Type of data sent to the worker. This can only be serializable data.
Type of execution response. This can only be serializable data.
Constructs a new poolifier fixed cluster pool.
Number of workers for this pool.
Path to an implementation of a ClusterWorker file, which can be relative or absolute.
Options for this fixed cluster pool.
Optional Readonly emitterEmitter on which events can be listened to.
Events that can currently be listened to:
'full': Emitted when the pool is dynamic and full.'busy': Emitted when the pool is busy.Readonly filePath to the worker file.
Readonly numberNumber of workers that this pool should manage.
Readonly optsOptions for this fixed cluster pool.
Protected promiseThe 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.When we receive a message from the worker, we get a map entry with the promise resolve/reject bound to the message id.
Protected workerWorker choice strategy context referencing a worker choice algorithm implementation.
Default to a round robin algorithm.
Readonly workerPool worker nodes.
Protected busyWhether the pool is busy or not.
The pool busyness boolean status.
Protected fullWhether the pool is full or not.
The pool filling boolean status.
Private numberNumber of tasks queued in the pool.
Private numberNumber of tasks running in the pool.
Protected afterHook executed after the worker task execution. Can be overridden.
The worker.
The received message.
Protected afterFunction that can be hooked up when a worker has been newly created and moved to the pool worker nodes.
Can be used to update the maxListeners or binding the main-worker<->worker connection if not bind by default.
The newly created worker.
Protected beforeProtected chooseChooses a worker node for the next task.
The default uses a round robin algorithm to distribute the load.
[worker node key, worker node].
Protected createProtected createProtected destroyEnables/disables the worker tasks queue in this pool.
Whether to enable or disable the worker tasks queue.
Optional tasksQueueOptions: TasksQueueOptionsThe worker tasks queue options.
Executes the function specified in the worker constructor with the task data input parameter.
Promise that will be fulfilled when the task is completed.
Optional data: DataThe task input data for the specified worker function. This can only be serializable data.
Finds a free worker node key based on the number of tasks the worker has applied.
If a worker is found with 0 running tasks, it is detected as free and its worker node key is returned.
If no free worker is found, -1 is returned.
A worker node key if there is one, -1 otherwise.
Protected internalProtected isProtected registerRegisters a listener callback on the given worker.
The worker which should register a listener.
The message listener callback.
Protected sendSends a message to the given worker.
The worker which should receive the message.
The message.
Sets the worker tasks queue options in this pool.
The worker tasks queue options.
Sets the worker choice strategy in this pool.
The worker choice strategy.
Optional workerChoiceStrategyOptions: WorkerChoiceStrategyOptionsThe worker choice strategy options.
Sets the worker choice strategy options in this pool.
The worker choice strategy options.
Protected setupProtected workerThis function is the listener registered for each worker message.
The listener function to execute when a message is received from a worker.
This function is the listener registered for each worker message.
The listener function to execute when a message is received from a worker.
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A cluster pool with a fixed number of workers.
It is possible to perform tasks in sync or asynchronous mode as you prefer.
This pool selects the workers in a round robin fashion.
Author
Christopher Quadflieg
Since
2.0.0