Commit | Line | Data |
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fc3e6586 | 1 | import crypto from 'node:crypto' |
62c15a68 | 2 | import { performance } from 'node:perf_hooks' |
2740a743 | 3 | import type { MessageValue, PromiseResponseWrapper } from '../utility-types' |
bbeadd16 JB |
4 | import { |
5 | DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS, | |
6 | EMPTY_FUNCTION, | |
0d80593b | 7 | isPlainObject, |
bbeadd16 JB |
8 | median |
9 | } from '../utils' | |
34a0cfab | 10 | import { KillBehaviors, isKillBehavior } from '../worker/worker-options' |
65d7a1c9 | 11 | import { CircularArray } from '../circular-array' |
29ee7e9a | 12 | import { Queue } from '../queue' |
c4855468 | 13 | import { |
65d7a1c9 | 14 | type IPool, |
7c5a1080 | 15 | PoolEmitter, |
c4855468 | 16 | PoolEvents, |
6b27d407 | 17 | type PoolInfo, |
c4855468 | 18 | type PoolOptions, |
6b27d407 JB |
19 | type PoolType, |
20 | PoolTypes, | |
184855e6 JB |
21 | type TasksQueueOptions, |
22 | type WorkerType | |
c4855468 | 23 | } from './pool' |
a4e07f72 | 24 | import type { IWorker, Task, WorkerNode, WorkerUsage } from './worker' |
a35560ba S |
25 | import { |
26 | WorkerChoiceStrategies, | |
a20f0ba5 JB |
27 | type WorkerChoiceStrategy, |
28 | type WorkerChoiceStrategyOptions | |
bdaf31cd JB |
29 | } from './selection-strategies/selection-strategies-types' |
30 | import { WorkerChoiceStrategyContext } from './selection-strategies/worker-choice-strategy-context' | |
c97c7edb | 31 | |
729c563d | 32 | /** |
ea7a90d3 | 33 | * Base class that implements some shared logic for all poolifier pools. |
729c563d | 34 | * |
38e795c1 JB |
35 | * @typeParam Worker - Type of worker which manages this pool. |
36 | * @typeParam Data - Type of data sent to the worker. This can only be serializable data. | |
02706357 | 37 | * @typeParam Response - Type of execution response. This can only be serializable data. |
729c563d | 38 | */ |
c97c7edb | 39 | export abstract class AbstractPool< |
f06e48d8 | 40 | Worker extends IWorker, |
d3c8a1a8 S |
41 | Data = unknown, |
42 | Response = unknown | |
c4855468 | 43 | > implements IPool<Worker, Data, Response> { |
afc003b2 | 44 | /** @inheritDoc */ |
f06e48d8 | 45 | public readonly workerNodes: Array<WorkerNode<Worker, Data>> = [] |
4a6952ff | 46 | |
afc003b2 | 47 | /** @inheritDoc */ |
7c0ba920 JB |
48 | public readonly emitter?: PoolEmitter |
49 | ||
be0676b3 | 50 | /** |
a3445496 | 51 | * The execution response promise map. |
be0676b3 | 52 | * |
2740a743 | 53 | * - `key`: The message id of each submitted task. |
a3445496 | 54 | * - `value`: An object that contains the worker, the execution response promise resolve and reject callbacks. |
be0676b3 | 55 | * |
a3445496 | 56 | * When we receive a message from the worker, we get a map entry with the promise resolve/reject bound to the message id. |
be0676b3 | 57 | */ |
c923ce56 JB |
58 | protected promiseResponseMap: Map< |
59 | string, | |
60 | PromiseResponseWrapper<Worker, Response> | |
61 | > = new Map<string, PromiseResponseWrapper<Worker, Response>>() | |
c97c7edb | 62 | |
a35560ba | 63 | /** |
51fe3d3c | 64 | * Worker choice strategy context referencing a worker choice algorithm implementation. |
a35560ba | 65 | * |
51fe3d3c | 66 | * Default to a round robin algorithm. |
a35560ba S |
67 | */ |
68 | protected workerChoiceStrategyContext: WorkerChoiceStrategyContext< | |
78cea37e JB |
69 | Worker, |
70 | Data, | |
71 | Response | |
a35560ba S |
72 | > |
73 | ||
729c563d S |
74 | /** |
75 | * Constructs a new poolifier pool. | |
76 | * | |
38e795c1 | 77 | * @param numberOfWorkers - Number of workers that this pool should manage. |
029715f0 | 78 | * @param filePath - Path to the worker file. |
38e795c1 | 79 | * @param opts - Options for the pool. |
729c563d | 80 | */ |
c97c7edb | 81 | public constructor ( |
b4213b7f JB |
82 | protected readonly numberOfWorkers: number, |
83 | protected readonly filePath: string, | |
84 | protected readonly opts: PoolOptions<Worker> | |
c97c7edb | 85 | ) { |
78cea37e | 86 | if (!this.isMain()) { |
c97c7edb S |
87 | throw new Error('Cannot start a pool from a worker!') |
88 | } | |
8d3782fa | 89 | this.checkNumberOfWorkers(this.numberOfWorkers) |
c510fea7 | 90 | this.checkFilePath(this.filePath) |
7c0ba920 | 91 | this.checkPoolOptions(this.opts) |
1086026a | 92 | |
7254e419 JB |
93 | this.chooseWorkerNode = this.chooseWorkerNode.bind(this) |
94 | this.executeTask = this.executeTask.bind(this) | |
95 | this.enqueueTask = this.enqueueTask.bind(this) | |
96 | this.checkAndEmitEvents = this.checkAndEmitEvents.bind(this) | |
1086026a | 97 | |
6bd72cd0 | 98 | if (this.opts.enableEvents === true) { |
7c0ba920 JB |
99 | this.emitter = new PoolEmitter() |
100 | } | |
d59df138 JB |
101 | this.workerChoiceStrategyContext = new WorkerChoiceStrategyContext< |
102 | Worker, | |
103 | Data, | |
104 | Response | |
da309861 JB |
105 | >( |
106 | this, | |
107 | this.opts.workerChoiceStrategy, | |
108 | this.opts.workerChoiceStrategyOptions | |
109 | ) | |
b6b32453 JB |
110 | |
111 | this.setupHook() | |
112 | ||
113 | for (let i = 1; i <= this.numberOfWorkers; i++) { | |
114 | this.createAndSetupWorker() | |
115 | } | |
c97c7edb S |
116 | } |
117 | ||
a35560ba | 118 | private checkFilePath (filePath: string): void { |
ffcbbad8 JB |
119 | if ( |
120 | filePath == null || | |
121 | (typeof filePath === 'string' && filePath.trim().length === 0) | |
122 | ) { | |
c510fea7 APA |
123 | throw new Error('Please specify a file with a worker implementation') |
124 | } | |
125 | } | |
126 | ||
8d3782fa JB |
127 | private checkNumberOfWorkers (numberOfWorkers: number): void { |
128 | if (numberOfWorkers == null) { | |
129 | throw new Error( | |
130 | 'Cannot instantiate a pool without specifying the number of workers' | |
131 | ) | |
78cea37e | 132 | } else if (!Number.isSafeInteger(numberOfWorkers)) { |
473c717a | 133 | throw new TypeError( |
0d80593b | 134 | 'Cannot instantiate a pool with a non safe integer number of workers' |
8d3782fa JB |
135 | ) |
136 | } else if (numberOfWorkers < 0) { | |
473c717a | 137 | throw new RangeError( |
8d3782fa JB |
138 | 'Cannot instantiate a pool with a negative number of workers' |
139 | ) | |
6b27d407 | 140 | } else if (this.type === PoolTypes.fixed && numberOfWorkers === 0) { |
8d3782fa JB |
141 | throw new Error('Cannot instantiate a fixed pool with no worker') |
142 | } | |
143 | } | |
144 | ||
7c0ba920 | 145 | private checkPoolOptions (opts: PoolOptions<Worker>): void { |
0d80593b JB |
146 | if (isPlainObject(opts)) { |
147 | this.opts.workerChoiceStrategy = | |
148 | opts.workerChoiceStrategy ?? WorkerChoiceStrategies.ROUND_ROBIN | |
149 | this.checkValidWorkerChoiceStrategy(this.opts.workerChoiceStrategy) | |
150 | this.opts.workerChoiceStrategyOptions = | |
151 | opts.workerChoiceStrategyOptions ?? | |
152 | DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS | |
49be33fe JB |
153 | this.checkValidWorkerChoiceStrategyOptions( |
154 | this.opts.workerChoiceStrategyOptions | |
155 | ) | |
1f68cede | 156 | this.opts.restartWorkerOnError = opts.restartWorkerOnError ?? true |
0d80593b JB |
157 | this.opts.enableEvents = opts.enableEvents ?? true |
158 | this.opts.enableTasksQueue = opts.enableTasksQueue ?? false | |
159 | if (this.opts.enableTasksQueue) { | |
160 | this.checkValidTasksQueueOptions( | |
161 | opts.tasksQueueOptions as TasksQueueOptions | |
162 | ) | |
163 | this.opts.tasksQueueOptions = this.buildTasksQueueOptions( | |
164 | opts.tasksQueueOptions as TasksQueueOptions | |
165 | ) | |
166 | } | |
167 | } else { | |
168 | throw new TypeError('Invalid pool options: must be a plain object') | |
7171d33f | 169 | } |
aee46736 JB |
170 | } |
171 | ||
172 | private checkValidWorkerChoiceStrategy ( | |
173 | workerChoiceStrategy: WorkerChoiceStrategy | |
174 | ): void { | |
175 | if (!Object.values(WorkerChoiceStrategies).includes(workerChoiceStrategy)) { | |
b529c323 | 176 | throw new Error( |
aee46736 | 177 | `Invalid worker choice strategy '${workerChoiceStrategy}'` |
b529c323 JB |
178 | ) |
179 | } | |
7c0ba920 JB |
180 | } |
181 | ||
0d80593b JB |
182 | private checkValidWorkerChoiceStrategyOptions ( |
183 | workerChoiceStrategyOptions: WorkerChoiceStrategyOptions | |
184 | ): void { | |
185 | if (!isPlainObject(workerChoiceStrategyOptions)) { | |
186 | throw new TypeError( | |
187 | 'Invalid worker choice strategy options: must be a plain object' | |
188 | ) | |
189 | } | |
49be33fe JB |
190 | if ( |
191 | workerChoiceStrategyOptions.weights != null && | |
6b27d407 | 192 | Object.keys(workerChoiceStrategyOptions.weights).length !== this.maxSize |
49be33fe JB |
193 | ) { |
194 | throw new Error( | |
195 | 'Invalid worker choice strategy options: must have a weight for each worker node' | |
196 | ) | |
197 | } | |
0d80593b JB |
198 | } |
199 | ||
a20f0ba5 JB |
200 | private checkValidTasksQueueOptions ( |
201 | tasksQueueOptions: TasksQueueOptions | |
202 | ): void { | |
0d80593b JB |
203 | if (tasksQueueOptions != null && !isPlainObject(tasksQueueOptions)) { |
204 | throw new TypeError('Invalid tasks queue options: must be a plain object') | |
205 | } | |
a20f0ba5 JB |
206 | if ((tasksQueueOptions?.concurrency as number) <= 0) { |
207 | throw new Error( | |
208 | `Invalid worker tasks concurrency '${ | |
209 | tasksQueueOptions.concurrency as number | |
210 | }'` | |
211 | ) | |
212 | } | |
213 | } | |
214 | ||
08f3f44c | 215 | /** @inheritDoc */ |
6b27d407 JB |
216 | public get info (): PoolInfo { |
217 | return { | |
218 | type: this.type, | |
184855e6 | 219 | worker: this.worker, |
6b27d407 JB |
220 | minSize: this.minSize, |
221 | maxSize: this.maxSize, | |
222 | workerNodes: this.workerNodes.length, | |
223 | idleWorkerNodes: this.workerNodes.reduce( | |
224 | (accumulator, workerNode) => | |
a4e07f72 JB |
225 | workerNode.workerUsage.tasks.executing === 0 |
226 | ? accumulator + 1 | |
227 | : accumulator, | |
6b27d407 JB |
228 | 0 |
229 | ), | |
230 | busyWorkerNodes: this.workerNodes.reduce( | |
231 | (accumulator, workerNode) => | |
a4e07f72 JB |
232 | workerNode.workerUsage.tasks.executing > 0 |
233 | ? accumulator + 1 | |
234 | : accumulator, | |
6b27d407 JB |
235 | 0 |
236 | ), | |
a4e07f72 | 237 | executedTasks: this.workerNodes.reduce( |
6b27d407 | 238 | (accumulator, workerNode) => |
a4e07f72 JB |
239 | accumulator + workerNode.workerUsage.tasks.executed, |
240 | 0 | |
241 | ), | |
242 | executingTasks: this.workerNodes.reduce( | |
243 | (accumulator, workerNode) => | |
244 | accumulator + workerNode.workerUsage.tasks.executing, | |
6b27d407 JB |
245 | 0 |
246 | ), | |
247 | queuedTasks: this.workerNodes.reduce( | |
248 | (accumulator, workerNode) => accumulator + workerNode.tasksQueue.size, | |
249 | 0 | |
250 | ), | |
251 | maxQueuedTasks: this.workerNodes.reduce( | |
252 | (accumulator, workerNode) => | |
253 | accumulator + workerNode.tasksQueue.maxSize, | |
254 | 0 | |
a4e07f72 JB |
255 | ), |
256 | failedTasks: this.workerNodes.reduce( | |
257 | (accumulator, workerNode) => | |
258 | accumulator + workerNode.workerUsage.tasks.failed, | |
259 | 0 | |
6b27d407 JB |
260 | ) |
261 | } | |
262 | } | |
08f3f44c | 263 | |
8881ae32 JB |
264 | /** |
265 | * Pool type. | |
266 | * | |
267 | * If it is `'dynamic'`, it provides the `max` property. | |
268 | */ | |
269 | protected abstract get type (): PoolType | |
270 | ||
184855e6 JB |
271 | /** |
272 | * Gets the worker type. | |
273 | */ | |
274 | protected abstract get worker (): WorkerType | |
275 | ||
c2ade475 | 276 | /** |
6b27d407 | 277 | * Pool minimum size. |
c2ade475 | 278 | */ |
6b27d407 | 279 | protected abstract get minSize (): number |
ff733df7 JB |
280 | |
281 | /** | |
6b27d407 | 282 | * Pool maximum size. |
ff733df7 | 283 | */ |
6b27d407 | 284 | protected abstract get maxSize (): number |
a35560ba | 285 | |
ffcbbad8 | 286 | /** |
f06e48d8 | 287 | * Gets the given worker its worker node key. |
ffcbbad8 JB |
288 | * |
289 | * @param worker - The worker. | |
f06e48d8 | 290 | * @returns The worker node key if the worker is found in the pool worker nodes, `-1` otherwise. |
ffcbbad8 | 291 | */ |
f06e48d8 JB |
292 | private getWorkerNodeKey (worker: Worker): number { |
293 | return this.workerNodes.findIndex( | |
294 | workerNode => workerNode.worker === worker | |
295 | ) | |
bf9549ae JB |
296 | } |
297 | ||
afc003b2 | 298 | /** @inheritDoc */ |
a35560ba | 299 | public setWorkerChoiceStrategy ( |
59219cbb JB |
300 | workerChoiceStrategy: WorkerChoiceStrategy, |
301 | workerChoiceStrategyOptions?: WorkerChoiceStrategyOptions | |
a35560ba | 302 | ): void { |
aee46736 | 303 | this.checkValidWorkerChoiceStrategy(workerChoiceStrategy) |
b98ec2e6 | 304 | this.opts.workerChoiceStrategy = workerChoiceStrategy |
b6b32453 JB |
305 | this.workerChoiceStrategyContext.setWorkerChoiceStrategy( |
306 | this.opts.workerChoiceStrategy | |
307 | ) | |
308 | if (workerChoiceStrategyOptions != null) { | |
309 | this.setWorkerChoiceStrategyOptions(workerChoiceStrategyOptions) | |
310 | } | |
0ebe2a9f | 311 | for (const workerNode of this.workerNodes) { |
f82cd357 | 312 | this.setWorkerNodeTasksUsage(workerNode, { |
a4e07f72 JB |
313 | tasks: { |
314 | executing: 0, | |
315 | executed: 0, | |
316 | queued: | |
317 | this.opts.enableTasksQueue === true | |
318 | ? workerNode.tasksQueue.size | |
319 | : 0, | |
320 | failed: 0 | |
321 | }, | |
322 | runTime: { | |
323 | aggregation: 0, | |
324 | average: 0, | |
325 | median: 0, | |
326 | history: new CircularArray() | |
327 | }, | |
328 | waitTime: { | |
329 | aggregation: 0, | |
330 | average: 0, | |
331 | median: 0, | |
332 | history: new CircularArray() | |
333 | }, | |
62c15a68 | 334 | elu: undefined |
f82cd357 | 335 | }) |
b6b32453 | 336 | this.setWorkerStatistics(workerNode.worker) |
59219cbb | 337 | } |
a20f0ba5 JB |
338 | } |
339 | ||
340 | /** @inheritDoc */ | |
341 | public setWorkerChoiceStrategyOptions ( | |
342 | workerChoiceStrategyOptions: WorkerChoiceStrategyOptions | |
343 | ): void { | |
0d80593b | 344 | this.checkValidWorkerChoiceStrategyOptions(workerChoiceStrategyOptions) |
a20f0ba5 JB |
345 | this.opts.workerChoiceStrategyOptions = workerChoiceStrategyOptions |
346 | this.workerChoiceStrategyContext.setOptions( | |
347 | this.opts.workerChoiceStrategyOptions | |
a35560ba S |
348 | ) |
349 | } | |
350 | ||
a20f0ba5 | 351 | /** @inheritDoc */ |
8f52842f JB |
352 | public enableTasksQueue ( |
353 | enable: boolean, | |
354 | tasksQueueOptions?: TasksQueueOptions | |
355 | ): void { | |
a20f0ba5 | 356 | if (this.opts.enableTasksQueue === true && !enable) { |
ef41a6e6 | 357 | this.flushTasksQueues() |
a20f0ba5 JB |
358 | } |
359 | this.opts.enableTasksQueue = enable | |
8f52842f | 360 | this.setTasksQueueOptions(tasksQueueOptions as TasksQueueOptions) |
a20f0ba5 JB |
361 | } |
362 | ||
363 | /** @inheritDoc */ | |
8f52842f | 364 | public setTasksQueueOptions (tasksQueueOptions: TasksQueueOptions): void { |
a20f0ba5 | 365 | if (this.opts.enableTasksQueue === true) { |
8f52842f JB |
366 | this.checkValidTasksQueueOptions(tasksQueueOptions) |
367 | this.opts.tasksQueueOptions = | |
368 | this.buildTasksQueueOptions(tasksQueueOptions) | |
5baee0d7 | 369 | } else if (this.opts.tasksQueueOptions != null) { |
a20f0ba5 JB |
370 | delete this.opts.tasksQueueOptions |
371 | } | |
372 | } | |
373 | ||
374 | private buildTasksQueueOptions ( | |
375 | tasksQueueOptions: TasksQueueOptions | |
376 | ): TasksQueueOptions { | |
377 | return { | |
378 | concurrency: tasksQueueOptions?.concurrency ?? 1 | |
379 | } | |
380 | } | |
381 | ||
c319c66b JB |
382 | /** |
383 | * Whether the pool is full or not. | |
384 | * | |
385 | * The pool filling boolean status. | |
386 | */ | |
dea903a8 JB |
387 | protected get full (): boolean { |
388 | return this.workerNodes.length >= this.maxSize | |
389 | } | |
c2ade475 | 390 | |
c319c66b JB |
391 | /** |
392 | * Whether the pool is busy or not. | |
393 | * | |
394 | * The pool busyness boolean status. | |
395 | */ | |
396 | protected abstract get busy (): boolean | |
7c0ba920 | 397 | |
c2ade475 | 398 | protected internalBusy (): boolean { |
e0ae6100 JB |
399 | return ( |
400 | this.workerNodes.findIndex(workerNode => { | |
a4e07f72 | 401 | return workerNode.workerUsage.tasks.executing === 0 |
e0ae6100 JB |
402 | }) === -1 |
403 | ) | |
cb70b19d JB |
404 | } |
405 | ||
afc003b2 | 406 | /** @inheritDoc */ |
a86b6df1 | 407 | public async execute (data?: Data, name?: string): Promise<Response> { |
b6b32453 | 408 | const timestamp = performance.now() |
20dcad1a | 409 | const workerNodeKey = this.chooseWorkerNode() |
adc3c320 | 410 | const submittedTask: Task<Data> = { |
a86b6df1 | 411 | name, |
e5a5c0fc JB |
412 | // eslint-disable-next-line @typescript-eslint/consistent-type-assertions |
413 | data: data ?? ({} as Data), | |
b6b32453 | 414 | timestamp, |
adc3c320 JB |
415 | id: crypto.randomUUID() |
416 | } | |
2e81254d | 417 | const res = new Promise<Response>((resolve, reject) => { |
02706357 | 418 | this.promiseResponseMap.set(submittedTask.id as string, { |
2e81254d JB |
419 | resolve, |
420 | reject, | |
20dcad1a | 421 | worker: this.workerNodes[workerNodeKey].worker |
2e81254d JB |
422 | }) |
423 | }) | |
ff733df7 JB |
424 | if ( |
425 | this.opts.enableTasksQueue === true && | |
7171d33f | 426 | (this.busy || |
a4e07f72 | 427 | this.workerNodes[workerNodeKey].workerUsage.tasks.executing >= |
7171d33f | 428 | ((this.opts.tasksQueueOptions as TasksQueueOptions) |
3528c992 | 429 | .concurrency as number)) |
ff733df7 | 430 | ) { |
26a929d7 JB |
431 | this.enqueueTask(workerNodeKey, submittedTask) |
432 | } else { | |
2e81254d | 433 | this.executeTask(workerNodeKey, submittedTask) |
adc3c320 | 434 | } |
b0d6ed8f | 435 | this.workerChoiceStrategyContext.update(workerNodeKey) |
ff733df7 | 436 | this.checkAndEmitEvents() |
78cea37e | 437 | // eslint-disable-next-line @typescript-eslint/return-await |
280c2a77 S |
438 | return res |
439 | } | |
c97c7edb | 440 | |
afc003b2 | 441 | /** @inheritDoc */ |
c97c7edb | 442 | public async destroy (): Promise<void> { |
1fbcaa7c | 443 | await Promise.all( |
875a7c37 JB |
444 | this.workerNodes.map(async (workerNode, workerNodeKey) => { |
445 | this.flushTasksQueue(workerNodeKey) | |
47aacbaa | 446 | // FIXME: wait for tasks to be finished |
f06e48d8 | 447 | await this.destroyWorker(workerNode.worker) |
1fbcaa7c JB |
448 | }) |
449 | ) | |
c97c7edb S |
450 | } |
451 | ||
4a6952ff | 452 | /** |
f06e48d8 | 453 | * Shutdowns the given worker. |
4a6952ff | 454 | * |
f06e48d8 | 455 | * @param worker - A worker within `workerNodes`. |
4a6952ff JB |
456 | */ |
457 | protected abstract destroyWorker (worker: Worker): void | Promise<void> | |
c97c7edb | 458 | |
729c563d | 459 | /** |
2e81254d | 460 | * Setup hook to execute code before worker node are created in the abstract constructor. |
d99ba5a8 | 461 | * Can be overridden |
afc003b2 JB |
462 | * |
463 | * @virtual | |
729c563d | 464 | */ |
280c2a77 | 465 | protected setupHook (): void { |
d99ba5a8 | 466 | // Intentionally empty |
280c2a77 | 467 | } |
c97c7edb | 468 | |
729c563d | 469 | /** |
280c2a77 S |
470 | * Should return whether the worker is the main worker or not. |
471 | */ | |
472 | protected abstract isMain (): boolean | |
473 | ||
474 | /** | |
2e81254d | 475 | * Hook executed before the worker task execution. |
bf9549ae | 476 | * Can be overridden. |
729c563d | 477 | * |
f06e48d8 | 478 | * @param workerNodeKey - The worker node key. |
729c563d | 479 | */ |
f20f344f | 480 | protected beforeTaskExecutionHook (workerNodeKey: number): void { |
a4e07f72 JB |
481 | ++this.workerNodes[workerNodeKey].workerUsage.tasks.executing |
482 | if (this.opts.enableTasksQueue === true) { | |
483 | this.workerNodes[workerNodeKey].workerUsage.tasks.queued = | |
484 | this.tasksQueueSize(workerNodeKey) | |
485 | } | |
c97c7edb S |
486 | } |
487 | ||
c01733f1 | 488 | /** |
2e81254d | 489 | * Hook executed after the worker task execution. |
bf9549ae | 490 | * Can be overridden. |
c01733f1 | 491 | * |
c923ce56 | 492 | * @param worker - The worker. |
38e795c1 | 493 | * @param message - The received message. |
c01733f1 | 494 | */ |
2e81254d | 495 | protected afterTaskExecutionHook ( |
c923ce56 | 496 | worker: Worker, |
2740a743 | 497 | message: MessageValue<Response> |
bf9549ae | 498 | ): void { |
a4e07f72 JB |
499 | const workerUsage = |
500 | this.workerNodes[this.getWorkerNodeKey(worker)].workerUsage | |
501 | const workerTaskStatistics = workerUsage.tasks | |
502 | --workerTaskStatistics.executing | |
503 | ++workerTaskStatistics.executed | |
82f36766 | 504 | if (message.taskError != null) { |
a4e07f72 | 505 | ++workerTaskStatistics.failed |
2740a743 | 506 | } |
a4e07f72 JB |
507 | |
508 | this.updateRunTimeWorkerUsage(workerUsage, message) | |
509 | this.updateWaitTimeWorkerUsage(workerUsage, message) | |
510 | this.updateEluWorkerUsage(workerUsage, message) | |
f8eb0a2a JB |
511 | } |
512 | ||
a4e07f72 JB |
513 | private updateRunTimeWorkerUsage ( |
514 | workerUsage: WorkerUsage, | |
f8eb0a2a JB |
515 | message: MessageValue<Response> |
516 | ): void { | |
b6b32453 | 517 | if (this.workerChoiceStrategyContext.getTaskStatistics().runTime) { |
a4e07f72 | 518 | workerUsage.runTime.aggregation += message.taskPerformance?.runTime ?? 0 |
c6bd2650 | 519 | if ( |
b6b32453 | 520 | this.workerChoiceStrategyContext.getTaskStatistics().avgRunTime && |
a4e07f72 | 521 | workerUsage.tasks.executed !== 0 |
c6bd2650 | 522 | ) { |
a4e07f72 JB |
523 | workerUsage.runTime.average = |
524 | workerUsage.runTime.aggregation / workerUsage.tasks.executed | |
3032893a | 525 | } |
3fa4cdd2 | 526 | if ( |
b6b32453 | 527 | this.workerChoiceStrategyContext.getTaskStatistics().medRunTime && |
d715b7bc | 528 | message.taskPerformance?.runTime != null |
3fa4cdd2 | 529 | ) { |
a4e07f72 JB |
530 | workerUsage.runTime.history.push(message.taskPerformance.runTime) |
531 | workerUsage.runTime.median = median(workerUsage.runTime.history) | |
78099a15 | 532 | } |
3032893a | 533 | } |
f8eb0a2a JB |
534 | } |
535 | ||
a4e07f72 JB |
536 | private updateWaitTimeWorkerUsage ( |
537 | workerUsage: WorkerUsage, | |
f8eb0a2a JB |
538 | message: MessageValue<Response> |
539 | ): void { | |
b6b32453 | 540 | if (this.workerChoiceStrategyContext.getTaskStatistics().waitTime) { |
a4e07f72 | 541 | workerUsage.waitTime.aggregation += message.taskPerformance?.waitTime ?? 0 |
09a6305f | 542 | if ( |
b6b32453 | 543 | this.workerChoiceStrategyContext.getTaskStatistics().avgWaitTime && |
a4e07f72 | 544 | workerUsage.tasks.executed !== 0 |
09a6305f | 545 | ) { |
a4e07f72 JB |
546 | workerUsage.waitTime.average = |
547 | workerUsage.waitTime.aggregation / workerUsage.tasks.executed | |
09a6305f JB |
548 | } |
549 | if ( | |
b6b32453 | 550 | this.workerChoiceStrategyContext.getTaskStatistics().medWaitTime && |
d715b7bc | 551 | message.taskPerformance?.waitTime != null |
09a6305f | 552 | ) { |
a4e07f72 JB |
553 | workerUsage.waitTime.history.push(message.taskPerformance.waitTime) |
554 | workerUsage.waitTime.median = median(workerUsage.waitTime.history) | |
09a6305f | 555 | } |
0567595a | 556 | } |
c01733f1 | 557 | } |
558 | ||
a4e07f72 JB |
559 | private updateEluWorkerUsage ( |
560 | workerTasksUsage: WorkerUsage, | |
62c15a68 JB |
561 | message: MessageValue<Response> |
562 | ): void { | |
b6b32453 | 563 | if (this.workerChoiceStrategyContext.getTaskStatistics().elu) { |
d715b7bc JB |
564 | if ( |
565 | workerTasksUsage.elu != null && | |
566 | message.taskPerformance?.elu != null | |
567 | ) { | |
62c15a68 | 568 | workerTasksUsage.elu = { |
d715b7bc JB |
569 | idle: workerTasksUsage.elu.idle + message.taskPerformance.elu.idle, |
570 | active: | |
571 | workerTasksUsage.elu.active + message.taskPerformance.elu.active, | |
62c15a68 | 572 | utilization: |
d715b7bc JB |
573 | (workerTasksUsage.elu.utilization + |
574 | message.taskPerformance.elu.utilization) / | |
575 | 2 | |
62c15a68 | 576 | } |
d715b7bc JB |
577 | } else if (message.taskPerformance?.elu != null) { |
578 | workerTasksUsage.elu = message.taskPerformance.elu | |
62c15a68 JB |
579 | } |
580 | } | |
581 | } | |
582 | ||
280c2a77 | 583 | /** |
f06e48d8 | 584 | * Chooses a worker node for the next task. |
280c2a77 | 585 | * |
20dcad1a | 586 | * The default worker choice strategy uses a round robin algorithm to distribute the load. |
280c2a77 | 587 | * |
20dcad1a | 588 | * @returns The worker node key |
280c2a77 | 589 | */ |
20dcad1a | 590 | protected chooseWorkerNode (): number { |
f06e48d8 | 591 | let workerNodeKey: number |
6b27d407 | 592 | if (this.type === PoolTypes.dynamic && !this.full && this.internalBusy()) { |
adc3c320 JB |
593 | const workerCreated = this.createAndSetupWorker() |
594 | this.registerWorkerMessageListener(workerCreated, message => { | |
a4958de2 | 595 | const currentWorkerNodeKey = this.getWorkerNodeKey(workerCreated) |
17393ac8 JB |
596 | if ( |
597 | isKillBehavior(KillBehaviors.HARD, message.kill) || | |
d2097c13 | 598 | (message.kill != null && |
a4e07f72 JB |
599 | this.workerNodes[currentWorkerNodeKey].workerUsage.tasks |
600 | .executing === 0) | |
17393ac8 | 601 | ) { |
ff733df7 | 602 | // Kill message received from the worker: no new tasks are submitted to that worker for a while ( > maxInactiveTime) |
a4958de2 | 603 | this.flushTasksQueue(currentWorkerNodeKey) |
47aacbaa | 604 | // FIXME: wait for tasks to be finished |
7c5a1080 | 605 | void (this.destroyWorker(workerCreated) as Promise<void>) |
17393ac8 JB |
606 | } |
607 | }) | |
adc3c320 | 608 | workerNodeKey = this.getWorkerNodeKey(workerCreated) |
17393ac8 | 609 | } else { |
f06e48d8 | 610 | workerNodeKey = this.workerChoiceStrategyContext.execute() |
17393ac8 | 611 | } |
20dcad1a | 612 | return workerNodeKey |
c97c7edb S |
613 | } |
614 | ||
280c2a77 | 615 | /** |
675bb809 | 616 | * Sends a message to the given worker. |
280c2a77 | 617 | * |
38e795c1 JB |
618 | * @param worker - The worker which should receive the message. |
619 | * @param message - The message. | |
280c2a77 S |
620 | */ |
621 | protected abstract sendToWorker ( | |
622 | worker: Worker, | |
623 | message: MessageValue<Data> | |
624 | ): void | |
625 | ||
4a6952ff | 626 | /** |
f06e48d8 | 627 | * Registers a listener callback on the given worker. |
4a6952ff | 628 | * |
38e795c1 JB |
629 | * @param worker - The worker which should register a listener. |
630 | * @param listener - The message listener callback. | |
4a6952ff JB |
631 | */ |
632 | protected abstract registerWorkerMessageListener< | |
4f7fa42a | 633 | Message extends Data | Response |
78cea37e | 634 | >(worker: Worker, listener: (message: MessageValue<Message>) => void): void |
c97c7edb | 635 | |
729c563d S |
636 | /** |
637 | * Returns a newly created worker. | |
638 | */ | |
280c2a77 | 639 | protected abstract createWorker (): Worker |
c97c7edb | 640 | |
729c563d | 641 | /** |
f06e48d8 | 642 | * Function that can be hooked up when a worker has been newly created and moved to the pool worker nodes. |
729c563d | 643 | * |
38e795c1 | 644 | * Can be used to update the `maxListeners` or binding the `main-worker`\<-\>`worker` connection if not bind by default. |
729c563d | 645 | * |
38e795c1 | 646 | * @param worker - The newly created worker. |
729c563d | 647 | */ |
280c2a77 | 648 | protected abstract afterWorkerSetup (worker: Worker): void |
c97c7edb | 649 | |
4a6952ff | 650 | /** |
f06e48d8 | 651 | * Creates a new worker and sets it up completely in the pool worker nodes. |
4a6952ff JB |
652 | * |
653 | * @returns New, completely set up worker. | |
654 | */ | |
655 | protected createAndSetupWorker (): Worker { | |
bdacc2d2 | 656 | const worker = this.createWorker() |
280c2a77 | 657 | |
35cf1c03 | 658 | worker.on('message', this.opts.messageHandler ?? EMPTY_FUNCTION) |
a35560ba | 659 | worker.on('error', this.opts.errorHandler ?? EMPTY_FUNCTION) |
1f68cede JB |
660 | worker.on('error', error => { |
661 | if (this.emitter != null) { | |
662 | this.emitter.emit(PoolEvents.error, error) | |
663 | } | |
664 | }) | |
5baee0d7 JB |
665 | worker.on('error', () => { |
666 | if (this.opts.restartWorkerOnError === true) { | |
1f68cede | 667 | this.createAndSetupWorker() |
5baee0d7 JB |
668 | } |
669 | }) | |
a35560ba S |
670 | worker.on('online', this.opts.onlineHandler ?? EMPTY_FUNCTION) |
671 | worker.on('exit', this.opts.exitHandler ?? EMPTY_FUNCTION) | |
a974afa6 | 672 | worker.once('exit', () => { |
f06e48d8 | 673 | this.removeWorkerNode(worker) |
a974afa6 | 674 | }) |
280c2a77 | 675 | |
f06e48d8 | 676 | this.pushWorkerNode(worker) |
280c2a77 | 677 | |
b6b32453 JB |
678 | this.setWorkerStatistics(worker) |
679 | ||
280c2a77 S |
680 | this.afterWorkerSetup(worker) |
681 | ||
c97c7edb S |
682 | return worker |
683 | } | |
be0676b3 APA |
684 | |
685 | /** | |
ff733df7 | 686 | * This function is the listener registered for each worker message. |
be0676b3 | 687 | * |
bdacc2d2 | 688 | * @returns The listener function to execute when a message is received from a worker. |
be0676b3 APA |
689 | */ |
690 | protected workerListener (): (message: MessageValue<Response>) => void { | |
4a6952ff | 691 | return message => { |
b1989cfd | 692 | if (message.id != null) { |
a3445496 | 693 | // Task execution response received |
2740a743 | 694 | const promiseResponse = this.promiseResponseMap.get(message.id) |
b1989cfd | 695 | if (promiseResponse != null) { |
82f36766 JB |
696 | if (message.taskError != null) { |
697 | promiseResponse.reject(message.taskError.message) | |
91ee39ed | 698 | if (this.emitter != null) { |
82f36766 | 699 | this.emitter.emit(PoolEvents.taskError, message.taskError) |
91ee39ed | 700 | } |
a05c10de | 701 | } else { |
2740a743 | 702 | promiseResponse.resolve(message.data as Response) |
a05c10de | 703 | } |
2e81254d | 704 | this.afterTaskExecutionHook(promiseResponse.worker, message) |
2740a743 | 705 | this.promiseResponseMap.delete(message.id) |
ff733df7 JB |
706 | const workerNodeKey = this.getWorkerNodeKey(promiseResponse.worker) |
707 | if ( | |
708 | this.opts.enableTasksQueue === true && | |
416fd65c | 709 | this.tasksQueueSize(workerNodeKey) > 0 |
ff733df7 | 710 | ) { |
2e81254d JB |
711 | this.executeTask( |
712 | workerNodeKey, | |
ff733df7 JB |
713 | this.dequeueTask(workerNodeKey) as Task<Data> |
714 | ) | |
715 | } | |
be0676b3 APA |
716 | } |
717 | } | |
718 | } | |
be0676b3 | 719 | } |
7c0ba920 | 720 | |
ff733df7 | 721 | private checkAndEmitEvents (): void { |
1f68cede | 722 | if (this.emitter != null) { |
ff733df7 | 723 | if (this.busy) { |
6b27d407 | 724 | this.emitter?.emit(PoolEvents.busy, this.info) |
ff733df7 | 725 | } |
6b27d407 JB |
726 | if (this.type === PoolTypes.dynamic && this.full) { |
727 | this.emitter?.emit(PoolEvents.full, this.info) | |
ff733df7 | 728 | } |
164d950a JB |
729 | } |
730 | } | |
731 | ||
0ebe2a9f JB |
732 | /** |
733 | * Sets the given worker node its tasks usage in the pool. | |
734 | * | |
735 | * @param workerNode - The worker node. | |
a4e07f72 | 736 | * @param workerUsage - The worker usage. |
0ebe2a9f JB |
737 | */ |
738 | private setWorkerNodeTasksUsage ( | |
739 | workerNode: WorkerNode<Worker, Data>, | |
a4e07f72 | 740 | workerUsage: WorkerUsage |
0ebe2a9f | 741 | ): void { |
a4e07f72 | 742 | workerNode.workerUsage = workerUsage |
0ebe2a9f JB |
743 | } |
744 | ||
a05c10de | 745 | /** |
f06e48d8 | 746 | * Pushes the given worker in the pool worker nodes. |
ea7a90d3 | 747 | * |
38e795c1 | 748 | * @param worker - The worker. |
f06e48d8 | 749 | * @returns The worker nodes length. |
ea7a90d3 | 750 | */ |
f06e48d8 JB |
751 | private pushWorkerNode (worker: Worker): number { |
752 | return this.workerNodes.push({ | |
ffcbbad8 | 753 | worker, |
a4e07f72 JB |
754 | workerUsage: { |
755 | tasks: { | |
756 | executed: 0, | |
757 | executing: 0, | |
758 | queued: 0, | |
759 | failed: 0 | |
760 | }, | |
761 | runTime: { | |
762 | aggregation: 0, | |
763 | average: 0, | |
764 | median: 0, | |
765 | history: new CircularArray() | |
766 | }, | |
767 | ||
768 | waitTime: { | |
769 | aggregation: 0, | |
770 | average: 0, | |
771 | median: 0, | |
772 | history: new CircularArray() | |
773 | }, | |
62c15a68 | 774 | elu: undefined |
f82cd357 | 775 | }, |
29ee7e9a | 776 | tasksQueue: new Queue<Task<Data>>() |
ea7a90d3 JB |
777 | }) |
778 | } | |
c923ce56 JB |
779 | |
780 | /** | |
f06e48d8 | 781 | * Sets the given worker in the pool worker nodes. |
c923ce56 | 782 | * |
f06e48d8 | 783 | * @param workerNodeKey - The worker node key. |
c923ce56 | 784 | * @param worker - The worker. |
a4e07f72 | 785 | * @param workerUsage - The worker usage. |
f06e48d8 | 786 | * @param tasksQueue - The worker task queue. |
c923ce56 | 787 | */ |
f06e48d8 JB |
788 | private setWorkerNode ( |
789 | workerNodeKey: number, | |
c923ce56 | 790 | worker: Worker, |
a4e07f72 | 791 | workerUsage: WorkerUsage, |
29ee7e9a | 792 | tasksQueue: Queue<Task<Data>> |
c923ce56 | 793 | ): void { |
f06e48d8 | 794 | this.workerNodes[workerNodeKey] = { |
c923ce56 | 795 | worker, |
a4e07f72 | 796 | workerUsage, |
f06e48d8 | 797 | tasksQueue |
c923ce56 JB |
798 | } |
799 | } | |
51fe3d3c JB |
800 | |
801 | /** | |
f06e48d8 | 802 | * Removes the given worker from the pool worker nodes. |
51fe3d3c | 803 | * |
f06e48d8 | 804 | * @param worker - The worker. |
51fe3d3c | 805 | */ |
416fd65c | 806 | private removeWorkerNode (worker: Worker): void { |
f06e48d8 | 807 | const workerNodeKey = this.getWorkerNodeKey(worker) |
1f68cede JB |
808 | if (workerNodeKey !== -1) { |
809 | this.workerNodes.splice(workerNodeKey, 1) | |
810 | this.workerChoiceStrategyContext.remove(workerNodeKey) | |
811 | } | |
51fe3d3c | 812 | } |
adc3c320 | 813 | |
2e81254d | 814 | private executeTask (workerNodeKey: number, task: Task<Data>): void { |
027c2215 | 815 | this.beforeTaskExecutionHook(workerNodeKey) |
2e81254d JB |
816 | this.sendToWorker(this.workerNodes[workerNodeKey].worker, task) |
817 | } | |
818 | ||
f9f00b5f | 819 | private enqueueTask (workerNodeKey: number, task: Task<Data>): number { |
29ee7e9a | 820 | return this.workerNodes[workerNodeKey].tasksQueue.enqueue(task) |
adc3c320 JB |
821 | } |
822 | ||
416fd65c | 823 | private dequeueTask (workerNodeKey: number): Task<Data> | undefined { |
29ee7e9a | 824 | return this.workerNodes[workerNodeKey].tasksQueue.dequeue() |
adc3c320 JB |
825 | } |
826 | ||
416fd65c | 827 | private tasksQueueSize (workerNodeKey: number): number { |
4d8bf9e4 | 828 | return this.workerNodes[workerNodeKey].tasksQueue.size |
adc3c320 | 829 | } |
ff733df7 | 830 | |
416fd65c JB |
831 | private flushTasksQueue (workerNodeKey: number): void { |
832 | if (this.tasksQueueSize(workerNodeKey) > 0) { | |
29ee7e9a JB |
833 | for (let i = 0; i < this.tasksQueueSize(workerNodeKey); i++) { |
834 | this.executeTask( | |
835 | workerNodeKey, | |
836 | this.dequeueTask(workerNodeKey) as Task<Data> | |
837 | ) | |
ff733df7 | 838 | } |
ff733df7 JB |
839 | } |
840 | } | |
841 | ||
ef41a6e6 JB |
842 | private flushTasksQueues (): void { |
843 | for (const [workerNodeKey] of this.workerNodes.entries()) { | |
844 | this.flushTasksQueue(workerNodeKey) | |
845 | } | |
846 | } | |
b6b32453 JB |
847 | |
848 | private setWorkerStatistics (worker: Worker): void { | |
849 | this.sendToWorker(worker, { | |
850 | statistics: { | |
851 | runTime: this.workerChoiceStrategyContext.getTaskStatistics().runTime, | |
852 | waitTime: this.workerChoiceStrategyContext.getTaskStatistics().waitTime, | |
853 | elu: this.workerChoiceStrategyContext.getTaskStatistics().elu | |
854 | } | |
855 | }) | |
856 | } | |
c97c7edb | 857 | } |