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be0676b3 APA |
1 | import type { |
2 | MessageValue, | |
3 | PromiseWorkerResponseWrapper | |
4 | } from '../utility-types' | |
ed6dd37f | 5 | import { EMPTY_FUNCTION } from '../utils' |
34a0cfab | 6 | import { KillBehaviors, isKillBehavior } from '../worker/worker-options' |
bdaf31cd | 7 | import type { PoolOptions } from './pool' |
b4904890 | 8 | import { PoolEmitter } from './pool' |
ffcbbad8 | 9 | import type { IPoolInternal, TasksUsage, WorkerType } from './pool-internal' |
b4904890 | 10 | import { PoolType } from './pool-internal' |
ea7a90d3 | 11 | import type { IPoolWorker } from './pool-worker' |
a35560ba S |
12 | import { |
13 | WorkerChoiceStrategies, | |
63220255 | 14 | type WorkerChoiceStrategy |
bdaf31cd JB |
15 | } from './selection-strategies/selection-strategies-types' |
16 | import { WorkerChoiceStrategyContext } from './selection-strategies/worker-choice-strategy-context' | |
c97c7edb | 17 | |
729c563d | 18 | /** |
ea7a90d3 | 19 | * Base class that implements some shared logic for all poolifier pools. |
729c563d | 20 | * |
38e795c1 JB |
21 | * @typeParam Worker - Type of worker which manages this pool. |
22 | * @typeParam Data - Type of data sent to the worker. This can only be serializable data. | |
23 | * @typeParam Response - Type of response of execution. This can only be serializable data. | |
729c563d | 24 | */ |
c97c7edb | 25 | export abstract class AbstractPool< |
ea7a90d3 | 26 | Worker extends IPoolWorker, |
d3c8a1a8 S |
27 | Data = unknown, |
28 | Response = unknown | |
9b2fdd9f | 29 | > implements IPoolInternal<Worker, Data, Response> { |
38e795c1 | 30 | /** {@inheritDoc} */ |
ffcbbad8 JB |
31 | public readonly workers: Map<number, WorkerType<Worker>> = new Map< |
32 | number, | |
33 | WorkerType<Worker> | |
bf9549ae | 34 | >() |
4a6952ff | 35 | |
38e795c1 | 36 | /** {@inheritDoc} */ |
7c0ba920 JB |
37 | public readonly emitter?: PoolEmitter |
38 | ||
ffcbbad8 JB |
39 | /** |
40 | * Id of the next worker. | |
41 | */ | |
42 | protected nextWorkerId: number = 0 | |
43 | ||
be0676b3 APA |
44 | /** |
45 | * The promise map. | |
46 | * | |
ffcbbad8 | 47 | * - `key`: This is the message id of each submitted task. |
be0676b3 APA |
48 | * - `value`: An object that contains the worker, the resolve function and the reject function. |
49 | * | |
50 | * When we receive a message from the worker we get a map entry and resolve/reject the promise based on the message. | |
51 | */ | |
52 | protected promiseMap: Map< | |
b4e75778 | 53 | string, |
78cea37e | 54 | PromiseWorkerResponseWrapper<Worker, Response> |
b4e75778 | 55 | > = new Map<string, PromiseWorkerResponseWrapper<Worker, Response>>() |
c97c7edb | 56 | |
a35560ba S |
57 | /** |
58 | * Worker choice strategy instance implementing the worker choice algorithm. | |
59 | * | |
60 | * Default to a strategy implementing a round robin algorithm. | |
61 | */ | |
62 | protected workerChoiceStrategyContext: WorkerChoiceStrategyContext< | |
78cea37e JB |
63 | Worker, |
64 | Data, | |
65 | Response | |
a35560ba S |
66 | > |
67 | ||
729c563d S |
68 | /** |
69 | * Constructs a new poolifier pool. | |
70 | * | |
38e795c1 JB |
71 | * @param numberOfWorkers - Number of workers that this pool should manage. |
72 | * @param filePath - Path to the worker-file. | |
73 | * @param opts - Options for the pool. | |
729c563d | 74 | */ |
c97c7edb | 75 | public constructor ( |
5c5a1fb7 | 76 | public readonly numberOfWorkers: number, |
c97c7edb | 77 | public readonly filePath: string, |
1927ee67 | 78 | public readonly opts: PoolOptions<Worker> |
c97c7edb | 79 | ) { |
78cea37e | 80 | if (!this.isMain()) { |
c97c7edb S |
81 | throw new Error('Cannot start a pool from a worker!') |
82 | } | |
8d3782fa | 83 | this.checkNumberOfWorkers(this.numberOfWorkers) |
c510fea7 | 84 | this.checkFilePath(this.filePath) |
7c0ba920 | 85 | this.checkPoolOptions(this.opts) |
c97c7edb S |
86 | this.setupHook() |
87 | ||
5c5a1fb7 | 88 | for (let i = 1; i <= this.numberOfWorkers; i++) { |
280c2a77 | 89 | this.createAndSetupWorker() |
c97c7edb S |
90 | } |
91 | ||
6bd72cd0 | 92 | if (this.opts.enableEvents === true) { |
7c0ba920 JB |
93 | this.emitter = new PoolEmitter() |
94 | } | |
a35560ba S |
95 | this.workerChoiceStrategyContext = new WorkerChoiceStrategyContext( |
96 | this, | |
4a6952ff JB |
97 | () => { |
98 | const workerCreated = this.createAndSetupWorker() | |
f3636726 | 99 | this.registerWorkerMessageListener(workerCreated, message => { |
4a6952ff JB |
100 | if ( |
101 | isKillBehavior(KillBehaviors.HARD, message.kill) || | |
bdaf31cd | 102 | this.getWorkerRunningTasks(workerCreated) === 0 |
4a6952ff JB |
103 | ) { |
104 | // Kill received from the worker, means that no new tasks are submitted to that worker for a while ( > maxInactiveTime) | |
a9d9ea34 | 105 | void this.destroyWorker(workerCreated) |
4a6952ff JB |
106 | } |
107 | }) | |
108 | return workerCreated | |
109 | }, | |
e843b904 | 110 | this.opts.workerChoiceStrategy |
a35560ba | 111 | ) |
c97c7edb S |
112 | } |
113 | ||
a35560ba | 114 | private checkFilePath (filePath: string): void { |
ffcbbad8 JB |
115 | if ( |
116 | filePath == null || | |
117 | (typeof filePath === 'string' && filePath.trim().length === 0) | |
118 | ) { | |
c510fea7 APA |
119 | throw new Error('Please specify a file with a worker implementation') |
120 | } | |
121 | } | |
122 | ||
8d3782fa JB |
123 | private checkNumberOfWorkers (numberOfWorkers: number): void { |
124 | if (numberOfWorkers == null) { | |
125 | throw new Error( | |
126 | 'Cannot instantiate a pool without specifying the number of workers' | |
127 | ) | |
78cea37e | 128 | } else if (!Number.isSafeInteger(numberOfWorkers)) { |
473c717a | 129 | throw new TypeError( |
8d3782fa JB |
130 | 'Cannot instantiate a pool with a non integer number of workers' |
131 | ) | |
132 | } else if (numberOfWorkers < 0) { | |
473c717a | 133 | throw new RangeError( |
8d3782fa JB |
134 | 'Cannot instantiate a pool with a negative number of workers' |
135 | ) | |
7c0ba920 | 136 | } else if (this.type === PoolType.FIXED && numberOfWorkers === 0) { |
8d3782fa JB |
137 | throw new Error('Cannot instantiate a fixed pool with no worker') |
138 | } | |
139 | } | |
140 | ||
7c0ba920 | 141 | private checkPoolOptions (opts: PoolOptions<Worker>): void { |
e843b904 JB |
142 | this.opts.workerChoiceStrategy = |
143 | opts.workerChoiceStrategy ?? WorkerChoiceStrategies.ROUND_ROBIN | |
7c0ba920 JB |
144 | this.opts.enableEvents = opts.enableEvents ?? true |
145 | } | |
146 | ||
38e795c1 | 147 | /** {@inheritDoc} */ |
7c0ba920 JB |
148 | public abstract get type (): PoolType |
149 | ||
38e795c1 | 150 | /** {@inheritDoc} */ |
7c0ba920 JB |
151 | public get numberOfRunningTasks (): number { |
152 | return this.promiseMap.size | |
a35560ba S |
153 | } |
154 | ||
ffcbbad8 | 155 | /** |
b4e75778 | 156 | * Gets the given worker key. |
ffcbbad8 JB |
157 | * |
158 | * @param worker - The worker. | |
159 | * @returns The worker key. | |
160 | */ | |
161 | private getWorkerKey (worker: Worker): number | undefined { | |
162 | return [...this.workers].find(([, value]) => value.worker === worker)?.[0] | |
bf9549ae JB |
163 | } |
164 | ||
38e795c1 | 165 | /** {@inheritDoc} */ |
bdaf31cd | 166 | public getWorkerRunningTasks (worker: Worker): number | undefined { |
ffcbbad8 JB |
167 | return this.workers.get(this.getWorkerKey(worker) as number)?.tasksUsage |
168 | ?.running | |
bdaf31cd JB |
169 | } |
170 | ||
38e795c1 | 171 | /** {@inheritDoc} */ |
bf9549ae | 172 | public getWorkerAverageTasksRunTime (worker: Worker): number | undefined { |
ffcbbad8 JB |
173 | return this.workers.get(this.getWorkerKey(worker) as number)?.tasksUsage |
174 | ?.avgRunTime | |
bdaf31cd JB |
175 | } |
176 | ||
38e795c1 | 177 | /** {@inheritDoc} */ |
a35560ba S |
178 | public setWorkerChoiceStrategy ( |
179 | workerChoiceStrategy: WorkerChoiceStrategy | |
180 | ): void { | |
b98ec2e6 | 181 | this.opts.workerChoiceStrategy = workerChoiceStrategy |
ffcbbad8 JB |
182 | for (const [key, value] of this.workers) { |
183 | this.setWorker(key, value.worker, { | |
184 | run: 0, | |
185 | running: 0, | |
186 | runTime: 0, | |
187 | avgRunTime: 0 | |
188 | }) | |
ea7a90d3 | 189 | } |
a35560ba S |
190 | this.workerChoiceStrategyContext.setWorkerChoiceStrategy( |
191 | workerChoiceStrategy | |
192 | ) | |
193 | } | |
194 | ||
38e795c1 | 195 | /** {@inheritDoc} */ |
7c0ba920 JB |
196 | public abstract get busy (): boolean |
197 | ||
198 | protected internalGetBusyStatus (): boolean { | |
199 | return ( | |
200 | this.numberOfRunningTasks >= this.numberOfWorkers && | |
bdaf31cd | 201 | this.findFreeWorker() === false |
7c0ba920 JB |
202 | ) |
203 | } | |
204 | ||
38e795c1 | 205 | /** {@inheritDoc} */ |
bdaf31cd | 206 | public findFreeWorker (): Worker | false { |
ffcbbad8 JB |
207 | for (const value of this.workers.values()) { |
208 | if (value.tasksUsage.running === 0) { | |
bdaf31cd | 209 | // A worker is free, return the matching worker |
ffcbbad8 | 210 | return value.worker |
7c0ba920 JB |
211 | } |
212 | } | |
213 | return false | |
214 | } | |
215 | ||
38e795c1 | 216 | /** {@inheritDoc} */ |
78cea37e | 217 | public async execute (data: Data): Promise<Response> { |
280c2a77 | 218 | const worker = this.chooseWorker() |
b4e75778 JB |
219 | const messageId = crypto.randomUUID() |
220 | const res = this.internalExecute(worker, messageId) | |
14916bf9 | 221 | this.checkAndEmitBusy() |
a05c10de | 222 | this.sendToWorker(worker, { |
e5a5c0fc JB |
223 | // eslint-disable-next-line @typescript-eslint/consistent-type-assertions |
224 | data: data ?? ({} as Data), | |
b4e75778 | 225 | id: messageId |
a05c10de | 226 | }) |
78cea37e | 227 | // eslint-disable-next-line @typescript-eslint/return-await |
280c2a77 S |
228 | return res |
229 | } | |
c97c7edb | 230 | |
38e795c1 | 231 | /** {@inheritDoc} */ |
c97c7edb | 232 | public async destroy (): Promise<void> { |
1fbcaa7c | 233 | await Promise.all( |
ffcbbad8 JB |
234 | [...this.workers].map(async ([, value]) => { |
235 | await this.destroyWorker(value.worker) | |
1fbcaa7c JB |
236 | }) |
237 | ) | |
c97c7edb S |
238 | } |
239 | ||
4a6952ff | 240 | /** |
675bb809 | 241 | * Shutdowns given worker. |
4a6952ff | 242 | * |
38e795c1 | 243 | * @param worker - A worker within `workers`. |
4a6952ff JB |
244 | */ |
245 | protected abstract destroyWorker (worker: Worker): void | Promise<void> | |
c97c7edb | 246 | |
729c563d | 247 | /** |
280c2a77 S |
248 | * Setup hook that can be overridden by a Poolifier pool implementation |
249 | * to run code before workers are created in the abstract constructor. | |
729c563d | 250 | */ |
280c2a77 S |
251 | protected setupHook (): void { |
252 | // Can be overridden | |
253 | } | |
c97c7edb | 254 | |
729c563d | 255 | /** |
280c2a77 S |
256 | * Should return whether the worker is the main worker or not. |
257 | */ | |
258 | protected abstract isMain (): boolean | |
259 | ||
260 | /** | |
bf9549ae JB |
261 | * Hook executed before the worker task promise resolution. |
262 | * Can be overridden. | |
729c563d | 263 | * |
38e795c1 | 264 | * @param worker - The worker. |
729c563d | 265 | */ |
bf9549ae JB |
266 | protected beforePromiseWorkerResponseHook (worker: Worker): void { |
267 | this.increaseWorkerRunningTasks(worker) | |
c97c7edb S |
268 | } |
269 | ||
c01733f1 | 270 | /** |
bf9549ae JB |
271 | * Hook executed after the worker task promise resolution. |
272 | * Can be overridden. | |
c01733f1 | 273 | * |
38e795c1 JB |
274 | * @param message - The received message. |
275 | * @param promise - The Promise response. | |
c01733f1 | 276 | */ |
bf9549ae JB |
277 | protected afterPromiseWorkerResponseHook ( |
278 | message: MessageValue<Response>, | |
279 | promise: PromiseWorkerResponseWrapper<Worker, Response> | |
280 | ): void { | |
281 | this.decreaseWorkerRunningTasks(promise.worker) | |
282 | this.stepWorkerRunTasks(promise.worker, 1) | |
283 | this.updateWorkerTasksRunTime(promise.worker, message.taskRunTime) | |
c01733f1 | 284 | } |
285 | ||
729c563d S |
286 | /** |
287 | * Removes the given worker from the pool. | |
288 | * | |
38e795c1 | 289 | * @param worker - The worker that will be removed. |
729c563d | 290 | */ |
f2fdaa86 | 291 | protected removeWorker (worker: Worker): void { |
ffcbbad8 JB |
292 | this.workers.delete(this.getWorkerKey(worker) as number) |
293 | --this.nextWorkerId | |
f2fdaa86 JB |
294 | } |
295 | ||
280c2a77 | 296 | /** |
675bb809 | 297 | * Chooses a worker for the next task. |
280c2a77 S |
298 | * |
299 | * The default implementation uses a round robin algorithm to distribute the load. | |
300 | * | |
301 | * @returns Worker. | |
302 | */ | |
303 | protected chooseWorker (): Worker { | |
a35560ba | 304 | return this.workerChoiceStrategyContext.execute() |
c97c7edb S |
305 | } |
306 | ||
280c2a77 | 307 | /** |
675bb809 | 308 | * Sends a message to the given worker. |
280c2a77 | 309 | * |
38e795c1 JB |
310 | * @param worker - The worker which should receive the message. |
311 | * @param message - The message. | |
280c2a77 S |
312 | */ |
313 | protected abstract sendToWorker ( | |
314 | worker: Worker, | |
315 | message: MessageValue<Data> | |
316 | ): void | |
317 | ||
4a6952ff | 318 | /** |
bdede008 | 319 | * Registers a listener callback on a given worker. |
4a6952ff | 320 | * |
38e795c1 JB |
321 | * @param worker - The worker which should register a listener. |
322 | * @param listener - The message listener callback. | |
4a6952ff JB |
323 | */ |
324 | protected abstract registerWorkerMessageListener< | |
4f7fa42a | 325 | Message extends Data | Response |
78cea37e | 326 | >(worker: Worker, listener: (message: MessageValue<Message>) => void): void |
c97c7edb | 327 | |
729c563d S |
328 | /** |
329 | * Returns a newly created worker. | |
330 | */ | |
280c2a77 | 331 | protected abstract createWorker (): Worker |
c97c7edb | 332 | |
729c563d S |
333 | /** |
334 | * Function that can be hooked up when a worker has been newly created and moved to the workers registry. | |
335 | * | |
38e795c1 | 336 | * Can be used to update the `maxListeners` or binding the `main-worker`\<-\>`worker` connection if not bind by default. |
729c563d | 337 | * |
38e795c1 | 338 | * @param worker - The newly created worker. |
729c563d | 339 | */ |
280c2a77 | 340 | protected abstract afterWorkerSetup (worker: Worker): void |
c97c7edb | 341 | |
4a6952ff JB |
342 | /** |
343 | * Creates a new worker for this pool and sets it up completely. | |
344 | * | |
345 | * @returns New, completely set up worker. | |
346 | */ | |
347 | protected createAndSetupWorker (): Worker { | |
bdacc2d2 | 348 | const worker = this.createWorker() |
280c2a77 | 349 | |
35cf1c03 | 350 | worker.on('message', this.opts.messageHandler ?? EMPTY_FUNCTION) |
a35560ba S |
351 | worker.on('error', this.opts.errorHandler ?? EMPTY_FUNCTION) |
352 | worker.on('online', this.opts.onlineHandler ?? EMPTY_FUNCTION) | |
353 | worker.on('exit', this.opts.exitHandler ?? EMPTY_FUNCTION) | |
a974afa6 JB |
354 | worker.once('exit', () => { |
355 | this.removeWorker(worker) | |
356 | }) | |
280c2a77 | 357 | |
ffcbbad8 JB |
358 | this.setWorker(this.nextWorkerId, worker, { |
359 | run: 0, | |
360 | running: 0, | |
361 | runTime: 0, | |
362 | avgRunTime: 0 | |
363 | }) | |
364 | ++this.nextWorkerId | |
280c2a77 S |
365 | |
366 | this.afterWorkerSetup(worker) | |
367 | ||
c97c7edb S |
368 | return worker |
369 | } | |
be0676b3 APA |
370 | |
371 | /** | |
372 | * This function is the listener registered for each worker. | |
373 | * | |
bdacc2d2 | 374 | * @returns The listener function to execute when a message is received from a worker. |
be0676b3 APA |
375 | */ |
376 | protected workerListener (): (message: MessageValue<Response>) => void { | |
4a6952ff | 377 | return message => { |
bdacc2d2 JB |
378 | if (message.id !== undefined) { |
379 | const promise = this.promiseMap.get(message.id) | |
380 | if (promise !== undefined) { | |
78cea37e | 381 | if (message.error != null) { |
a05c10de JB |
382 | promise.reject(message.error) |
383 | } else { | |
384 | promise.resolve(message.data as Response) | |
385 | } | |
bf9549ae | 386 | this.afterPromiseWorkerResponseHook(message, promise) |
be0676b3 APA |
387 | this.promiseMap.delete(message.id) |
388 | } | |
389 | } | |
390 | } | |
be0676b3 | 391 | } |
7c0ba920 | 392 | |
78cea37e JB |
393 | private async internalExecute ( |
394 | worker: Worker, | |
b4e75778 | 395 | messageId: string |
78cea37e JB |
396 | ): Promise<Response> { |
397 | this.beforePromiseWorkerResponseHook(worker) | |
398 | return await new Promise<Response>((resolve, reject) => { | |
399 | this.promiseMap.set(messageId, { resolve, reject, worker }) | |
400 | }) | |
401 | } | |
402 | ||
7c0ba920 | 403 | private checkAndEmitBusy (): void { |
78cea37e | 404 | if (this.opts.enableEvents === true && this.busy) { |
7c0ba920 JB |
405 | this.emitter?.emit('busy') |
406 | } | |
407 | } | |
bf9549ae JB |
408 | |
409 | /** | |
10fcfaf4 | 410 | * Increases the number of tasks that the given worker has applied. |
bf9549ae | 411 | * |
38e795c1 | 412 | * @param worker - Worker which running tasks is increased. |
bf9549ae JB |
413 | */ |
414 | private increaseWorkerRunningTasks (worker: Worker): void { | |
415 | this.stepWorkerRunningTasks(worker, 1) | |
416 | } | |
417 | ||
418 | /** | |
10fcfaf4 | 419 | * Decreases the number of tasks that the given worker has applied. |
bf9549ae | 420 | * |
38e795c1 | 421 | * @param worker - Worker which running tasks is decreased. |
bf9549ae JB |
422 | */ |
423 | private decreaseWorkerRunningTasks (worker: Worker): void { | |
424 | this.stepWorkerRunningTasks(worker, -1) | |
425 | } | |
426 | ||
ffcbbad8 | 427 | /** |
b4e75778 | 428 | * Gets tasks usage of the given worker. |
ffcbbad8 JB |
429 | * |
430 | * @param worker - Worker which tasks usage is returned. | |
431 | */ | |
432 | private getWorkerTasksUsage (worker: Worker): TasksUsage | undefined { | |
433 | if (this.checkWorker(worker)) { | |
434 | const workerKey = this.getWorkerKey(worker) as number | |
435 | const workerEntry = this.workers.get(workerKey) as WorkerType<Worker> | |
436 | return workerEntry.tasksUsage | |
437 | } | |
438 | } | |
439 | ||
bf9549ae | 440 | /** |
10fcfaf4 | 441 | * Steps the number of tasks that the given worker has applied. |
bf9549ae | 442 | * |
38e795c1 JB |
443 | * @param worker - Worker which running tasks are stepped. |
444 | * @param step - Number of running tasks step. | |
bf9549ae JB |
445 | */ |
446 | private stepWorkerRunningTasks (worker: Worker, step: number): void { | |
ffcbbad8 JB |
447 | // prettier-ignore |
448 | (this.getWorkerTasksUsage(worker) as TasksUsage).running += step | |
bf9549ae JB |
449 | } |
450 | ||
451 | /** | |
10fcfaf4 | 452 | * Steps the number of tasks that the given worker has run. |
bf9549ae | 453 | * |
38e795c1 JB |
454 | * @param worker - Worker which has run tasks. |
455 | * @param step - Number of run tasks step. | |
bf9549ae | 456 | */ |
10fcfaf4 | 457 | private stepWorkerRunTasks (worker: Worker, step: number): void { |
ffcbbad8 JB |
458 | // prettier-ignore |
459 | (this.getWorkerTasksUsage(worker) as TasksUsage).run += step | |
bf9549ae JB |
460 | } |
461 | ||
462 | /** | |
23135a89 | 463 | * Updates tasks runtime for the given worker. |
bf9549ae | 464 | * |
38e795c1 JB |
465 | * @param worker - Worker which run the task. |
466 | * @param taskRunTime - Worker task runtime. | |
bf9549ae JB |
467 | */ |
468 | private updateWorkerTasksRunTime ( | |
469 | worker: Worker, | |
470 | taskRunTime: number | undefined | |
10fcfaf4 JB |
471 | ): void { |
472 | if ( | |
473 | this.workerChoiceStrategyContext.getWorkerChoiceStrategy() | |
ffcbbad8 | 474 | .requiredStatistics.runTime |
10fcfaf4 | 475 | ) { |
ffcbbad8 JB |
476 | const workerTasksUsage = this.getWorkerTasksUsage(worker) as TasksUsage |
477 | workerTasksUsage.runTime += taskRunTime ?? 0 | |
478 | if (workerTasksUsage.run !== 0) { | |
479 | workerTasksUsage.avgRunTime = | |
480 | workerTasksUsage.runTime / workerTasksUsage.run | |
10fcfaf4 | 481 | } |
a05c10de JB |
482 | } |
483 | } | |
484 | ||
485 | /** | |
ffcbbad8 | 486 | * Sets the given worker. |
ea7a90d3 | 487 | * |
ffcbbad8 | 488 | * @param workerKey - The worker key. |
38e795c1 | 489 | * @param worker - The worker. |
ffcbbad8 | 490 | * @param tasksUsage - The worker tasks usage. |
ea7a90d3 | 491 | */ |
ffcbbad8 JB |
492 | private setWorker ( |
493 | workerKey: number, | |
494 | worker: Worker, | |
495 | tasksUsage: TasksUsage | |
496 | ): void { | |
497 | this.workers.set(workerKey, { | |
498 | worker, | |
499 | tasksUsage | |
ea7a90d3 JB |
500 | }) |
501 | } | |
502 | ||
bf9549ae | 503 | /** |
ffcbbad8 | 504 | * Checks if the given worker is registered in the pool. |
ea7a90d3 | 505 | * |
ffcbbad8 JB |
506 | * @param worker - Worker to check. |
507 | * @returns `true` if the worker is registered in the pool. | |
ea7a90d3 | 508 | */ |
ffcbbad8 JB |
509 | private checkWorker (worker: Worker): boolean { |
510 | if (this.getWorkerKey(worker) == null) { | |
511 | throw new Error('Worker could not be found in the pool') | |
512 | } | |
513 | return true | |
ea7a90d3 | 514 | } |
c97c7edb | 515 | } |