X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fworker%2Fabstract-worker.ts;h=bf81a9f2432ff81606f7c10536c6ce338f16f066;hb=9cd39dd47830f0923cd3ebf53b709bf7fb07e788;hp=fd163547a78eb08c7ca0c0a93519374530ed5c8f;hpb=729c563db85562dd7d0f7733b1a3e2d98467134b;p=poolifier.git diff --git a/src/worker/abstract-worker.ts b/src/worker/abstract-worker.ts index fd163547..bf81a9f2 100644 --- a/src/worker/abstract-worker.ts +++ b/src/worker/abstract-worker.ts @@ -1,137 +1,211 @@ -import { AsyncResource } from 'async_hooks' +import { AsyncResource } from 'node:async_hooks' +import type { Worker } from 'node:cluster' +import type { MessagePort } from 'node:worker_threads' import type { MessageValue } from '../utility-types' -import type { WorkerOptions } from './worker-options' +import { EMPTY_FUNCTION } from '../utils' +import { type KillBehavior, type WorkerOptions } from './worker-options' +import { KillBehaviors } from './worker-options' + +const DEFAULT_MAX_INACTIVE_TIME = 60000 +const DEFAULT_KILL_BEHAVIOR: KillBehavior = KillBehaviors.SOFT /** - * Base class containing some shared logic for all poolifier workers. + * 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. - * @template Response Type of response the worker sends back to the main worker. + * @typeParam MainWorker - Type of main worker. + * @typeParam Data - Type of data this worker receives from pool's execution. This can only be serializable data. + * @typeParam Response - Type of response the worker sends back to the main worker. This can only be serializable data. */ export abstract class AbstractWorker< - MainWorker, + MainWorker extends Worker | MessagePort, Data = unknown, Response = unknown > extends AsyncResource { /** - * The maximum time to keep this worker alive while idle. The pool automatically checks and terminates this worker when the time expires. + * Timestamp of the last task processed by this worker. */ - protected readonly maxInactiveTime: number + protected lastTaskTimestamp!: number /** - * Whether the worker is working asynchronously or not. + * Handler Id of the `aliveInterval` worker alive check. */ - protected readonly async: boolean + protected readonly aliveInterval?: NodeJS.Timeout /** - * Timestamp of the last task processed by this worker. + * Options for the worker. */ - protected lastTask: number - /** - * Handler ID of the `interval` alive check. - */ - protected readonly interval?: NodeJS.Timeout - + public readonly opts: WorkerOptions /** * 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 opts Options for the 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. */ public constructor ( type: string, - isMain: boolean, + protected readonly isMain: boolean, fn: (data: Data) => Response, - public readonly opts: WorkerOptions = {} + protected mainWorker: MainWorker | undefined | null, + opts: WorkerOptions = { + /** + * The kill behavior option on this Worker or its default value. + */ + killBehavior: DEFAULT_KILL_BEHAVIOR, + /** + * The maximum time to keep this worker alive while idle. + * The pool automatically checks and terminates this worker when the time expires. + */ + maxInactiveTime: DEFAULT_MAX_INACTIVE_TIME + } ) { super(type) - - this.maxInactiveTime = this.opts.maxInactiveTime ?? 1000 * 60 - this.async = !!this.opts.async - this.lastTask = Date.now() - if (!fn) throw new Error('fn parameter is mandatory') - // keep the worker active - if (!isMain) { - this.interval = setInterval( + this.opts = opts + this.checkFunctionInput(fn) + this.checkWorkerOptions(this.opts) + if (!this.isMain) { + this.lastTaskTimestamp = Date.now() + this.aliveInterval = setInterval( this.checkAlive.bind(this), - this.maxInactiveTime / 2 + (this.opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME) / 2 ) this.checkAlive.bind(this)() } + + this.mainWorker?.on('message', (value: MessageValue) => { + this.messageListener(value, fn) + }) + } + + protected messageListener ( + value: MessageValue, + fn: (data: Data) => Response + ): 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) + } + } 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 + this.aliveInterval != null && clearInterval(this.aliveInterval) + this.emitDestroy() + } + } + + private checkWorkerOptions (opts: WorkerOptions): void { + this.opts.killBehavior = opts.killBehavior ?? DEFAULT_KILL_BEHAVIOR + this.opts.maxInactiveTime = + opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME + this.opts.async = opts.async ?? false + } + + /** + * Checks if the `fn` parameter is passed to the constructor. + * + * @param fn - The function that should be defined. + */ + private checkFunctionInput (fn: (data: Data) => Response): void { + if (fn == null) throw new Error('fn parameter is mandatory') + if (typeof fn !== 'function') { + throw new TypeError('fn parameter is not a function') + } } /** * Returns the main worker. + * + * @returns Reference to the main worker. */ - protected abstract getMainWorker (): MainWorker + protected getMainWorker (): MainWorker { + if (this.mainWorker == null) { + throw new Error('Main worker was not set') + } + return this.mainWorker + } /** - * Send a message to the main worker. + * Sends a message to the main worker. * - * @param message The response message. + * @param message - The response message. */ protected abstract sendToMainWorker (message: MessageValue): void /** - * Check to see if the worker should be terminated, because its living too long. + * Checks if the worker should be terminated, because its living too long. */ protected checkAlive (): void { - if (Date.now() - this.lastTask > this.maxInactiveTime) { - this.sendToMainWorker({ kill: 1 }) + if ( + Date.now() - this.lastTaskTimestamp > + (this.opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME) + ) { + this.sendToMainWorker({ kill: this.opts.killBehavior }) } } /** - * Handle an error and convert it to a string so it can be sent back to the main worker. + * 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. + * @param e - The error raised by the worker. + * @returns Message of the error. */ protected handleError (e: Error | string): string { - return (e as unknown) as string + return e as string } /** - * Run the given function synchronously. + * 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 value - Input data for the given function. */ protected run ( fn: (data?: Data) => Response, value: MessageValue ): void { try { + const startTaskTimestamp = Date.now() const res = fn(value.data) - this.sendToMainWorker({ data: res, id: value.id }) - this.lastTask = Date.now() + const taskRunTime = Date.now() - startTaskTimestamp + this.sendToMainWorker({ data: res, id: value.id, taskRunTime }) } catch (e) { - const err = this.handleError(e) + const err = this.handleError(e as Error) this.sendToMainWorker({ error: err, id: value.id }) - this.lastTask = Date.now() + } finally { + !this.isMain && (this.lastTaskTimestamp = Date.now()) } } /** - * Run the given function asynchronously. + * 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 value - Input data for the given function. */ protected runAsync ( fn: (data?: Data) => Promise, value: MessageValue ): void { + const startTaskTimestamp = Date.now() fn(value.data) .then(res => { - this.sendToMainWorker({ data: res, id: value.id }) - this.lastTask = Date.now() + const taskRunTime = Date.now() - startTaskTimestamp + this.sendToMainWorker({ data: res, id: value.id, taskRunTime }) return null }) .catch(e => { - const err = this.handleError(e) + const err = this.handleError(e as Error) this.sendToMainWorker({ error: err, id: value.id }) - this.lastTask = Date.now() }) + .finally(() => { + !this.isMain && (this.lastTaskTimestamp = Date.now()) + }) + .catch(EMPTY_FUNCTION) } }