {
throw new TypeError(
- 'Invalid worker tasks concurrency: must be an integer'
+ 'Invalid worker node tasks concurrency: must be an integer'
)
}
if (
tasksQueueOptions?.concurrency != null &&
tasksQueueOptions.concurrency <= 0
+ ) {
+ throw new RangeError(
+ `Invalid worker node tasks concurrency: ${tasksQueueOptions.concurrency} is a negative integer or zero`
+ )
+ }
+ if (
+ tasksQueueOptions?.queueMaxSize != null &&
+ tasksQueueOptions?.size != null
) {
throw new Error(
- `Invalid worker tasks concurrency '${tasksQueueOptions.concurrency}'`
+ 'Invalid tasks queue options: cannot specify both queueMaxSize and size'
+ )
+ }
+ if (tasksQueueOptions?.queueMaxSize != null) {
+ tasksQueueOptions.size = tasksQueueOptions.queueMaxSize
+ }
+ if (
+ tasksQueueOptions?.size != null &&
+ !Number.isSafeInteger(tasksQueueOptions.size)
+ ) {
+ throw new TypeError(
+ 'Invalid worker node tasks queue max size: must be an integer'
+ )
+ }
+ if (tasksQueueOptions?.size != null && tasksQueueOptions.size <= 0) {
+ throw new RangeError(
+ `Invalid worker node tasks queue max size: ${tasksQueueOptions.size} is a negative integer or zero`
)
}
}
0
)
}),
+ ...(this.opts.enableTasksQueue === true && {
+ backPressure: this.hasBackPressure()
+ }),
failedTasks: this.workerNodes.reduce(
(accumulator, workerNode) =>
accumulator + workerNode.usage.tasks.failed,
/**
* The pool minimum size.
*/
- protected abstract get minSize (): number
+ protected get minSize (): number {
+ return this.numberOfWorkers
+ }
/**
* The pool maximum size.
*/
- protected abstract get maxSize (): number
+ protected get maxSize (): number {
+ return this.max ?? this.numberOfWorkers
+ }
/**
* Checks if the worker id sent in the received message from a worker is valid.
* @throws {@link https://nodejs.org/api/errors.html#class-error} If the worker id is invalid.
*/
private checkMessageWorkerId (message: MessageValue<Response>): void {
- if (
+ if (message.workerId == null) {
+ throw new Error('Worker message received without worker id')
+ } else if (
message.workerId != null &&
this.getWorkerNodeKeyByWorkerId(message.workerId) === -1
) {
workerChoiceStrategyOptions: WorkerChoiceStrategyOptions
): void {
this.checkValidWorkerChoiceStrategyOptions(workerChoiceStrategyOptions)
- this.opts.workerChoiceStrategyOptions = workerChoiceStrategyOptions
+ this.opts.workerChoiceStrategyOptions = {
+ ...DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS,
+ ...workerChoiceStrategyOptions
+ }
this.workerChoiceStrategyContext.setOptions(
this.opts.workerChoiceStrategyOptions
)
this.checkValidTasksQueueOptions(tasksQueueOptions)
this.opts.tasksQueueOptions =
this.buildTasksQueueOptions(tasksQueueOptions)
+ this.setTasksQueueMaxSize(this.opts.tasksQueueOptions.size as number)
} else if (this.opts.tasksQueueOptions != null) {
delete this.opts.tasksQueueOptions
}
}
+ private setTasksQueueMaxSize (size: number): void {
+ for (const workerNode of this.workerNodes) {
+ workerNode.tasksQueueBackPressureSize = size
+ }
+ }
+
private buildTasksQueueOptions (
tasksQueueOptions: TasksQueueOptions
): TasksQueueOptions {
return {
- concurrency: tasksQueueOptions?.concurrency ?? 1
+ ...{
+ size: Math.pow(this.maxSize, 2),
+ concurrency: 1
+ },
+ ...tasksQueueOptions
}
}
/** @inheritDoc */
public listTaskFunctions (): string[] {
- if (this.taskFunctions != null) {
- return this.taskFunctions
- } else {
- return []
+ for (const workerNode of this.workerNodes) {
+ if (
+ Array.isArray(workerNode.info.taskFunctions) &&
+ workerNode.info.taskFunctions.length > 0
+ ) {
+ return workerNode.info.taskFunctions
+ }
}
+ return []
}
/** @inheritDoc */
transferList?: TransferListItem[]
): Promise<Response> {
return await new Promise<Response>((resolve, reject) => {
+ if (!this.started) {
+ reject(new Error('Cannot execute a task on destroyed pool'))
+ }
if (name != null && typeof name !== 'string') {
reject(new TypeError('name argument must be a string'))
}
typeof name === 'string' &&
name.trim().length === 0
) {
- reject(new Error('name argument must not be an empty string'))
- }
- if (name != null && !this.taskFunctions.includes(name)) {
- reject(
- new Error(`Task function '${name}' is not registered in the pool`)
- )
+ reject(new TypeError('name argument must not be an empty string'))
}
if (transferList != null && !Array.isArray(transferList)) {
reject(new TypeError('transferList argument must be an array'))
}
const timestamp = performance.now()
const workerNodeKey = this.chooseWorkerNode()
+ const workerInfo = this.getWorkerInfo(workerNodeKey) as WorkerInfo
+ if (
+ name != null &&
+ Array.isArray(workerInfo.taskFunctions) &&
+ !workerInfo.taskFunctions.includes(name)
+ ) {
+ reject(
+ new Error(`Task function '${name}' is not registered in the pool`)
+ )
+ }
const task: Task<Data> = {
name: name ?? DEFAULT_TASK_NAME,
// eslint-disable-next-line @typescript-eslint/consistent-type-assertions
data: data ?? ({} as Data),
transferList,
timestamp,
- workerId: this.getWorkerInfo(workerNodeKey).id as number,
+ workerId: workerInfo.id as number,
taskId: randomUUID()
}
this.promiseResponseMap.set(task.taskId as string, {
} else {
this.enqueueTask(workerNodeKey, task)
}
- this.checkAndEmitEvents()
})
}
await this.destroyWorkerNode(workerNodeKey)
})
)
+ this.emitter?.emit(PoolEvents.destroy, this.info)
+ this.started = false
}
protected async sendKillMessageToWorker (
workerNodeKey: number,
task: Task<Data>
): void {
- const workerUsage = this.workerNodes[workerNodeKey].usage
- ++workerUsage.tasks.executing
- this.updateWaitTimeWorkerUsage(workerUsage, task)
- const taskWorkerUsage = this.workerNodes[workerNodeKey].getTaskWorkerUsage(
- task.name as string
- ) as WorkerUsage
- ++taskWorkerUsage.tasks.executing
- this.updateWaitTimeWorkerUsage(taskWorkerUsage, task)
+ if (this.workerNodes[workerNodeKey]?.usage != null) {
+ const workerUsage = this.workerNodes[workerNodeKey].usage
+ ++workerUsage.tasks.executing
+ this.updateWaitTimeWorkerUsage(workerUsage, task)
+ }
+ if (
+ this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) &&
+ this.workerNodes[workerNodeKey].getTaskFunctionWorkerUsage(
+ task.name as string
+ ) != null
+ ) {
+ const taskFunctionWorkerUsage = this.workerNodes[
+ workerNodeKey
+ ].getTaskFunctionWorkerUsage(task.name as string) as WorkerUsage
+ ++taskFunctionWorkerUsage.tasks.executing
+ this.updateWaitTimeWorkerUsage(taskFunctionWorkerUsage, task)
+ }
}
/**
workerNodeKey: number,
message: MessageValue<Response>
): void {
- const workerUsage = this.workerNodes[workerNodeKey].usage
- this.updateTaskStatisticsWorkerUsage(workerUsage, message)
- this.updateRunTimeWorkerUsage(workerUsage, message)
- this.updateEluWorkerUsage(workerUsage, message)
- const taskWorkerUsage = this.workerNodes[workerNodeKey].getTaskWorkerUsage(
- message.taskPerformance?.name ?? DEFAULT_TASK_NAME
- ) as WorkerUsage
- this.updateTaskStatisticsWorkerUsage(taskWorkerUsage, message)
- this.updateRunTimeWorkerUsage(taskWorkerUsage, message)
- this.updateEluWorkerUsage(taskWorkerUsage, message)
+ if (this.workerNodes[workerNodeKey]?.usage != null) {
+ const workerUsage = this.workerNodes[workerNodeKey].usage
+ this.updateTaskStatisticsWorkerUsage(workerUsage, message)
+ this.updateRunTimeWorkerUsage(workerUsage, message)
+ this.updateEluWorkerUsage(workerUsage, message)
+ }
+ if (
+ this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) &&
+ this.workerNodes[workerNodeKey].getTaskFunctionWorkerUsage(
+ message.taskPerformance?.name as string
+ ) != null
+ ) {
+ const taskFunctionWorkerUsage = this.workerNodes[
+ workerNodeKey
+ ].getTaskFunctionWorkerUsage(
+ message.taskPerformance?.name as string
+ ) as WorkerUsage
+ this.updateTaskStatisticsWorkerUsage(taskFunctionWorkerUsage, message)
+ this.updateRunTimeWorkerUsage(taskFunctionWorkerUsage, message)
+ this.updateEluWorkerUsage(taskFunctionWorkerUsage, message)
+ }
+ }
+
+ /**
+ * Whether the worker node shall update its task function worker usage or not.
+ *
+ * @param workerNodeKey - The worker node key.
+ * @returns `true` if the worker node shall update its task function worker usage, `false` otherwise.
+ */
+ private shallUpdateTaskFunctionWorkerUsage (workerNodeKey: number): boolean {
+ const workerInfo = this.getWorkerInfo(workerNodeKey)
+ return (
+ workerInfo != null &&
+ Array.isArray(workerInfo.taskFunctions) &&
+ workerInfo.taskFunctions.length > 2
+ )
}
private updateTaskStatisticsWorkerUsage (
message: MessageValue<Response>
): void {
const workerTaskStatistics = workerUsage.tasks
- --workerTaskStatistics.executing
+ if (
+ workerTaskStatistics.executing != null &&
+ workerTaskStatistics.executing > 0
+ ) {
+ --workerTaskStatistics.executing
+ }
if (message.taskError == null) {
++workerTaskStatistics.executed
} else {
if (this.shallCreateDynamicWorker()) {
const workerNodeKey = this.createAndSetupDynamicWorkerNode()
if (
- this.workerChoiceStrategyContext.getStrategyPolicy().useDynamicWorker
+ this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerUsage
) {
return workerNodeKey
}
protected createAndSetupWorkerNode (): number {
const worker = this.createWorker()
+ worker.on('online', this.opts.onlineHandler ?? EMPTY_FUNCTION)
worker.on('message', this.opts.messageHandler ?? EMPTY_FUNCTION)
worker.on('error', this.opts.errorHandler ?? EMPTY_FUNCTION)
worker.on('error', (error) => {
const workerNodeKey = this.getWorkerNodeKeyByWorker(worker)
- const workerInfo = this.getWorkerInfo(workerNodeKey)
+ const workerInfo = this.getWorkerInfo(workerNodeKey) as WorkerInfo
workerInfo.ready = false
this.workerNodes[workerNodeKey].closeChannel()
this.emitter?.emit(PoolEvents.error, error)
- if (this.opts.restartWorkerOnError === true && !this.starting) {
+ if (
+ this.opts.restartWorkerOnError === true &&
+ !this.starting &&
+ this.started
+ ) {
if (workerInfo.dynamic) {
this.createAndSetupDynamicWorkerNode()
} else {
this.redistributeQueuedTasks(workerNodeKey)
}
})
- worker.on('online', this.opts.onlineHandler ?? EMPTY_FUNCTION)
worker.on('exit', this.opts.exitHandler ?? EMPTY_FUNCTION)
worker.once('exit', () => {
this.removeWorkerNode(worker)
})
}
})
- const workerInfo = this.getWorkerInfo(workerNodeKey)
+ const workerInfo = this.getWorkerInfo(workerNodeKey) as WorkerInfo
this.sendToWorker(workerNodeKey, {
checkActive: true,
workerId: workerInfo.id as number
})
workerInfo.dynamic = true
- if (this.workerChoiceStrategyContext.getStrategyPolicy().useDynamicWorker) {
+ if (
+ this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerReady ||
+ this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerUsage
+ ) {
workerInfo.ready = true
}
+ this.checkAndEmitDynamicWorkerCreationEvents()
return workerNodeKey
}
this.sendStartupMessageToWorker(workerNodeKey)
// Send the statistics message to worker.
this.sendStatisticsMessageToWorker(workerNodeKey)
+ if (this.opts.enableTasksQueue === true) {
+ this.workerNodes[workerNodeKey].onEmptyQueue =
+ this.taskStealingOnEmptyQueue.bind(this)
+ this.workerNodes[workerNodeKey].onBackPressure =
+ this.tasksStealingOnBackPressure.bind(this)
+ }
}
/**
elu: this.workerChoiceStrategyContext.getTaskStatisticsRequirements()
.elu.aggregate
},
- workerId: this.getWorkerInfo(workerNodeKey).id as number
+ workerId: (this.getWorkerInfo(workerNodeKey) as WorkerInfo).id as number
})
}
private redistributeQueuedTasks (workerNodeKey: number): void {
while (this.tasksQueueSize(workerNodeKey) > 0) {
- let targetWorkerNodeKey: number = workerNodeKey
+ let destinationWorkerNodeKey: number = workerNodeKey
let minQueuedTasks = Infinity
let executeTask = false
for (const [workerNodeId, workerNode] of this.workerNodes.entries()) {
- const workerInfo = this.getWorkerInfo(workerNodeId)
if (
+ workerNode.info.ready &&
+ workerNodeId !== workerNodeKey &&
+ workerNode.usage.tasks.executing <
+ (this.opts.tasksQueueOptions?.concurrency as number)
+ ) {
+ executeTask = true
+ }
+ if (
+ workerNode.info.ready &&
workerNodeId !== workerNodeKey &&
- workerInfo.ready &&
workerNode.usage.tasks.queued === 0
) {
- if (
- this.workerNodes[workerNodeId].usage.tasks.executing <
- (this.opts.tasksQueueOptions?.concurrency as number)
- ) {
- executeTask = true
- }
- targetWorkerNodeKey = workerNodeId
+ destinationWorkerNodeKey = workerNodeId
break
}
if (
+ workerNode.info.ready &&
workerNodeId !== workerNodeKey &&
- workerInfo.ready &&
workerNode.usage.tasks.queued < minQueuedTasks
) {
minQueuedTasks = workerNode.usage.tasks.queued
- targetWorkerNodeKey = workerNodeId
+ destinationWorkerNodeKey = workerNodeId
}
}
+ const task = {
+ ...(this.dequeueTask(workerNodeKey) as Task<Data>),
+ workerId: (this.getWorkerInfo(destinationWorkerNodeKey) as WorkerInfo)
+ .id as number
+ }
if (executeTask) {
- this.executeTask(
- targetWorkerNodeKey,
- this.dequeueTask(workerNodeKey) as Task<Data>
- )
+ this.executeTask(destinationWorkerNodeKey, task)
} else {
- this.enqueueTask(
- targetWorkerNodeKey,
- this.dequeueTask(workerNodeKey) as Task<Data>
- )
+ this.enqueueTask(destinationWorkerNodeKey, task)
+ }
+ }
+ }
+
+ private taskStealingOnEmptyQueue (workerId: number): void {
+ const destinationWorkerNodeKey = this.getWorkerNodeKeyByWorkerId(workerId)
+ const destinationWorkerNode = this.workerNodes[destinationWorkerNodeKey]
+ const workerNodes = this.workerNodes
+ .slice()
+ .sort(
+ (workerNodeA, workerNodeB) =>
+ workerNodeB.usage.tasks.queued - workerNodeA.usage.tasks.queued
+ )
+ for (const sourceWorkerNode of workerNodes) {
+ if (
+ sourceWorkerNode.info.ready &&
+ sourceWorkerNode.info.id !== workerId &&
+ sourceWorkerNode.usage.tasks.queued > 0
+ ) {
+ const task = {
+ ...(sourceWorkerNode.popTask() as Task<Data>),
+ workerId: destinationWorkerNode.info.id as number
+ }
+ if (
+ destinationWorkerNode.usage.tasks.executing <
+ (this.opts.tasksQueueOptions?.concurrency as number)
+ ) {
+ this.executeTask(destinationWorkerNodeKey, task)
+ } else {
+ this.enqueueTask(destinationWorkerNodeKey, task)
+ }
+ break
+ }
+ }
+ }
+
+ private tasksStealingOnBackPressure (workerId: number): void {
+ const sourceWorkerNode =
+ this.workerNodes[this.getWorkerNodeKeyByWorkerId(workerId)]
+ const workerNodes = this.workerNodes
+ .slice()
+ .sort(
+ (workerNodeA, workerNodeB) =>
+ workerNodeA.usage.tasks.queued - workerNodeB.usage.tasks.queued
+ )
+ for (const [workerNodeKey, workerNode] of workerNodes.entries()) {
+ if (
+ workerNode.info.ready &&
+ workerNode.info.id !== workerId &&
+ sourceWorkerNode.usage.tasks.queued > 0 &&
+ !workerNode.hasBackPressure()
+ ) {
+ const task = {
+ ...(sourceWorkerNode.popTask() as Task<Data>),
+ workerId: workerNode.info.id as number
+ }
+ if (
+ workerNode.usage.tasks.executing <
+ (this.opts.tasksQueueOptions?.concurrency as number)
+ ) {
+ this.executeTask(workerNodeKey, task)
+ } else {
+ this.enqueueTask(workerNodeKey, task)
+ }
}
}
}
protected workerListener (): (message: MessageValue<Response>) => void {
return (message) => {
this.checkMessageWorkerId(message)
- if (message.ready != null) {
+ if (message.ready != null && message.taskFunctions != null) {
// Worker ready response received from worker
this.handleWorkerReadyResponse(message)
} else if (message.taskId != null) {
this.handleTaskExecutionResponse(message)
} else if (message.taskFunctions != null) {
// Task functions message received from worker
- this.taskFunctions = message.taskFunctions
+ (
+ this.getWorkerInfo(
+ this.getWorkerNodeKeyByWorkerId(message.workerId)
+ ) as WorkerInfo
+ ).taskFunctions = message.taskFunctions
}
}
}
private handleWorkerReadyResponse (message: MessageValue<Response>): void {
- this.getWorkerInfo(
+ if (message.ready === false) {
+ throw new Error(`Worker ${message.workerId} failed to initialize`)
+ }
+ const workerInfo = this.getWorkerInfo(
this.getWorkerNodeKeyByWorkerId(message.workerId)
- ).ready = message.ready as boolean
+ ) as WorkerInfo
+ workerInfo.ready = message.ready as boolean
+ workerInfo.taskFunctions = message.taskFunctions
if (this.emitter != null && this.ready) {
this.emitter.emit(PoolEvents.ready, this.info)
}
}
private handleTaskExecutionResponse (message: MessageValue<Response>): void {
- const promiseResponse = this.promiseResponseMap.get(
- message.taskId as string
- )
+ const { taskId, taskError, data } = message
+ const promiseResponse = this.promiseResponseMap.get(taskId as string)
if (promiseResponse != null) {
- if (message.taskError != null) {
- this.emitter?.emit(PoolEvents.taskError, message.taskError)
- promiseResponse.reject(message.taskError.message)
+ if (taskError != null) {
+ this.emitter?.emit(PoolEvents.taskError, taskError)
+ promiseResponse.reject(taskError.message)
} else {
- promiseResponse.resolve(message.data as Response)
+ promiseResponse.resolve(data as Response)
}
const workerNodeKey = promiseResponse.workerNodeKey
this.afterTaskExecutionHook(workerNodeKey, message)
- this.promiseResponseMap.delete(message.taskId as string)
+ this.promiseResponseMap.delete(taskId as string)
if (
this.opts.enableTasksQueue === true &&
this.tasksQueueSize(workerNodeKey) > 0 &&
}
}
- private checkAndEmitEvents (): void {
- if (this.emitter != null) {
- if (this.busy) {
- this.emitter.emit(PoolEvents.busy, this.info)
- }
- if (this.type === PoolTypes.dynamic && this.full) {
- this.emitter.emit(PoolEvents.full, this.info)
+ private checkAndEmitTaskExecutionEvents (): void {
+ if (this.busy) {
+ this.emitter?.emit(PoolEvents.busy, this.info)
+ }
+ }
+
+ private checkAndEmitTaskQueuingEvents (): void {
+ if (this.hasBackPressure()) {
+ this.emitter?.emit(PoolEvents.backPressure, this.info)
+ }
+ }
+
+ private checkAndEmitDynamicWorkerCreationEvents (): void {
+ if (this.type === PoolTypes.dynamic) {
+ if (this.full) {
+ this.emitter?.emit(PoolEvents.full, this.info)
}
}
}
* @param workerNodeKey - The worker node key.
* @returns The worker information.
*/
- protected getWorkerInfo (workerNodeKey: number): WorkerInfo {
- return this.workerNodes[workerNodeKey].info
+ protected getWorkerInfo (workerNodeKey: number): WorkerInfo | undefined {
+ return this.workerNodes[workerNodeKey]?.info
}
/**
* @throws {@link https://nodejs.org/api/errors.html#class-error} If the added worker node is not found.
*/
private addWorkerNode (worker: Worker): number {
- const workerNode = new WorkerNode<Worker, Data>(worker, this.worker)
+ const workerNode = new WorkerNode<Worker, Data>(
+ worker,
+ this.worker,
+ this.opts.tasksQueueOptions?.size ?? Math.pow(this.maxSize, 2)
+ )
// Flag the worker node as ready at pool startup.
if (this.starting) {
workerNode.info.ready = true
this.workerNodes.push(workerNode)
const workerNodeKey = this.getWorkerNodeKeyByWorker(worker)
if (workerNodeKey === -1) {
- throw new Error('Worker node not found')
+ throw new Error('Worker node added not found')
}
return workerNodeKey
}
}
}
+ /** @inheritDoc */
+ public hasWorkerNodeBackPressure (workerNodeKey: number): boolean {
+ return (
+ this.opts.enableTasksQueue === true &&
+ this.workerNodes[workerNodeKey].hasBackPressure()
+ )
+ }
+
+ private hasBackPressure (): boolean {
+ return (
+ this.opts.enableTasksQueue === true &&
+ this.workerNodes.findIndex(
+ (workerNode) => !workerNode.hasBackPressure()
+ ) === -1
+ )
+ }
+
/**
* Executes the given task on the worker given its worker node key.
*
private executeTask (workerNodeKey: number, task: Task<Data>): void {
this.beforeTaskExecutionHook(workerNodeKey, task)
this.sendToWorker(workerNodeKey, task, task.transferList)
+ this.checkAndEmitTaskExecutionEvents()
}
private enqueueTask (workerNodeKey: number, task: Task<Data>): number {
- return this.workerNodes[workerNodeKey].enqueueTask(task)
+ const tasksQueueSize = this.workerNodes[workerNodeKey].enqueueTask(task)
+ this.checkAndEmitTaskQueuingEvents()
+ return tasksQueueSize
}
private dequeueTask (workerNodeKey: number): Task<Data> | undefined {