Class FixedThreadPool<Data, Response>

A thread pool with a fixed number of threads.

It is possible to perform tasks in sync or asynchronous mode as you prefer.

This pool selects the threads in a round robin fashion.

Template

of data sent to the worker. This can only be serializable data.

Template

of response of execution. This can only be serializable data.

Author

Alessandro Pio Ardizio

Since

0.0.1

Type Parameters

  • Data = unknown

  • Response = unknown

Hierarchy

Constructors

Properties

emitter?: PoolEmitter

Inherit Doc

filePath: string
max?: number

Inherit Doc

nextMessageId: number = 0

Id of the next message.

numberOfWorkers: number
promiseMap: Map<number, PromiseWorkerResponseWrapper<ThreadWorkerWithMessageChannel, Response>> = ...

The promise map.

  • key: This is the message Id of each submitted task.
  • value: An object that contains the worker, the resolve function and the reject function.

When we receive a message from the worker we get a map entry and resolve/reject the promise based on the message.

workerChoiceStrategyContext: WorkerChoiceStrategyContext<ThreadWorkerWithMessageChannel, Data, Response>

Worker choice strategy instance implementing the worker choice algorithm.

Default to a strategy implementing a round robin algorithm.

Inherit Doc

workersTasksUsage: Map<ThreadWorkerWithMessageChannel, TasksUsage> = ...

Inherit Doc

Accessors

  • get numberOfRunningTasks(): number
  • Inherit Doc

    Returns number

Methods

  • Hook executed after the worker task promise resolution. Can be overridden.

    Parameters

    • message: MessageValue<Response, unknown>

      The received message.

    • promise: PromiseWorkerResponseWrapper<ThreadWorkerWithMessageChannel, Response>

      The Promise response.

    Returns void

  • Inherit Doc

    Parameters

    • data: Data

    Returns Promise<Response>

  • Inherit Doc

    Type Parameters

    • Message

    Parameters

    • messageChannel: ThreadWorkerWithMessageChannel
    • listener: ((message: MessageValue<Message, unknown>) => void)
        • (message: MessageValue<Message, unknown>): void
        • Parameters

          • message: MessageValue<Message, unknown>

          Returns void

    Returns void

  • Inherit Doc

    Parameters

    • workerChoiceStrategy: "ROUND_ROBIN" | "LESS_RECENTLY_USED" | "FAIR_SHARE" | "WEIGHTED_ROUND_ROBIN"

    Returns void

  • Setup hook that can be overridden by a Poolifier pool implementation to run code before workers are created in the abstract constructor.

    Returns void

  • This function is the listener registered for each worker.

    Returns

    The listener function to execute when a message is received from a worker.

    Returns ((message: MessageValue<Response, unknown>) => void)

      • (message: MessageValue<Response, unknown>): void
      • This function is the listener registered for each worker.

        Returns

        The listener function to execute when a message is received from a worker.

        Parameters

        • message: MessageValue<Response, unknown>

        Returns void

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