-import type { MessageChannel } from 'node:worker_threads'
+import type { MessageChannel, WorkerOptions } from 'node:worker_threads'
+import type { EventEmitter } from 'node:events'
import type { CircularArray } from '../circular-array'
import type { Task } from '../utility-types'
/**
* Callback invoked when the worker has started successfully.
+ *
+ * @typeParam Worker - Type of worker.
*/
export type OnlineHandler<Worker extends IWorker> = (this: Worker) => void
/**
* Callback invoked if the worker has received a message.
+ *
+ * @typeParam Worker - Type of worker.
*/
export type MessageHandler<Worker extends IWorker> = (
this: Worker,
/**
* Callback invoked if the worker raised an error.
+ *
+ * @typeParam Worker - Type of worker.
*/
export type ErrorHandler<Worker extends IWorker> = (
this: Worker,
/**
* Callback invoked when the worker exits successfully.
+ *
+ * @typeParam Worker - Type of worker.
*/
export type ExitHandler<Worker extends IWorker> = (
this: Worker,
* Maximum number of queued tasks.
*/
readonly maxQueued?: number
+ /**
+ * Number of sequentially stolen tasks.
+ */
+ sequentiallyStolen: number
+ /**
+ * Number of stolen tasks.
+ */
+ stolen: number
/**
* Number of failed tasks.
*/
/**
* Worker type.
*/
- type: WorkerType
+ readonly type: WorkerType
/**
* Dynamic flag.
*/
* Ready flag.
*/
ready: boolean
+ /**
+ * Stealing flag.
+ * This flag is set to `true` when worker node is stealing tasks from another worker node.
+ */
+ stealing: boolean
/**
* Task function names.
*/
- taskFunctions?: string[]
+ taskFunctionNames?: string[]
}
/**
readonly elu: EventLoopUtilizationMeasurementStatistics
}
+/**
+ * Worker choice strategy data.
+ *
+ * @internal
+ */
+export interface StrategyData {
+ virtualTaskEndTimestamp?: number
+}
+
/**
* Worker interface.
*/
export interface IWorker {
/**
- * Worker id.
+ * Cluster worker id.
*/
readonly id?: number
+ /**
+ * Worker thread worker id.
+ */
readonly threadId?: number
/**
- * Registers an event listener.
+ * Registers an event handler.
*
* @param event - The event.
* @param handler - The event handler.
*/
- readonly on: ((event: 'online', handler: OnlineHandler<this>) => void) &
- ((event: 'message', handler: MessageHandler<this>) => void) &
- ((event: 'error', handler: ErrorHandler<this>) => void) &
- ((event: 'exit', handler: ExitHandler<this>) => void)
+ readonly on: (
+ event: string,
+ handler:
+ | OnlineHandler<this>
+ | MessageHandler<this>
+ | ErrorHandler<this>
+ | ExitHandler<this>
+ ) => void
/**
- * Registers a listener to the exit event that will only be performed once.
+ * Registers once an event handler.
*
- * @param event - `'exit'`.
- * @param handler - The exit handler.
+ * @param event - The event.
+ * @param handler - The event handler.
+ */
+ readonly once: (
+ event: string,
+ handler:
+ | OnlineHandler<this>
+ | MessageHandler<this>
+ | ErrorHandler<this>
+ | ExitHandler<this>
+ ) => void
+ /**
+ * Stop all JavaScript execution in the worker thread as soon as possible.
+ * Returns a Promise for the exit code that is fulfilled when the `'exit' event` is emitted.
*/
- readonly once: (event: 'exit', handler: ExitHandler<this>) => void
+ readonly terminate?: () => Promise<number>
+ /**
+ * Cluster worker disconnect.
+ */
+ readonly disconnect?: () => void
+ /**
+ * Cluster worker kill.
+ */
+ readonly kill?: (signal?: string) => void
+}
+
+/**
+ * Worker node options.
+ *
+ * @internal
+ */
+export interface WorkerNodeOptions {
+ workerOptions?: WorkerOptions
+ env?: Record<string, unknown>
+ tasksQueueBackPressureSize: number
}
/**
* @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data.
* @internal
*/
-export interface IWorkerNode<Worker extends IWorker, Data = unknown> {
+export interface IWorkerNode<Worker extends IWorker, Data = unknown>
+ extends EventEmitter {
/**
* Worker.
*/
*/
readonly info: WorkerInfo
/**
- * Message channel.
+ * Worker usage statistics.
+ */
+ readonly usage: WorkerUsage
+ /**
+ * Worker choice strategy data.
+ * This is used to store data that are specific to the worker choice strategy.
+ */
+ strategyData?: StrategyData
+ /**
+ * Message channel (worker thread only).
*/
readonly messageChannel?: MessageChannel
/**
- * Worker usage statistics.
+ * Tasks queue back pressure size.
+ * This is the number of tasks that can be enqueued before the worker node has back pressure.
*/
- usage: WorkerUsage
+ tasksQueueBackPressureSize: number
/**
* Tasks queue size.
*
* Enqueue task.
*
* @param task - The task to queue.
- * @returns The task queue size.
+ * @returns The tasks queue size.
*/
readonly enqueueTask: (task: Task<Data>) => number
+ /**
+ * Prepends a task to the tasks queue.
+ *
+ * @param task - The task to prepend.
+ * @returns The tasks queue size.
+ */
+ readonly unshiftTask: (task: Task<Data>) => number
/**
* Dequeue task.
*
* @returns The dequeued task.
*/
readonly dequeueTask: () => Task<Data> | undefined
+ /**
+ * Pops a task from the tasks queue.
+ *
+ * @returns The popped task.
+ */
+ readonly popTask: () => Task<Data> | undefined
/**
* Clears tasks queue.
*/
readonly clearTasksQueue: () => void
/**
- * Whether the worker node has back pressure.
+ * Whether the worker node has back pressure (i.e. its tasks queue is full).
*
* @returns `true` if the worker node has back pressure, `false` otherwise.
*/
readonly hasBackPressure: () => boolean
/**
- * Resets usage statistics .
+ * Resets usage statistics.
*/
readonly resetUsage: () => void
/**
- * Closes communication channel.
+ * Terminates the worker node.
*/
- readonly closeChannel: () => void
+ readonly terminate: () => Promise<void>
/**
- * Gets task worker usage statistics.
+ * Registers a worker event handler.
+ *
+ * @param event - The event.
+ * @param handler - The event handler.
*/
- readonly getTaskWorkerUsage: (name: string) => WorkerUsage | undefined
+ readonly registerWorkerEventHandler: (
+ event: string,
+ handler:
+ | OnlineHandler<Worker>
+ | MessageHandler<Worker>
+ | ErrorHandler<Worker>
+ | ExitHandler<Worker>
+ ) => void
+ /**
+ * Registers once a worker event handler.
+ *
+ * @param event - The event.
+ * @param handler - The event handler.
+ */
+ readonly registerOnceWorkerEventHandler: (
+ event: string,
+ handler:
+ | OnlineHandler<Worker>
+ | MessageHandler<Worker>
+ | ErrorHandler<Worker>
+ | ExitHandler<Worker>
+ ) => void
+ /**
+ * Gets task function worker usage statistics.
+ *
+ * @param name - The task function name.
+ * @returns The task function worker usage statistics if the task function worker usage statistics are initialized, `undefined` otherwise.
+ */
+ readonly getTaskFunctionWorkerUsage: (name: string) => WorkerUsage | undefined
+ /**
+ * Deletes task function worker usage statistics.
+ *
+ * @param name - The task function name.
+ * @returns `true` if the task function worker usage statistics were deleted, `false` otherwise.
+ */
+ readonly deleteTaskFunctionWorkerUsage: (name: string) => boolean
+}
+
+/**
+ * Worker node event detail.
+ *
+ * @internal
+ */
+export interface WorkerNodeEventDetail {
+ workerId: number
+ workerNodeKey?: number
}
repositories / poolifier.git / blobdiff