Class ClusterWorker<Data, Response>

A cluster worker used by a poolifier ClusterPool.

When this worker is inactive for more than the given maxInactiveTime, it will send a termination request to its main worker.

If you use a DynamicClusterPool the extra workers that were created will be terminated, but the minimum number of workers will be guaranteed.

Author

Christopher Quadflieg

Since

2.0.0

Type Parameters

Data = unknown
Type of data this worker receives from pool's execution. This can only be structured-cloneable data.
Response = unknown
Type of response the worker sends back to the main worker. This can only be structured-cloneable data.

Hierarchy (view full)

AbstractWorker<Worker, Data, Response>
- ClusterWorker

Constructors

constructor

new ClusterWorker<Data, Response>(taskFunctions, opts?): ClusterWorker<Data, Response>
Constructs a new poolifier cluster worker.
Type Parameters
- Data = unknown
- Response = unknown
Parameters
- taskFunctions: TaskFunction<Data, Response> | TaskFunctions<Data, Response>
  Task function(s) processed by the worker when the pool's execute method is invoked.
- opts: WorkerOptions = {}
  Options for the worker.
Returns ClusterWorker<Data, Response>
Overrides AbstractWorker.constructor
- Defined in src/worker/cluster-worker.ts:41

Properties

`Protected` `Optional`activeInterval

activeInterval?: Timeout

Handler id of the activeInterval worker activity check.

`Protected` `Readonly`isMain

isMain: undefined | boolean

Whether this is the main worker or not.

`Protected`lastTaskTimestamp

lastTaskTimestamp: number

Timestamp of the last task processed by this worker.

`Protected`opts

opts: WorkerOptions = DEFAULT_WORKER_OPTIONS

Options for the worker.

`Protected` `Optional`statistics

statistics?: WorkerStatistics

Performance statistics computation requirements.

`Protected`taskFunctions

taskFunctions: Map<string, TaskFunctionObject<Data, Response>>

Task function object(s) processed by the worker when the pool's execute method is invoked.

Accessors

`Protected`id

get id(): number
Worker id.

Returns number
Overrides AbstractWorker.id
- Defined in src/worker/cluster-worker.ts:74

Methods

addTaskFunction

addTaskFunction(name, fn): TaskFunctionOperationResult
Adds a task function to the worker. If a task function with the same name already exists, it is replaced.
Parameters
- name: string
  The name of the task function to add.
- fn: TaskFunction<Data, Response> | TaskFunctionObject<Data, Response>
  The task function to add.
Returns TaskFunctionOperationResult
Whether the task function was added or not.
Inherited from AbstractWorker.addTaskFunction
- Defined in src/worker/abstract-worker.ts:516

`Protected`getMainWorker

getMainWorker(): Worker
Returns the main worker.

Returns Worker
Reference to the main worker.

Throws
https://nodejs.org/api/errors.html#class-error If the main worker is not set.
Inherited from AbstractWorker.getMainWorker
- Defined in src/worker/abstract-worker.ts:215

`Protected`handleError

handleError(error): {
message: string;
stack?: string;
}
Handles a worker error.
Parameters
- error: Error
  The error raised by the worker.
Returns {
message: string;
stack?: string;
}
The worker error object.
- message: string
- Optionalstack?: string
Overrides AbstractWorker.handleError
- Defined in src/worker/cluster-worker.ts:51

`Protected`handleKillMessage

handleKillMessage(message): void
Handles a kill message sent by the main worker.
Parameters
- message: MessageValue<Data, unknown>
  The kill message.
Returns void
Inherited from AbstractWorker.handleKillMessage
- Defined in src/worker/abstract-worker.ts:237

`Protected`handleReadyMessage

handleReadyMessage(message): void
Handles the ready message sent by the main worker.
Parameters
- message: MessageValue<Data, unknown>
  The ready message.
Returns void
Overrides AbstractWorker.handleReadyMessage
- Defined in src/worker/cluster-worker.ts:56

`Protected`handleTaskFunctionOperationMessage

handleTaskFunctionOperationMessage(message): void
Parameters
- message: MessageValue<Data, unknown>
Returns void
Inherited from AbstractWorker.handleTaskFunctionOperationMessage
- Defined in src/worker/abstract-worker.ts:264

hasTaskFunction

hasTaskFunction(name): TaskFunctionOperationResult
Checks if the worker has a task function with the given name.
Parameters
- name: string
  The name of the task function to check.
Returns TaskFunctionOperationResult
Whether the worker has a task function with the given name or not.
Inherited from AbstractWorker.hasTaskFunction
- Defined in src/worker/abstract-worker.ts:551

listTaskFunctionsProperties

listTaskFunctionsProperties(): TaskFunctionProperties[]
Lists the properties of the worker's task functions.

Returns TaskFunctionProperties[]
The properties of the worker's task functions.
Inherited from AbstractWorker.listTaskFunctionsProperties
- Defined in src/worker/abstract-worker.ts:564

`Protected`messageListener

messageListener(message): void
Worker message listener.
Parameters
- message: MessageValue<Data, unknown>
  The received message.
Returns void
Inherited from AbstractWorker.messageListener
- Defined in src/worker/abstract-worker.ts:324

removeTaskFunction

removeTaskFunction(name): TaskFunctionOperationResult
Removes a task function from the worker.
Parameters
- name: string
  The name of the task function to remove.
Returns TaskFunctionOperationResult
Whether the task function existed and was removed or not.
Inherited from AbstractWorker.removeTaskFunction
- Defined in src/worker/abstract-worker.ts:600

`Protected` `Readonly`run

run(task): void
Runs the given task.
Parameters
- task: Task<Data>
  The task to execute.
Returns void
Inherited from AbstractWorker.run
- Defined in src/worker/abstract-worker.ts:81

`Protected` `Readonly`runAsync

runAsync(fn, task): void
Runs the given task function asynchronously.
Parameters
- fn: TaskAsyncFunction<Data, Response>
  Task function that will be executed.
- task: Task<Data>
  Input data for the task function.
Returns void
Inherited from AbstractWorker.runAsync
- Defined in src/worker/abstract-worker.ts:111

`Protected` `Readonly`runSync

runSync(fn, task): void
Runs the given task function synchronously.
Parameters
- fn: TaskSyncFunction<Data, Response>
  Task function that will be executed.
- task: Task<Data>
  Input data for the task function.
Returns void
Inherited from AbstractWorker.runSync
- Defined in src/worker/abstract-worker.ts:148

`Protected`sendTaskFunctionsPropertiesToMainWorker

sendTaskFunctionsPropertiesToMainWorker(): void
Sends task functions properties to the main worker.

Returns void
Inherited from AbstractWorker.sendTaskFunctionsPropertiesToMainWorker
- Defined in src/worker/abstract-worker.ts:355

`Protected` `Readonly`sendToMainWorker

sendToMainWorker(message): void
Sends a message to main worker.
Parameters
- message: MessageValue<Response, unknown>
  The response message.
Returns void
Overrides AbstractWorker.sendToMainWorker
- Defined in src/worker/cluster-worker.ts:27

setDefaultTaskFunction

setDefaultTaskFunction(name): TaskFunctionOperationResult
Sets the default task function to use in the worker.
Parameters
- name: string
  The name of the task function to use as default task function.
Returns TaskFunctionOperationResult
Whether the default task function was set or not.
Inherited from AbstractWorker.setDefaultTaskFunction
- Defined in src/worker/abstract-worker.ts:629

Class ClusterWorker<Data, Response>

Author

Since

Type Parameters

Hierarchy (view full)

Index

Constructors

Properties

Accessors

Methods

Constructors

constructor

Type Parameters

Parameters

Returns ClusterWorker<Data, Response>

Properties

Protected OptionalactiveInterval

Protected ReadonlyisMain

ProtectedlastTaskTimestamp

Protectedopts

Protected Optionalstatistics

ProtectedtaskFunctions

Accessors

Protectedid

Returns number

Methods

addTaskFunction

Parameters

Returns TaskFunctionOperationResult

ProtectedgetMainWorker

Returns Worker

Throws

ProtectedhandleError

Parameters

Returns { message: string; stack?: string; }

message: string

Optionalstack?: string

ProtectedhandleKillMessage

Parameters

Returns void

ProtectedhandleReadyMessage

Parameters

Returns void

ProtectedhandleTaskFunctionOperationMessage

Parameters

Returns void

hasTaskFunction

Parameters

Returns TaskFunctionOperationResult

listTaskFunctionsProperties

Returns TaskFunctionProperties[]

ProtectedmessageListener

Parameters

Returns void

removeTaskFunction

Parameters

Returns TaskFunctionOperationResult

Protected Readonlyrun

Parameters

Returns void

Protected ReadonlyrunAsync

Parameters

Returns void

Protected ReadonlyrunSync

Parameters

Returns void

ProtectedsendTaskFunctionsPropertiesToMainWorker

Returns void

Protected ReadonlysendToMainWorker

Parameters

Returns void

setDefaultTaskFunction

Parameters

Returns TaskFunctionOperationResult

Settings

On This Page

`Protected` `Optional`activeInterval

`Protected` `Readonly`isMain

`Protected`lastTaskTimestamp

`Protected`opts

`Protected` `Optional`statistics

`Protected`taskFunctions

`Protected`id

`Protected`getMainWorker

`Protected`handleError

Returns {
message: string;
stack?: string;
}

`Optional`stack?: string

`Protected`handleKillMessage

`Protected`handleReadyMessage

`Protected`handleTaskFunctionOperationMessage

`Protected`messageListener

`Protected` `Readonly`run

`Protected` `Readonly`runAsync

`Protected` `Readonly`runSync

`Protected`sendTaskFunctionsPropertiesToMainWorker

`Protected` `Readonly`sendToMainWorker