Commit | Line | Data |
---|---|---|
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' |
e102732c JB |
24 | import type { |
25 | IWorker, | |
26 | MessageHandler, | |
27 | Task, | |
28 | WorkerNode, | |
29 | WorkerUsage | |
30 | } from './worker' | |
a35560ba | 31 | import { |
f0d7f803 | 32 | Measurements, |
a35560ba | 33 | WorkerChoiceStrategies, |
a20f0ba5 JB |
34 | type WorkerChoiceStrategy, |
35 | type WorkerChoiceStrategyOptions | |
bdaf31cd JB |
36 | } from './selection-strategies/selection-strategies-types' |
37 | import { WorkerChoiceStrategyContext } from './selection-strategies/worker-choice-strategy-context' | |
c97c7edb | 38 | |
729c563d | 39 | /** |
ea7a90d3 | 40 | * Base class that implements some shared logic for all poolifier pools. |
729c563d | 41 | * |
38e795c1 | 42 | * @typeParam Worker - Type of worker which manages this pool. |
e102732c JB |
43 | * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data. |
44 | * @typeParam Response - Type of execution response. This can only be structured-cloneable data. | |
729c563d | 45 | */ |
c97c7edb | 46 | export abstract class AbstractPool< |
f06e48d8 | 47 | Worker extends IWorker, |
d3c8a1a8 S |
48 | Data = unknown, |
49 | Response = unknown | |
c4855468 | 50 | > implements IPool<Worker, Data, Response> { |
afc003b2 | 51 | /** @inheritDoc */ |
f06e48d8 | 52 | public readonly workerNodes: Array<WorkerNode<Worker, Data>> = [] |
4a6952ff | 53 | |
afc003b2 | 54 | /** @inheritDoc */ |
7c0ba920 JB |
55 | public readonly emitter?: PoolEmitter |
56 | ||
be0676b3 | 57 | /** |
a3445496 | 58 | * The execution response promise map. |
be0676b3 | 59 | * |
2740a743 | 60 | * - `key`: The message id of each submitted task. |
a3445496 | 61 | * - `value`: An object that contains the worker, the execution response promise resolve and reject callbacks. |
be0676b3 | 62 | * |
a3445496 | 63 | * When we receive a message from the worker, we get a map entry with the promise resolve/reject bound to the message id. |
be0676b3 | 64 | */ |
c923ce56 JB |
65 | protected promiseResponseMap: Map< |
66 | string, | |
67 | PromiseResponseWrapper<Worker, Response> | |
68 | > = new Map<string, PromiseResponseWrapper<Worker, Response>>() | |
c97c7edb | 69 | |
a35560ba | 70 | /** |
51fe3d3c | 71 | * Worker choice strategy context referencing a worker choice algorithm implementation. |
a35560ba S |
72 | */ |
73 | protected workerChoiceStrategyContext: WorkerChoiceStrategyContext< | |
78cea37e JB |
74 | Worker, |
75 | Data, | |
76 | Response | |
a35560ba S |
77 | > |
78 | ||
729c563d S |
79 | /** |
80 | * Constructs a new poolifier pool. | |
81 | * | |
38e795c1 | 82 | * @param numberOfWorkers - Number of workers that this pool should manage. |
029715f0 | 83 | * @param filePath - Path to the worker file. |
38e795c1 | 84 | * @param opts - Options for the pool. |
729c563d | 85 | */ |
c97c7edb | 86 | public constructor ( |
b4213b7f JB |
87 | protected readonly numberOfWorkers: number, |
88 | protected readonly filePath: string, | |
89 | protected readonly opts: PoolOptions<Worker> | |
c97c7edb | 90 | ) { |
78cea37e | 91 | if (!this.isMain()) { |
c97c7edb S |
92 | throw new Error('Cannot start a pool from a worker!') |
93 | } | |
8d3782fa | 94 | this.checkNumberOfWorkers(this.numberOfWorkers) |
c510fea7 | 95 | this.checkFilePath(this.filePath) |
7c0ba920 | 96 | this.checkPoolOptions(this.opts) |
1086026a | 97 | |
7254e419 JB |
98 | this.chooseWorkerNode = this.chooseWorkerNode.bind(this) |
99 | this.executeTask = this.executeTask.bind(this) | |
100 | this.enqueueTask = this.enqueueTask.bind(this) | |
101 | this.checkAndEmitEvents = this.checkAndEmitEvents.bind(this) | |
1086026a | 102 | |
6bd72cd0 | 103 | if (this.opts.enableEvents === true) { |
7c0ba920 JB |
104 | this.emitter = new PoolEmitter() |
105 | } | |
d59df138 JB |
106 | this.workerChoiceStrategyContext = new WorkerChoiceStrategyContext< |
107 | Worker, | |
108 | Data, | |
109 | Response | |
da309861 JB |
110 | >( |
111 | this, | |
112 | this.opts.workerChoiceStrategy, | |
113 | this.opts.workerChoiceStrategyOptions | |
114 | ) | |
b6b32453 JB |
115 | |
116 | this.setupHook() | |
117 | ||
118 | for (let i = 1; i <= this.numberOfWorkers; i++) { | |
119 | this.createAndSetupWorker() | |
120 | } | |
c97c7edb S |
121 | } |
122 | ||
a35560ba | 123 | private checkFilePath (filePath: string): void { |
ffcbbad8 JB |
124 | if ( |
125 | filePath == null || | |
126 | (typeof filePath === 'string' && filePath.trim().length === 0) | |
127 | ) { | |
c510fea7 APA |
128 | throw new Error('Please specify a file with a worker implementation') |
129 | } | |
130 | } | |
131 | ||
8d3782fa JB |
132 | private checkNumberOfWorkers (numberOfWorkers: number): void { |
133 | if (numberOfWorkers == null) { | |
134 | throw new Error( | |
135 | 'Cannot instantiate a pool without specifying the number of workers' | |
136 | ) | |
78cea37e | 137 | } else if (!Number.isSafeInteger(numberOfWorkers)) { |
473c717a | 138 | throw new TypeError( |
0d80593b | 139 | 'Cannot instantiate a pool with a non safe integer number of workers' |
8d3782fa JB |
140 | ) |
141 | } else if (numberOfWorkers < 0) { | |
473c717a | 142 | throw new RangeError( |
8d3782fa JB |
143 | 'Cannot instantiate a pool with a negative number of workers' |
144 | ) | |
6b27d407 | 145 | } else if (this.type === PoolTypes.fixed && numberOfWorkers === 0) { |
8d3782fa JB |
146 | throw new Error('Cannot instantiate a fixed pool with no worker') |
147 | } | |
148 | } | |
149 | ||
7c0ba920 | 150 | private checkPoolOptions (opts: PoolOptions<Worker>): void { |
0d80593b JB |
151 | if (isPlainObject(opts)) { |
152 | this.opts.workerChoiceStrategy = | |
153 | opts.workerChoiceStrategy ?? WorkerChoiceStrategies.ROUND_ROBIN | |
154 | this.checkValidWorkerChoiceStrategy(this.opts.workerChoiceStrategy) | |
155 | this.opts.workerChoiceStrategyOptions = | |
156 | opts.workerChoiceStrategyOptions ?? | |
157 | DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS | |
49be33fe JB |
158 | this.checkValidWorkerChoiceStrategyOptions( |
159 | this.opts.workerChoiceStrategyOptions | |
160 | ) | |
1f68cede | 161 | this.opts.restartWorkerOnError = opts.restartWorkerOnError ?? true |
0d80593b JB |
162 | this.opts.enableEvents = opts.enableEvents ?? true |
163 | this.opts.enableTasksQueue = opts.enableTasksQueue ?? false | |
164 | if (this.opts.enableTasksQueue) { | |
165 | this.checkValidTasksQueueOptions( | |
166 | opts.tasksQueueOptions as TasksQueueOptions | |
167 | ) | |
168 | this.opts.tasksQueueOptions = this.buildTasksQueueOptions( | |
169 | opts.tasksQueueOptions as TasksQueueOptions | |
170 | ) | |
171 | } | |
172 | } else { | |
173 | throw new TypeError('Invalid pool options: must be a plain object') | |
7171d33f | 174 | } |
aee46736 JB |
175 | } |
176 | ||
177 | private checkValidWorkerChoiceStrategy ( | |
178 | workerChoiceStrategy: WorkerChoiceStrategy | |
179 | ): void { | |
180 | if (!Object.values(WorkerChoiceStrategies).includes(workerChoiceStrategy)) { | |
b529c323 | 181 | throw new Error( |
aee46736 | 182 | `Invalid worker choice strategy '${workerChoiceStrategy}'` |
b529c323 JB |
183 | ) |
184 | } | |
7c0ba920 JB |
185 | } |
186 | ||
0d80593b JB |
187 | private checkValidWorkerChoiceStrategyOptions ( |
188 | workerChoiceStrategyOptions: WorkerChoiceStrategyOptions | |
189 | ): void { | |
190 | if (!isPlainObject(workerChoiceStrategyOptions)) { | |
191 | throw new TypeError( | |
192 | 'Invalid worker choice strategy options: must be a plain object' | |
193 | ) | |
194 | } | |
49be33fe JB |
195 | if ( |
196 | workerChoiceStrategyOptions.weights != null && | |
6b27d407 | 197 | Object.keys(workerChoiceStrategyOptions.weights).length !== this.maxSize |
49be33fe JB |
198 | ) { |
199 | throw new Error( | |
200 | 'Invalid worker choice strategy options: must have a weight for each worker node' | |
201 | ) | |
202 | } | |
f0d7f803 JB |
203 | if ( |
204 | workerChoiceStrategyOptions.measurement != null && | |
205 | !Object.values(Measurements).includes( | |
206 | workerChoiceStrategyOptions.measurement | |
207 | ) | |
208 | ) { | |
209 | throw new Error( | |
210 | `Invalid worker choice strategy options: invalid measurement '${workerChoiceStrategyOptions.measurement}'` | |
211 | ) | |
212 | } | |
0d80593b JB |
213 | } |
214 | ||
a20f0ba5 JB |
215 | private checkValidTasksQueueOptions ( |
216 | tasksQueueOptions: TasksQueueOptions | |
217 | ): void { | |
0d80593b JB |
218 | if (tasksQueueOptions != null && !isPlainObject(tasksQueueOptions)) { |
219 | throw new TypeError('Invalid tasks queue options: must be a plain object') | |
220 | } | |
f0d7f803 JB |
221 | if ( |
222 | tasksQueueOptions?.concurrency != null && | |
223 | !Number.isSafeInteger(tasksQueueOptions.concurrency) | |
224 | ) { | |
225 | throw new TypeError( | |
226 | 'Invalid worker tasks concurrency: must be an integer' | |
227 | ) | |
228 | } | |
229 | if ( | |
230 | tasksQueueOptions?.concurrency != null && | |
231 | tasksQueueOptions.concurrency <= 0 | |
232 | ) { | |
a20f0ba5 | 233 | throw new Error( |
f0d7f803 | 234 | `Invalid worker tasks concurrency '${tasksQueueOptions.concurrency}'` |
a20f0ba5 JB |
235 | ) |
236 | } | |
237 | } | |
238 | ||
08f3f44c | 239 | /** @inheritDoc */ |
6b27d407 JB |
240 | public get info (): PoolInfo { |
241 | return { | |
242 | type: this.type, | |
184855e6 | 243 | worker: this.worker, |
6b27d407 JB |
244 | minSize: this.minSize, |
245 | maxSize: this.maxSize, | |
246 | workerNodes: this.workerNodes.length, | |
247 | idleWorkerNodes: this.workerNodes.reduce( | |
248 | (accumulator, workerNode) => | |
465b2940 | 249 | workerNode.usage.tasks.executing === 0 |
a4e07f72 JB |
250 | ? accumulator + 1 |
251 | : accumulator, | |
6b27d407 JB |
252 | 0 |
253 | ), | |
254 | busyWorkerNodes: this.workerNodes.reduce( | |
255 | (accumulator, workerNode) => | |
465b2940 | 256 | workerNode.usage.tasks.executing > 0 ? accumulator + 1 : accumulator, |
6b27d407 JB |
257 | 0 |
258 | ), | |
a4e07f72 | 259 | executedTasks: this.workerNodes.reduce( |
6b27d407 | 260 | (accumulator, workerNode) => |
465b2940 | 261 | accumulator + workerNode.usage.tasks.executed, |
a4e07f72 JB |
262 | 0 |
263 | ), | |
264 | executingTasks: this.workerNodes.reduce( | |
265 | (accumulator, workerNode) => | |
465b2940 | 266 | accumulator + workerNode.usage.tasks.executing, |
6b27d407 JB |
267 | 0 |
268 | ), | |
269 | queuedTasks: this.workerNodes.reduce( | |
df593701 | 270 | (accumulator, workerNode) => |
465b2940 | 271 | accumulator + workerNode.usage.tasks.queued, |
6b27d407 JB |
272 | 0 |
273 | ), | |
274 | maxQueuedTasks: this.workerNodes.reduce( | |
275 | (accumulator, workerNode) => | |
465b2940 | 276 | accumulator + workerNode.usage.tasks.maxQueued, |
6b27d407 | 277 | 0 |
a4e07f72 JB |
278 | ), |
279 | failedTasks: this.workerNodes.reduce( | |
280 | (accumulator, workerNode) => | |
465b2940 | 281 | accumulator + workerNode.usage.tasks.failed, |
a4e07f72 | 282 | 0 |
6b27d407 JB |
283 | ) |
284 | } | |
285 | } | |
08f3f44c | 286 | |
8881ae32 JB |
287 | /** |
288 | * Pool type. | |
289 | * | |
290 | * If it is `'dynamic'`, it provides the `max` property. | |
291 | */ | |
292 | protected abstract get type (): PoolType | |
293 | ||
184855e6 JB |
294 | /** |
295 | * Gets the worker type. | |
296 | */ | |
297 | protected abstract get worker (): WorkerType | |
298 | ||
c2ade475 | 299 | /** |
6b27d407 | 300 | * Pool minimum size. |
c2ade475 | 301 | */ |
6b27d407 | 302 | protected abstract get minSize (): number |
ff733df7 JB |
303 | |
304 | /** | |
6b27d407 | 305 | * Pool maximum size. |
ff733df7 | 306 | */ |
6b27d407 | 307 | protected abstract get maxSize (): number |
a35560ba | 308 | |
ffcbbad8 | 309 | /** |
f06e48d8 | 310 | * Gets the given worker its worker node key. |
ffcbbad8 JB |
311 | * |
312 | * @param worker - The worker. | |
465b2940 | 313 | * @returns The worker node key if found in the pool worker nodes, `-1` otherwise. |
ffcbbad8 | 314 | */ |
f06e48d8 JB |
315 | private getWorkerNodeKey (worker: Worker): number { |
316 | return this.workerNodes.findIndex( | |
317 | workerNode => workerNode.worker === worker | |
318 | ) | |
bf9549ae JB |
319 | } |
320 | ||
afc003b2 | 321 | /** @inheritDoc */ |
a35560ba | 322 | public setWorkerChoiceStrategy ( |
59219cbb JB |
323 | workerChoiceStrategy: WorkerChoiceStrategy, |
324 | workerChoiceStrategyOptions?: WorkerChoiceStrategyOptions | |
a35560ba | 325 | ): void { |
aee46736 | 326 | this.checkValidWorkerChoiceStrategy(workerChoiceStrategy) |
b98ec2e6 | 327 | this.opts.workerChoiceStrategy = workerChoiceStrategy |
b6b32453 JB |
328 | this.workerChoiceStrategyContext.setWorkerChoiceStrategy( |
329 | this.opts.workerChoiceStrategy | |
330 | ) | |
331 | if (workerChoiceStrategyOptions != null) { | |
332 | this.setWorkerChoiceStrategyOptions(workerChoiceStrategyOptions) | |
333 | } | |
9c16fb4b | 334 | for (const [workerNodeKey, workerNode] of this.workerNodes.entries()) { |
8604aaab JB |
335 | this.setWorkerNodeTasksUsage( |
336 | workerNode, | |
9c16fb4b | 337 | this.getWorkerUsage(workerNodeKey) |
8604aaab | 338 | ) |
b6b32453 | 339 | this.setWorkerStatistics(workerNode.worker) |
59219cbb | 340 | } |
a20f0ba5 JB |
341 | } |
342 | ||
343 | /** @inheritDoc */ | |
344 | public setWorkerChoiceStrategyOptions ( | |
345 | workerChoiceStrategyOptions: WorkerChoiceStrategyOptions | |
346 | ): void { | |
0d80593b | 347 | this.checkValidWorkerChoiceStrategyOptions(workerChoiceStrategyOptions) |
a20f0ba5 JB |
348 | this.opts.workerChoiceStrategyOptions = workerChoiceStrategyOptions |
349 | this.workerChoiceStrategyContext.setOptions( | |
350 | this.opts.workerChoiceStrategyOptions | |
a35560ba S |
351 | ) |
352 | } | |
353 | ||
a20f0ba5 | 354 | /** @inheritDoc */ |
8f52842f JB |
355 | public enableTasksQueue ( |
356 | enable: boolean, | |
357 | tasksQueueOptions?: TasksQueueOptions | |
358 | ): void { | |
a20f0ba5 | 359 | if (this.opts.enableTasksQueue === true && !enable) { |
ef41a6e6 | 360 | this.flushTasksQueues() |
a20f0ba5 JB |
361 | } |
362 | this.opts.enableTasksQueue = enable | |
8f52842f | 363 | this.setTasksQueueOptions(tasksQueueOptions as TasksQueueOptions) |
a20f0ba5 JB |
364 | } |
365 | ||
366 | /** @inheritDoc */ | |
8f52842f | 367 | public setTasksQueueOptions (tasksQueueOptions: TasksQueueOptions): void { |
a20f0ba5 | 368 | if (this.opts.enableTasksQueue === true) { |
8f52842f JB |
369 | this.checkValidTasksQueueOptions(tasksQueueOptions) |
370 | this.opts.tasksQueueOptions = | |
371 | this.buildTasksQueueOptions(tasksQueueOptions) | |
5baee0d7 | 372 | } else if (this.opts.tasksQueueOptions != null) { |
a20f0ba5 JB |
373 | delete this.opts.tasksQueueOptions |
374 | } | |
375 | } | |
376 | ||
377 | private buildTasksQueueOptions ( | |
378 | tasksQueueOptions: TasksQueueOptions | |
379 | ): TasksQueueOptions { | |
380 | return { | |
381 | concurrency: tasksQueueOptions?.concurrency ?? 1 | |
382 | } | |
383 | } | |
384 | ||
c319c66b JB |
385 | /** |
386 | * Whether the pool is full or not. | |
387 | * | |
388 | * The pool filling boolean status. | |
389 | */ | |
dea903a8 JB |
390 | protected get full (): boolean { |
391 | return this.workerNodes.length >= this.maxSize | |
392 | } | |
c2ade475 | 393 | |
c319c66b JB |
394 | /** |
395 | * Whether the pool is busy or not. | |
396 | * | |
397 | * The pool busyness boolean status. | |
398 | */ | |
399 | protected abstract get busy (): boolean | |
7c0ba920 | 400 | |
6c6afb84 JB |
401 | /** |
402 | * Whether worker nodes are executing at least one task. | |
403 | * | |
404 | * @returns Worker nodes busyness boolean status. | |
405 | */ | |
c2ade475 | 406 | protected internalBusy (): boolean { |
e0ae6100 JB |
407 | return ( |
408 | this.workerNodes.findIndex(workerNode => { | |
465b2940 | 409 | return workerNode.usage.tasks.executing === 0 |
e0ae6100 JB |
410 | }) === -1 |
411 | ) | |
cb70b19d JB |
412 | } |
413 | ||
afc003b2 | 414 | /** @inheritDoc */ |
a86b6df1 | 415 | public async execute (data?: Data, name?: string): Promise<Response> { |
b6b32453 | 416 | const timestamp = performance.now() |
20dcad1a | 417 | const workerNodeKey = this.chooseWorkerNode() |
adc3c320 | 418 | const submittedTask: Task<Data> = { |
a86b6df1 | 419 | name, |
e5a5c0fc JB |
420 | // eslint-disable-next-line @typescript-eslint/consistent-type-assertions |
421 | data: data ?? ({} as Data), | |
b6b32453 | 422 | timestamp, |
adc3c320 JB |
423 | id: crypto.randomUUID() |
424 | } | |
2e81254d | 425 | const res = new Promise<Response>((resolve, reject) => { |
02706357 | 426 | this.promiseResponseMap.set(submittedTask.id as string, { |
2e81254d JB |
427 | resolve, |
428 | reject, | |
20dcad1a | 429 | worker: this.workerNodes[workerNodeKey].worker |
2e81254d JB |
430 | }) |
431 | }) | |
ff733df7 JB |
432 | if ( |
433 | this.opts.enableTasksQueue === true && | |
7171d33f | 434 | (this.busy || |
465b2940 | 435 | this.workerNodes[workerNodeKey].usage.tasks.executing >= |
7171d33f | 436 | ((this.opts.tasksQueueOptions as TasksQueueOptions) |
3528c992 | 437 | .concurrency as number)) |
ff733df7 | 438 | ) { |
26a929d7 JB |
439 | this.enqueueTask(workerNodeKey, submittedTask) |
440 | } else { | |
2e81254d | 441 | this.executeTask(workerNodeKey, submittedTask) |
adc3c320 | 442 | } |
ff733df7 | 443 | this.checkAndEmitEvents() |
78cea37e | 444 | // eslint-disable-next-line @typescript-eslint/return-await |
280c2a77 S |
445 | return res |
446 | } | |
c97c7edb | 447 | |
afc003b2 | 448 | /** @inheritDoc */ |
c97c7edb | 449 | public async destroy (): Promise<void> { |
1fbcaa7c | 450 | await Promise.all( |
875a7c37 JB |
451 | this.workerNodes.map(async (workerNode, workerNodeKey) => { |
452 | this.flushTasksQueue(workerNodeKey) | |
47aacbaa | 453 | // FIXME: wait for tasks to be finished |
f06e48d8 | 454 | await this.destroyWorker(workerNode.worker) |
1fbcaa7c JB |
455 | }) |
456 | ) | |
c97c7edb S |
457 | } |
458 | ||
4a6952ff | 459 | /** |
6c6afb84 | 460 | * Terminates the given worker. |
4a6952ff | 461 | * |
f06e48d8 | 462 | * @param worker - A worker within `workerNodes`. |
4a6952ff JB |
463 | */ |
464 | protected abstract destroyWorker (worker: Worker): void | Promise<void> | |
c97c7edb | 465 | |
729c563d | 466 | /** |
6677a3d3 JB |
467 | * Setup hook to execute code before worker nodes are created in the abstract constructor. |
468 | * Can be overridden. | |
afc003b2 JB |
469 | * |
470 | * @virtual | |
729c563d | 471 | */ |
280c2a77 | 472 | protected setupHook (): void { |
d99ba5a8 | 473 | // Intentionally empty |
280c2a77 | 474 | } |
c97c7edb | 475 | |
729c563d | 476 | /** |
280c2a77 S |
477 | * Should return whether the worker is the main worker or not. |
478 | */ | |
479 | protected abstract isMain (): boolean | |
480 | ||
481 | /** | |
2e81254d | 482 | * Hook executed before the worker task execution. |
bf9549ae | 483 | * Can be overridden. |
729c563d | 484 | * |
f06e48d8 | 485 | * @param workerNodeKey - The worker node key. |
1c6fe997 | 486 | * @param task - The task to execute. |
729c563d | 487 | */ |
1c6fe997 JB |
488 | protected beforeTaskExecutionHook ( |
489 | workerNodeKey: number, | |
490 | task: Task<Data> | |
491 | ): void { | |
465b2940 | 492 | const workerUsage = this.workerNodes[workerNodeKey].usage |
1c6fe997 JB |
493 | ++workerUsage.tasks.executing |
494 | this.updateWaitTimeWorkerUsage(workerUsage, task) | |
c97c7edb S |
495 | } |
496 | ||
c01733f1 | 497 | /** |
2e81254d | 498 | * Hook executed after the worker task execution. |
bf9549ae | 499 | * Can be overridden. |
c01733f1 | 500 | * |
c923ce56 | 501 | * @param worker - The worker. |
38e795c1 | 502 | * @param message - The received message. |
c01733f1 | 503 | */ |
2e81254d | 504 | protected afterTaskExecutionHook ( |
c923ce56 | 505 | worker: Worker, |
2740a743 | 506 | message: MessageValue<Response> |
bf9549ae | 507 | ): void { |
465b2940 | 508 | const workerUsage = this.workerNodes[this.getWorkerNodeKey(worker)].usage |
f1c06930 JB |
509 | this.updateTaskStatisticsWorkerUsage(workerUsage, message) |
510 | this.updateRunTimeWorkerUsage(workerUsage, message) | |
511 | this.updateEluWorkerUsage(workerUsage, message) | |
512 | } | |
513 | ||
514 | private updateTaskStatisticsWorkerUsage ( | |
515 | workerUsage: WorkerUsage, | |
516 | message: MessageValue<Response> | |
517 | ): void { | |
a4e07f72 JB |
518 | const workerTaskStatistics = workerUsage.tasks |
519 | --workerTaskStatistics.executing | |
520 | ++workerTaskStatistics.executed | |
82f36766 | 521 | if (message.taskError != null) { |
a4e07f72 | 522 | ++workerTaskStatistics.failed |
2740a743 | 523 | } |
f8eb0a2a JB |
524 | } |
525 | ||
a4e07f72 JB |
526 | private updateRunTimeWorkerUsage ( |
527 | workerUsage: WorkerUsage, | |
f8eb0a2a JB |
528 | message: MessageValue<Response> |
529 | ): void { | |
87de9ff5 JB |
530 | if ( |
531 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime | |
932fc8be | 532 | .aggregate |
87de9ff5 | 533 | ) { |
932fc8be | 534 | workerUsage.runTime.aggregate += message.taskPerformance?.runTime ?? 0 |
c6bd2650 | 535 | if ( |
932fc8be JB |
536 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime |
537 | .average && | |
a4e07f72 | 538 | workerUsage.tasks.executed !== 0 |
c6bd2650 | 539 | ) { |
a4e07f72 | 540 | workerUsage.runTime.average = |
f1c06930 JB |
541 | workerUsage.runTime.aggregate / |
542 | (workerUsage.tasks.executed - workerUsage.tasks.failed) | |
3032893a | 543 | } |
3fa4cdd2 | 544 | if ( |
932fc8be JB |
545 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime |
546 | .median && | |
d715b7bc | 547 | message.taskPerformance?.runTime != null |
3fa4cdd2 | 548 | ) { |
a4e07f72 JB |
549 | workerUsage.runTime.history.push(message.taskPerformance.runTime) |
550 | workerUsage.runTime.median = median(workerUsage.runTime.history) | |
78099a15 | 551 | } |
3032893a | 552 | } |
f8eb0a2a JB |
553 | } |
554 | ||
a4e07f72 JB |
555 | private updateWaitTimeWorkerUsage ( |
556 | workerUsage: WorkerUsage, | |
1c6fe997 | 557 | task: Task<Data> |
f8eb0a2a | 558 | ): void { |
1c6fe997 JB |
559 | const timestamp = performance.now() |
560 | const taskWaitTime = timestamp - (task.timestamp ?? timestamp) | |
87de9ff5 JB |
561 | if ( |
562 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime | |
932fc8be | 563 | .aggregate |
87de9ff5 | 564 | ) { |
932fc8be | 565 | workerUsage.waitTime.aggregate += taskWaitTime ?? 0 |
09a6305f | 566 | if ( |
87de9ff5 | 567 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements() |
932fc8be | 568 | .waitTime.average && |
a4e07f72 | 569 | workerUsage.tasks.executed !== 0 |
09a6305f | 570 | ) { |
a4e07f72 | 571 | workerUsage.waitTime.average = |
f1c06930 JB |
572 | workerUsage.waitTime.aggregate / |
573 | (workerUsage.tasks.executed - workerUsage.tasks.failed) | |
09a6305f JB |
574 | } |
575 | if ( | |
87de9ff5 | 576 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements() |
932fc8be | 577 | .waitTime.median && |
1c6fe997 | 578 | taskWaitTime != null |
09a6305f | 579 | ) { |
1c6fe997 | 580 | workerUsage.waitTime.history.push(taskWaitTime) |
a4e07f72 | 581 | workerUsage.waitTime.median = median(workerUsage.waitTime.history) |
09a6305f | 582 | } |
0567595a | 583 | } |
c01733f1 | 584 | } |
585 | ||
a4e07f72 | 586 | private updateEluWorkerUsage ( |
5df69fab | 587 | workerUsage: WorkerUsage, |
62c15a68 JB |
588 | message: MessageValue<Response> |
589 | ): void { | |
5df69fab JB |
590 | if ( |
591 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu | |
592 | .aggregate | |
593 | ) { | |
594 | if (workerUsage.elu != null && message.taskPerformance?.elu != null) { | |
9adcefab JB |
595 | workerUsage.elu.idle.aggregate += message.taskPerformance.elu.idle |
596 | workerUsage.elu.active.aggregate += message.taskPerformance.elu.active | |
5df69fab JB |
597 | workerUsage.elu.utilization = |
598 | (workerUsage.elu.utilization + | |
599 | message.taskPerformance.elu.utilization) / | |
600 | 2 | |
601 | } else if (message.taskPerformance?.elu != null) { | |
602 | workerUsage.elu.idle.aggregate = message.taskPerformance.elu.idle | |
603 | workerUsage.elu.active.aggregate = message.taskPerformance.elu.active | |
604 | workerUsage.elu.utilization = message.taskPerformance.elu.utilization | |
605 | } | |
d715b7bc | 606 | if ( |
5df69fab JB |
607 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu |
608 | .average && | |
609 | workerUsage.tasks.executed !== 0 | |
610 | ) { | |
f1c06930 JB |
611 | const executedTasks = |
612 | workerUsage.tasks.executed - workerUsage.tasks.failed | |
5df69fab | 613 | workerUsage.elu.idle.average = |
f1c06930 | 614 | workerUsage.elu.idle.aggregate / executedTasks |
5df69fab | 615 | workerUsage.elu.active.average = |
f1c06930 | 616 | workerUsage.elu.active.aggregate / executedTasks |
5df69fab JB |
617 | } |
618 | if ( | |
619 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu | |
620 | .median && | |
d715b7bc JB |
621 | message.taskPerformance?.elu != null |
622 | ) { | |
5df69fab JB |
623 | workerUsage.elu.idle.history.push(message.taskPerformance.elu.idle) |
624 | workerUsage.elu.active.history.push(message.taskPerformance.elu.active) | |
625 | workerUsage.elu.idle.median = median(workerUsage.elu.idle.history) | |
626 | workerUsage.elu.active.median = median(workerUsage.elu.active.history) | |
62c15a68 JB |
627 | } |
628 | } | |
629 | } | |
630 | ||
280c2a77 | 631 | /** |
f06e48d8 | 632 | * Chooses a worker node for the next task. |
280c2a77 | 633 | * |
6c6afb84 | 634 | * The default worker choice strategy uses a round robin algorithm to distribute the tasks. |
280c2a77 | 635 | * |
20dcad1a | 636 | * @returns The worker node key |
280c2a77 | 637 | */ |
6c6afb84 | 638 | private chooseWorkerNode (): number { |
930dcf12 | 639 | if (this.shallCreateDynamicWorker()) { |
6c6afb84 JB |
640 | const worker = this.createAndSetupDynamicWorker() |
641 | if ( | |
642 | this.workerChoiceStrategyContext.getStrategyPolicy().useDynamicWorker | |
643 | ) { | |
644 | return this.getWorkerNodeKey(worker) | |
645 | } | |
17393ac8 | 646 | } |
930dcf12 JB |
647 | return this.workerChoiceStrategyContext.execute() |
648 | } | |
649 | ||
6c6afb84 JB |
650 | /** |
651 | * Conditions for dynamic worker creation. | |
652 | * | |
653 | * @returns Whether to create a dynamic worker or not. | |
654 | */ | |
655 | private shallCreateDynamicWorker (): boolean { | |
930dcf12 | 656 | return this.type === PoolTypes.dynamic && !this.full && this.internalBusy() |
c97c7edb S |
657 | } |
658 | ||
280c2a77 | 659 | /** |
675bb809 | 660 | * Sends a message to the given worker. |
280c2a77 | 661 | * |
38e795c1 JB |
662 | * @param worker - The worker which should receive the message. |
663 | * @param message - The message. | |
280c2a77 S |
664 | */ |
665 | protected abstract sendToWorker ( | |
666 | worker: Worker, | |
667 | message: MessageValue<Data> | |
668 | ): void | |
669 | ||
4a6952ff | 670 | /** |
f06e48d8 | 671 | * Registers a listener callback on the given worker. |
4a6952ff | 672 | * |
38e795c1 JB |
673 | * @param worker - The worker which should register a listener. |
674 | * @param listener - The message listener callback. | |
4a6952ff | 675 | */ |
e102732c JB |
676 | private registerWorkerMessageListener<Message extends Data | Response>( |
677 | worker: Worker, | |
678 | listener: (message: MessageValue<Message>) => void | |
679 | ): void { | |
680 | worker.on('message', listener as MessageHandler<Worker>) | |
681 | } | |
c97c7edb | 682 | |
729c563d | 683 | /** |
41344292 | 684 | * Creates a new worker. |
6c6afb84 JB |
685 | * |
686 | * @returns Newly created worker. | |
729c563d | 687 | */ |
280c2a77 | 688 | protected abstract createWorker (): Worker |
c97c7edb | 689 | |
729c563d | 690 | /** |
f06e48d8 | 691 | * Function that can be hooked up when a worker has been newly created and moved to the pool worker nodes. |
6677a3d3 | 692 | * Can be overridden. |
729c563d | 693 | * |
38e795c1 | 694 | * @param worker - The newly created worker. |
729c563d | 695 | */ |
6677a3d3 | 696 | protected afterWorkerSetup (worker: Worker): void { |
e102732c JB |
697 | // Listen to worker messages. |
698 | this.registerWorkerMessageListener(worker, this.workerListener()) | |
699 | } | |
c97c7edb | 700 | |
4a6952ff | 701 | /** |
f06e48d8 | 702 | * Creates a new worker and sets it up completely in the pool worker nodes. |
4a6952ff JB |
703 | * |
704 | * @returns New, completely set up worker. | |
705 | */ | |
706 | protected createAndSetupWorker (): Worker { | |
bdacc2d2 | 707 | const worker = this.createWorker() |
280c2a77 | 708 | |
35cf1c03 | 709 | worker.on('message', this.opts.messageHandler ?? EMPTY_FUNCTION) |
a35560ba | 710 | worker.on('error', this.opts.errorHandler ?? EMPTY_FUNCTION) |
1f68cede JB |
711 | worker.on('error', error => { |
712 | if (this.emitter != null) { | |
713 | this.emitter.emit(PoolEvents.error, error) | |
714 | } | |
5baee0d7 | 715 | if (this.opts.restartWorkerOnError === true) { |
1f68cede | 716 | this.createAndSetupWorker() |
5baee0d7 JB |
717 | } |
718 | }) | |
a35560ba S |
719 | worker.on('online', this.opts.onlineHandler ?? EMPTY_FUNCTION) |
720 | worker.on('exit', this.opts.exitHandler ?? EMPTY_FUNCTION) | |
a974afa6 | 721 | worker.once('exit', () => { |
f06e48d8 | 722 | this.removeWorkerNode(worker) |
a974afa6 | 723 | }) |
280c2a77 | 724 | |
f06e48d8 | 725 | this.pushWorkerNode(worker) |
280c2a77 | 726 | |
b6b32453 JB |
727 | this.setWorkerStatistics(worker) |
728 | ||
280c2a77 S |
729 | this.afterWorkerSetup(worker) |
730 | ||
c97c7edb S |
731 | return worker |
732 | } | |
be0676b3 | 733 | |
930dcf12 JB |
734 | /** |
735 | * Creates a new dynamic worker and sets it up completely in the pool worker nodes. | |
736 | * | |
737 | * @returns New, completely set up dynamic worker. | |
738 | */ | |
739 | protected createAndSetupDynamicWorker (): Worker { | |
740 | const worker = this.createAndSetupWorker() | |
741 | this.registerWorkerMessageListener(worker, message => { | |
e8b3a5ab | 742 | const workerNodeKey = this.getWorkerNodeKey(worker) |
930dcf12 JB |
743 | if ( |
744 | isKillBehavior(KillBehaviors.HARD, message.kill) || | |
7b56f532 JB |
745 | (message.kill != null && |
746 | ((this.opts.enableTasksQueue === false && | |
465b2940 | 747 | this.workerNodes[workerNodeKey].usage.tasks.executing === 0) || |
7b56f532 | 748 | (this.opts.enableTasksQueue === true && |
465b2940 | 749 | this.workerNodes[workerNodeKey].usage.tasks.executing === 0 && |
e8b3a5ab | 750 | this.tasksQueueSize(workerNodeKey) === 0))) |
930dcf12 JB |
751 | ) { |
752 | // Kill message received from the worker: no new tasks are submitted to that worker for a while ( > maxInactiveTime) | |
930dcf12 JB |
753 | void (this.destroyWorker(worker) as Promise<void>) |
754 | } | |
755 | }) | |
756 | return worker | |
757 | } | |
758 | ||
be0676b3 | 759 | /** |
ff733df7 | 760 | * This function is the listener registered for each worker message. |
be0676b3 | 761 | * |
bdacc2d2 | 762 | * @returns The listener function to execute when a message is received from a worker. |
be0676b3 APA |
763 | */ |
764 | protected workerListener (): (message: MessageValue<Response>) => void { | |
4a6952ff | 765 | return message => { |
b1989cfd | 766 | if (message.id != null) { |
a3445496 | 767 | // Task execution response received |
2740a743 | 768 | const promiseResponse = this.promiseResponseMap.get(message.id) |
b1989cfd | 769 | if (promiseResponse != null) { |
82f36766 | 770 | if (message.taskError != null) { |
91ee39ed | 771 | if (this.emitter != null) { |
82f36766 | 772 | this.emitter.emit(PoolEvents.taskError, message.taskError) |
91ee39ed | 773 | } |
cd9580e7 | 774 | promiseResponse.reject(message.taskError.message) |
a05c10de | 775 | } else { |
2740a743 | 776 | promiseResponse.resolve(message.data as Response) |
a05c10de | 777 | } |
2e81254d | 778 | this.afterTaskExecutionHook(promiseResponse.worker, message) |
2740a743 | 779 | this.promiseResponseMap.delete(message.id) |
ff733df7 JB |
780 | const workerNodeKey = this.getWorkerNodeKey(promiseResponse.worker) |
781 | if ( | |
782 | this.opts.enableTasksQueue === true && | |
416fd65c | 783 | this.tasksQueueSize(workerNodeKey) > 0 |
ff733df7 | 784 | ) { |
2e81254d JB |
785 | this.executeTask( |
786 | workerNodeKey, | |
ff733df7 JB |
787 | this.dequeueTask(workerNodeKey) as Task<Data> |
788 | ) | |
789 | } | |
e5536a06 | 790 | this.workerChoiceStrategyContext.update(workerNodeKey) |
be0676b3 APA |
791 | } |
792 | } | |
793 | } | |
be0676b3 | 794 | } |
7c0ba920 | 795 | |
ff733df7 | 796 | private checkAndEmitEvents (): void { |
1f68cede | 797 | if (this.emitter != null) { |
ff733df7 | 798 | if (this.busy) { |
6b27d407 | 799 | this.emitter?.emit(PoolEvents.busy, this.info) |
ff733df7 | 800 | } |
6b27d407 JB |
801 | if (this.type === PoolTypes.dynamic && this.full) { |
802 | this.emitter?.emit(PoolEvents.full, this.info) | |
ff733df7 | 803 | } |
164d950a JB |
804 | } |
805 | } | |
806 | ||
0ebe2a9f JB |
807 | /** |
808 | * Sets the given worker node its tasks usage in the pool. | |
809 | * | |
810 | * @param workerNode - The worker node. | |
a4e07f72 | 811 | * @param workerUsage - The worker usage. |
0ebe2a9f JB |
812 | */ |
813 | private setWorkerNodeTasksUsage ( | |
814 | workerNode: WorkerNode<Worker, Data>, | |
a4e07f72 | 815 | workerUsage: WorkerUsage |
0ebe2a9f | 816 | ): void { |
465b2940 | 817 | workerNode.usage = workerUsage |
0ebe2a9f JB |
818 | } |
819 | ||
a05c10de | 820 | /** |
f06e48d8 | 821 | * Pushes the given worker in the pool worker nodes. |
ea7a90d3 | 822 | * |
38e795c1 | 823 | * @param worker - The worker. |
f06e48d8 | 824 | * @returns The worker nodes length. |
ea7a90d3 | 825 | */ |
f06e48d8 | 826 | private pushWorkerNode (worker: Worker): number { |
9c16fb4b | 827 | this.workerNodes.push({ |
ffcbbad8 | 828 | worker, |
465b2940 | 829 | usage: this.getWorkerUsage(), |
29ee7e9a | 830 | tasksQueue: new Queue<Task<Data>>() |
ea7a90d3 | 831 | }) |
9c16fb4b JB |
832 | const workerNodeKey = this.getWorkerNodeKey(worker) |
833 | this.setWorkerNodeTasksUsage( | |
834 | this.workerNodes[workerNodeKey], | |
835 | this.getWorkerUsage(workerNodeKey) | |
836 | ) | |
837 | return this.workerNodes.length | |
ea7a90d3 | 838 | } |
c923ce56 | 839 | |
8604aaab JB |
840 | // /** |
841 | // * Sets the given worker in the pool worker nodes. | |
842 | // * | |
843 | // * @param workerNodeKey - The worker node key. | |
844 | // * @param worker - The worker. | |
845 | // * @param workerUsage - The worker usage. | |
846 | // * @param tasksQueue - The worker task queue. | |
847 | // */ | |
848 | // private setWorkerNode ( | |
849 | // workerNodeKey: number, | |
850 | // worker: Worker, | |
851 | // workerUsage: WorkerUsage, | |
852 | // tasksQueue: Queue<Task<Data>> | |
853 | // ): void { | |
854 | // this.workerNodes[workerNodeKey] = { | |
855 | // worker, | |
465b2940 | 856 | // usage: workerUsage, |
8604aaab JB |
857 | // tasksQueue |
858 | // } | |
859 | // } | |
51fe3d3c JB |
860 | |
861 | /** | |
f06e48d8 | 862 | * Removes the given worker from the pool worker nodes. |
51fe3d3c | 863 | * |
f06e48d8 | 864 | * @param worker - The worker. |
51fe3d3c | 865 | */ |
416fd65c | 866 | private removeWorkerNode (worker: Worker): void { |
f06e48d8 | 867 | const workerNodeKey = this.getWorkerNodeKey(worker) |
1f68cede JB |
868 | if (workerNodeKey !== -1) { |
869 | this.workerNodes.splice(workerNodeKey, 1) | |
870 | this.workerChoiceStrategyContext.remove(workerNodeKey) | |
871 | } | |
51fe3d3c | 872 | } |
adc3c320 | 873 | |
2e81254d | 874 | private executeTask (workerNodeKey: number, task: Task<Data>): void { |
1c6fe997 | 875 | this.beforeTaskExecutionHook(workerNodeKey, task) |
2e81254d JB |
876 | this.sendToWorker(this.workerNodes[workerNodeKey].worker, task) |
877 | } | |
878 | ||
f9f00b5f | 879 | private enqueueTask (workerNodeKey: number, task: Task<Data>): number { |
29ee7e9a | 880 | return this.workerNodes[workerNodeKey].tasksQueue.enqueue(task) |
adc3c320 JB |
881 | } |
882 | ||
416fd65c | 883 | private dequeueTask (workerNodeKey: number): Task<Data> | undefined { |
29ee7e9a | 884 | return this.workerNodes[workerNodeKey].tasksQueue.dequeue() |
adc3c320 JB |
885 | } |
886 | ||
416fd65c | 887 | private tasksQueueSize (workerNodeKey: number): number { |
4d8bf9e4 | 888 | return this.workerNodes[workerNodeKey].tasksQueue.size |
adc3c320 | 889 | } |
ff733df7 | 890 | |
df593701 JB |
891 | private tasksMaxQueueSize (workerNodeKey: number): number { |
892 | return this.workerNodes[workerNodeKey].tasksQueue.maxSize | |
893 | } | |
894 | ||
416fd65c JB |
895 | private flushTasksQueue (workerNodeKey: number): void { |
896 | if (this.tasksQueueSize(workerNodeKey) > 0) { | |
29ee7e9a JB |
897 | for (let i = 0; i < this.tasksQueueSize(workerNodeKey); i++) { |
898 | this.executeTask( | |
899 | workerNodeKey, | |
900 | this.dequeueTask(workerNodeKey) as Task<Data> | |
901 | ) | |
ff733df7 | 902 | } |
ff733df7 | 903 | } |
df593701 | 904 | this.workerNodes[workerNodeKey].tasksQueue.clear() |
ff733df7 JB |
905 | } |
906 | ||
ef41a6e6 JB |
907 | private flushTasksQueues (): void { |
908 | for (const [workerNodeKey] of this.workerNodes.entries()) { | |
909 | this.flushTasksQueue(workerNodeKey) | |
910 | } | |
911 | } | |
b6b32453 JB |
912 | |
913 | private setWorkerStatistics (worker: Worker): void { | |
914 | this.sendToWorker(worker, { | |
915 | statistics: { | |
87de9ff5 JB |
916 | runTime: |
917 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements() | |
932fc8be | 918 | .runTime.aggregate, |
87de9ff5 | 919 | elu: this.workerChoiceStrategyContext.getTaskStatisticsRequirements() |
5df69fab | 920 | .elu.aggregate |
b6b32453 JB |
921 | } |
922 | }) | |
923 | } | |
8604aaab | 924 | |
9c16fb4b | 925 | private getWorkerUsage (workerNodeKey?: number): WorkerUsage { |
e3347a5c JB |
926 | const getTasksQueueSize = (workerNodeKey?: number): number => { |
927 | return workerNodeKey != null ? this.tasksQueueSize(workerNodeKey) : 0 | |
9c16fb4b | 928 | } |
df593701 JB |
929 | const getTasksMaxQueueSize = (workerNodeKey?: number): number => { |
930 | return workerNodeKey != null ? this.tasksMaxQueueSize(workerNodeKey) : 0 | |
931 | } | |
8604aaab | 932 | return { |
9c16fb4b JB |
933 | tasks: { |
934 | executed: 0, | |
935 | executing: 0, | |
936 | get queued (): number { | |
e3347a5c | 937 | return getTasksQueueSize(workerNodeKey) |
9c16fb4b | 938 | }, |
df593701 JB |
939 | get maxQueued (): number { |
940 | return getTasksMaxQueueSize(workerNodeKey) | |
941 | }, | |
9c16fb4b JB |
942 | failed: 0 |
943 | }, | |
8604aaab | 944 | runTime: { |
932fc8be | 945 | aggregate: 0, |
8604aaab JB |
946 | average: 0, |
947 | median: 0, | |
948 | history: new CircularArray() | |
949 | }, | |
950 | waitTime: { | |
932fc8be | 951 | aggregate: 0, |
8604aaab JB |
952 | average: 0, |
953 | median: 0, | |
954 | history: new CircularArray() | |
955 | }, | |
5df69fab JB |
956 | elu: { |
957 | idle: { | |
958 | aggregate: 0, | |
959 | average: 0, | |
960 | median: 0, | |
961 | history: new CircularArray() | |
962 | }, | |
963 | active: { | |
964 | aggregate: 0, | |
965 | average: 0, | |
966 | median: 0, | |
967 | history: new CircularArray() | |
968 | }, | |
969 | utilization: 0 | |
970 | } | |
8604aaab JB |
971 | } |
972 | } | |
c97c7edb | 973 | } |