Commit | Line | Data |
---|---|---|
ded253e2 | 1 | import { AsyncResource } from 'node:async_hooks' |
2845f2a5 | 2 | import { randomUUID } from 'node:crypto' |
ded253e2 | 3 | import { EventEmitterAsyncResource } from 'node:events' |
62c15a68 | 4 | import { performance } from 'node:perf_hooks' |
ef083f7b | 5 | import type { TransferListItem } from 'node:worker_threads' |
ded253e2 | 6 | |
5c4d16da JB |
7 | import type { |
8 | MessageValue, | |
9 | PromiseResponseWrapper, | |
76d91ea0 | 10 | Task |
d35e5717 | 11 | } from '../utility-types.js' |
bbeadd16 | 12 | import { |
ded253e2 | 13 | average, |
ff128cc9 | 14 | DEFAULT_TASK_NAME, |
bbeadd16 | 15 | EMPTY_FUNCTION, |
463226a4 | 16 | exponentialDelay, |
59317253 | 17 | isKillBehavior, |
0d80593b | 18 | isPlainObject, |
90d6701c | 19 | max, |
afe0d5bf | 20 | median, |
90d6701c | 21 | min, |
463226a4 JB |
22 | round, |
23 | sleep | |
d35e5717 | 24 | } from '../utils.js' |
d35e5717 | 25 | import type { TaskFunction } from '../worker/task-functions.js' |
ded253e2 | 26 | import { KillBehaviors } from '../worker/worker-options.js' |
c4855468 | 27 | import { |
65d7a1c9 | 28 | type IPool, |
c4855468 | 29 | PoolEvents, |
6b27d407 | 30 | type PoolInfo, |
c4855468 | 31 | type PoolOptions, |
6b27d407 JB |
32 | type PoolType, |
33 | PoolTypes, | |
4b628b48 | 34 | type TasksQueueOptions |
d35e5717 | 35 | } from './pool.js' |
a35560ba | 36 | import { |
f0d7f803 | 37 | Measurements, |
a35560ba | 38 | WorkerChoiceStrategies, |
a20f0ba5 JB |
39 | type WorkerChoiceStrategy, |
40 | type WorkerChoiceStrategyOptions | |
d35e5717 JB |
41 | } from './selection-strategies/selection-strategies-types.js' |
42 | import { WorkerChoiceStrategyContext } from './selection-strategies/worker-choice-strategy-context.js' | |
bde6b5d7 JB |
43 | import { |
44 | checkFilePath, | |
45 | checkValidTasksQueueOptions, | |
bfc75cca | 46 | checkValidWorkerChoiceStrategy, |
32b141fd | 47 | getDefaultTasksQueueOptions, |
c329fd41 JB |
48 | updateEluWorkerUsage, |
49 | updateRunTimeWorkerUsage, | |
50 | updateTaskStatisticsWorkerUsage, | |
51 | updateWaitTimeWorkerUsage, | |
87347ea8 | 52 | waitWorkerNodeEvents |
d35e5717 | 53 | } from './utils.js' |
ded253e2 JB |
54 | import { version } from './version.js' |
55 | import type { | |
56 | IWorker, | |
57 | IWorkerNode, | |
58 | WorkerInfo, | |
59 | WorkerNodeEventDetail, | |
60 | WorkerType | |
61 | } from './worker.js' | |
62 | import { WorkerNode } from './worker-node.js' | |
23ccf9d7 | 63 | |
729c563d | 64 | /** |
ea7a90d3 | 65 | * Base class that implements some shared logic for all poolifier pools. |
729c563d | 66 | * |
38e795c1 | 67 | * @typeParam Worker - Type of worker which manages this pool. |
e102732c JB |
68 | * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data. |
69 | * @typeParam Response - Type of execution response. This can only be structured-cloneable data. | |
729c563d | 70 | */ |
c97c7edb | 71 | export abstract class AbstractPool< |
f06e48d8 | 72 | Worker extends IWorker, |
d3c8a1a8 S |
73 | Data = unknown, |
74 | Response = unknown | |
c4855468 | 75 | > implements IPool<Worker, Data, Response> { |
afc003b2 | 76 | /** @inheritDoc */ |
4b628b48 | 77 | public readonly workerNodes: Array<IWorkerNode<Worker, Data>> = [] |
4a6952ff | 78 | |
afc003b2 | 79 | /** @inheritDoc */ |
f80125ca | 80 | public emitter?: EventEmitterAsyncResource |
7c0ba920 | 81 | |
be0676b3 | 82 | /** |
419e8121 | 83 | * The task execution response promise map: |
2740a743 | 84 | * - `key`: The message id of each submitted task. |
a3445496 | 85 | * - `value`: An object that contains the worker, the execution response promise resolve and reject callbacks. |
be0676b3 | 86 | * |
a3445496 | 87 | * When we receive a message from the worker, we get a map entry with the promise resolve/reject bound to the message id. |
be0676b3 | 88 | */ |
501aea93 JB |
89 | protected promiseResponseMap: Map<string, PromiseResponseWrapper<Response>> = |
90 | new Map<string, PromiseResponseWrapper<Response>>() | |
c97c7edb | 91 | |
a35560ba | 92 | /** |
51fe3d3c | 93 | * Worker choice strategy context referencing a worker choice algorithm implementation. |
a35560ba | 94 | */ |
c63a35a0 | 95 | protected workerChoiceStrategyContext?: WorkerChoiceStrategyContext< |
78cea37e JB |
96 | Worker, |
97 | Data, | |
98 | Response | |
a35560ba S |
99 | > |
100 | ||
72ae84a2 JB |
101 | /** |
102 | * The task functions added at runtime map: | |
103 | * - `key`: The task function name. | |
104 | * - `value`: The task function itself. | |
105 | */ | |
106 | private readonly taskFunctions: Map<string, TaskFunction<Data, Response>> | |
107 | ||
15b176e0 JB |
108 | /** |
109 | * Whether the pool is started or not. | |
110 | */ | |
111 | private started: boolean | |
47352846 JB |
112 | /** |
113 | * Whether the pool is starting or not. | |
114 | */ | |
115 | private starting: boolean | |
711623b8 JB |
116 | /** |
117 | * Whether the pool is destroying or not. | |
118 | */ | |
119 | private destroying: boolean | |
b362a929 JB |
120 | /** |
121 | * Whether the minimum number of workers is starting or not. | |
122 | */ | |
123 | private startingMinimumNumberOfWorkers: boolean | |
55082af9 JB |
124 | /** |
125 | * Whether the pool ready event has been emitted or not. | |
126 | */ | |
127 | private readyEventEmitted: boolean | |
afe0d5bf JB |
128 | /** |
129 | * The start timestamp of the pool. | |
130 | */ | |
131 | private readonly startTimestamp | |
132 | ||
729c563d S |
133 | /** |
134 | * Constructs a new poolifier pool. | |
135 | * | |
00e1bdeb | 136 | * @param minimumNumberOfWorkers - Minimum number of workers that this pool manages. |
029715f0 | 137 | * @param filePath - Path to the worker file. |
38e795c1 | 138 | * @param opts - Options for the pool. |
00e1bdeb | 139 | * @param maximumNumberOfWorkers - Maximum number of workers that this pool manages. |
729c563d | 140 | */ |
c97c7edb | 141 | public constructor ( |
26ce26ca | 142 | protected readonly minimumNumberOfWorkers: number, |
b4213b7f | 143 | protected readonly filePath: string, |
26ce26ca JB |
144 | protected readonly opts: PoolOptions<Worker>, |
145 | protected readonly maximumNumberOfWorkers?: number | |
c97c7edb | 146 | ) { |
78cea37e | 147 | if (!this.isMain()) { |
04f45163 | 148 | throw new Error( |
8c6d4acf | 149 | 'Cannot start a pool from a worker with the same type as the pool' |
04f45163 | 150 | ) |
c97c7edb | 151 | } |
26ce26ca | 152 | this.checkPoolType() |
bde6b5d7 | 153 | checkFilePath(this.filePath) |
26ce26ca | 154 | this.checkMinimumNumberOfWorkers(this.minimumNumberOfWorkers) |
7c0ba920 | 155 | this.checkPoolOptions(this.opts) |
1086026a | 156 | |
7254e419 JB |
157 | this.chooseWorkerNode = this.chooseWorkerNode.bind(this) |
158 | this.executeTask = this.executeTask.bind(this) | |
159 | this.enqueueTask = this.enqueueTask.bind(this) | |
1086026a | 160 | |
6bd72cd0 | 161 | if (this.opts.enableEvents === true) { |
b5604034 | 162 | this.initializeEventEmitter() |
7c0ba920 | 163 | } |
d59df138 JB |
164 | this.workerChoiceStrategyContext = new WorkerChoiceStrategyContext< |
165 | Worker, | |
166 | Data, | |
167 | Response | |
da309861 JB |
168 | >( |
169 | this, | |
170 | this.opts.workerChoiceStrategy, | |
171 | this.opts.workerChoiceStrategyOptions | |
172 | ) | |
b6b32453 JB |
173 | |
174 | this.setupHook() | |
175 | ||
72ae84a2 JB |
176 | this.taskFunctions = new Map<string, TaskFunction<Data, Response>>() |
177 | ||
47352846 | 178 | this.started = false |
075e51d1 | 179 | this.starting = false |
711623b8 | 180 | this.destroying = false |
55082af9 | 181 | this.readyEventEmitted = false |
b362a929 | 182 | this.startingMinimumNumberOfWorkers = false |
47352846 JB |
183 | if (this.opts.startWorkers === true) { |
184 | this.start() | |
185 | } | |
afe0d5bf JB |
186 | |
187 | this.startTimestamp = performance.now() | |
c97c7edb S |
188 | } |
189 | ||
26ce26ca JB |
190 | private checkPoolType (): void { |
191 | if (this.type === PoolTypes.fixed && this.maximumNumberOfWorkers != null) { | |
192 | throw new Error( | |
193 | 'Cannot instantiate a fixed pool with a maximum number of workers specified at initialization' | |
194 | ) | |
195 | } | |
196 | } | |
197 | ||
c63a35a0 JB |
198 | private checkMinimumNumberOfWorkers ( |
199 | minimumNumberOfWorkers: number | undefined | |
200 | ): void { | |
af7f2788 | 201 | if (minimumNumberOfWorkers == null) { |
8d3782fa JB |
202 | throw new Error( |
203 | 'Cannot instantiate a pool without specifying the number of workers' | |
204 | ) | |
af7f2788 | 205 | } else if (!Number.isSafeInteger(minimumNumberOfWorkers)) { |
473c717a | 206 | throw new TypeError( |
0d80593b | 207 | 'Cannot instantiate a pool with a non safe integer number of workers' |
8d3782fa | 208 | ) |
af7f2788 | 209 | } else if (minimumNumberOfWorkers < 0) { |
473c717a | 210 | throw new RangeError( |
8d3782fa JB |
211 | 'Cannot instantiate a pool with a negative number of workers' |
212 | ) | |
af7f2788 | 213 | } else if (this.type === PoolTypes.fixed && minimumNumberOfWorkers === 0) { |
2431bdb4 JB |
214 | throw new RangeError('Cannot instantiate a fixed pool with zero worker') |
215 | } | |
216 | } | |
217 | ||
7c0ba920 | 218 | private checkPoolOptions (opts: PoolOptions<Worker>): void { |
0d80593b | 219 | if (isPlainObject(opts)) { |
47352846 | 220 | this.opts.startWorkers = opts.startWorkers ?? true |
c63a35a0 | 221 | checkValidWorkerChoiceStrategy(opts.workerChoiceStrategy) |
0d80593b JB |
222 | this.opts.workerChoiceStrategy = |
223 | opts.workerChoiceStrategy ?? WorkerChoiceStrategies.ROUND_ROBIN | |
2324f8c9 | 224 | this.checkValidWorkerChoiceStrategyOptions( |
c63a35a0 | 225 | opts.workerChoiceStrategyOptions |
2324f8c9 | 226 | ) |
26ce26ca JB |
227 | if (opts.workerChoiceStrategyOptions != null) { |
228 | this.opts.workerChoiceStrategyOptions = opts.workerChoiceStrategyOptions | |
8990357d | 229 | } |
1f68cede | 230 | this.opts.restartWorkerOnError = opts.restartWorkerOnError ?? true |
0d80593b JB |
231 | this.opts.enableEvents = opts.enableEvents ?? true |
232 | this.opts.enableTasksQueue = opts.enableTasksQueue ?? false | |
233 | if (this.opts.enableTasksQueue) { | |
c63a35a0 | 234 | checkValidTasksQueueOptions(opts.tasksQueueOptions) |
0d80593b | 235 | this.opts.tasksQueueOptions = this.buildTasksQueueOptions( |
c63a35a0 | 236 | opts.tasksQueueOptions |
0d80593b JB |
237 | ) |
238 | } | |
239 | } else { | |
240 | throw new TypeError('Invalid pool options: must be a plain object') | |
7171d33f | 241 | } |
aee46736 JB |
242 | } |
243 | ||
0d80593b | 244 | private checkValidWorkerChoiceStrategyOptions ( |
c63a35a0 | 245 | workerChoiceStrategyOptions: WorkerChoiceStrategyOptions | undefined |
0d80593b | 246 | ): void { |
2324f8c9 JB |
247 | if ( |
248 | workerChoiceStrategyOptions != null && | |
249 | !isPlainObject(workerChoiceStrategyOptions) | |
250 | ) { | |
0d80593b JB |
251 | throw new TypeError( |
252 | 'Invalid worker choice strategy options: must be a plain object' | |
253 | ) | |
254 | } | |
49be33fe | 255 | if ( |
2324f8c9 | 256 | workerChoiceStrategyOptions?.weights != null && |
26ce26ca JB |
257 | Object.keys(workerChoiceStrategyOptions.weights).length !== |
258 | (this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers) | |
49be33fe JB |
259 | ) { |
260 | throw new Error( | |
261 | 'Invalid worker choice strategy options: must have a weight for each worker node' | |
262 | ) | |
263 | } | |
f0d7f803 | 264 | if ( |
2324f8c9 | 265 | workerChoiceStrategyOptions?.measurement != null && |
f0d7f803 JB |
266 | !Object.values(Measurements).includes( |
267 | workerChoiceStrategyOptions.measurement | |
268 | ) | |
269 | ) { | |
270 | throw new Error( | |
271 | `Invalid worker choice strategy options: invalid measurement '${workerChoiceStrategyOptions.measurement}'` | |
272 | ) | |
273 | } | |
0d80593b JB |
274 | } |
275 | ||
b5604034 | 276 | private initializeEventEmitter (): void { |
5b7d00b4 | 277 | this.emitter = new EventEmitterAsyncResource({ |
b5604034 JB |
278 | name: `poolifier:${this.type}-${this.worker}-pool` |
279 | }) | |
280 | } | |
281 | ||
08f3f44c | 282 | /** @inheritDoc */ |
6b27d407 JB |
283 | public get info (): PoolInfo { |
284 | return { | |
23ccf9d7 | 285 | version, |
6b27d407 | 286 | type: this.type, |
184855e6 | 287 | worker: this.worker, |
47352846 | 288 | started: this.started, |
2431bdb4 | 289 | ready: this.ready, |
67f3f2d6 JB |
290 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
291 | strategy: this.opts.workerChoiceStrategy!, | |
0e8587d2 | 292 | strategyRetries: this.workerChoiceStrategyContext?.retriesCount ?? 0, |
26ce26ca JB |
293 | minSize: this.minimumNumberOfWorkers, |
294 | maxSize: this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers, | |
295 | ...(this.workerChoiceStrategyContext?.getTaskStatisticsRequirements() | |
f4d0a470 | 296 | .runTime.aggregate === true && |
c63a35a0 JB |
297 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements() |
298 | .waitTime.aggregate && { | |
299 | utilization: round(this.utilization) | |
300 | }), | |
6b27d407 JB |
301 | workerNodes: this.workerNodes.length, |
302 | idleWorkerNodes: this.workerNodes.reduce( | |
303 | (accumulator, workerNode) => | |
f59e1027 | 304 | workerNode.usage.tasks.executing === 0 |
a4e07f72 JB |
305 | ? accumulator + 1 |
306 | : accumulator, | |
6b27d407 JB |
307 | 0 |
308 | ), | |
5eb72b9e JB |
309 | ...(this.opts.enableTasksQueue === true && { |
310 | stealingWorkerNodes: this.workerNodes.reduce( | |
311 | (accumulator, workerNode) => | |
312 | workerNode.info.stealing ? accumulator + 1 : accumulator, | |
313 | 0 | |
314 | ) | |
315 | }), | |
6b27d407 | 316 | busyWorkerNodes: this.workerNodes.reduce( |
42c677c1 JB |
317 | (accumulator, _workerNode, workerNodeKey) => |
318 | this.isWorkerNodeBusy(workerNodeKey) ? accumulator + 1 : accumulator, | |
6b27d407 JB |
319 | 0 |
320 | ), | |
a4e07f72 | 321 | executedTasks: this.workerNodes.reduce( |
6b27d407 | 322 | (accumulator, workerNode) => |
f59e1027 | 323 | accumulator + workerNode.usage.tasks.executed, |
a4e07f72 JB |
324 | 0 |
325 | ), | |
326 | executingTasks: this.workerNodes.reduce( | |
327 | (accumulator, workerNode) => | |
f59e1027 | 328 | accumulator + workerNode.usage.tasks.executing, |
6b27d407 JB |
329 | 0 |
330 | ), | |
daf86646 JB |
331 | ...(this.opts.enableTasksQueue === true && { |
332 | queuedTasks: this.workerNodes.reduce( | |
333 | (accumulator, workerNode) => | |
334 | accumulator + workerNode.usage.tasks.queued, | |
335 | 0 | |
336 | ) | |
337 | }), | |
338 | ...(this.opts.enableTasksQueue === true && { | |
339 | maxQueuedTasks: this.workerNodes.reduce( | |
340 | (accumulator, workerNode) => | |
c63a35a0 | 341 | accumulator + (workerNode.usage.tasks.maxQueued ?? 0), |
daf86646 JB |
342 | 0 |
343 | ) | |
344 | }), | |
a1763c54 JB |
345 | ...(this.opts.enableTasksQueue === true && { |
346 | backPressure: this.hasBackPressure() | |
347 | }), | |
68cbdc84 JB |
348 | ...(this.opts.enableTasksQueue === true && { |
349 | stolenTasks: this.workerNodes.reduce( | |
350 | (accumulator, workerNode) => | |
351 | accumulator + workerNode.usage.tasks.stolen, | |
352 | 0 | |
353 | ) | |
354 | }), | |
a4e07f72 JB |
355 | failedTasks: this.workerNodes.reduce( |
356 | (accumulator, workerNode) => | |
f59e1027 | 357 | accumulator + workerNode.usage.tasks.failed, |
a4e07f72 | 358 | 0 |
1dcf8b7b | 359 | ), |
26ce26ca | 360 | ...(this.workerChoiceStrategyContext?.getTaskStatisticsRequirements() |
f4d0a470 | 361 | .runTime.aggregate === true && { |
1dcf8b7b | 362 | runTime: { |
98e72cda | 363 | minimum: round( |
90d6701c | 364 | min( |
98e72cda | 365 | ...this.workerNodes.map( |
c63a35a0 | 366 | workerNode => workerNode.usage.runTime.minimum ?? Infinity |
98e72cda | 367 | ) |
1dcf8b7b JB |
368 | ) |
369 | ), | |
98e72cda | 370 | maximum: round( |
90d6701c | 371 | max( |
98e72cda | 372 | ...this.workerNodes.map( |
c63a35a0 | 373 | workerNode => workerNode.usage.runTime.maximum ?? -Infinity |
98e72cda | 374 | ) |
1dcf8b7b | 375 | ) |
98e72cda | 376 | ), |
c63a35a0 | 377 | ...(this.workerChoiceStrategyContext.getTaskStatisticsRequirements() |
3baa0837 JB |
378 | .runTime.average && { |
379 | average: round( | |
380 | average( | |
381 | this.workerNodes.reduce<number[]>( | |
382 | (accumulator, workerNode) => | |
383 | accumulator.concat(workerNode.usage.runTime.history), | |
384 | [] | |
385 | ) | |
98e72cda | 386 | ) |
dc021bcc | 387 | ) |
3baa0837 | 388 | }), |
c63a35a0 | 389 | ...(this.workerChoiceStrategyContext.getTaskStatisticsRequirements() |
98e72cda JB |
390 | .runTime.median && { |
391 | median: round( | |
392 | median( | |
3baa0837 JB |
393 | this.workerNodes.reduce<number[]>( |
394 | (accumulator, workerNode) => | |
395 | accumulator.concat(workerNode.usage.runTime.history), | |
396 | [] | |
98e72cda JB |
397 | ) |
398 | ) | |
399 | ) | |
400 | }) | |
1dcf8b7b JB |
401 | } |
402 | }), | |
26ce26ca | 403 | ...(this.workerChoiceStrategyContext?.getTaskStatisticsRequirements() |
f4d0a470 | 404 | .waitTime.aggregate === true && { |
1dcf8b7b | 405 | waitTime: { |
98e72cda | 406 | minimum: round( |
90d6701c | 407 | min( |
98e72cda | 408 | ...this.workerNodes.map( |
c63a35a0 | 409 | workerNode => workerNode.usage.waitTime.minimum ?? Infinity |
98e72cda | 410 | ) |
1dcf8b7b JB |
411 | ) |
412 | ), | |
98e72cda | 413 | maximum: round( |
90d6701c | 414 | max( |
98e72cda | 415 | ...this.workerNodes.map( |
c63a35a0 | 416 | workerNode => workerNode.usage.waitTime.maximum ?? -Infinity |
98e72cda | 417 | ) |
1dcf8b7b | 418 | ) |
98e72cda | 419 | ), |
c63a35a0 | 420 | ...(this.workerChoiceStrategyContext.getTaskStatisticsRequirements() |
3baa0837 JB |
421 | .waitTime.average && { |
422 | average: round( | |
423 | average( | |
424 | this.workerNodes.reduce<number[]>( | |
425 | (accumulator, workerNode) => | |
426 | accumulator.concat(workerNode.usage.waitTime.history), | |
427 | [] | |
428 | ) | |
98e72cda | 429 | ) |
dc021bcc | 430 | ) |
3baa0837 | 431 | }), |
c63a35a0 | 432 | ...(this.workerChoiceStrategyContext.getTaskStatisticsRequirements() |
98e72cda JB |
433 | .waitTime.median && { |
434 | median: round( | |
435 | median( | |
3baa0837 JB |
436 | this.workerNodes.reduce<number[]>( |
437 | (accumulator, workerNode) => | |
438 | accumulator.concat(workerNode.usage.waitTime.history), | |
439 | [] | |
98e72cda JB |
440 | ) |
441 | ) | |
442 | ) | |
443 | }) | |
1dcf8b7b JB |
444 | } |
445 | }) | |
6b27d407 JB |
446 | } |
447 | } | |
08f3f44c | 448 | |
aa9eede8 JB |
449 | /** |
450 | * The pool readiness boolean status. | |
451 | */ | |
2431bdb4 | 452 | private get ready (): boolean { |
8e8d9101 JB |
453 | if (this.empty) { |
454 | return false | |
455 | } | |
2431bdb4 | 456 | return ( |
b97d82d8 JB |
457 | this.workerNodes.reduce( |
458 | (accumulator, workerNode) => | |
459 | !workerNode.info.dynamic && workerNode.info.ready | |
460 | ? accumulator + 1 | |
461 | : accumulator, | |
462 | 0 | |
26ce26ca | 463 | ) >= this.minimumNumberOfWorkers |
2431bdb4 JB |
464 | ) |
465 | } | |
466 | ||
8e8d9101 JB |
467 | /** |
468 | * The pool emptiness boolean status. | |
469 | */ | |
470 | protected get empty (): boolean { | |
fb43035c | 471 | return this.minimumNumberOfWorkers === 0 && this.workerNodes.length === 0 |
8e8d9101 JB |
472 | } |
473 | ||
afe0d5bf | 474 | /** |
aa9eede8 | 475 | * The approximate pool utilization. |
afe0d5bf JB |
476 | * |
477 | * @returns The pool utilization. | |
478 | */ | |
479 | private get utilization (): number { | |
8e5ca040 | 480 | const poolTimeCapacity = |
26ce26ca JB |
481 | (performance.now() - this.startTimestamp) * |
482 | (this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers) | |
afe0d5bf JB |
483 | const totalTasksRunTime = this.workerNodes.reduce( |
484 | (accumulator, workerNode) => | |
c63a35a0 | 485 | accumulator + (workerNode.usage.runTime.aggregate ?? 0), |
afe0d5bf JB |
486 | 0 |
487 | ) | |
488 | const totalTasksWaitTime = this.workerNodes.reduce( | |
489 | (accumulator, workerNode) => | |
c63a35a0 | 490 | accumulator + (workerNode.usage.waitTime.aggregate ?? 0), |
afe0d5bf JB |
491 | 0 |
492 | ) | |
8e5ca040 | 493 | return (totalTasksRunTime + totalTasksWaitTime) / poolTimeCapacity |
afe0d5bf JB |
494 | } |
495 | ||
8881ae32 | 496 | /** |
aa9eede8 | 497 | * The pool type. |
8881ae32 JB |
498 | * |
499 | * If it is `'dynamic'`, it provides the `max` property. | |
500 | */ | |
501 | protected abstract get type (): PoolType | |
502 | ||
184855e6 | 503 | /** |
aa9eede8 | 504 | * The worker type. |
184855e6 JB |
505 | */ |
506 | protected abstract get worker (): WorkerType | |
507 | ||
6b813701 JB |
508 | /** |
509 | * Checks if the worker id sent in the received message from a worker is valid. | |
510 | * | |
511 | * @param message - The received message. | |
512 | * @throws {@link https://nodejs.org/api/errors.html#class-error} If the worker id is invalid. | |
513 | */ | |
4d159167 | 514 | private checkMessageWorkerId (message: MessageValue<Data | Response>): void { |
310de0aa JB |
515 | if (message.workerId == null) { |
516 | throw new Error('Worker message received without worker id') | |
8e5a7cf9 | 517 | } else if (this.getWorkerNodeKeyByWorkerId(message.workerId) === -1) { |
21f710aa JB |
518 | throw new Error( |
519 | `Worker message received from unknown worker '${message.workerId}'` | |
520 | ) | |
521 | } | |
522 | } | |
523 | ||
aa9eede8 JB |
524 | /** |
525 | * Gets the worker node key given its worker id. | |
526 | * | |
527 | * @param workerId - The worker id. | |
aad6fb64 | 528 | * @returns The worker node key if the worker id is found in the pool worker nodes, `-1` otherwise. |
aa9eede8 | 529 | */ |
72ae84a2 | 530 | private getWorkerNodeKeyByWorkerId (workerId: number | undefined): number { |
aad6fb64 | 531 | return this.workerNodes.findIndex( |
041dc05b | 532 | workerNode => workerNode.info.id === workerId |
aad6fb64 | 533 | ) |
aa9eede8 JB |
534 | } |
535 | ||
afc003b2 | 536 | /** @inheritDoc */ |
a35560ba | 537 | public setWorkerChoiceStrategy ( |
59219cbb JB |
538 | workerChoiceStrategy: WorkerChoiceStrategy, |
539 | workerChoiceStrategyOptions?: WorkerChoiceStrategyOptions | |
a35560ba | 540 | ): void { |
bde6b5d7 | 541 | checkValidWorkerChoiceStrategy(workerChoiceStrategy) |
b98ec2e6 | 542 | this.opts.workerChoiceStrategy = workerChoiceStrategy |
c63a35a0 | 543 | this.workerChoiceStrategyContext?.setWorkerChoiceStrategy( |
b6b32453 JB |
544 | this.opts.workerChoiceStrategy |
545 | ) | |
546 | if (workerChoiceStrategyOptions != null) { | |
547 | this.setWorkerChoiceStrategyOptions(workerChoiceStrategyOptions) | |
548 | } | |
aa9eede8 | 549 | for (const [workerNodeKey, workerNode] of this.workerNodes.entries()) { |
4b628b48 | 550 | workerNode.resetUsage() |
9edb9717 | 551 | this.sendStatisticsMessageToWorker(workerNodeKey) |
59219cbb | 552 | } |
a20f0ba5 JB |
553 | } |
554 | ||
555 | /** @inheritDoc */ | |
556 | public setWorkerChoiceStrategyOptions ( | |
c63a35a0 | 557 | workerChoiceStrategyOptions: WorkerChoiceStrategyOptions | undefined |
a20f0ba5 | 558 | ): void { |
0d80593b | 559 | this.checkValidWorkerChoiceStrategyOptions(workerChoiceStrategyOptions) |
26ce26ca JB |
560 | if (workerChoiceStrategyOptions != null) { |
561 | this.opts.workerChoiceStrategyOptions = workerChoiceStrategyOptions | |
8990357d | 562 | } |
c63a35a0 | 563 | this.workerChoiceStrategyContext?.setOptions( |
a20f0ba5 | 564 | this.opts.workerChoiceStrategyOptions |
a35560ba S |
565 | ) |
566 | } | |
567 | ||
a20f0ba5 | 568 | /** @inheritDoc */ |
8f52842f JB |
569 | public enableTasksQueue ( |
570 | enable: boolean, | |
571 | tasksQueueOptions?: TasksQueueOptions | |
572 | ): void { | |
a20f0ba5 | 573 | if (this.opts.enableTasksQueue === true && !enable) { |
d6ca1416 JB |
574 | this.unsetTaskStealing() |
575 | this.unsetTasksStealingOnBackPressure() | |
ef41a6e6 | 576 | this.flushTasksQueues() |
a20f0ba5 JB |
577 | } |
578 | this.opts.enableTasksQueue = enable | |
c63a35a0 | 579 | this.setTasksQueueOptions(tasksQueueOptions) |
a20f0ba5 JB |
580 | } |
581 | ||
582 | /** @inheritDoc */ | |
c63a35a0 JB |
583 | public setTasksQueueOptions ( |
584 | tasksQueueOptions: TasksQueueOptions | undefined | |
585 | ): void { | |
a20f0ba5 | 586 | if (this.opts.enableTasksQueue === true) { |
bde6b5d7 | 587 | checkValidTasksQueueOptions(tasksQueueOptions) |
8f52842f JB |
588 | this.opts.tasksQueueOptions = |
589 | this.buildTasksQueueOptions(tasksQueueOptions) | |
67f3f2d6 JB |
590 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
591 | this.setTasksQueueSize(this.opts.tasksQueueOptions.size!) | |
d6ca1416 | 592 | if (this.opts.tasksQueueOptions.taskStealing === true) { |
9f99eb9b | 593 | this.unsetTaskStealing() |
d6ca1416 JB |
594 | this.setTaskStealing() |
595 | } else { | |
596 | this.unsetTaskStealing() | |
597 | } | |
598 | if (this.opts.tasksQueueOptions.tasksStealingOnBackPressure === true) { | |
9f99eb9b | 599 | this.unsetTasksStealingOnBackPressure() |
d6ca1416 JB |
600 | this.setTasksStealingOnBackPressure() |
601 | } else { | |
602 | this.unsetTasksStealingOnBackPressure() | |
603 | } | |
5baee0d7 | 604 | } else if (this.opts.tasksQueueOptions != null) { |
a20f0ba5 JB |
605 | delete this.opts.tasksQueueOptions |
606 | } | |
607 | } | |
608 | ||
9b38ab2d | 609 | private buildTasksQueueOptions ( |
c63a35a0 | 610 | tasksQueueOptions: TasksQueueOptions | undefined |
9b38ab2d JB |
611 | ): TasksQueueOptions { |
612 | return { | |
26ce26ca JB |
613 | ...getDefaultTasksQueueOptions( |
614 | this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers | |
615 | ), | |
9b38ab2d JB |
616 | ...tasksQueueOptions |
617 | } | |
618 | } | |
619 | ||
5b49e864 | 620 | private setTasksQueueSize (size: number): void { |
20c6f652 | 621 | for (const workerNode of this.workerNodes) { |
ff3f866a | 622 | workerNode.tasksQueueBackPressureSize = size |
20c6f652 JB |
623 | } |
624 | } | |
625 | ||
d6ca1416 JB |
626 | private setTaskStealing (): void { |
627 | for (const [workerNodeKey] of this.workerNodes.entries()) { | |
e44639e9 | 628 | this.workerNodes[workerNodeKey].on('idle', this.handleWorkerNodeIdleEvent) |
d6ca1416 JB |
629 | } |
630 | } | |
631 | ||
632 | private unsetTaskStealing (): void { | |
633 | for (const [workerNodeKey] of this.workerNodes.entries()) { | |
e1c2dba7 | 634 | this.workerNodes[workerNodeKey].off( |
e44639e9 JB |
635 | 'idle', |
636 | this.handleWorkerNodeIdleEvent | |
9f95d5eb | 637 | ) |
d6ca1416 JB |
638 | } |
639 | } | |
640 | ||
641 | private setTasksStealingOnBackPressure (): void { | |
642 | for (const [workerNodeKey] of this.workerNodes.entries()) { | |
e1c2dba7 | 643 | this.workerNodes[workerNodeKey].on( |
b5e75be8 | 644 | 'backPressure', |
e44639e9 | 645 | this.handleWorkerNodeBackPressureEvent |
9f95d5eb | 646 | ) |
d6ca1416 JB |
647 | } |
648 | } | |
649 | ||
650 | private unsetTasksStealingOnBackPressure (): void { | |
651 | for (const [workerNodeKey] of this.workerNodes.entries()) { | |
e1c2dba7 | 652 | this.workerNodes[workerNodeKey].off( |
b5e75be8 | 653 | 'backPressure', |
e44639e9 | 654 | this.handleWorkerNodeBackPressureEvent |
9f95d5eb | 655 | ) |
d6ca1416 JB |
656 | } |
657 | } | |
658 | ||
c319c66b JB |
659 | /** |
660 | * Whether the pool is full or not. | |
661 | * | |
662 | * The pool filling boolean status. | |
663 | */ | |
dea903a8 | 664 | protected get full (): boolean { |
26ce26ca JB |
665 | return ( |
666 | this.workerNodes.length >= | |
667 | (this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers) | |
668 | ) | |
dea903a8 | 669 | } |
c2ade475 | 670 | |
c319c66b JB |
671 | /** |
672 | * Whether the pool is busy or not. | |
673 | * | |
674 | * The pool busyness boolean status. | |
675 | */ | |
676 | protected abstract get busy (): boolean | |
7c0ba920 | 677 | |
6c6afb84 | 678 | /** |
3d76750a | 679 | * Whether worker nodes are executing concurrently their tasks quota or not. |
6c6afb84 JB |
680 | * |
681 | * @returns Worker nodes busyness boolean status. | |
682 | */ | |
c2ade475 | 683 | protected internalBusy (): boolean { |
3d76750a JB |
684 | if (this.opts.enableTasksQueue === true) { |
685 | return ( | |
686 | this.workerNodes.findIndex( | |
041dc05b | 687 | workerNode => |
3d76750a JB |
688 | workerNode.info.ready && |
689 | workerNode.usage.tasks.executing < | |
67f3f2d6 JB |
690 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
691 | this.opts.tasksQueueOptions!.concurrency! | |
3d76750a JB |
692 | ) === -1 |
693 | ) | |
3d76750a | 694 | } |
419e8121 JB |
695 | return ( |
696 | this.workerNodes.findIndex( | |
697 | workerNode => | |
698 | workerNode.info.ready && workerNode.usage.tasks.executing === 0 | |
699 | ) === -1 | |
700 | ) | |
cb70b19d JB |
701 | } |
702 | ||
42c677c1 JB |
703 | private isWorkerNodeBusy (workerNodeKey: number): boolean { |
704 | if (this.opts.enableTasksQueue === true) { | |
705 | return ( | |
706 | this.workerNodes[workerNodeKey].usage.tasks.executing >= | |
67f3f2d6 JB |
707 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
708 | this.opts.tasksQueueOptions!.concurrency! | |
42c677c1 JB |
709 | ) |
710 | } | |
711 | return this.workerNodes[workerNodeKey].usage.tasks.executing > 0 | |
712 | } | |
713 | ||
e81c38f2 | 714 | private async sendTaskFunctionOperationToWorker ( |
72ae84a2 JB |
715 | workerNodeKey: number, |
716 | message: MessageValue<Data> | |
717 | ): Promise<boolean> { | |
72ae84a2 | 718 | return await new Promise<boolean>((resolve, reject) => { |
ae036c3e JB |
719 | const taskFunctionOperationListener = ( |
720 | message: MessageValue<Response> | |
721 | ): void => { | |
722 | this.checkMessageWorkerId(message) | |
1851fed0 | 723 | const workerId = this.getWorkerInfo(workerNodeKey)?.id |
72ae84a2 | 724 | if ( |
ae036c3e JB |
725 | message.taskFunctionOperationStatus != null && |
726 | message.workerId === workerId | |
72ae84a2 | 727 | ) { |
ae036c3e JB |
728 | if (message.taskFunctionOperationStatus) { |
729 | resolve(true) | |
c63a35a0 | 730 | } else { |
ae036c3e JB |
731 | reject( |
732 | new Error( | |
c63a35a0 | 733 | `Task function operation '${message.taskFunctionOperation}' failed on worker ${message.workerId} with error: '${message.workerError?.message}'` |
ae036c3e | 734 | ) |
72ae84a2 | 735 | ) |
ae036c3e JB |
736 | } |
737 | this.deregisterWorkerMessageListener( | |
738 | this.getWorkerNodeKeyByWorkerId(message.workerId), | |
739 | taskFunctionOperationListener | |
72ae84a2 JB |
740 | ) |
741 | } | |
ae036c3e JB |
742 | } |
743 | this.registerWorkerMessageListener( | |
744 | workerNodeKey, | |
745 | taskFunctionOperationListener | |
746 | ) | |
72ae84a2 JB |
747 | this.sendToWorker(workerNodeKey, message) |
748 | }) | |
749 | } | |
750 | ||
751 | private async sendTaskFunctionOperationToWorkers ( | |
adee6053 | 752 | message: MessageValue<Data> |
e81c38f2 JB |
753 | ): Promise<boolean> { |
754 | return await new Promise<boolean>((resolve, reject) => { | |
ae036c3e JB |
755 | const responsesReceived = new Array<MessageValue<Response>>() |
756 | const taskFunctionOperationsListener = ( | |
757 | message: MessageValue<Response> | |
758 | ): void => { | |
759 | this.checkMessageWorkerId(message) | |
760 | if (message.taskFunctionOperationStatus != null) { | |
761 | responsesReceived.push(message) | |
762 | if (responsesReceived.length === this.workerNodes.length) { | |
e81c38f2 | 763 | if ( |
e81c38f2 JB |
764 | responsesReceived.every( |
765 | message => message.taskFunctionOperationStatus === true | |
766 | ) | |
767 | ) { | |
768 | resolve(true) | |
769 | } else if ( | |
e81c38f2 JB |
770 | responsesReceived.some( |
771 | message => message.taskFunctionOperationStatus === false | |
772 | ) | |
773 | ) { | |
b0b55f57 JB |
774 | const errorResponse = responsesReceived.find( |
775 | response => response.taskFunctionOperationStatus === false | |
776 | ) | |
e81c38f2 JB |
777 | reject( |
778 | new Error( | |
b0b55f57 | 779 | `Task function operation '${ |
e81c38f2 | 780 | message.taskFunctionOperation as string |
c63a35a0 JB |
781 | }' failed on worker ${errorResponse?.workerId} with error: '${ |
782 | errorResponse?.workerError?.message | |
b0b55f57 | 783 | }'` |
e81c38f2 JB |
784 | ) |
785 | ) | |
786 | } | |
ae036c3e JB |
787 | this.deregisterWorkerMessageListener( |
788 | this.getWorkerNodeKeyByWorkerId(message.workerId), | |
789 | taskFunctionOperationsListener | |
790 | ) | |
e81c38f2 | 791 | } |
ae036c3e JB |
792 | } |
793 | } | |
794 | for (const [workerNodeKey] of this.workerNodes.entries()) { | |
795 | this.registerWorkerMessageListener( | |
796 | workerNodeKey, | |
797 | taskFunctionOperationsListener | |
798 | ) | |
72ae84a2 | 799 | this.sendToWorker(workerNodeKey, message) |
e81c38f2 JB |
800 | } |
801 | }) | |
6703b9f4 JB |
802 | } |
803 | ||
804 | /** @inheritDoc */ | |
805 | public hasTaskFunction (name: string): boolean { | |
edbc15c6 JB |
806 | for (const workerNode of this.workerNodes) { |
807 | if ( | |
808 | Array.isArray(workerNode.info.taskFunctionNames) && | |
809 | workerNode.info.taskFunctionNames.includes(name) | |
810 | ) { | |
811 | return true | |
812 | } | |
813 | } | |
814 | return false | |
6703b9f4 JB |
815 | } |
816 | ||
817 | /** @inheritDoc */ | |
e81c38f2 JB |
818 | public async addTaskFunction ( |
819 | name: string, | |
3feeab69 | 820 | fn: TaskFunction<Data, Response> |
e81c38f2 | 821 | ): Promise<boolean> { |
3feeab69 JB |
822 | if (typeof name !== 'string') { |
823 | throw new TypeError('name argument must be a string') | |
824 | } | |
825 | if (typeof name === 'string' && name.trim().length === 0) { | |
826 | throw new TypeError('name argument must not be an empty string') | |
827 | } | |
828 | if (typeof fn !== 'function') { | |
829 | throw new TypeError('fn argument must be a function') | |
830 | } | |
adee6053 | 831 | const opResult = await this.sendTaskFunctionOperationToWorkers({ |
6703b9f4 JB |
832 | taskFunctionOperation: 'add', |
833 | taskFunctionName: name, | |
3feeab69 | 834 | taskFunction: fn.toString() |
6703b9f4 | 835 | }) |
adee6053 JB |
836 | this.taskFunctions.set(name, fn) |
837 | return opResult | |
6703b9f4 JB |
838 | } |
839 | ||
840 | /** @inheritDoc */ | |
e81c38f2 | 841 | public async removeTaskFunction (name: string): Promise<boolean> { |
9eae3c69 JB |
842 | if (!this.taskFunctions.has(name)) { |
843 | throw new Error( | |
16248b23 | 844 | 'Cannot remove a task function not handled on the pool side' |
9eae3c69 JB |
845 | ) |
846 | } | |
adee6053 | 847 | const opResult = await this.sendTaskFunctionOperationToWorkers({ |
6703b9f4 JB |
848 | taskFunctionOperation: 'remove', |
849 | taskFunctionName: name | |
850 | }) | |
adee6053 JB |
851 | this.deleteTaskFunctionWorkerUsages(name) |
852 | this.taskFunctions.delete(name) | |
853 | return opResult | |
6703b9f4 JB |
854 | } |
855 | ||
90d7d101 | 856 | /** @inheritDoc */ |
6703b9f4 | 857 | public listTaskFunctionNames (): string[] { |
f2dbbf95 JB |
858 | for (const workerNode of this.workerNodes) { |
859 | if ( | |
6703b9f4 JB |
860 | Array.isArray(workerNode.info.taskFunctionNames) && |
861 | workerNode.info.taskFunctionNames.length > 0 | |
f2dbbf95 | 862 | ) { |
6703b9f4 | 863 | return workerNode.info.taskFunctionNames |
f2dbbf95 | 864 | } |
90d7d101 | 865 | } |
f2dbbf95 | 866 | return [] |
90d7d101 JB |
867 | } |
868 | ||
6703b9f4 | 869 | /** @inheritDoc */ |
e81c38f2 | 870 | public async setDefaultTaskFunction (name: string): Promise<boolean> { |
72ae84a2 | 871 | return await this.sendTaskFunctionOperationToWorkers({ |
6703b9f4 JB |
872 | taskFunctionOperation: 'default', |
873 | taskFunctionName: name | |
874 | }) | |
6703b9f4 JB |
875 | } |
876 | ||
adee6053 JB |
877 | private deleteTaskFunctionWorkerUsages (name: string): void { |
878 | for (const workerNode of this.workerNodes) { | |
879 | workerNode.deleteTaskFunctionWorkerUsage(name) | |
880 | } | |
881 | } | |
882 | ||
375f7504 JB |
883 | private shallExecuteTask (workerNodeKey: number): boolean { |
884 | return ( | |
885 | this.tasksQueueSize(workerNodeKey) === 0 && | |
886 | this.workerNodes[workerNodeKey].usage.tasks.executing < | |
67f3f2d6 JB |
887 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
888 | this.opts.tasksQueueOptions!.concurrency! | |
375f7504 JB |
889 | ) |
890 | } | |
891 | ||
afc003b2 | 892 | /** @inheritDoc */ |
7d91a8cd JB |
893 | public async execute ( |
894 | data?: Data, | |
895 | name?: string, | |
896 | transferList?: TransferListItem[] | |
897 | ): Promise<Response> { | |
52b71763 | 898 | return await new Promise<Response>((resolve, reject) => { |
15b176e0 | 899 | if (!this.started) { |
47352846 | 900 | reject(new Error('Cannot execute a task on not started pool')) |
9d2d0da1 | 901 | return |
15b176e0 | 902 | } |
711623b8 JB |
903 | if (this.destroying) { |
904 | reject(new Error('Cannot execute a task on destroying pool')) | |
905 | return | |
906 | } | |
7d91a8cd JB |
907 | if (name != null && typeof name !== 'string') { |
908 | reject(new TypeError('name argument must be a string')) | |
9d2d0da1 | 909 | return |
7d91a8cd | 910 | } |
90d7d101 JB |
911 | if ( |
912 | name != null && | |
913 | typeof name === 'string' && | |
914 | name.trim().length === 0 | |
915 | ) { | |
f58b60b9 | 916 | reject(new TypeError('name argument must not be an empty string')) |
9d2d0da1 | 917 | return |
90d7d101 | 918 | } |
b558f6b5 JB |
919 | if (transferList != null && !Array.isArray(transferList)) { |
920 | reject(new TypeError('transferList argument must be an array')) | |
9d2d0da1 | 921 | return |
b558f6b5 JB |
922 | } |
923 | const timestamp = performance.now() | |
924 | const workerNodeKey = this.chooseWorkerNode() | |
501aea93 | 925 | const task: Task<Data> = { |
52b71763 JB |
926 | name: name ?? DEFAULT_TASK_NAME, |
927 | // eslint-disable-next-line @typescript-eslint/consistent-type-assertions | |
928 | data: data ?? ({} as Data), | |
7d91a8cd | 929 | transferList, |
52b71763 | 930 | timestamp, |
7629bdf1 | 931 | taskId: randomUUID() |
52b71763 | 932 | } |
67f3f2d6 JB |
933 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
934 | this.promiseResponseMap.set(task.taskId!, { | |
2e81254d JB |
935 | resolve, |
936 | reject, | |
f18fd12b JB |
937 | workerNodeKey, |
938 | ...(this.emitter != null && { | |
939 | asyncResource: new AsyncResource('poolifier:task', { | |
940 | triggerAsyncId: this.emitter.asyncId, | |
941 | requireManualDestroy: true | |
942 | }) | |
943 | }) | |
2e81254d | 944 | }) |
52b71763 | 945 | if ( |
4e377863 JB |
946 | this.opts.enableTasksQueue === false || |
947 | (this.opts.enableTasksQueue === true && | |
375f7504 | 948 | this.shallExecuteTask(workerNodeKey)) |
52b71763 | 949 | ) { |
501aea93 | 950 | this.executeTask(workerNodeKey, task) |
4e377863 JB |
951 | } else { |
952 | this.enqueueTask(workerNodeKey, task) | |
52b71763 | 953 | } |
2e81254d | 954 | }) |
280c2a77 | 955 | } |
c97c7edb | 956 | |
60dc0a9c JB |
957 | /** |
958 | * Starts the minimum number of workers. | |
959 | */ | |
960 | private startMinimumNumberOfWorkers (): void { | |
b362a929 | 961 | this.startingMinimumNumberOfWorkers = true |
60dc0a9c JB |
962 | while ( |
963 | this.workerNodes.reduce( | |
964 | (accumulator, workerNode) => | |
965 | !workerNode.info.dynamic ? accumulator + 1 : accumulator, | |
966 | 0 | |
967 | ) < this.minimumNumberOfWorkers | |
968 | ) { | |
969 | this.createAndSetupWorkerNode() | |
970 | } | |
b362a929 | 971 | this.startingMinimumNumberOfWorkers = false |
60dc0a9c JB |
972 | } |
973 | ||
47352846 JB |
974 | /** @inheritdoc */ |
975 | public start (): void { | |
711623b8 JB |
976 | if (this.started) { |
977 | throw new Error('Cannot start an already started pool') | |
978 | } | |
979 | if (this.starting) { | |
980 | throw new Error('Cannot start an already starting pool') | |
981 | } | |
982 | if (this.destroying) { | |
983 | throw new Error('Cannot start a destroying pool') | |
984 | } | |
47352846 | 985 | this.starting = true |
60dc0a9c | 986 | this.startMinimumNumberOfWorkers() |
47352846 JB |
987 | this.starting = false |
988 | this.started = true | |
989 | } | |
990 | ||
afc003b2 | 991 | /** @inheritDoc */ |
c97c7edb | 992 | public async destroy (): Promise<void> { |
711623b8 JB |
993 | if (!this.started) { |
994 | throw new Error('Cannot destroy an already destroyed pool') | |
995 | } | |
996 | if (this.starting) { | |
997 | throw new Error('Cannot destroy an starting pool') | |
998 | } | |
999 | if (this.destroying) { | |
1000 | throw new Error('Cannot destroy an already destroying pool') | |
1001 | } | |
1002 | this.destroying = true | |
1fbcaa7c | 1003 | await Promise.all( |
14c39df1 | 1004 | this.workerNodes.map(async (_workerNode, workerNodeKey) => { |
aa9eede8 | 1005 | await this.destroyWorkerNode(workerNodeKey) |
1fbcaa7c JB |
1006 | }) |
1007 | ) | |
33e6bb4c | 1008 | this.emitter?.emit(PoolEvents.destroy, this.info) |
f80125ca | 1009 | this.emitter?.emitDestroy() |
55082af9 | 1010 | this.readyEventEmitted = false |
711623b8 | 1011 | this.destroying = false |
15b176e0 | 1012 | this.started = false |
c97c7edb S |
1013 | } |
1014 | ||
26ce26ca | 1015 | private async sendKillMessageToWorker (workerNodeKey: number): Promise<void> { |
9edb9717 | 1016 | await new Promise<void>((resolve, reject) => { |
c63a35a0 JB |
1017 | // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition |
1018 | if (this.workerNodes[workerNodeKey] == null) { | |
ad3836ed | 1019 | resolve() |
85b2561d JB |
1020 | return |
1021 | } | |
ae036c3e JB |
1022 | const killMessageListener = (message: MessageValue<Response>): void => { |
1023 | this.checkMessageWorkerId(message) | |
1e3214b6 JB |
1024 | if (message.kill === 'success') { |
1025 | resolve() | |
1026 | } else if (message.kill === 'failure') { | |
72ae84a2 JB |
1027 | reject( |
1028 | new Error( | |
c63a35a0 | 1029 | `Kill message handling failed on worker ${message.workerId}` |
72ae84a2 JB |
1030 | ) |
1031 | ) | |
1e3214b6 | 1032 | } |
ae036c3e | 1033 | } |
51d9cfbd | 1034 | // FIXME: should be registered only once |
ae036c3e | 1035 | this.registerWorkerMessageListener(workerNodeKey, killMessageListener) |
72ae84a2 | 1036 | this.sendToWorker(workerNodeKey, { kill: true }) |
1e3214b6 | 1037 | }) |
1e3214b6 JB |
1038 | } |
1039 | ||
4a6952ff | 1040 | /** |
aa9eede8 | 1041 | * Terminates the worker node given its worker node key. |
4a6952ff | 1042 | * |
aa9eede8 | 1043 | * @param workerNodeKey - The worker node key. |
4a6952ff | 1044 | */ |
07e0c9e5 JB |
1045 | protected async destroyWorkerNode (workerNodeKey: number): Promise<void> { |
1046 | this.flagWorkerNodeAsNotReady(workerNodeKey) | |
87347ea8 | 1047 | const flushedTasks = this.flushTasksQueue(workerNodeKey) |
07e0c9e5 | 1048 | const workerNode = this.workerNodes[workerNodeKey] |
32b141fd JB |
1049 | await waitWorkerNodeEvents( |
1050 | workerNode, | |
1051 | 'taskFinished', | |
1052 | flushedTasks, | |
1053 | this.opts.tasksQueueOptions?.tasksFinishedTimeout ?? | |
26ce26ca JB |
1054 | getDefaultTasksQueueOptions( |
1055 | this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers | |
1056 | ).tasksFinishedTimeout | |
32b141fd | 1057 | ) |
07e0c9e5 JB |
1058 | await this.sendKillMessageToWorker(workerNodeKey) |
1059 | await workerNode.terminate() | |
1060 | } | |
c97c7edb | 1061 | |
729c563d | 1062 | /** |
6677a3d3 JB |
1063 | * Setup hook to execute code before worker nodes are created in the abstract constructor. |
1064 | * Can be overridden. | |
afc003b2 JB |
1065 | * |
1066 | * @virtual | |
729c563d | 1067 | */ |
280c2a77 | 1068 | protected setupHook (): void { |
965df41c | 1069 | /* Intentionally empty */ |
280c2a77 | 1070 | } |
c97c7edb | 1071 | |
729c563d | 1072 | /** |
280c2a77 S |
1073 | * Should return whether the worker is the main worker or not. |
1074 | */ | |
1075 | protected abstract isMain (): boolean | |
1076 | ||
1077 | /** | |
2e81254d | 1078 | * Hook executed before the worker task execution. |
bf9549ae | 1079 | * Can be overridden. |
729c563d | 1080 | * |
f06e48d8 | 1081 | * @param workerNodeKey - The worker node key. |
1c6fe997 | 1082 | * @param task - The task to execute. |
729c563d | 1083 | */ |
1c6fe997 JB |
1084 | protected beforeTaskExecutionHook ( |
1085 | workerNodeKey: number, | |
1086 | task: Task<Data> | |
1087 | ): void { | |
c63a35a0 | 1088 | // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition |
efabc98d | 1089 | if (this.workerNodes[workerNodeKey]?.usage != null) { |
94407def JB |
1090 | const workerUsage = this.workerNodes[workerNodeKey].usage |
1091 | ++workerUsage.tasks.executing | |
c329fd41 JB |
1092 | updateWaitTimeWorkerUsage( |
1093 | this.workerChoiceStrategyContext, | |
1094 | workerUsage, | |
1095 | task | |
1096 | ) | |
94407def JB |
1097 | } |
1098 | if ( | |
1099 | this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) && | |
67f3f2d6 JB |
1100 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1101 | this.workerNodes[workerNodeKey].getTaskFunctionWorkerUsage(task.name!) != | |
1102 | null | |
94407def | 1103 | ) { |
67f3f2d6 | 1104 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
db0e38ee | 1105 | const taskFunctionWorkerUsage = this.workerNodes[ |
b558f6b5 | 1106 | workerNodeKey |
67f3f2d6 JB |
1107 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1108 | ].getTaskFunctionWorkerUsage(task.name!)! | |
5623b8d5 | 1109 | ++taskFunctionWorkerUsage.tasks.executing |
c329fd41 JB |
1110 | updateWaitTimeWorkerUsage( |
1111 | this.workerChoiceStrategyContext, | |
1112 | taskFunctionWorkerUsage, | |
1113 | task | |
1114 | ) | |
b558f6b5 | 1115 | } |
c97c7edb S |
1116 | } |
1117 | ||
c01733f1 | 1118 | /** |
2e81254d | 1119 | * Hook executed after the worker task execution. |
bf9549ae | 1120 | * Can be overridden. |
c01733f1 | 1121 | * |
501aea93 | 1122 | * @param workerNodeKey - The worker node key. |
38e795c1 | 1123 | * @param message - The received message. |
c01733f1 | 1124 | */ |
2e81254d | 1125 | protected afterTaskExecutionHook ( |
501aea93 | 1126 | workerNodeKey: number, |
2740a743 | 1127 | message: MessageValue<Response> |
bf9549ae | 1128 | ): void { |
c329fd41 | 1129 | let needWorkerChoiceStrategyUpdate = false |
c63a35a0 | 1130 | // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition |
efabc98d | 1131 | if (this.workerNodes[workerNodeKey]?.usage != null) { |
94407def | 1132 | const workerUsage = this.workerNodes[workerNodeKey].usage |
c329fd41 JB |
1133 | updateTaskStatisticsWorkerUsage(workerUsage, message) |
1134 | updateRunTimeWorkerUsage( | |
1135 | this.workerChoiceStrategyContext, | |
1136 | workerUsage, | |
1137 | message | |
1138 | ) | |
1139 | updateEluWorkerUsage( | |
1140 | this.workerChoiceStrategyContext, | |
1141 | workerUsage, | |
1142 | message | |
1143 | ) | |
1144 | needWorkerChoiceStrategyUpdate = true | |
94407def JB |
1145 | } |
1146 | if ( | |
1147 | this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) && | |
1148 | this.workerNodes[workerNodeKey].getTaskFunctionWorkerUsage( | |
67f3f2d6 JB |
1149 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1150 | message.taskPerformance!.name | |
94407def JB |
1151 | ) != null |
1152 | ) { | |
67f3f2d6 | 1153 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
db0e38ee | 1154 | const taskFunctionWorkerUsage = this.workerNodes[ |
b558f6b5 | 1155 | workerNodeKey |
67f3f2d6 JB |
1156 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1157 | ].getTaskFunctionWorkerUsage(message.taskPerformance!.name)! | |
c329fd41 JB |
1158 | updateTaskStatisticsWorkerUsage(taskFunctionWorkerUsage, message) |
1159 | updateRunTimeWorkerUsage( | |
1160 | this.workerChoiceStrategyContext, | |
1161 | taskFunctionWorkerUsage, | |
1162 | message | |
1163 | ) | |
1164 | updateEluWorkerUsage( | |
1165 | this.workerChoiceStrategyContext, | |
1166 | taskFunctionWorkerUsage, | |
1167 | message | |
1168 | ) | |
1169 | needWorkerChoiceStrategyUpdate = true | |
1170 | } | |
1171 | if (needWorkerChoiceStrategyUpdate) { | |
c63a35a0 | 1172 | this.workerChoiceStrategyContext?.update(workerNodeKey) |
b558f6b5 JB |
1173 | } |
1174 | } | |
1175 | ||
db0e38ee JB |
1176 | /** |
1177 | * Whether the worker node shall update its task function worker usage or not. | |
1178 | * | |
1179 | * @param workerNodeKey - The worker node key. | |
1180 | * @returns `true` if the worker node shall update its task function worker usage, `false` otherwise. | |
1181 | */ | |
1182 | private shallUpdateTaskFunctionWorkerUsage (workerNodeKey: number): boolean { | |
a5d15204 | 1183 | const workerInfo = this.getWorkerInfo(workerNodeKey) |
b558f6b5 | 1184 | return ( |
1851fed0 | 1185 | workerInfo != null && |
6703b9f4 JB |
1186 | Array.isArray(workerInfo.taskFunctionNames) && |
1187 | workerInfo.taskFunctionNames.length > 2 | |
b558f6b5 | 1188 | ) |
f1c06930 JB |
1189 | } |
1190 | ||
280c2a77 | 1191 | /** |
f06e48d8 | 1192 | * Chooses a worker node for the next task. |
280c2a77 | 1193 | * |
6c6afb84 | 1194 | * The default worker choice strategy uses a round robin algorithm to distribute the tasks. |
280c2a77 | 1195 | * |
aa9eede8 | 1196 | * @returns The chosen worker node key |
280c2a77 | 1197 | */ |
6c6afb84 | 1198 | private chooseWorkerNode (): number { |
930dcf12 | 1199 | if (this.shallCreateDynamicWorker()) { |
aa9eede8 | 1200 | const workerNodeKey = this.createAndSetupDynamicWorkerNode() |
6c6afb84 | 1201 | if ( |
c63a35a0 JB |
1202 | this.workerChoiceStrategyContext?.getStrategyPolicy() |
1203 | .dynamicWorkerUsage === true | |
6c6afb84 | 1204 | ) { |
aa9eede8 | 1205 | return workerNodeKey |
6c6afb84 | 1206 | } |
17393ac8 | 1207 | } |
c63a35a0 | 1208 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
5d240702 | 1209 | return this.workerChoiceStrategyContext!.execute() |
930dcf12 JB |
1210 | } |
1211 | ||
6c6afb84 JB |
1212 | /** |
1213 | * Conditions for dynamic worker creation. | |
1214 | * | |
1215 | * @returns Whether to create a dynamic worker or not. | |
1216 | */ | |
9d9fb7b6 | 1217 | protected abstract shallCreateDynamicWorker (): boolean |
c97c7edb | 1218 | |
280c2a77 | 1219 | /** |
aa9eede8 | 1220 | * Sends a message to worker given its worker node key. |
280c2a77 | 1221 | * |
aa9eede8 | 1222 | * @param workerNodeKey - The worker node key. |
38e795c1 | 1223 | * @param message - The message. |
7d91a8cd | 1224 | * @param transferList - The optional array of transferable objects. |
280c2a77 S |
1225 | */ |
1226 | protected abstract sendToWorker ( | |
aa9eede8 | 1227 | workerNodeKey: number, |
7d91a8cd JB |
1228 | message: MessageValue<Data>, |
1229 | transferList?: TransferListItem[] | |
280c2a77 S |
1230 | ): void |
1231 | ||
4a6952ff | 1232 | /** |
aa9eede8 | 1233 | * Creates a new, completely set up worker node. |
4a6952ff | 1234 | * |
aa9eede8 | 1235 | * @returns New, completely set up worker node key. |
4a6952ff | 1236 | */ |
aa9eede8 | 1237 | protected createAndSetupWorkerNode (): number { |
c3719753 JB |
1238 | const workerNode = this.createWorkerNode() |
1239 | workerNode.registerWorkerEventHandler( | |
1240 | 'online', | |
1241 | this.opts.onlineHandler ?? EMPTY_FUNCTION | |
1242 | ) | |
1243 | workerNode.registerWorkerEventHandler( | |
1244 | 'message', | |
1245 | this.opts.messageHandler ?? EMPTY_FUNCTION | |
1246 | ) | |
1247 | workerNode.registerWorkerEventHandler( | |
1248 | 'error', | |
1249 | this.opts.errorHandler ?? EMPTY_FUNCTION | |
1250 | ) | |
b271fce0 | 1251 | workerNode.registerOnceWorkerEventHandler('error', (error: Error) => { |
07e0c9e5 | 1252 | workerNode.info.ready = false |
2a69b8c5 | 1253 | this.emitter?.emit(PoolEvents.error, error) |
15b176e0 | 1254 | if ( |
b6bfca01 | 1255 | this.started && |
711623b8 | 1256 | !this.destroying && |
9b38ab2d | 1257 | this.opts.restartWorkerOnError === true |
15b176e0 | 1258 | ) { |
07e0c9e5 | 1259 | if (workerNode.info.dynamic) { |
aa9eede8 | 1260 | this.createAndSetupDynamicWorkerNode() |
b362a929 | 1261 | } else if (!this.startingMinimumNumberOfWorkers) { |
3d720596 | 1262 | this.startMinimumNumberOfWorkers() |
8a1260a3 | 1263 | } |
5baee0d7 | 1264 | } |
3c9123c7 JB |
1265 | if ( |
1266 | this.started && | |
1267 | !this.destroying && | |
1268 | this.opts.enableTasksQueue === true | |
1269 | ) { | |
9974369e | 1270 | this.redistributeQueuedTasks(this.workerNodes.indexOf(workerNode)) |
19dbc45b | 1271 | } |
b4f8aca8 | 1272 | // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition |
07f6f7b1 | 1273 | workerNode?.terminate().catch((error: unknown) => { |
07e0c9e5 JB |
1274 | this.emitter?.emit(PoolEvents.error, error) |
1275 | }) | |
5baee0d7 | 1276 | }) |
c3719753 JB |
1277 | workerNode.registerWorkerEventHandler( |
1278 | 'exit', | |
1279 | this.opts.exitHandler ?? EMPTY_FUNCTION | |
1280 | ) | |
1281 | workerNode.registerOnceWorkerEventHandler('exit', () => { | |
9974369e | 1282 | this.removeWorkerNode(workerNode) |
b362a929 JB |
1283 | if ( |
1284 | this.started && | |
1285 | !this.startingMinimumNumberOfWorkers && | |
1286 | !this.destroying | |
1287 | ) { | |
60dc0a9c JB |
1288 | this.startMinimumNumberOfWorkers() |
1289 | } | |
a974afa6 | 1290 | }) |
c3719753 | 1291 | const workerNodeKey = this.addWorkerNode(workerNode) |
aa9eede8 | 1292 | this.afterWorkerNodeSetup(workerNodeKey) |
aa9eede8 | 1293 | return workerNodeKey |
c97c7edb | 1294 | } |
be0676b3 | 1295 | |
930dcf12 | 1296 | /** |
aa9eede8 | 1297 | * Creates a new, completely set up dynamic worker node. |
930dcf12 | 1298 | * |
aa9eede8 | 1299 | * @returns New, completely set up dynamic worker node key. |
930dcf12 | 1300 | */ |
aa9eede8 JB |
1301 | protected createAndSetupDynamicWorkerNode (): number { |
1302 | const workerNodeKey = this.createAndSetupWorkerNode() | |
041dc05b | 1303 | this.registerWorkerMessageListener(workerNodeKey, message => { |
4d159167 | 1304 | this.checkMessageWorkerId(message) |
aa9eede8 JB |
1305 | const localWorkerNodeKey = this.getWorkerNodeKeyByWorkerId( |
1306 | message.workerId | |
aad6fb64 | 1307 | ) |
2b6b412f | 1308 | const workerUsage = this.workerNodes[localWorkerNodeKey]?.usage |
81c02522 | 1309 | // Kill message received from worker |
930dcf12 JB |
1310 | if ( |
1311 | isKillBehavior(KillBehaviors.HARD, message.kill) || | |
1e3214b6 | 1312 | (isKillBehavior(KillBehaviors.SOFT, message.kill) && |
7b56f532 | 1313 | ((this.opts.enableTasksQueue === false && |
aa9eede8 | 1314 | workerUsage.tasks.executing === 0) || |
7b56f532 | 1315 | (this.opts.enableTasksQueue === true && |
aa9eede8 JB |
1316 | workerUsage.tasks.executing === 0 && |
1317 | this.tasksQueueSize(localWorkerNodeKey) === 0))) | |
930dcf12 | 1318 | ) { |
f3827d5d | 1319 | // Flag the worker node as not ready immediately |
ae3ab61d | 1320 | this.flagWorkerNodeAsNotReady(localWorkerNodeKey) |
07f6f7b1 | 1321 | this.destroyWorkerNode(localWorkerNodeKey).catch((error: unknown) => { |
5270d253 JB |
1322 | this.emitter?.emit(PoolEvents.error, error) |
1323 | }) | |
930dcf12 JB |
1324 | } |
1325 | }) | |
aa9eede8 | 1326 | this.sendToWorker(workerNodeKey, { |
e9dd5b66 | 1327 | checkActive: true |
21f710aa | 1328 | }) |
72ae84a2 JB |
1329 | if (this.taskFunctions.size > 0) { |
1330 | for (const [taskFunctionName, taskFunction] of this.taskFunctions) { | |
1331 | this.sendTaskFunctionOperationToWorker(workerNodeKey, { | |
1332 | taskFunctionOperation: 'add', | |
1333 | taskFunctionName, | |
1334 | taskFunction: taskFunction.toString() | |
07f6f7b1 | 1335 | }).catch((error: unknown) => { |
72ae84a2 JB |
1336 | this.emitter?.emit(PoolEvents.error, error) |
1337 | }) | |
1338 | } | |
1339 | } | |
e44639e9 JB |
1340 | const workerNode = this.workerNodes[workerNodeKey] |
1341 | workerNode.info.dynamic = true | |
b1aae695 | 1342 | if ( |
c63a35a0 JB |
1343 | this.workerChoiceStrategyContext?.getStrategyPolicy() |
1344 | .dynamicWorkerReady === true || | |
1345 | this.workerChoiceStrategyContext?.getStrategyPolicy() | |
1346 | .dynamicWorkerUsage === true | |
b1aae695 | 1347 | ) { |
e44639e9 | 1348 | workerNode.info.ready = true |
b5e113f6 | 1349 | } |
33e6bb4c | 1350 | this.checkAndEmitDynamicWorkerCreationEvents() |
aa9eede8 | 1351 | return workerNodeKey |
930dcf12 JB |
1352 | } |
1353 | ||
a2ed5053 | 1354 | /** |
aa9eede8 | 1355 | * Registers a listener callback on the worker given its worker node key. |
a2ed5053 | 1356 | * |
aa9eede8 | 1357 | * @param workerNodeKey - The worker node key. |
a2ed5053 JB |
1358 | * @param listener - The message listener callback. |
1359 | */ | |
85aeb3f3 JB |
1360 | protected abstract registerWorkerMessageListener< |
1361 | Message extends Data | Response | |
aa9eede8 JB |
1362 | >( |
1363 | workerNodeKey: number, | |
1364 | listener: (message: MessageValue<Message>) => void | |
1365 | ): void | |
a2ed5053 | 1366 | |
ae036c3e JB |
1367 | /** |
1368 | * Registers once a listener callback on the worker given its worker node key. | |
1369 | * | |
1370 | * @param workerNodeKey - The worker node key. | |
1371 | * @param listener - The message listener callback. | |
1372 | */ | |
1373 | protected abstract registerOnceWorkerMessageListener< | |
1374 | Message extends Data | Response | |
1375 | >( | |
1376 | workerNodeKey: number, | |
1377 | listener: (message: MessageValue<Message>) => void | |
1378 | ): void | |
1379 | ||
1380 | /** | |
1381 | * Deregisters a listener callback on the worker given its worker node key. | |
1382 | * | |
1383 | * @param workerNodeKey - The worker node key. | |
1384 | * @param listener - The message listener callback. | |
1385 | */ | |
1386 | protected abstract deregisterWorkerMessageListener< | |
1387 | Message extends Data | Response | |
1388 | >( | |
1389 | workerNodeKey: number, | |
1390 | listener: (message: MessageValue<Message>) => void | |
1391 | ): void | |
1392 | ||
a2ed5053 | 1393 | /** |
aa9eede8 | 1394 | * Method hooked up after a worker node has been newly created. |
a2ed5053 JB |
1395 | * Can be overridden. |
1396 | * | |
aa9eede8 | 1397 | * @param workerNodeKey - The newly created worker node key. |
a2ed5053 | 1398 | */ |
aa9eede8 | 1399 | protected afterWorkerNodeSetup (workerNodeKey: number): void { |
a2ed5053 | 1400 | // Listen to worker messages. |
fcd39179 JB |
1401 | this.registerWorkerMessageListener( |
1402 | workerNodeKey, | |
3a776b6d | 1403 | this.workerMessageListener |
fcd39179 | 1404 | ) |
85aeb3f3 | 1405 | // Send the startup message to worker. |
aa9eede8 | 1406 | this.sendStartupMessageToWorker(workerNodeKey) |
9edb9717 JB |
1407 | // Send the statistics message to worker. |
1408 | this.sendStatisticsMessageToWorker(workerNodeKey) | |
72695f86 | 1409 | if (this.opts.enableTasksQueue === true) { |
dbd73092 | 1410 | if (this.opts.tasksQueueOptions?.taskStealing === true) { |
e1c2dba7 | 1411 | this.workerNodes[workerNodeKey].on( |
e44639e9 JB |
1412 | 'idle', |
1413 | this.handleWorkerNodeIdleEvent | |
9f95d5eb | 1414 | ) |
47352846 JB |
1415 | } |
1416 | if (this.opts.tasksQueueOptions?.tasksStealingOnBackPressure === true) { | |
e1c2dba7 | 1417 | this.workerNodes[workerNodeKey].on( |
b5e75be8 | 1418 | 'backPressure', |
e44639e9 | 1419 | this.handleWorkerNodeBackPressureEvent |
9f95d5eb | 1420 | ) |
47352846 | 1421 | } |
72695f86 | 1422 | } |
d2c73f82 JB |
1423 | } |
1424 | ||
85aeb3f3 | 1425 | /** |
aa9eede8 JB |
1426 | * Sends the startup message to worker given its worker node key. |
1427 | * | |
1428 | * @param workerNodeKey - The worker node key. | |
1429 | */ | |
1430 | protected abstract sendStartupMessageToWorker (workerNodeKey: number): void | |
1431 | ||
1432 | /** | |
9edb9717 | 1433 | * Sends the statistics message to worker given its worker node key. |
85aeb3f3 | 1434 | * |
aa9eede8 | 1435 | * @param workerNodeKey - The worker node key. |
85aeb3f3 | 1436 | */ |
9edb9717 | 1437 | private sendStatisticsMessageToWorker (workerNodeKey: number): void { |
aa9eede8 JB |
1438 | this.sendToWorker(workerNodeKey, { |
1439 | statistics: { | |
1440 | runTime: | |
c63a35a0 | 1441 | this.workerChoiceStrategyContext?.getTaskStatisticsRequirements() |
f4d0a470 | 1442 | .runTime.aggregate ?? false, |
c63a35a0 | 1443 | elu: |
f4d0a470 | 1444 | this.workerChoiceStrategyContext?.getTaskStatisticsRequirements().elu |
c63a35a0 | 1445 | .aggregate ?? false |
72ae84a2 | 1446 | } |
aa9eede8 JB |
1447 | }) |
1448 | } | |
a2ed5053 | 1449 | |
5eb72b9e JB |
1450 | private cannotStealTask (): boolean { |
1451 | return this.workerNodes.length <= 1 || this.info.queuedTasks === 0 | |
1452 | } | |
1453 | ||
42c677c1 JB |
1454 | private handleTask (workerNodeKey: number, task: Task<Data>): void { |
1455 | if (this.shallExecuteTask(workerNodeKey)) { | |
1456 | this.executeTask(workerNodeKey, task) | |
1457 | } else { | |
1458 | this.enqueueTask(workerNodeKey, task) | |
1459 | } | |
1460 | } | |
1461 | ||
a2ed5053 | 1462 | private redistributeQueuedTasks (workerNodeKey: number): void { |
0d033538 | 1463 | if (workerNodeKey === -1 || this.cannotStealTask()) { |
cb71d660 JB |
1464 | return |
1465 | } | |
a2ed5053 | 1466 | while (this.tasksQueueSize(workerNodeKey) > 0) { |
f201a0cd JB |
1467 | const destinationWorkerNodeKey = this.workerNodes.reduce( |
1468 | (minWorkerNodeKey, workerNode, workerNodeKey, workerNodes) => { | |
852ed3e4 JB |
1469 | return workerNode.info.ready && |
1470 | workerNode.usage.tasks.queued < | |
1471 | workerNodes[minWorkerNodeKey].usage.tasks.queued | |
f201a0cd JB |
1472 | ? workerNodeKey |
1473 | : minWorkerNodeKey | |
1474 | }, | |
1475 | 0 | |
1476 | ) | |
42c677c1 JB |
1477 | this.handleTask( |
1478 | destinationWorkerNodeKey, | |
67f3f2d6 JB |
1479 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1480 | this.dequeueTask(workerNodeKey)! | |
42c677c1 | 1481 | ) |
dd951876 JB |
1482 | } |
1483 | } | |
1484 | ||
b1838604 JB |
1485 | private updateTaskStolenStatisticsWorkerUsage ( |
1486 | workerNodeKey: number, | |
b1838604 JB |
1487 | taskName: string |
1488 | ): void { | |
1a880eca | 1489 | const workerNode = this.workerNodes[workerNodeKey] |
c63a35a0 | 1490 | // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition |
efabc98d | 1491 | if (workerNode?.usage != null) { |
b1838604 JB |
1492 | ++workerNode.usage.tasks.stolen |
1493 | } | |
1494 | if ( | |
1495 | this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) && | |
1496 | workerNode.getTaskFunctionWorkerUsage(taskName) != null | |
1497 | ) { | |
67f3f2d6 JB |
1498 | const taskFunctionWorkerUsage = |
1499 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion | |
1500 | workerNode.getTaskFunctionWorkerUsage(taskName)! | |
b1838604 JB |
1501 | ++taskFunctionWorkerUsage.tasks.stolen |
1502 | } | |
1503 | } | |
1504 | ||
463226a4 | 1505 | private updateTaskSequentiallyStolenStatisticsWorkerUsage ( |
f1f77f45 | 1506 | workerNodeKey: number |
463226a4 JB |
1507 | ): void { |
1508 | const workerNode = this.workerNodes[workerNodeKey] | |
c63a35a0 | 1509 | // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition |
efabc98d | 1510 | if (workerNode?.usage != null) { |
463226a4 JB |
1511 | ++workerNode.usage.tasks.sequentiallyStolen |
1512 | } | |
f1f77f45 JB |
1513 | } |
1514 | ||
1515 | private updateTaskSequentiallyStolenStatisticsTaskFunctionWorkerUsage ( | |
1516 | workerNodeKey: number, | |
1517 | taskName: string | |
1518 | ): void { | |
1519 | const workerNode = this.workerNodes[workerNodeKey] | |
463226a4 JB |
1520 | if ( |
1521 | this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) && | |
1522 | workerNode.getTaskFunctionWorkerUsage(taskName) != null | |
1523 | ) { | |
67f3f2d6 JB |
1524 | const taskFunctionWorkerUsage = |
1525 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion | |
1526 | workerNode.getTaskFunctionWorkerUsage(taskName)! | |
463226a4 JB |
1527 | ++taskFunctionWorkerUsage.tasks.sequentiallyStolen |
1528 | } | |
1529 | } | |
1530 | ||
1531 | private resetTaskSequentiallyStolenStatisticsWorkerUsage ( | |
f1f77f45 | 1532 | workerNodeKey: number |
463226a4 JB |
1533 | ): void { |
1534 | const workerNode = this.workerNodes[workerNodeKey] | |
c63a35a0 | 1535 | // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition |
efabc98d | 1536 | if (workerNode?.usage != null) { |
463226a4 JB |
1537 | workerNode.usage.tasks.sequentiallyStolen = 0 |
1538 | } | |
f1f77f45 JB |
1539 | } |
1540 | ||
1541 | private resetTaskSequentiallyStolenStatisticsTaskFunctionWorkerUsage ( | |
1542 | workerNodeKey: number, | |
1543 | taskName: string | |
1544 | ): void { | |
1545 | const workerNode = this.workerNodes[workerNodeKey] | |
463226a4 JB |
1546 | if ( |
1547 | this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) && | |
1548 | workerNode.getTaskFunctionWorkerUsage(taskName) != null | |
1549 | ) { | |
67f3f2d6 JB |
1550 | const taskFunctionWorkerUsage = |
1551 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion | |
1552 | workerNode.getTaskFunctionWorkerUsage(taskName)! | |
463226a4 JB |
1553 | taskFunctionWorkerUsage.tasks.sequentiallyStolen = 0 |
1554 | } | |
1555 | } | |
1556 | ||
e44639e9 | 1557 | private readonly handleWorkerNodeIdleEvent = ( |
e1c2dba7 | 1558 | eventDetail: WorkerNodeEventDetail, |
463226a4 | 1559 | previousStolenTask?: Task<Data> |
9f95d5eb | 1560 | ): void => { |
e1c2dba7 | 1561 | const { workerNodeKey } = eventDetail |
463226a4 JB |
1562 | if (workerNodeKey == null) { |
1563 | throw new Error( | |
c63a35a0 | 1564 | "WorkerNode event detail 'workerNodeKey' property must be defined" |
463226a4 JB |
1565 | ) |
1566 | } | |
c63a35a0 | 1567 | const workerInfo = this.getWorkerInfo(workerNodeKey) |
5eb72b9e JB |
1568 | if ( |
1569 | this.cannotStealTask() || | |
c63a35a0 JB |
1570 | (this.info.stealingWorkerNodes ?? 0) > |
1571 | Math.floor(this.workerNodes.length / 2) | |
5eb72b9e | 1572 | ) { |
1851fed0 | 1573 | if (workerInfo != null && previousStolenTask != null) { |
c63a35a0 | 1574 | workerInfo.stealing = false |
5eb72b9e JB |
1575 | } |
1576 | return | |
1577 | } | |
463226a4 JB |
1578 | const workerNodeTasksUsage = this.workerNodes[workerNodeKey].usage.tasks |
1579 | if ( | |
1851fed0 | 1580 | workerInfo != null && |
463226a4 JB |
1581 | previousStolenTask != null && |
1582 | workerNodeTasksUsage.sequentiallyStolen > 0 && | |
1583 | (workerNodeTasksUsage.executing > 0 || | |
1584 | this.tasksQueueSize(workerNodeKey) > 0) | |
1585 | ) { | |
c63a35a0 | 1586 | workerInfo.stealing = false |
67f3f2d6 | 1587 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
369179f6 | 1588 | for (const taskName of workerInfo.taskFunctionNames!) { |
f1f77f45 JB |
1589 | this.resetTaskSequentiallyStolenStatisticsTaskFunctionWorkerUsage( |
1590 | workerNodeKey, | |
1591 | taskName | |
1592 | ) | |
1593 | } | |
1594 | this.resetTaskSequentiallyStolenStatisticsWorkerUsage(workerNodeKey) | |
463226a4 JB |
1595 | return |
1596 | } | |
1851fed0 JB |
1597 | if (workerInfo == null) { |
1598 | throw new Error( | |
1599 | `Worker node with key '${workerNodeKey}' not found in pool` | |
1600 | ) | |
1601 | } | |
c63a35a0 | 1602 | workerInfo.stealing = true |
463226a4 | 1603 | const stolenTask = this.workerNodeStealTask(workerNodeKey) |
f1f77f45 JB |
1604 | if ( |
1605 | this.shallUpdateTaskFunctionWorkerUsage(workerNodeKey) && | |
1606 | stolenTask != null | |
1607 | ) { | |
67f3f2d6 | 1608 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
f1f77f45 JB |
1609 | const taskFunctionTasksWorkerUsage = this.workerNodes[ |
1610 | workerNodeKey | |
67f3f2d6 JB |
1611 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1612 | ].getTaskFunctionWorkerUsage(stolenTask.name!)!.tasks | |
f1f77f45 JB |
1613 | if ( |
1614 | taskFunctionTasksWorkerUsage.sequentiallyStolen === 0 || | |
1615 | (previousStolenTask != null && | |
1616 | previousStolenTask.name === stolenTask.name && | |
1617 | taskFunctionTasksWorkerUsage.sequentiallyStolen > 0) | |
1618 | ) { | |
1619 | this.updateTaskSequentiallyStolenStatisticsTaskFunctionWorkerUsage( | |
1620 | workerNodeKey, | |
67f3f2d6 JB |
1621 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1622 | stolenTask.name! | |
f1f77f45 JB |
1623 | ) |
1624 | } else { | |
1625 | this.resetTaskSequentiallyStolenStatisticsTaskFunctionWorkerUsage( | |
1626 | workerNodeKey, | |
67f3f2d6 JB |
1627 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1628 | stolenTask.name! | |
f1f77f45 JB |
1629 | ) |
1630 | } | |
1631 | } | |
463226a4 JB |
1632 | sleep(exponentialDelay(workerNodeTasksUsage.sequentiallyStolen)) |
1633 | .then(() => { | |
e44639e9 | 1634 | this.handleWorkerNodeIdleEvent(eventDetail, stolenTask) |
463226a4 JB |
1635 | return undefined |
1636 | }) | |
07f6f7b1 | 1637 | .catch((error: unknown) => { |
2e8cfbb7 JB |
1638 | this.emitter?.emit(PoolEvents.error, error) |
1639 | }) | |
463226a4 JB |
1640 | } |
1641 | ||
1642 | private readonly workerNodeStealTask = ( | |
1643 | workerNodeKey: number | |
1644 | ): Task<Data> | undefined => { | |
dd951876 | 1645 | const workerNodes = this.workerNodes |
a6b3272b | 1646 | .slice() |
dd951876 JB |
1647 | .sort( |
1648 | (workerNodeA, workerNodeB) => | |
1649 | workerNodeB.usage.tasks.queued - workerNodeA.usage.tasks.queued | |
1650 | ) | |
f201a0cd | 1651 | const sourceWorkerNode = workerNodes.find( |
463226a4 JB |
1652 | (sourceWorkerNode, sourceWorkerNodeKey) => |
1653 | sourceWorkerNode.info.ready && | |
5eb72b9e | 1654 | !sourceWorkerNode.info.stealing && |
463226a4 JB |
1655 | sourceWorkerNodeKey !== workerNodeKey && |
1656 | sourceWorkerNode.usage.tasks.queued > 0 | |
f201a0cd JB |
1657 | ) |
1658 | if (sourceWorkerNode != null) { | |
67f3f2d6 JB |
1659 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1660 | const task = sourceWorkerNode.popTask()! | |
42c677c1 | 1661 | this.handleTask(workerNodeKey, task) |
f1f77f45 | 1662 | this.updateTaskSequentiallyStolenStatisticsWorkerUsage(workerNodeKey) |
67f3f2d6 JB |
1663 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1664 | this.updateTaskStolenStatisticsWorkerUsage(workerNodeKey, task.name!) | |
463226a4 | 1665 | return task |
72695f86 JB |
1666 | } |
1667 | } | |
1668 | ||
e44639e9 | 1669 | private readonly handleWorkerNodeBackPressureEvent = ( |
e1c2dba7 | 1670 | eventDetail: WorkerNodeEventDetail |
9f95d5eb | 1671 | ): void => { |
5eb72b9e JB |
1672 | if ( |
1673 | this.cannotStealTask() || | |
c63a35a0 JB |
1674 | (this.info.stealingWorkerNodes ?? 0) > |
1675 | Math.floor(this.workerNodes.length / 2) | |
5eb72b9e | 1676 | ) { |
cb71d660 JB |
1677 | return |
1678 | } | |
e1c2dba7 | 1679 | const { workerId } = eventDetail |
f778c355 | 1680 | const sizeOffset = 1 |
67f3f2d6 JB |
1681 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1682 | if (this.opts.tasksQueueOptions!.size! <= sizeOffset) { | |
68dbcdc0 JB |
1683 | return |
1684 | } | |
72695f86 | 1685 | const sourceWorkerNode = |
b5e75be8 | 1686 | this.workerNodes[this.getWorkerNodeKeyByWorkerId(workerId)] |
72695f86 | 1687 | const workerNodes = this.workerNodes |
a6b3272b | 1688 | .slice() |
72695f86 JB |
1689 | .sort( |
1690 | (workerNodeA, workerNodeB) => | |
1691 | workerNodeA.usage.tasks.queued - workerNodeB.usage.tasks.queued | |
1692 | ) | |
1693 | for (const [workerNodeKey, workerNode] of workerNodes.entries()) { | |
1694 | if ( | |
0bc68267 | 1695 | sourceWorkerNode.usage.tasks.queued > 0 && |
a6b3272b | 1696 | workerNode.info.ready && |
5eb72b9e | 1697 | !workerNode.info.stealing && |
b5e75be8 | 1698 | workerNode.info.id !== workerId && |
0bc68267 | 1699 | workerNode.usage.tasks.queued < |
67f3f2d6 JB |
1700 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1701 | this.opts.tasksQueueOptions!.size! - sizeOffset | |
72695f86 | 1702 | ) { |
c63a35a0 | 1703 | const workerInfo = this.getWorkerInfo(workerNodeKey) |
1851fed0 JB |
1704 | if (workerInfo == null) { |
1705 | throw new Error( | |
1706 | `Worker node with key '${workerNodeKey}' not found in pool` | |
1707 | ) | |
1708 | } | |
c63a35a0 | 1709 | workerInfo.stealing = true |
67f3f2d6 JB |
1710 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1711 | const task = sourceWorkerNode.popTask()! | |
42c677c1 | 1712 | this.handleTask(workerNodeKey, task) |
67f3f2d6 JB |
1713 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1714 | this.updateTaskStolenStatisticsWorkerUsage(workerNodeKey, task.name!) | |
c63a35a0 | 1715 | workerInfo.stealing = false |
10ecf8fd | 1716 | } |
a2ed5053 JB |
1717 | } |
1718 | } | |
1719 | ||
be0676b3 | 1720 | /** |
fcd39179 | 1721 | * This method is the message listener registered on each worker. |
be0676b3 | 1722 | */ |
3a776b6d JB |
1723 | protected readonly workerMessageListener = ( |
1724 | message: MessageValue<Response> | |
1725 | ): void => { | |
fcd39179 | 1726 | this.checkMessageWorkerId(message) |
b641345c JB |
1727 | const { workerId, ready, taskId, taskFunctionNames } = message |
1728 | if (ready != null && taskFunctionNames != null) { | |
fcd39179 JB |
1729 | // Worker ready response received from worker |
1730 | this.handleWorkerReadyResponse(message) | |
b641345c | 1731 | } else if (taskId != null) { |
fcd39179 JB |
1732 | // Task execution response received from worker |
1733 | this.handleTaskExecutionResponse(message) | |
b641345c | 1734 | } else if (taskFunctionNames != null) { |
fcd39179 | 1735 | // Task function names message received from worker |
1851fed0 | 1736 | const workerInfo = this.getWorkerInfo( |
b641345c | 1737 | this.getWorkerNodeKeyByWorkerId(workerId) |
1851fed0 JB |
1738 | ) |
1739 | if (workerInfo != null) { | |
1740 | workerInfo.taskFunctionNames = taskFunctionNames | |
1741 | } | |
6b272951 JB |
1742 | } |
1743 | } | |
1744 | ||
8e8d9101 JB |
1745 | private checkAndEmitReadyEvent (): void { |
1746 | if (!this.readyEventEmitted && this.ready) { | |
1747 | this.emitter?.emit(PoolEvents.ready, this.info) | |
1748 | this.readyEventEmitted = true | |
1749 | } | |
1750 | } | |
1751 | ||
10e2aa7e | 1752 | private handleWorkerReadyResponse (message: MessageValue<Response>): void { |
463226a4 | 1753 | const { workerId, ready, taskFunctionNames } = message |
e44639e9 | 1754 | if (ready == null || !ready) { |
c63a35a0 | 1755 | throw new Error(`Worker ${workerId} failed to initialize`) |
f05ed93c | 1756 | } |
e44639e9 JB |
1757 | const workerNode = |
1758 | this.workerNodes[this.getWorkerNodeKeyByWorkerId(workerId)] | |
1759 | workerNode.info.ready = ready | |
1760 | workerNode.info.taskFunctionNames = taskFunctionNames | |
8e8d9101 | 1761 | this.checkAndEmitReadyEvent() |
6b272951 JB |
1762 | } |
1763 | ||
1764 | private handleTaskExecutionResponse (message: MessageValue<Response>): void { | |
463226a4 | 1765 | const { workerId, taskId, workerError, data } = message |
67f3f2d6 JB |
1766 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1767 | const promiseResponse = this.promiseResponseMap.get(taskId!) | |
6b272951 | 1768 | if (promiseResponse != null) { |
f18fd12b | 1769 | const { resolve, reject, workerNodeKey, asyncResource } = promiseResponse |
9b358e72 | 1770 | const workerNode = this.workerNodes[workerNodeKey] |
6703b9f4 JB |
1771 | if (workerError != null) { |
1772 | this.emitter?.emit(PoolEvents.taskError, workerError) | |
f18fd12b JB |
1773 | asyncResource != null |
1774 | ? asyncResource.runInAsyncScope( | |
1775 | reject, | |
1776 | this.emitter, | |
1777 | workerError.message | |
1778 | ) | |
1779 | : reject(workerError.message) | |
6b272951 | 1780 | } else { |
f18fd12b JB |
1781 | asyncResource != null |
1782 | ? asyncResource.runInAsyncScope(resolve, this.emitter, data) | |
1783 | : resolve(data as Response) | |
6b272951 | 1784 | } |
f18fd12b | 1785 | asyncResource?.emitDestroy() |
501aea93 | 1786 | this.afterTaskExecutionHook(workerNodeKey, message) |
67f3f2d6 JB |
1787 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1788 | this.promiseResponseMap.delete(taskId!) | |
cdaecaee JB |
1789 | // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition |
1790 | workerNode?.emit('taskFinished', taskId) | |
16d7e943 JB |
1791 | if ( |
1792 | this.opts.enableTasksQueue === true && | |
1793 | !this.destroying && | |
1794 | // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition | |
1795 | workerNode != null | |
1796 | ) { | |
9b358e72 | 1797 | const workerNodeTasksUsage = workerNode.usage.tasks |
463226a4 JB |
1798 | if ( |
1799 | this.tasksQueueSize(workerNodeKey) > 0 && | |
1800 | workerNodeTasksUsage.executing < | |
67f3f2d6 JB |
1801 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1802 | this.opts.tasksQueueOptions!.concurrency! | |
463226a4 | 1803 | ) { |
67f3f2d6 JB |
1804 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1805 | this.executeTask(workerNodeKey, this.dequeueTask(workerNodeKey)!) | |
463226a4 JB |
1806 | } |
1807 | if ( | |
1808 | workerNodeTasksUsage.executing === 0 && | |
1809 | this.tasksQueueSize(workerNodeKey) === 0 && | |
1810 | workerNodeTasksUsage.sequentiallyStolen === 0 | |
1811 | ) { | |
e44639e9 | 1812 | workerNode.emit('idle', { |
7f0e1334 | 1813 | workerId, |
e1c2dba7 JB |
1814 | workerNodeKey |
1815 | }) | |
463226a4 | 1816 | } |
be0676b3 APA |
1817 | } |
1818 | } | |
be0676b3 | 1819 | } |
7c0ba920 | 1820 | |
a1763c54 | 1821 | private checkAndEmitTaskExecutionEvents (): void { |
33e6bb4c JB |
1822 | if (this.busy) { |
1823 | this.emitter?.emit(PoolEvents.busy, this.info) | |
a1763c54 JB |
1824 | } |
1825 | } | |
1826 | ||
1827 | private checkAndEmitTaskQueuingEvents (): void { | |
1828 | if (this.hasBackPressure()) { | |
1829 | this.emitter?.emit(PoolEvents.backPressure, this.info) | |
164d950a JB |
1830 | } |
1831 | } | |
1832 | ||
d0878034 JB |
1833 | /** |
1834 | * Emits dynamic worker creation events. | |
1835 | */ | |
1836 | protected abstract checkAndEmitDynamicWorkerCreationEvents (): void | |
33e6bb4c | 1837 | |
8a1260a3 | 1838 | /** |
aa9eede8 | 1839 | * Gets the worker information given its worker node key. |
8a1260a3 JB |
1840 | * |
1841 | * @param workerNodeKey - The worker node key. | |
3f09ed9f | 1842 | * @returns The worker information. |
8a1260a3 | 1843 | */ |
1851fed0 JB |
1844 | protected getWorkerInfo (workerNodeKey: number): WorkerInfo | undefined { |
1845 | return this.workerNodes[workerNodeKey]?.info | |
e221309a JB |
1846 | } |
1847 | ||
a05c10de | 1848 | /** |
c3719753 | 1849 | * Creates a worker node. |
ea7a90d3 | 1850 | * |
c3719753 | 1851 | * @returns The created worker node. |
ea7a90d3 | 1852 | */ |
c3719753 | 1853 | private createWorkerNode (): IWorkerNode<Worker, Data> { |
671d5154 | 1854 | const workerNode = new WorkerNode<Worker, Data>( |
c3719753 JB |
1855 | this.worker, |
1856 | this.filePath, | |
1857 | { | |
1858 | env: this.opts.env, | |
1859 | workerOptions: this.opts.workerOptions, | |
1860 | tasksQueueBackPressureSize: | |
32b141fd | 1861 | this.opts.tasksQueueOptions?.size ?? |
26ce26ca JB |
1862 | getDefaultTasksQueueOptions( |
1863 | this.maximumNumberOfWorkers ?? this.minimumNumberOfWorkers | |
1864 | ).size | |
c3719753 | 1865 | } |
671d5154 | 1866 | ) |
b97d82d8 | 1867 | // Flag the worker node as ready at pool startup. |
d2c73f82 JB |
1868 | if (this.starting) { |
1869 | workerNode.info.ready = true | |
1870 | } | |
c3719753 JB |
1871 | return workerNode |
1872 | } | |
1873 | ||
1874 | /** | |
1875 | * Adds the given worker node in the pool worker nodes. | |
1876 | * | |
1877 | * @param workerNode - The worker node. | |
1878 | * @returns The added worker node key. | |
1879 | * @throws {@link https://nodejs.org/api/errors.html#class-error} If the added worker node is not found. | |
1880 | */ | |
1881 | private addWorkerNode (workerNode: IWorkerNode<Worker, Data>): number { | |
aa9eede8 | 1882 | this.workerNodes.push(workerNode) |
c3719753 | 1883 | const workerNodeKey = this.workerNodes.indexOf(workerNode) |
aa9eede8 | 1884 | if (workerNodeKey === -1) { |
86ed0598 | 1885 | throw new Error('Worker added not found in worker nodes') |
aa9eede8 JB |
1886 | } |
1887 | return workerNodeKey | |
ea7a90d3 | 1888 | } |
c923ce56 | 1889 | |
8e8d9101 JB |
1890 | private checkAndEmitEmptyEvent (): void { |
1891 | if (this.empty) { | |
1892 | this.emitter?.emit(PoolEvents.empty, this.info) | |
1893 | this.readyEventEmitted = false | |
1894 | } | |
1895 | } | |
1896 | ||
51fe3d3c | 1897 | /** |
9974369e | 1898 | * Removes the worker node from the pool worker nodes. |
51fe3d3c | 1899 | * |
9974369e | 1900 | * @param workerNode - The worker node. |
51fe3d3c | 1901 | */ |
9974369e JB |
1902 | private removeWorkerNode (workerNode: IWorkerNode<Worker, Data>): void { |
1903 | const workerNodeKey = this.workerNodes.indexOf(workerNode) | |
1f68cede JB |
1904 | if (workerNodeKey !== -1) { |
1905 | this.workerNodes.splice(workerNodeKey, 1) | |
c63a35a0 | 1906 | this.workerChoiceStrategyContext?.remove(workerNodeKey) |
1f68cede | 1907 | } |
8e8d9101 | 1908 | this.checkAndEmitEmptyEvent() |
51fe3d3c | 1909 | } |
adc3c320 | 1910 | |
ae3ab61d | 1911 | protected flagWorkerNodeAsNotReady (workerNodeKey: number): void { |
1851fed0 JB |
1912 | const workerInfo = this.getWorkerInfo(workerNodeKey) |
1913 | if (workerInfo != null) { | |
1914 | workerInfo.ready = false | |
1915 | } | |
ae3ab61d JB |
1916 | } |
1917 | ||
9e844245 JB |
1918 | private hasBackPressure (): boolean { |
1919 | return ( | |
1920 | this.opts.enableTasksQueue === true && | |
1921 | this.workerNodes.findIndex( | |
041dc05b | 1922 | workerNode => !workerNode.hasBackPressure() |
a1763c54 | 1923 | ) === -1 |
9e844245 | 1924 | ) |
e2b31e32 JB |
1925 | } |
1926 | ||
b0a4db63 | 1927 | /** |
aa9eede8 | 1928 | * Executes the given task on the worker given its worker node key. |
b0a4db63 | 1929 | * |
aa9eede8 | 1930 | * @param workerNodeKey - The worker node key. |
b0a4db63 JB |
1931 | * @param task - The task to execute. |
1932 | */ | |
2e81254d | 1933 | private executeTask (workerNodeKey: number, task: Task<Data>): void { |
1c6fe997 | 1934 | this.beforeTaskExecutionHook(workerNodeKey, task) |
bbfa38a2 | 1935 | this.sendToWorker(workerNodeKey, task, task.transferList) |
a1763c54 | 1936 | this.checkAndEmitTaskExecutionEvents() |
2e81254d JB |
1937 | } |
1938 | ||
f9f00b5f | 1939 | private enqueueTask (workerNodeKey: number, task: Task<Data>): number { |
a1763c54 JB |
1940 | const tasksQueueSize = this.workerNodes[workerNodeKey].enqueueTask(task) |
1941 | this.checkAndEmitTaskQueuingEvents() | |
1942 | return tasksQueueSize | |
adc3c320 JB |
1943 | } |
1944 | ||
416fd65c | 1945 | private dequeueTask (workerNodeKey: number): Task<Data> | undefined { |
4b628b48 | 1946 | return this.workerNodes[workerNodeKey].dequeueTask() |
adc3c320 JB |
1947 | } |
1948 | ||
416fd65c | 1949 | private tasksQueueSize (workerNodeKey: number): number { |
4b628b48 | 1950 | return this.workerNodes[workerNodeKey].tasksQueueSize() |
df593701 JB |
1951 | } |
1952 | ||
87347ea8 JB |
1953 | protected flushTasksQueue (workerNodeKey: number): number { |
1954 | let flushedTasks = 0 | |
920278a2 | 1955 | while (this.tasksQueueSize(workerNodeKey) > 0) { |
67f3f2d6 JB |
1956 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
1957 | this.executeTask(workerNodeKey, this.dequeueTask(workerNodeKey)!) | |
87347ea8 | 1958 | ++flushedTasks |
ff733df7 | 1959 | } |
4b628b48 | 1960 | this.workerNodes[workerNodeKey].clearTasksQueue() |
87347ea8 | 1961 | return flushedTasks |
ff733df7 JB |
1962 | } |
1963 | ||
ef41a6e6 JB |
1964 | private flushTasksQueues (): void { |
1965 | for (const [workerNodeKey] of this.workerNodes.entries()) { | |
1966 | this.flushTasksQueue(workerNodeKey) | |
1967 | } | |
1968 | } | |
c97c7edb | 1969 | } |