X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fworker%2Fabstract-worker.ts;h=7d81a88ccc816803bcdcdae4f89cb9dd56486f51;hb=49d1b48ce81c9f195830a1a886657de6f2de4ca4;hp=c3c5d1bda82894265565f83bf662cc1618013edd;hpb=a05c10de598321c3ad8005f32b1cd082ec1500f5;p=poolifier.git diff --git a/src/worker/abstract-worker.ts b/src/worker/abstract-worker.ts index c3c5d1bd..7d81a88c 100644 --- a/src/worker/abstract-worker.ts +++ b/src/worker/abstract-worker.ts @@ -1,55 +1,80 @@ -import { AsyncResource } from 'async_hooks' -import type { Worker } from 'cluster' -import type { MessagePort } from 'worker_threads' -import type { MessageValue } from '../utility-types' -import { EMPTY_FUNCTION } from '../utils' -import type { KillBehavior, WorkerOptions } from './worker-options' -import { KillBehaviors } from './worker-options' +import { AsyncResource } from 'node:async_hooks' +import type { Worker } from 'node:cluster' +import type { MessagePort } from 'node:worker_threads' +import { performance } from 'node:perf_hooks' +import type { + MessageValue, + TaskPerformance, + WorkerStatistics +} from '../utility-types' +import { EMPTY_FUNCTION, isAsyncFunction, isPlainObject } from '../utils' +import { + type KillBehavior, + KillBehaviors, + type WorkerOptions +} from './worker-options' +import type { + TaskFunctions, + WorkerAsyncFunction, + WorkerFunction, + WorkerSyncFunction +} from './worker-functions' +const DEFAULT_FUNCTION_NAME = 'default' const DEFAULT_MAX_INACTIVE_TIME = 60000 const DEFAULT_KILL_BEHAVIOR: KillBehavior = KillBehaviors.SOFT /** * Base class that implements some shared logic for all poolifier workers. * - * @template MainWorker Type of main worker. - * @template Data Type of data this worker receives from pool's execution. This can only be serializable data. - * @template Response Type of response the worker sends back to the main worker. This can only be serializable data. + * @typeParam MainWorker - Type of main worker. + * @typeParam Data - Type of data this worker receives from pool's execution. This can only be structured-cloneable data. + * @typeParam Response - Type of response the worker sends back to the main worker. This can only be structured-cloneable data. */ export abstract class AbstractWorker< MainWorker extends Worker | MessagePort, Data = unknown, Response = unknown > extends AsyncResource { + /** + * Worker id. + */ + protected abstract id: number + /** + * Task function(s) processed by the worker when the pool's `execution` function is invoked. + */ + protected taskFunctions!: Map> /** * Timestamp of the last task processed by this worker. */ - protected lastTaskTimestamp: number + protected lastTaskTimestamp!: number /** - * Handler Id of the `aliveInterval` worker alive check. + * Performance statistics computation requirements. */ - protected readonly aliveInterval?: NodeJS.Timeout + protected statistics!: WorkerStatistics /** - * Options for the worker. + * Handler id of the `aliveInterval` worker alive check. */ - public readonly opts: WorkerOptions + protected readonly aliveInterval?: NodeJS.Timeout /** * Constructs a new poolifier worker. * - * @param type The type of async event. - * @param isMain Whether this is the main worker or not. - * @param fn Function processed by the worker when the pool's `execution` function is invoked. - * @param mainWorker Reference to main worker. - * @param opts Options for the worker. + * @param type - The type of async event. + * @param isMain - Whether this is the main worker or not. + * @param taskFunctions - Task function(s) processed by the worker when the pool's `execution` function is invoked. The first function is the default function. + * @param mainWorker - Reference to main worker. + * @param opts - Options for the worker. */ public constructor ( type: string, - isMain: boolean, - fn: (data: Data) => Response, - protected mainWorker: MainWorker | undefined | null, - opts: WorkerOptions = { + protected readonly isMain: boolean, + taskFunctions: + | WorkerFunction + | TaskFunctions, + protected readonly mainWorker: MainWorker, + protected readonly opts: WorkerOptions = { /** - * The kill behavior option on this Worker or its default value. + * The kill behavior option on this worker or its default value. */ killBehavior: DEFAULT_KILL_BEHAVIOR, /** @@ -60,63 +85,88 @@ export abstract class AbstractWorker< } ) { super(type) - this.opts = opts - this.checkFunctionInput(fn) this.checkWorkerOptions(this.opts) - this.lastTaskTimestamp = Date.now() - // Keep the worker active - if (isMain === false) { + this.checkTaskFunctions(taskFunctions) + if (!this.isMain) { + this.lastTaskTimestamp = performance.now() this.aliveInterval = setInterval( this.checkAlive.bind(this), (this.opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME) / 2 ) this.checkAlive.bind(this)() + this.mainWorker?.on('message', this.messageListener.bind(this)) } + } - this.mainWorker?.on('message', (value: MessageValue) => { - this.messageListener(value, fn) - }) + private checkWorkerOptions (opts: WorkerOptions): void { + this.opts.killBehavior = opts.killBehavior ?? DEFAULT_KILL_BEHAVIOR + this.opts.maxInactiveTime = + opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME + delete this.opts.async } - protected messageListener ( - value: MessageValue, - fn: (data: Data) => Response + /** + * Checks if the `taskFunctions` parameter is passed to the constructor. + * + * @param taskFunctions - The task function(s) parameter that should be checked. + */ + private checkTaskFunctions ( + taskFunctions: + | WorkerFunction + | TaskFunctions ): void { - if (value.data !== undefined && value.id !== undefined) { - // Here you will receive messages - if (this.opts.async === true) { - this.runInAsyncScope(this.runAsync.bind(this), this, fn, value) - } else { - this.runInAsyncScope(this.run.bind(this), this, fn, value) + if (taskFunctions == null) { + throw new Error('taskFunctions parameter is mandatory') + } + this.taskFunctions = new Map>() + if (typeof taskFunctions === 'function') { + this.taskFunctions.set(DEFAULT_FUNCTION_NAME, taskFunctions.bind(this)) + } else if (isPlainObject(taskFunctions)) { + let firstEntry = true + for (const [name, fn] of Object.entries(taskFunctions)) { + if (typeof fn !== 'function') { + throw new TypeError( + 'A taskFunctions parameter object value is not a function' + ) + } + this.taskFunctions.set(name, fn.bind(this)) + if (firstEntry) { + this.taskFunctions.set(DEFAULT_FUNCTION_NAME, fn.bind(this)) + firstEntry = false + } } - } else if (value.parent !== undefined) { - // Save a reference of the main worker to communicate with it - // This will be received once - this.mainWorker = value.parent - } else if (value.kill !== undefined) { - // Here is time to kill this worker, just clearing the interval - if (this.aliveInterval) clearInterval(this.aliveInterval) - this.emitDestroy() + if (firstEntry) { + throw new Error('taskFunctions parameter object is empty') + } + } else { + throw new TypeError( + 'taskFunctions parameter is not a function or a plain object' + ) } } - private checkWorkerOptions (opts: WorkerOptions) { - this.opts.killBehavior = opts.killBehavior ?? DEFAULT_KILL_BEHAVIOR - this.opts.maxInactiveTime = - opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME - /** - * Whether the worker is working asynchronously or not. - */ - this.opts.async = !!opts.async - } - /** - * Checks if the `fn` parameter is passed to the constructor. + * Worker message listener. * - * @param fn The function that should be defined. + * @param message - Message received. */ - private checkFunctionInput (fn: (data: Data) => Response): void { - if (!fn) throw new Error('fn parameter is mandatory') + protected messageListener (message: MessageValue): void { + if (message.id != null && message.data != null) { + // Task message received + const fn = this.getTaskFunction(message.name) + if (isAsyncFunction(fn)) { + this.runInAsyncScope(this.runAsync.bind(this), this, fn, message) + } else { + this.runInAsyncScope(this.runSync.bind(this), this, fn, message) + } + } else if (message.statistics != null) { + // Statistics message received + this.statistics = message.statistics + } else if (message.kill != null) { + // Kill message received + this.aliveInterval != null && clearInterval(this.aliveInterval) + this.emitDestroy() + } } /** @@ -125,8 +175,8 @@ export abstract class AbstractWorker< * @returns Reference to the main worker. */ protected getMainWorker (): MainWorker { - if (!this.mainWorker) { - throw new Error('Main worker was not set') + if (this.mainWorker == null) { + throw new Error('Main worker not set') } return this.mainWorker } @@ -134,16 +184,18 @@ export abstract class AbstractWorker< /** * Sends a message to the main worker. * - * @param message The response message. + * @param message - The response message. */ - protected abstract sendToMainWorker (message: MessageValue): void + protected abstract sendToMainWorker ( + message: MessageValue + ): void /** * Checks if the worker should be terminated, because its living too long. */ protected checkAlive (): void { if ( - Date.now() - this.lastTaskTimestamp > + performance.now() - this.lastTaskTimestamp > (this.opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME) ) { this.sendToMainWorker({ kill: this.opts.killBehavior }) @@ -153,60 +205,127 @@ export abstract class AbstractWorker< /** * Handles an error and convert it to a string so it can be sent back to the main worker. * - * @param e The error raised by the worker. - * @returns Message of the error. + * @param e - The error raised by the worker. + * @returns The error message. */ protected handleError (e: Error | string): string { - return e as string + return e instanceof Error ? e.message : e } /** * Runs the given function synchronously. * - * @param fn Function that will be executed. - * @param value Input data for the given function. + * @param fn - Function that will be executed. + * @param message - Input data for the given function. */ - protected run ( - fn: (data?: Data) => Response, - value: MessageValue + protected runSync ( + fn: WorkerSyncFunction, + message: MessageValue ): void { try { - const startTaskTimestamp = Date.now() - const res = fn(value.data) - const taskRunTime = Date.now() - startTaskTimestamp - this.sendToMainWorker({ data: res, id: value.id, taskRunTime }) + let taskPerformance = this.beginTaskPerformance() + const res = fn(message.data) + taskPerformance = this.endTaskPerformance(taskPerformance) + this.sendToMainWorker({ + data: res, + taskPerformance, + workerId: this.id, + id: message.id + }) } catch (e) { - const err = this.handleError(e as Error) - this.sendToMainWorker({ error: err, id: value.id }) + const errorMessage = this.handleError(e as Error | string) + this.sendToMainWorker({ + taskError: { + workerId: this.id, + message: errorMessage, + data: message.data + }, + id: message.id + }) } finally { - this.lastTaskTimestamp = Date.now() + !this.isMain && (this.lastTaskTimestamp = performance.now()) } } /** * Runs the given function asynchronously. * - * @param fn Function that will be executed. - * @param value Input data for the given function. + * @param fn - Function that will be executed. + * @param message - Input data for the given function. */ protected runAsync ( - fn: (data?: Data) => Promise, - value: MessageValue + fn: WorkerAsyncFunction, + message: MessageValue ): void { - const startTaskTimestamp = Date.now() - fn(value.data) + let taskPerformance = this.beginTaskPerformance() + fn(message.data) .then(res => { - const taskRunTime = Date.now() - startTaskTimestamp - this.sendToMainWorker({ data: res, id: value.id, taskRunTime }) + taskPerformance = this.endTaskPerformance(taskPerformance) + this.sendToMainWorker({ + data: res, + taskPerformance, + workerId: this.id, + id: message.id + }) return null }) .catch(e => { - const err = this.handleError(e as Error) - this.sendToMainWorker({ error: err, id: value.id }) + const errorMessage = this.handleError(e as Error | string) + this.sendToMainWorker({ + taskError: { + workerId: this.id, + message: errorMessage, + data: message.data + }, + id: message.id + }) }) .finally(() => { - this.lastTaskTimestamp = Date.now() + !this.isMain && (this.lastTaskTimestamp = performance.now()) }) .catch(EMPTY_FUNCTION) } + + /** + * Gets the task function in the given scope. + * + * @param name - Name of the function that will be returned. + */ + private getTaskFunction (name?: string): WorkerFunction { + name = name ?? DEFAULT_FUNCTION_NAME + const fn = this.taskFunctions.get(name) + if (fn == null) { + throw new Error(`Task function '${name}' not found`) + } + return fn + } + + private beginTaskPerformance (): TaskPerformance { + this.checkStatistics() + return { + timestamp: performance.now(), + ...(this.statistics.elu && { elu: performance.eventLoopUtilization() }) + } + } + + private endTaskPerformance ( + taskPerformance: TaskPerformance + ): TaskPerformance { + this.checkStatistics() + return { + ...taskPerformance, + ...(this.statistics.runTime && { + runTime: performance.now() - taskPerformance.timestamp + }), + ...(this.statistics.elu && { + elu: performance.eventLoopUtilization(taskPerformance.elu) + }) + } + } + + private checkStatistics (): void { + if (this.statistics == null) { + throw new Error('Performance statistics computation requirements not set') + } + } }