public readonly emitter?: PoolEmitter
/**
- * The task execution response promise map.
- *
+ * The task execution response promise map:
* - `key`: The message id of each submitted task.
* - `value`: An object that contains the worker, the execution response promise resolve and reject callbacks.
*
*/
protected readonly max?: number
- /**
- * Whether the pool is starting or not.
- */
- private readonly starting: boolean
/**
* Whether the pool is started or not.
*/
private started: boolean
+ /**
+ * Whether the pool is starting or not.
+ */
+ private starting: boolean
/**
* The start timestamp of the pool.
*/
this.setupHook()
- this.starting = true
- this.startPool()
+ this.started = false
this.starting = false
- this.started = true
+ if (this.opts.startWorkers === true) {
+ this.start()
+ }
this.startTimestamp = performance.now()
}
private checkPoolOptions (opts: PoolOptions<Worker>): void {
if (isPlainObject(opts)) {
+ this.opts.startWorkers = opts.startWorkers ?? true
+ this.checkValidWorkerChoiceStrategy(
+ opts.workerChoiceStrategy as WorkerChoiceStrategy
+ )
this.opts.workerChoiceStrategy =
opts.workerChoiceStrategy ?? WorkerChoiceStrategies.ROUND_ROBIN
- this.checkValidWorkerChoiceStrategy(this.opts.workerChoiceStrategy)
+ this.checkValidWorkerChoiceStrategyOptions(
+ opts.workerChoiceStrategyOptions as WorkerChoiceStrategyOptions
+ )
this.opts.workerChoiceStrategyOptions = {
...DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS,
...opts.workerChoiceStrategyOptions
}
- this.checkValidWorkerChoiceStrategyOptions(
- this.opts.workerChoiceStrategyOptions
- )
this.opts.restartWorkerOnError = opts.restartWorkerOnError ?? true
this.opts.enableEvents = opts.enableEvents ?? true
this.opts.enableTasksQueue = opts.enableTasksQueue ?? false
private checkValidWorkerChoiceStrategy (
workerChoiceStrategy: WorkerChoiceStrategy
): void {
- if (!Object.values(WorkerChoiceStrategies).includes(workerChoiceStrategy)) {
+ if (
+ workerChoiceStrategy != null &&
+ !Object.values(WorkerChoiceStrategies).includes(workerChoiceStrategy)
+ ) {
throw new Error(
`Invalid worker choice strategy '${workerChoiceStrategy}'`
)
private checkValidWorkerChoiceStrategyOptions (
workerChoiceStrategyOptions: WorkerChoiceStrategyOptions
): void {
- if (!isPlainObject(workerChoiceStrategyOptions)) {
+ if (
+ workerChoiceStrategyOptions != null &&
+ !isPlainObject(workerChoiceStrategyOptions)
+ ) {
throw new TypeError(
'Invalid worker choice strategy options: must be a plain object'
)
}
if (
- workerChoiceStrategyOptions.retries != null &&
+ workerChoiceStrategyOptions?.retries != null &&
!Number.isSafeInteger(workerChoiceStrategyOptions.retries)
) {
throw new TypeError(
)
}
if (
- workerChoiceStrategyOptions.retries != null &&
+ workerChoiceStrategyOptions?.retries != null &&
workerChoiceStrategyOptions.retries < 0
) {
throw new RangeError(
)
}
if (
- workerChoiceStrategyOptions.weights != null &&
+ workerChoiceStrategyOptions?.weights != null &&
Object.keys(workerChoiceStrategyOptions.weights).length !== this.maxSize
) {
throw new Error(
)
}
if (
- workerChoiceStrategyOptions.measurement != null &&
+ workerChoiceStrategyOptions?.measurement != null &&
!Object.values(Measurements).includes(
workerChoiceStrategyOptions.measurement
)
}
if (
tasksQueueOptions?.concurrency != null &&
- !Number.isSafeInteger(tasksQueueOptions?.concurrency)
+ !Number.isSafeInteger(tasksQueueOptions.concurrency)
) {
throw new TypeError(
'Invalid worker node tasks concurrency: must be an integer'
}
if (
tasksQueueOptions?.concurrency != null &&
- tasksQueueOptions?.concurrency <= 0
+ tasksQueueOptions.concurrency <= 0
) {
throw new RangeError(
- `Invalid worker node tasks concurrency: ${tasksQueueOptions?.concurrency} is a negative integer or zero`
- )
- }
- if (tasksQueueOptions?.queueMaxSize != null) {
- throw new Error(
- 'Invalid tasks queue options: queueMaxSize is deprecated, please use size instead'
+ `Invalid worker node tasks concurrency: ${tasksQueueOptions.concurrency} is a negative integer or zero`
)
}
if (
tasksQueueOptions?.size != null &&
- !Number.isSafeInteger(tasksQueueOptions?.size)
+ !Number.isSafeInteger(tasksQueueOptions.size)
) {
throw new TypeError(
'Invalid worker node tasks queue size: must be an integer'
)
}
- if (tasksQueueOptions?.size != null && tasksQueueOptions?.size <= 0) {
+ if (tasksQueueOptions?.size != null && tasksQueueOptions.size <= 0) {
throw new RangeError(
- `Invalid worker node tasks queue size: ${tasksQueueOptions?.size} is a negative integer or zero`
+ `Invalid worker node tasks queue size: ${tasksQueueOptions.size} is a negative integer or zero`
)
}
}
- private startPool (): void {
- while (
- this.workerNodes.reduce(
- (accumulator, workerNode) =>
- !workerNode.info.dynamic ? accumulator + 1 : accumulator,
- 0
- ) < this.numberOfWorkers
- ) {
- this.createAndSetupWorkerNode()
- }
- }
-
/** @inheritDoc */
public get info (): PoolInfo {
return {
version,
type: this.type,
worker: this.worker,
+ started: this.started,
ready: this.ready,
strategy: this.opts.workerChoiceStrategy as WorkerChoiceStrategy,
minSize: this.minSize,
minimum: round(
min(
...this.workerNodes.map(
- (workerNode) => workerNode.usage.runTime?.minimum ?? Infinity
+ workerNode => workerNode.usage.runTime?.minimum ?? Infinity
)
)
),
maximum: round(
max(
...this.workerNodes.map(
- (workerNode) => workerNode.usage.runTime?.maximum ?? -Infinity
+ workerNode => workerNode.usage.runTime?.maximum ?? -Infinity
)
)
),
minimum: round(
min(
...this.workerNodes.map(
- (workerNode) => workerNode.usage.waitTime?.minimum ?? Infinity
+ workerNode => workerNode.usage.waitTime?.minimum ?? Infinity
)
)
),
maximum: round(
max(
...this.workerNodes.map(
- (workerNode) => workerNode.usage.waitTime?.maximum ?? -Infinity
+ workerNode => workerNode.usage.waitTime?.maximum ?? -Infinity
)
)
),
*/
private getWorkerNodeKeyByWorker (worker: Worker): number {
return this.workerNodes.findIndex(
- (workerNode) => workerNode.worker === worker
+ workerNode => workerNode.worker === worker
)
}
*/
private getWorkerNodeKeyByWorkerId (workerId: number): number {
return this.workerNodes.findIndex(
- (workerNode) => workerNode.info.id === workerId
+ workerNode => workerNode.info.id === workerId
)
}
tasksQueueOptions?: TasksQueueOptions
): void {
if (this.opts.enableTasksQueue === true && !enable) {
+ this.unsetTaskStealing()
+ this.unsetTasksStealingOnBackPressure()
this.flushTasksQueues()
}
this.opts.enableTasksQueue = enable
this.opts.tasksQueueOptions =
this.buildTasksQueueOptions(tasksQueueOptions)
this.setTasksQueueSize(this.opts.tasksQueueOptions.size as number)
+ if (this.opts.tasksQueueOptions.taskStealing === true) {
+ this.setTaskStealing()
+ } else {
+ this.unsetTaskStealing()
+ }
+ if (this.opts.tasksQueueOptions.tasksStealingOnBackPressure === true) {
+ this.setTasksStealingOnBackPressure()
+ } else {
+ this.unsetTasksStealingOnBackPressure()
+ }
} else if (this.opts.tasksQueueOptions != null) {
delete this.opts.tasksQueueOptions
}
}
- private setTasksQueueSize (size: number): void {
- for (const workerNode of this.workerNodes) {
- workerNode.tasksQueueBackPressureSize = size
- }
- }
-
private buildTasksQueueOptions (
tasksQueueOptions: TasksQueueOptions
): TasksQueueOptions {
return {
...{
size: Math.pow(this.maxSize, 2),
- concurrency: 1
+ concurrency: 1,
+ taskStealing: true,
+ tasksStealingOnBackPressure: true
},
...tasksQueueOptions
}
}
+ private setTasksQueueSize (size: number): void {
+ for (const workerNode of this.workerNodes) {
+ workerNode.tasksQueueBackPressureSize = size
+ }
+ }
+
+ private setTaskStealing (): void {
+ for (const [workerNodeKey] of this.workerNodes.entries()) {
+ this.workerNodes[workerNodeKey].onEmptyQueue =
+ this.taskStealingOnEmptyQueue.bind(this)
+ }
+ }
+
+ private unsetTaskStealing (): void {
+ for (const [workerNodeKey] of this.workerNodes.entries()) {
+ delete this.workerNodes[workerNodeKey].onEmptyQueue
+ }
+ }
+
+ private setTasksStealingOnBackPressure (): void {
+ for (const [workerNodeKey] of this.workerNodes.entries()) {
+ this.workerNodes[workerNodeKey].onBackPressure =
+ this.tasksStealingOnBackPressure.bind(this)
+ }
+ }
+
+ private unsetTasksStealingOnBackPressure (): void {
+ for (const [workerNodeKey] of this.workerNodes.entries()) {
+ delete this.workerNodes[workerNodeKey].onBackPressure
+ }
+ }
+
/**
* Whether the pool is full or not.
*
if (this.opts.enableTasksQueue === true) {
return (
this.workerNodes.findIndex(
- (workerNode) =>
+ workerNode =>
workerNode.info.ready &&
workerNode.usage.tasks.executing <
(this.opts.tasksQueueOptions?.concurrency as number)
) === -1
)
- } else {
- return (
- this.workerNodes.findIndex(
- (workerNode) =>
- workerNode.info.ready && workerNode.usage.tasks.executing === 0
- ) === -1
- )
}
+ return (
+ this.workerNodes.findIndex(
+ workerNode =>
+ workerNode.info.ready && workerNode.usage.tasks.executing === 0
+ ) === -1
+ )
}
/** @inheritDoc */
): Promise<Response> {
return await new Promise<Response>((resolve, reject) => {
if (!this.started) {
- reject(new Error('Cannot execute a task on destroyed pool'))
+ reject(new Error('Cannot execute a task on not started pool'))
return
}
if (name != null && typeof name !== 'string') {
}
const timestamp = performance.now()
const workerNodeKey = this.chooseWorkerNode()
- const workerInfo = this.getWorkerInfo(workerNodeKey)
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: workerInfo.id as number,
+ workerId: this.getWorkerInfo(workerNodeKey).id as number,
taskId: randomUUID()
}
this.promiseResponseMap.set(task.taskId as string, {
})
}
+ /** @inheritdoc */
+ public start (): void {
+ this.starting = true
+ while (
+ this.workerNodes.reduce(
+ (accumulator, workerNode) =>
+ !workerNode.info.dynamic ? accumulator + 1 : accumulator,
+ 0
+ ) < this.numberOfWorkers
+ ) {
+ this.createAndSetupWorkerNode()
+ }
+ this.starting = false
+ this.started = true
+ }
+
/** @inheritDoc */
public async destroy (): Promise<void> {
await Promise.all(
workerId: number
): Promise<void> {
await new Promise<void>((resolve, reject) => {
- this.registerWorkerMessageListener(workerNodeKey, (message) => {
+ this.registerWorkerMessageListener(workerNodeKey, message => {
if (message.kill === 'success') {
resolve()
} else if (message.kill === 'failure') {
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) => {
+ worker.on('error', error => {
const workerNodeKey = this.getWorkerNodeKeyByWorker(worker)
const workerInfo = this.getWorkerInfo(workerNodeKey)
workerInfo.ready = false
this.workerNodes[workerNodeKey].closeChannel()
this.emitter?.emit(PoolEvents.error, error)
if (
- this.opts.restartWorkerOnError === true &&
+ this.started &&
!this.starting &&
- this.started
+ this.opts.restartWorkerOnError === true
) {
if (workerInfo.dynamic) {
this.createAndSetupDynamicWorkerNode()
this.createAndSetupWorkerNode()
}
}
- if (this.opts.enableTasksQueue === true) {
+ if (this.started && this.opts.enableTasksQueue === true) {
this.redistributeQueuedTasks(workerNodeKey)
}
})
*/
protected createAndSetupDynamicWorkerNode (): number {
const workerNodeKey = this.createAndSetupWorkerNode()
- this.registerWorkerMessageListener(workerNodeKey, (message) => {
+ this.registerWorkerMessageListener(workerNodeKey, message => {
const localWorkerNodeKey = this.getWorkerNodeKeyByWorkerId(
message.workerId
)
workerUsage.tasks.executing === 0 &&
this.tasksQueueSize(localWorkerNodeKey) === 0)))
) {
- this.destroyWorkerNode(localWorkerNodeKey).catch((error) => {
+ this.destroyWorkerNode(localWorkerNodeKey).catch(error => {
this.emitter?.emit(PoolEvents.error, error)
})
}
// 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)
+ if (this.opts.tasksQueueOptions?.taskStealing === true) {
+ this.workerNodes[workerNodeKey].onEmptyQueue =
+ this.taskStealingOnEmptyQueue.bind(this)
+ }
+ if (this.opts.tasksQueueOptions?.tasksStealingOnBackPressure === true) {
+ this.workerNodes[workerNodeKey].onBackPressure =
+ this.tasksStealingOnBackPressure.bind(this)
+ }
}
}
},
0
)
- if (destinationWorkerNodeKey != null) {
- const destinationWorkerNode = this.workerNodes[destinationWorkerNodeKey]
- const task = {
- ...(this.dequeueTask(workerNodeKey) as Task<Data>),
- workerId: destinationWorkerNode.info.id as number
- }
- if (this.shallExecuteTask(destinationWorkerNodeKey)) {
- this.executeTask(destinationWorkerNodeKey, task)
- } else {
- this.enqueueTask(destinationWorkerNodeKey, task)
- }
+ const destinationWorkerNode = this.workerNodes[destinationWorkerNodeKey]
+ const task = {
+ ...(this.dequeueTask(workerNodeKey) as Task<Data>),
+ workerId: destinationWorkerNode.info.id as number
+ }
+ if (this.shallExecuteTask(destinationWorkerNodeKey)) {
+ this.executeTask(destinationWorkerNodeKey, task)
+ } else {
+ this.enqueueTask(destinationWorkerNodeKey, task)
}
}
}
workerNodeB.usage.tasks.queued - workerNodeA.usage.tasks.queued
)
const sourceWorkerNode = workerNodes.find(
- (workerNode) =>
+ workerNode =>
workerNode.info.ready &&
workerNode.info.id !== workerId &&
workerNode.usage.tasks.queued > 0
* @returns The listener function to execute when a message is received from a worker.
*/
protected workerListener (): (message: MessageValue<Response>) => void {
- return (message) => {
+ return message => {
this.checkMessageWorkerId(message)
if (message.ready != null && message.taskFunctions != null) {
// Worker ready response received from worker
)
workerInfo.ready = message.ready as boolean
workerInfo.taskFunctions = message.taskFunctions
- if (this.emitter != null && this.ready) {
- this.emitter.emit(PoolEvents.ready, this.info)
+ if (this.ready) {
+ this.emitter?.emit(PoolEvents.ready, this.info)
}
}
return (
this.opts.enableTasksQueue === true &&
this.workerNodes.findIndex(
- (workerNode) => !workerNode.hasBackPressure()
+ workerNode => !workerNode.hasBackPressure()
) === -1
)
}
repositories / poolifier.git / blobdiff