+import { AsyncResource } from 'node:async_hooks'
import { randomUUID } from 'node:crypto'
+import { EventEmitterAsyncResource } from 'node:events'
import { performance } from 'node:perf_hooks'
import type { TransferListItem } from 'node:worker_threads'
-import { EventEmitterAsyncResource } from 'node:events'
-import { AsyncResource } from 'node:async_hooks'
+
import type {
MessageValue,
PromiseResponseWrapper,
Task
-} from '../utility-types'
+} from '../utility-types.js'
import {
+ average,
DEFAULT_TASK_NAME,
- DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS,
EMPTY_FUNCTION,
- average,
exponentialDelay,
isKillBehavior,
isPlainObject,
min,
round,
sleep
-} from '../utils'
-import { KillBehaviors } from '../worker/worker-options'
-import type { TaskFunction } from '../worker/task-functions'
+} from '../utils.js'
+import type { TaskFunction } from '../worker/task-functions.js'
+import { KillBehaviors } from '../worker/worker-options.js'
import {
type IPool,
PoolEvents,
type PoolType,
PoolTypes,
type TasksQueueOptions
-} from './pool'
-import type {
- IWorker,
- IWorkerNode,
- TaskStatistics,
- WorkerInfo,
- WorkerNodeEventDetail,
- WorkerType,
- WorkerUsage
-} from './worker'
+} from './pool.js'
import {
- type MeasurementStatisticsRequirements,
Measurements,
WorkerChoiceStrategies,
type WorkerChoiceStrategy,
type WorkerChoiceStrategyOptions
-} from './selection-strategies/selection-strategies-types'
-import { WorkerChoiceStrategyContext } from './selection-strategies/worker-choice-strategy-context'
-import { version } from './version'
-import { WorkerNode } from './worker-node'
+} from './selection-strategies/selection-strategies-types.js'
+import { WorkerChoiceStrategyContext } from './selection-strategies/worker-choice-strategy-context.js'
import {
checkFilePath,
checkValidTasksQueueOptions,
checkValidWorkerChoiceStrategy,
- updateMeasurementStatistics
-} from './utils'
+ getDefaultTasksQueueOptions,
+ updateEluWorkerUsage,
+ updateRunTimeWorkerUsage,
+ updateTaskStatisticsWorkerUsage,
+ updateWaitTimeWorkerUsage,
+ waitWorkerNodeEvents
+} from './utils.js'
+import { version } from './version.js'
+import type {
+ IWorker,
+ IWorkerNode,
+ WorkerInfo,
+ WorkerNodeEventDetail,
+ WorkerType
+} from './worker.js'
+import { WorkerNode } from './worker-node.js'
/**
* Base class that implements some shared logic for all poolifier pools.
/** @inheritDoc */
public emitter?: EventEmitterAsyncResource
- /**
- * Dynamic pool maximum size property placeholder.
- */
- protected readonly max?: number
-
/**
* The task execution response promise map:
* - `key`: The message id of each submitted task.
/**
* Worker choice strategy context referencing a worker choice algorithm implementation.
*/
- protected workerChoiceStrategyContext: WorkerChoiceStrategyContext<
+ protected workerChoiceStrategyContext?: WorkerChoiceStrategyContext<
Worker,
Data,
Response
/**
* Constructs a new poolifier pool.
*
- * @param numberOfWorkers - Number of workers that this pool should manage.
+ * @param minimumNumberOfWorkers - Minimum number of workers that this pool manages.
* @param filePath - Path to the worker file.
* @param opts - Options for the pool.
+ * @param maximumNumberOfWorkers - Maximum number of workers that this pool manages.
*/
public constructor (
- protected readonly numberOfWorkers: number,
+ protected readonly minimumNumberOfWorkers: number,
protected readonly filePath: string,
- protected readonly opts: PoolOptions<Worker>
+ protected readonly opts: PoolOptions<Worker>,
+ protected readonly maximumNumberOfWorkers?: number
) {
if (!this.isMain()) {
throw new Error(
'Cannot start a pool from a worker with the same type as the pool'
)
}
+ this.checkPoolType()
checkFilePath(this.filePath)
- this.checkNumberOfWorkers(this.numberOfWorkers)
+ this.checkMinimumNumberOfWorkers(this.minimumNumberOfWorkers)
this.checkPoolOptions(this.opts)
this.chooseWorkerNode = this.chooseWorkerNode.bind(this)
this.startTimestamp = performance.now()
}
- private checkNumberOfWorkers (numberOfWorkers: number): void {
- if (numberOfWorkers == null) {
+ private checkPoolType (): void {
+ if (this.type === PoolTypes.fixed && this.maximumNumberOfWorkers != null) {
+ throw new Error(
+ 'Cannot instantiate a fixed pool with a maximum number of workers specified at initialization'
+ )
+ }
+ }
+
+ private checkMinimumNumberOfWorkers (
+ minimumNumberOfWorkers: number | undefined
+ ): void {
+ if (minimumNumberOfWorkers == null) {
throw new Error(
'Cannot instantiate a pool without specifying the number of workers'
)
- } else if (!Number.isSafeInteger(numberOfWorkers)) {
+ } else if (!Number.isSafeInteger(minimumNumberOfWorkers)) {
throw new TypeError(
'Cannot instantiate a pool with a non safe integer number of workers'
)
- } else if (numberOfWorkers < 0) {
+ } else if (minimumNumberOfWorkers < 0) {
throw new RangeError(
'Cannot instantiate a pool with a negative number of workers'
)
- } else if (this.type === PoolTypes.fixed && numberOfWorkers === 0) {
+ } else if (this.type === PoolTypes.fixed && minimumNumberOfWorkers === 0) {
throw new RangeError('Cannot instantiate a fixed pool with zero worker')
}
}
private checkPoolOptions (opts: PoolOptions<Worker>): void {
if (isPlainObject(opts)) {
this.opts.startWorkers = opts.startWorkers ?? true
- checkValidWorkerChoiceStrategy(
- opts.workerChoiceStrategy as WorkerChoiceStrategy
- )
+ checkValidWorkerChoiceStrategy(opts.workerChoiceStrategy)
this.opts.workerChoiceStrategy =
opts.workerChoiceStrategy ?? WorkerChoiceStrategies.ROUND_ROBIN
this.checkValidWorkerChoiceStrategyOptions(
- opts.workerChoiceStrategyOptions as WorkerChoiceStrategyOptions
+ opts.workerChoiceStrategyOptions
)
- this.opts.workerChoiceStrategyOptions = {
- ...DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS,
- ...opts.workerChoiceStrategyOptions
+ if (opts.workerChoiceStrategyOptions != null) {
+ this.opts.workerChoiceStrategyOptions = opts.workerChoiceStrategyOptions
}
this.opts.restartWorkerOnError = opts.restartWorkerOnError ?? true
this.opts.enableEvents = opts.enableEvents ?? true
this.opts.enableTasksQueue = opts.enableTasksQueue ?? false
if (this.opts.enableTasksQueue) {
- checkValidTasksQueueOptions(opts.tasksQueueOptions as TasksQueueOptions)
+ checkValidTasksQueueOptions(opts.tasksQueueOptions)
this.opts.tasksQueueOptions = this.buildTasksQueueOptions(
- opts.tasksQueueOptions as TasksQueueOptions
+ opts.tasksQueueOptions
)
}
} else {
}
private checkValidWorkerChoiceStrategyOptions (
- workerChoiceStrategyOptions: WorkerChoiceStrategyOptions
+ workerChoiceStrategyOptions: WorkerChoiceStrategyOptions | undefined
): void {
if (
workerChoiceStrategyOptions != null &&
'Invalid worker choice strategy options: must be a plain object'
)
}
- if (
- workerChoiceStrategyOptions?.retries != null &&
- !Number.isSafeInteger(workerChoiceStrategyOptions.retries)
- ) {
- throw new TypeError(
- 'Invalid worker choice strategy options: retries must be an integer'
- )
- }
- if (
- workerChoiceStrategyOptions?.retries != null &&
- workerChoiceStrategyOptions.retries < 0
- ) {
- throw new RangeError(
- `Invalid worker choice strategy options: retries '${workerChoiceStrategyOptions.retries}' must be greater or equal than zero`
- )
- }
if (
workerChoiceStrategyOptions?.weights != null &&
- Object.keys(workerChoiceStrategyOptions.weights).length !== this.maxSize
+ Object.keys(workerChoiceStrategyOptions.weights).length !==
+ (this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers)
) {
throw new Error(
'Invalid worker choice strategy options: must have a weight for each worker node'
worker: this.worker,
started: this.started,
ready: this.ready,
- strategy: this.opts.workerChoiceStrategy as WorkerChoiceStrategy,
- minSize: this.minSize,
- maxSize: this.maxSize,
- ...(this.workerChoiceStrategyContext.getTaskStatisticsRequirements()
- .runTime.aggregate &&
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ strategy: this.opts.workerChoiceStrategy!,
+ strategyRetries: this.workerChoiceStrategyContext?.retriesCount ?? 0,
+ minSize: this.minimumNumberOfWorkers,
+ maxSize: this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers,
+ ...(this.workerChoiceStrategyContext?.getTaskStatisticsRequirements()
+ .runTime.aggregate === true &&
this.workerChoiceStrategyContext.getTaskStatisticsRequirements()
- .waitTime.aggregate && { utilization: round(this.utilization) }),
+ .waitTime.aggregate && {
+ utilization: round(this.utilization)
+ }),
workerNodes: this.workerNodes.length,
idleWorkerNodes: this.workerNodes.reduce(
(accumulator, workerNode) =>
: accumulator,
0
),
+ ...(this.opts.enableTasksQueue === true && {
+ stealingWorkerNodes: this.workerNodes.reduce(
+ (accumulator, workerNode) =>
+ workerNode.info.stealing ? accumulator + 1 : accumulator,
+ 0
+ )
+ }),
busyWorkerNodes: this.workerNodes.reduce(
(accumulator, _workerNode, workerNodeKey) =>
this.isWorkerNodeBusy(workerNodeKey) ? accumulator + 1 : accumulator,
...(this.opts.enableTasksQueue === true && {
maxQueuedTasks: this.workerNodes.reduce(
(accumulator, workerNode) =>
- accumulator + (workerNode.usage.tasks?.maxQueued ?? 0),
+ accumulator + (workerNode.usage.tasks.maxQueued ?? 0),
0
)
}),
accumulator + workerNode.usage.tasks.failed,
0
),
- ...(this.workerChoiceStrategyContext.getTaskStatisticsRequirements()
- .runTime.aggregate && {
+ ...(this.workerChoiceStrategyContext?.getTaskStatisticsRequirements()
+ .runTime.aggregate === true && {
runTime: {
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
)
)
),
})
}
}),
- ...(this.workerChoiceStrategyContext.getTaskStatisticsRequirements()
- .waitTime.aggregate && {
+ ...(this.workerChoiceStrategyContext?.getTaskStatisticsRequirements()
+ .waitTime.aggregate === true && {
waitTime: {
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
)
)
),
* The pool readiness boolean status.
*/
private get ready (): boolean {
+ if (this.empty) {
+ return false
+ }
return (
this.workerNodes.reduce(
(accumulator, workerNode) =>
? accumulator + 1
: accumulator,
0
- ) >= this.minSize
+ ) >= this.minimumNumberOfWorkers
)
}
+ /**
+ * The pool emptiness boolean status.
+ */
+ protected get empty (): boolean {
+ return this.minimumNumberOfWorkers === 0 && this.workerNodes.length === 0
+ }
+
/**
* The approximate pool utilization.
*
*/
private get utilization (): number {
const poolTimeCapacity =
- (performance.now() - this.startTimestamp) * this.maxSize
+ (performance.now() - this.startTimestamp) *
+ (this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers)
const totalTasksRunTime = this.workerNodes.reduce(
(accumulator, workerNode) =>
- accumulator + (workerNode.usage.runTime?.aggregate ?? 0),
+ accumulator + (workerNode.usage.runTime.aggregate ?? 0),
0
)
const totalTasksWaitTime = this.workerNodes.reduce(
(accumulator, workerNode) =>
- accumulator + (workerNode.usage.waitTime?.aggregate ?? 0),
+ accumulator + (workerNode.usage.waitTime.aggregate ?? 0),
0
)
return (totalTasksRunTime + totalTasksWaitTime) / poolTimeCapacity
*/
protected abstract get worker (): WorkerType
- /**
- * The pool minimum size.
- */
- protected get minSize (): number {
- return this.numberOfWorkers
- }
-
- /**
- * The pool maximum size.
- */
- protected get maxSize (): number {
- return this.max ?? this.numberOfWorkers
- }
-
/**
* Checks if the worker id sent in the received message from a worker is valid.
*
}
}
- /**
- * Gets the given worker its worker node key.
- *
- * @param worker - The worker.
- * @returns The worker node key if found in the pool worker nodes, `-1` otherwise.
- */
- private getWorkerNodeKeyByWorker (worker: Worker): number {
- return this.workerNodes.findIndex(
- workerNode => workerNode.worker === worker
- )
- }
-
/**
* Gets the worker node key given its worker id.
*
): void {
checkValidWorkerChoiceStrategy(workerChoiceStrategy)
this.opts.workerChoiceStrategy = workerChoiceStrategy
- this.workerChoiceStrategyContext.setWorkerChoiceStrategy(
+ this.workerChoiceStrategyContext?.setWorkerChoiceStrategy(
this.opts.workerChoiceStrategy
)
if (workerChoiceStrategyOptions != null) {
/** @inheritDoc */
public setWorkerChoiceStrategyOptions (
- workerChoiceStrategyOptions: WorkerChoiceStrategyOptions
+ workerChoiceStrategyOptions: WorkerChoiceStrategyOptions | undefined
): void {
this.checkValidWorkerChoiceStrategyOptions(workerChoiceStrategyOptions)
- this.opts.workerChoiceStrategyOptions = {
- ...DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS,
- ...workerChoiceStrategyOptions
+ if (workerChoiceStrategyOptions != null) {
+ this.opts.workerChoiceStrategyOptions = workerChoiceStrategyOptions
}
- this.workerChoiceStrategyContext.setOptions(
+ this.workerChoiceStrategyContext?.setOptions(
this.opts.workerChoiceStrategyOptions
)
}
this.flushTasksQueues()
}
this.opts.enableTasksQueue = enable
- this.setTasksQueueOptions(tasksQueueOptions as TasksQueueOptions)
+ this.setTasksQueueOptions(tasksQueueOptions)
}
/** @inheritDoc */
- public setTasksQueueOptions (tasksQueueOptions: TasksQueueOptions): void {
+ public setTasksQueueOptions (
+ tasksQueueOptions: TasksQueueOptions | undefined
+ ): void {
if (this.opts.enableTasksQueue === true) {
checkValidTasksQueueOptions(tasksQueueOptions)
this.opts.tasksQueueOptions =
this.buildTasksQueueOptions(tasksQueueOptions)
- this.setTasksQueueSize(this.opts.tasksQueueOptions.size as number)
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.setTasksQueueSize(this.opts.tasksQueueOptions.size!)
if (this.opts.tasksQueueOptions.taskStealing === true) {
this.unsetTaskStealing()
this.setTaskStealing()
}
private buildTasksQueueOptions (
- tasksQueueOptions: TasksQueueOptions
+ tasksQueueOptions: TasksQueueOptions | undefined
): TasksQueueOptions {
return {
- ...{
- size: Math.pow(this.maxSize, 2),
- concurrency: 1,
- taskStealing: true,
- tasksStealingOnBackPressure: true
- },
+ ...getDefaultTasksQueueOptions(
+ this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers
+ ),
...tasksQueueOptions
}
}
private setTaskStealing (): void {
for (const [workerNodeKey] of this.workerNodes.entries()) {
- this.workerNodes[workerNodeKey].on(
- 'idleWorkerNode',
- this.handleIdleWorkerNodeEvent
- )
+ this.workerNodes[workerNodeKey].on('idle', this.handleWorkerNodeIdleEvent)
}
}
private unsetTaskStealing (): void {
for (const [workerNodeKey] of this.workerNodes.entries()) {
this.workerNodes[workerNodeKey].off(
- 'idleWorkerNode',
- this.handleIdleWorkerNodeEvent
+ 'idle',
+ this.handleWorkerNodeIdleEvent
)
}
}
for (const [workerNodeKey] of this.workerNodes.entries()) {
this.workerNodes[workerNodeKey].on(
'backPressure',
- this.handleBackPressureEvent
+ this.handleWorkerNodeBackPressureEvent
)
}
}
for (const [workerNodeKey] of this.workerNodes.entries()) {
this.workerNodes[workerNodeKey].off(
'backPressure',
- this.handleBackPressureEvent
+ this.handleWorkerNodeBackPressureEvent
)
}
}
* The pool filling boolean status.
*/
protected get full (): boolean {
- return this.workerNodes.length >= this.maxSize
+ return (
+ this.workerNodes.length >=
+ (this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers)
+ )
}
/**
workerNode =>
workerNode.info.ready &&
workerNode.usage.tasks.executing <
- (this.opts.tasksQueueOptions?.concurrency as number)
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.opts.tasksQueueOptions!.concurrency!
) === -1
)
}
if (this.opts.enableTasksQueue === true) {
return (
this.workerNodes[workerNodeKey].usage.tasks.executing >=
- (this.opts.tasksQueueOptions?.concurrency as number)
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.opts.tasksQueueOptions!.concurrency!
)
}
return this.workerNodes[workerNodeKey].usage.tasks.executing > 0
message: MessageValue<Response>
): void => {
this.checkMessageWorkerId(message)
- const workerId = this.getWorkerInfo(workerNodeKey).id as number
+ const workerId = this.getWorkerInfo(workerNodeKey)?.id
if (
message.taskFunctionOperationStatus != null &&
message.workerId === workerId
) {
if (message.taskFunctionOperationStatus) {
resolve(true)
- } else if (!message.taskFunctionOperationStatus) {
+ } else {
reject(
new Error(
- `Task function operation '${
- message.taskFunctionOperation as string
- }' failed on worker ${message.workerId} with error: '${
- message.workerError?.message as string
- }'`
+ `Task function operation '${message.taskFunctionOperation}' failed on worker ${message.workerId} with error: '${message.workerError?.message}'`
)
)
}
new Error(
`Task function operation '${
message.taskFunctionOperation as string
- }' failed on worker ${
- errorResponse?.workerId as number
- } with error: '${
- errorResponse?.workerError?.message as string
+ }' failed on worker ${errorResponse?.workerId} with error: '${
+ errorResponse?.workerError?.message
}'`
)
)
return (
this.tasksQueueSize(workerNodeKey) === 0 &&
this.workerNodes[workerNodeKey].usage.tasks.executing <
- (this.opts.tasksQueueOptions?.concurrency as number)
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.opts.tasksQueueOptions!.concurrency!
)
}
timestamp,
taskId: randomUUID()
}
- this.promiseResponseMap.set(task.taskId as string, {
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.promiseResponseMap.set(task.taskId!, {
resolve,
reject,
workerNodeKey,
(accumulator, workerNode) =>
!workerNode.info.dynamic ? accumulator + 1 : accumulator,
0
- ) < this.numberOfWorkers
+ ) < this.minimumNumberOfWorkers
) {
this.createAndSetupWorkerNode()
}
)
this.emitter?.emit(PoolEvents.destroy, this.info)
this.emitter?.emitDestroy()
- this.emitter?.removeAllListeners()
this.readyEventEmitted = false
this.destroying = false
this.started = false
}
- protected async sendKillMessageToWorker (
- workerNodeKey: number
- ): Promise<void> {
+ private async sendKillMessageToWorker (workerNodeKey: number): Promise<void> {
await new Promise<void>((resolve, reject) => {
+ // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+ if (this.workerNodes[workerNodeKey] == null) {
+ resolve()
+ return
+ }
const killMessageListener = (message: MessageValue<Response>): void => {
this.checkMessageWorkerId(message)
if (message.kill === 'success') {
} else if (message.kill === 'failure') {
reject(
new Error(
- `Kill message handling failed on worker ${
- message.workerId as number
- }`
+ `Kill message handling failed on worker ${message.workerId}`
)
)
}
*
* @param workerNodeKey - The worker node key.
*/
- protected abstract destroyWorkerNode (workerNodeKey: number): Promise<void>
+ protected async destroyWorkerNode (workerNodeKey: number): Promise<void> {
+ this.flagWorkerNodeAsNotReady(workerNodeKey)
+ const flushedTasks = this.flushTasksQueue(workerNodeKey)
+ const workerNode = this.workerNodes[workerNodeKey]
+ await waitWorkerNodeEvents(
+ workerNode,
+ 'taskFinished',
+ flushedTasks,
+ this.opts.tasksQueueOptions?.tasksFinishedTimeout ??
+ getDefaultTasksQueueOptions(
+ this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers
+ ).tasksFinishedTimeout
+ )
+ await this.sendKillMessageToWorker(workerNodeKey)
+ await workerNode.terminate()
+ }
/**
* Setup hook to execute code before worker nodes are created in the abstract constructor.
workerNodeKey: number,
task: Task<Data>
): void {
+ // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
if (this.workerNodes[workerNodeKey]?.usage != null) {
const workerUsage = this.workerNodes[workerNodeKey].usage
++workerUsage.tasks.executing
- this.updateWaitTimeWorkerUsage(workerUsage, task)
+ updateWaitTimeWorkerUsage(
+ this.workerChoiceStrategyContext,
+ workerUsage,
+ task
+ )
}
if (
this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) &&
- this.workerNodes[workerNodeKey].getTaskFunctionWorkerUsage(
- task.name as string
- ) != null
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.workerNodes[workerNodeKey].getTaskFunctionWorkerUsage(task.name!) !=
+ null
) {
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
const taskFunctionWorkerUsage = this.workerNodes[
workerNodeKey
- ].getTaskFunctionWorkerUsage(task.name as string) as WorkerUsage
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ ].getTaskFunctionWorkerUsage(task.name!)!
++taskFunctionWorkerUsage.tasks.executing
- this.updateWaitTimeWorkerUsage(taskFunctionWorkerUsage, task)
+ updateWaitTimeWorkerUsage(
+ this.workerChoiceStrategyContext,
+ taskFunctionWorkerUsage,
+ task
+ )
}
}
workerNodeKey: number,
message: MessageValue<Response>
): void {
+ let needWorkerChoiceStrategyUpdate = false
+ // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
if (this.workerNodes[workerNodeKey]?.usage != null) {
const workerUsage = this.workerNodes[workerNodeKey].usage
- this.updateTaskStatisticsWorkerUsage(workerUsage, message)
- this.updateRunTimeWorkerUsage(workerUsage, message)
- this.updateEluWorkerUsage(workerUsage, message)
+ updateTaskStatisticsWorkerUsage(workerUsage, message)
+ updateRunTimeWorkerUsage(
+ this.workerChoiceStrategyContext,
+ workerUsage,
+ message
+ )
+ updateEluWorkerUsage(
+ this.workerChoiceStrategyContext,
+ workerUsage,
+ message
+ )
+ needWorkerChoiceStrategyUpdate = true
}
if (
this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) &&
this.workerNodes[workerNodeKey].getTaskFunctionWorkerUsage(
- message.taskPerformance?.name as string
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ message.taskPerformance!.name
) != null
) {
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
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)
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ ].getTaskFunctionWorkerUsage(message.taskPerformance!.name)!
+ updateTaskStatisticsWorkerUsage(taskFunctionWorkerUsage, message)
+ updateRunTimeWorkerUsage(
+ this.workerChoiceStrategyContext,
+ taskFunctionWorkerUsage,
+ message
+ )
+ updateEluWorkerUsage(
+ this.workerChoiceStrategyContext,
+ taskFunctionWorkerUsage,
+ message
+ )
+ needWorkerChoiceStrategyUpdate = true
+ }
+ if (needWorkerChoiceStrategyUpdate) {
+ this.workerChoiceStrategyContext?.update(workerNodeKey)
}
}
)
}
- private updateTaskStatisticsWorkerUsage (
- workerUsage: WorkerUsage,
- message: MessageValue<Response>
- ): void {
- const workerTaskStatistics = workerUsage.tasks
- if (
- workerTaskStatistics.executing != null &&
- workerTaskStatistics.executing > 0
- ) {
- --workerTaskStatistics.executing
- }
- if (message.workerError == null) {
- ++workerTaskStatistics.executed
- } else {
- ++workerTaskStatistics.failed
- }
- }
-
- private updateRunTimeWorkerUsage (
- workerUsage: WorkerUsage,
- message: MessageValue<Response>
- ): void {
- if (message.workerError != null) {
- return
- }
- updateMeasurementStatistics(
- workerUsage.runTime,
- this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime,
- message.taskPerformance?.runTime ?? 0
- )
- }
-
- private updateWaitTimeWorkerUsage (
- workerUsage: WorkerUsage,
- task: Task<Data>
- ): void {
- const timestamp = performance.now()
- const taskWaitTime = timestamp - (task.timestamp ?? timestamp)
- updateMeasurementStatistics(
- workerUsage.waitTime,
- this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime,
- taskWaitTime
- )
- }
-
- private updateEluWorkerUsage (
- workerUsage: WorkerUsage,
- message: MessageValue<Response>
- ): void {
- if (message.workerError != null) {
- return
- }
- const eluTaskStatisticsRequirements: MeasurementStatisticsRequirements =
- this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu
- updateMeasurementStatistics(
- workerUsage.elu.active,
- eluTaskStatisticsRequirements,
- message.taskPerformance?.elu?.active ?? 0
- )
- updateMeasurementStatistics(
- workerUsage.elu.idle,
- eluTaskStatisticsRequirements,
- message.taskPerformance?.elu?.idle ?? 0
- )
- if (eluTaskStatisticsRequirements.aggregate) {
- if (message.taskPerformance?.elu != null) {
- if (workerUsage.elu.utilization != null) {
- workerUsage.elu.utilization =
- (workerUsage.elu.utilization +
- message.taskPerformance.elu.utilization) /
- 2
- } else {
- workerUsage.elu.utilization = message.taskPerformance.elu.utilization
- }
- }
- }
- }
-
/**
* Chooses a worker node for the next task.
*
if (this.shallCreateDynamicWorker()) {
const workerNodeKey = this.createAndSetupDynamicWorkerNode()
if (
- this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerUsage
+ this.workerChoiceStrategyContext?.getStrategyPolicy()
+ .dynamicWorkerUsage === true
) {
return workerNodeKey
}
}
- return this.workerChoiceStrategyContext.execute()
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ return this.workerChoiceStrategyContext!.execute()
}
/**
*
* @returns Whether to create a dynamic worker or not.
*/
- private shallCreateDynamicWorker (): boolean {
- return this.type === PoolTypes.dynamic && !this.full && this.internalBusy()
- }
+ protected abstract shallCreateDynamicWorker (): boolean
/**
* Sends a message to worker given its worker node key.
transferList?: TransferListItem[]
): void
- /**
- * Creates a new worker.
- *
- * @returns Newly created worker.
- */
- protected abstract createWorker (): Worker
-
/**
* Creates a new, completely set up worker node.
*
* @returns New, completely set up worker node key.
*/
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)
- this.flagWorkerNodeAsNotReady(workerNodeKey)
- const workerInfo = this.getWorkerInfo(workerNodeKey)
+ const workerNode = this.createWorkerNode()
+ workerNode.registerWorkerEventHandler(
+ 'online',
+ this.opts.onlineHandler ?? EMPTY_FUNCTION
+ )
+ workerNode.registerWorkerEventHandler(
+ 'message',
+ this.opts.messageHandler ?? EMPTY_FUNCTION
+ )
+ workerNode.registerWorkerEventHandler(
+ 'error',
+ this.opts.errorHandler ?? EMPTY_FUNCTION
+ )
+ workerNode.registerWorkerEventHandler('error', (error: Error) => {
+ workerNode.info.ready = false
this.emitter?.emit(PoolEvents.error, error)
- this.workerNodes[workerNodeKey].closeChannel()
if (
this.started &&
- !this.starting &&
!this.destroying &&
this.opts.restartWorkerOnError === true
) {
- if (workerInfo.dynamic) {
+ if (workerNode.info.dynamic) {
this.createAndSetupDynamicWorkerNode()
} else {
this.createAndSetupWorkerNode()
}
}
- if (this.started && this.opts.enableTasksQueue === true) {
- this.redistributeQueuedTasks(workerNodeKey)
+ if (
+ this.started &&
+ !this.destroying &&
+ this.opts.enableTasksQueue === true
+ ) {
+ this.redistributeQueuedTasks(this.workerNodes.indexOf(workerNode))
}
+ // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+ workerNode?.terminate().catch((error: unknown) => {
+ this.emitter?.emit(PoolEvents.error, error)
+ })
})
- worker.on('exit', this.opts.exitHandler ?? EMPTY_FUNCTION)
- worker.once('exit', () => {
- this.removeWorkerNode(worker)
+ workerNode.registerWorkerEventHandler(
+ 'exit',
+ this.opts.exitHandler ?? EMPTY_FUNCTION
+ )
+ workerNode.registerOnceWorkerEventHandler('exit', () => {
+ this.removeWorkerNode(workerNode)
})
-
- const workerNodeKey = this.addWorkerNode(worker)
-
+ const workerNodeKey = this.addWorkerNode(workerNode)
this.afterWorkerNodeSetup(workerNodeKey)
-
return workerNodeKey
}
const localWorkerNodeKey = this.getWorkerNodeKeyByWorkerId(
message.workerId
)
- const workerUsage = this.workerNodes[localWorkerNodeKey].usage
+ const workerUsage = this.workerNodes[localWorkerNodeKey]?.usage
// Kill message received from worker
if (
isKillBehavior(KillBehaviors.HARD, message.kill) ||
) {
// Flag the worker node as not ready immediately
this.flagWorkerNodeAsNotReady(localWorkerNodeKey)
- this.destroyWorkerNode(localWorkerNodeKey).catch(error => {
+ this.destroyWorkerNode(localWorkerNodeKey).catch((error: unknown) => {
this.emitter?.emit(PoolEvents.error, error)
})
}
})
- const workerInfo = this.getWorkerInfo(workerNodeKey)
this.sendToWorker(workerNodeKey, {
checkActive: true
})
taskFunctionOperation: 'add',
taskFunctionName,
taskFunction: taskFunction.toString()
- }).catch(error => {
+ }).catch((error: unknown) => {
this.emitter?.emit(PoolEvents.error, error)
})
}
}
- workerInfo.dynamic = true
+ const workerNode = this.workerNodes[workerNodeKey]
+ workerNode.info.dynamic = true
if (
- this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerReady ||
- this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerUsage
+ this.workerChoiceStrategyContext?.getStrategyPolicy()
+ .dynamicWorkerReady === true ||
+ this.workerChoiceStrategyContext?.getStrategyPolicy()
+ .dynamicWorkerUsage === true
) {
- workerInfo.ready = true
+ workerNode.info.ready = true
}
this.checkAndEmitDynamicWorkerCreationEvents()
return workerNodeKey
if (this.opts.enableTasksQueue === true) {
if (this.opts.tasksQueueOptions?.taskStealing === true) {
this.workerNodes[workerNodeKey].on(
- 'idleWorkerNode',
- this.handleIdleWorkerNodeEvent
+ 'idle',
+ this.handleWorkerNodeIdleEvent
)
}
if (this.opts.tasksQueueOptions?.tasksStealingOnBackPressure === true) {
this.workerNodes[workerNodeKey].on(
'backPressure',
- this.handleBackPressureEvent
+ this.handleWorkerNodeBackPressureEvent
)
}
}
this.sendToWorker(workerNodeKey, {
statistics: {
runTime:
- this.workerChoiceStrategyContext.getTaskStatisticsRequirements()
- .runTime.aggregate,
- elu: this.workerChoiceStrategyContext.getTaskStatisticsRequirements()
- .elu.aggregate
+ this.workerChoiceStrategyContext?.getTaskStatisticsRequirements()
+ .runTime.aggregate ?? false,
+ elu:
+ this.workerChoiceStrategyContext?.getTaskStatisticsRequirements().elu
+ .aggregate ?? false
}
})
}
+ private cannotStealTask (): boolean {
+ return this.workerNodes.length <= 1 || this.info.queuedTasks === 0
+ }
+
private handleTask (workerNodeKey: number, task: Task<Data>): void {
if (this.shallExecuteTask(workerNodeKey)) {
this.executeTask(workerNodeKey, task)
}
private redistributeQueuedTasks (workerNodeKey: number): void {
- if (this.workerNodes.length <= 1) {
+ if (workerNodeKey === -1 || this.cannotStealTask()) {
return
}
while (this.tasksQueueSize(workerNodeKey) > 0) {
)
this.handleTask(
destinationWorkerNodeKey,
- this.dequeueTask(workerNodeKey) as Task<Data>
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.dequeueTask(workerNodeKey)!
)
}
}
taskName: string
): void {
const workerNode = this.workerNodes[workerNodeKey]
+ // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
if (workerNode?.usage != null) {
++workerNode.usage.tasks.stolen
}
this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) &&
workerNode.getTaskFunctionWorkerUsage(taskName) != null
) {
- const taskFunctionWorkerUsage = workerNode.getTaskFunctionWorkerUsage(
- taskName
- ) as WorkerUsage
+ const taskFunctionWorkerUsage =
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ workerNode.getTaskFunctionWorkerUsage(taskName)!
++taskFunctionWorkerUsage.tasks.stolen
}
}
workerNodeKey: number
): void {
const workerNode = this.workerNodes[workerNodeKey]
+ // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
if (workerNode?.usage != null) {
++workerNode.usage.tasks.sequentiallyStolen
}
this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) &&
workerNode.getTaskFunctionWorkerUsage(taskName) != null
) {
- const taskFunctionWorkerUsage = workerNode.getTaskFunctionWorkerUsage(
- taskName
- ) as WorkerUsage
+ const taskFunctionWorkerUsage =
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ workerNode.getTaskFunctionWorkerUsage(taskName)!
++taskFunctionWorkerUsage.tasks.sequentiallyStolen
}
}
workerNodeKey: number
): void {
const workerNode = this.workerNodes[workerNodeKey]
+ // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
if (workerNode?.usage != null) {
workerNode.usage.tasks.sequentiallyStolen = 0
}
this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) &&
workerNode.getTaskFunctionWorkerUsage(taskName) != null
) {
- const taskFunctionWorkerUsage = workerNode.getTaskFunctionWorkerUsage(
- taskName
- ) as WorkerUsage
+ const taskFunctionWorkerUsage =
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ workerNode.getTaskFunctionWorkerUsage(taskName)!
taskFunctionWorkerUsage.tasks.sequentiallyStolen = 0
}
}
- private readonly handleIdleWorkerNodeEvent = (
+ private readonly handleWorkerNodeIdleEvent = (
eventDetail: WorkerNodeEventDetail,
previousStolenTask?: Task<Data>
): void => {
- if (this.workerNodes.length <= 1) {
- return
- }
const { workerNodeKey } = eventDetail
if (workerNodeKey == null) {
throw new Error(
- 'WorkerNode event detail workerNodeKey attribute must be defined'
+ "WorkerNode event detail 'workerNodeKey' property must be defined"
)
}
+ const workerInfo = this.getWorkerInfo(workerNodeKey)
+ if (
+ this.cannotStealTask() ||
+ (this.info.stealingWorkerNodes ?? 0) >
+ Math.floor(this.workerNodes.length / 2)
+ ) {
+ if (workerInfo != null && previousStolenTask != null) {
+ workerInfo.stealing = false
+ }
+ return
+ }
const workerNodeTasksUsage = this.workerNodes[workerNodeKey].usage.tasks
if (
+ workerInfo != null &&
previousStolenTask != null &&
workerNodeTasksUsage.sequentiallyStolen > 0 &&
(workerNodeTasksUsage.executing > 0 ||
this.tasksQueueSize(workerNodeKey) > 0)
) {
- for (const taskName of this.workerNodes[workerNodeKey].info
- .taskFunctionNames as string[]) {
+ workerInfo.stealing = false
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ for (const taskName of workerInfo.taskFunctionNames!) {
this.resetTaskSequentiallyStolenStatisticsTaskFunctionWorkerUsage(
workerNodeKey,
taskName
this.resetTaskSequentiallyStolenStatisticsWorkerUsage(workerNodeKey)
return
}
+ if (workerInfo == null) {
+ throw new Error(
+ `Worker node with key '${workerNodeKey}' not found in pool`
+ )
+ }
+ workerInfo.stealing = true
const stolenTask = this.workerNodeStealTask(workerNodeKey)
if (
this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) &&
stolenTask != null
) {
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
const taskFunctionTasksWorkerUsage = this.workerNodes[
workerNodeKey
- ].getTaskFunctionWorkerUsage(stolenTask.name as string)
- ?.tasks as TaskStatistics
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ ].getTaskFunctionWorkerUsage(stolenTask.name!)!.tasks
if (
taskFunctionTasksWorkerUsage.sequentiallyStolen === 0 ||
(previousStolenTask != null &&
) {
this.updateTaskSequentiallyStolenStatisticsTaskFunctionWorkerUsage(
workerNodeKey,
- stolenTask.name as string
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ stolenTask.name!
)
} else {
this.resetTaskSequentiallyStolenStatisticsTaskFunctionWorkerUsage(
workerNodeKey,
- stolenTask.name as string
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ stolenTask.name!
)
}
}
sleep(exponentialDelay(workerNodeTasksUsage.sequentiallyStolen))
.then(() => {
- this.handleIdleWorkerNodeEvent(eventDetail, stolenTask)
+ this.handleWorkerNodeIdleEvent(eventDetail, stolenTask)
return undefined
})
- .catch(EMPTY_FUNCTION)
+ .catch((error: unknown) => {
+ this.emitter?.emit(PoolEvents.error, error)
+ })
}
private readonly workerNodeStealTask = (
const sourceWorkerNode = workerNodes.find(
(sourceWorkerNode, sourceWorkerNodeKey) =>
sourceWorkerNode.info.ready &&
+ !sourceWorkerNode.info.stealing &&
sourceWorkerNodeKey !== workerNodeKey &&
sourceWorkerNode.usage.tasks.queued > 0
)
if (sourceWorkerNode != null) {
- const task = sourceWorkerNode.popTask() as Task<Data>
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ const task = sourceWorkerNode.popTask()!
this.handleTask(workerNodeKey, task)
this.updateTaskSequentiallyStolenStatisticsWorkerUsage(workerNodeKey)
- this.updateTaskStolenStatisticsWorkerUsage(
- workerNodeKey,
- task.name as string
- )
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.updateTaskStolenStatisticsWorkerUsage(workerNodeKey, task.name!)
return task
}
}
- private readonly handleBackPressureEvent = (
+ private readonly handleWorkerNodeBackPressureEvent = (
eventDetail: WorkerNodeEventDetail
): void => {
- if (this.workerNodes.length <= 1) {
+ if (
+ this.cannotStealTask() ||
+ (this.info.stealingWorkerNodes ?? 0) >
+ Math.floor(this.workerNodes.length / 2)
+ ) {
return
}
const { workerId } = eventDetail
const sizeOffset = 1
- if ((this.opts.tasksQueueOptions?.size as number) <= sizeOffset) {
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ if (this.opts.tasksQueueOptions!.size! <= sizeOffset) {
return
}
const sourceWorkerNode =
if (
sourceWorkerNode.usage.tasks.queued > 0 &&
workerNode.info.ready &&
+ !workerNode.info.stealing &&
workerNode.info.id !== workerId &&
workerNode.usage.tasks.queued <
- (this.opts.tasksQueueOptions?.size as number) - sizeOffset
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.opts.tasksQueueOptions!.size! - sizeOffset
) {
- const task = sourceWorkerNode.popTask() as Task<Data>
+ const workerInfo = this.getWorkerInfo(workerNodeKey)
+ if (workerInfo == null) {
+ throw new Error(
+ `Worker node with key '${workerNodeKey}' not found in pool`
+ )
+ }
+ workerInfo.stealing = true
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ const task = sourceWorkerNode.popTask()!
this.handleTask(workerNodeKey, task)
- this.updateTaskStolenStatisticsWorkerUsage(
- workerNodeKey,
- task.name as string
- )
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.updateTaskStolenStatisticsWorkerUsage(workerNodeKey, task.name!)
+ workerInfo.stealing = false
}
}
}
this.handleTaskExecutionResponse(message)
} else if (taskFunctionNames != null) {
// Task function names message received from worker
- this.getWorkerInfo(
+ const workerInfo = this.getWorkerInfo(
this.getWorkerNodeKeyByWorkerId(workerId)
- ).taskFunctionNames = taskFunctionNames
+ )
+ if (workerInfo != null) {
+ workerInfo.taskFunctionNames = taskFunctionNames
+ }
}
}
- private handleWorkerReadyResponse (message: MessageValue<Response>): void {
- const { workerId, ready, taskFunctionNames } = message
- if (ready === false) {
- throw new Error(`Worker ${workerId as number} failed to initialize`)
- }
- const workerInfo = this.getWorkerInfo(
- this.getWorkerNodeKeyByWorkerId(workerId)
- )
- workerInfo.ready = ready as boolean
- workerInfo.taskFunctionNames = taskFunctionNames
+ private checkAndEmitReadyEvent (): void {
if (!this.readyEventEmitted && this.ready) {
- this.readyEventEmitted = true
this.emitter?.emit(PoolEvents.ready, this.info)
+ this.readyEventEmitted = true
}
}
+ private handleWorkerReadyResponse (message: MessageValue<Response>): void {
+ const { workerId, ready, taskFunctionNames } = message
+ if (ready == null || !ready) {
+ throw new Error(`Worker ${workerId} failed to initialize`)
+ }
+ const workerNode =
+ this.workerNodes[this.getWorkerNodeKeyByWorkerId(workerId)]
+ workerNode.info.ready = ready
+ workerNode.info.taskFunctionNames = taskFunctionNames
+ this.checkAndEmitReadyEvent()
+ }
+
private handleTaskExecutionResponse (message: MessageValue<Response>): void {
const { workerId, taskId, workerError, data } = message
- const promiseResponse = this.promiseResponseMap.get(taskId as string)
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ const promiseResponse = this.promiseResponseMap.get(taskId!)
if (promiseResponse != null) {
const { resolve, reject, workerNodeKey, asyncResource } = promiseResponse
+ const workerNode = this.workerNodes[workerNodeKey]
if (workerError != null) {
this.emitter?.emit(PoolEvents.taskError, workerError)
asyncResource != null
}
asyncResource?.emitDestroy()
this.afterTaskExecutionHook(workerNodeKey, message)
- this.workerChoiceStrategyContext.update(workerNodeKey)
- this.promiseResponseMap.delete(taskId as string)
- if (this.opts.enableTasksQueue === true) {
- const workerNodeTasksUsage = this.workerNodes[workerNodeKey].usage.tasks
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.promiseResponseMap.delete(taskId!)
+ // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+ workerNode?.emit('taskFinished', taskId)
+ if (
+ this.opts.enableTasksQueue === true &&
+ !this.destroying &&
+ // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+ workerNode != null
+ ) {
+ const workerNodeTasksUsage = workerNode.usage.tasks
if (
this.tasksQueueSize(workerNodeKey) > 0 &&
workerNodeTasksUsage.executing <
- (this.opts.tasksQueueOptions?.concurrency as number)
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.opts.tasksQueueOptions!.concurrency!
) {
- this.executeTask(
- workerNodeKey,
- this.dequeueTask(workerNodeKey) as Task<Data>
- )
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.executeTask(workerNodeKey, this.dequeueTask(workerNodeKey)!)
}
if (
workerNodeTasksUsage.executing === 0 &&
this.tasksQueueSize(workerNodeKey) === 0 &&
workerNodeTasksUsage.sequentiallyStolen === 0
) {
- this.workerNodes[workerNodeKey].emit('idleWorkerNode', {
- workerId: workerId as number,
+ workerNode.emit('idle', {
+ workerId,
workerNodeKey
})
}
}
}
- private checkAndEmitDynamicWorkerCreationEvents (): void {
- if (this.type === PoolTypes.dynamic) {
- if (this.full) {
- this.emitter?.emit(PoolEvents.full, this.info)
- }
- }
- }
+ /**
+ * Emits dynamic worker creation events.
+ */
+ protected abstract checkAndEmitDynamicWorkerCreationEvents (): void
/**
* Gets the worker information given its worker node key.
* @param workerNodeKey - The worker node key.
* @returns The worker information.
*/
- protected getWorkerInfo (workerNodeKey: number): WorkerInfo {
+ protected getWorkerInfo (workerNodeKey: number): WorkerInfo | undefined {
return this.workerNodes[workerNodeKey]?.info
}
/**
- * Adds the given worker in the pool worker nodes.
+ * Creates a worker node.
*
- * @param worker - The worker.
- * @returns The added worker node key.
- * @throws {@link https://nodejs.org/api/errors.html#class-error} If the added worker node is not found.
+ * @returns The created worker node.
*/
- private addWorkerNode (worker: Worker): number {
+ private createWorkerNode (): IWorkerNode<Worker, Data> {
const workerNode = new WorkerNode<Worker, Data>(
- worker,
- this.opts.tasksQueueOptions?.size ?? Math.pow(this.maxSize, 2)
+ this.worker,
+ this.filePath,
+ {
+ env: this.opts.env,
+ workerOptions: this.opts.workerOptions,
+ tasksQueueBackPressureSize:
+ this.opts.tasksQueueOptions?.size ??
+ getDefaultTasksQueueOptions(
+ this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers
+ ).size
+ }
)
// Flag the worker node as ready at pool startup.
if (this.starting) {
workerNode.info.ready = true
}
+ return workerNode
+ }
+
+ /**
+ * Adds the given worker node in the pool worker nodes.
+ *
+ * @param workerNode - The worker node.
+ * @returns The added worker node key.
+ * @throws {@link https://nodejs.org/api/errors.html#class-error} If the added worker node is not found.
+ */
+ private addWorkerNode (workerNode: IWorkerNode<Worker, Data>): number {
this.workerNodes.push(workerNode)
- const workerNodeKey = this.getWorkerNodeKeyByWorker(worker)
+ const workerNodeKey = this.workerNodes.indexOf(workerNode)
if (workerNodeKey === -1) {
throw new Error('Worker added not found in worker nodes')
}
return workerNodeKey
}
+ private checkAndEmitEmptyEvent (): void {
+ if (this.empty) {
+ this.emitter?.emit(PoolEvents.empty, this.info)
+ this.readyEventEmitted = false
+ }
+ }
+
/**
- * Removes the given worker from the pool worker nodes.
+ * Removes the worker node from the pool worker nodes.
*
- * @param worker - The worker.
+ * @param workerNode - The worker node.
*/
- private removeWorkerNode (worker: Worker): void {
- const workerNodeKey = this.getWorkerNodeKeyByWorker(worker)
+ private removeWorkerNode (workerNode: IWorkerNode<Worker, Data>): void {
+ const workerNodeKey = this.workerNodes.indexOf(workerNode)
if (workerNodeKey !== -1) {
this.workerNodes.splice(workerNodeKey, 1)
- this.workerChoiceStrategyContext.remove(workerNodeKey)
+ this.workerChoiceStrategyContext?.remove(workerNodeKey)
}
+ this.checkAndEmitEmptyEvent()
}
protected flagWorkerNodeAsNotReady (workerNodeKey: number): void {
- this.getWorkerInfo(workerNodeKey).ready = false
- }
-
- /** @inheritDoc */
- public hasWorkerNodeBackPressure (workerNodeKey: number): boolean {
- return (
- this.opts.enableTasksQueue === true &&
- this.workerNodes[workerNodeKey].hasBackPressure()
- )
+ const workerInfo = this.getWorkerInfo(workerNodeKey)
+ if (workerInfo != null) {
+ workerInfo.ready = false
+ }
}
private hasBackPressure (): boolean {
return this.workerNodes[workerNodeKey].tasksQueueSize()
}
- protected flushTasksQueue (workerNodeKey: number): void {
+ protected flushTasksQueue (workerNodeKey: number): number {
+ let flushedTasks = 0
while (this.tasksQueueSize(workerNodeKey) > 0) {
- this.executeTask(
- workerNodeKey,
- this.dequeueTask(workerNodeKey) as Task<Data>
- )
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.executeTask(workerNodeKey, this.dequeueTask(workerNodeKey)!)
+ ++flushedTasks
}
this.workerNodes[workerNodeKey].clearTasksQueue()
+ return flushedTasks
}
private flushTasksQueues (): void {
repositories / poolifier.git / blobdiff