| 1 | import type { Worker } from 'node:cluster' |
| 2 | import { performance } from 'node:perf_hooks' |
| 3 | import type { MessagePort } from 'node:worker_threads' |
| 4 | |
| 5 | import type { |
| 6 | MessageValue, |
| 7 | Task, |
| 8 | TaskFunctionProperties, |
| 9 | TaskPerformance, |
| 10 | WorkerStatistics |
| 11 | } from '../utility-types.js' |
| 12 | import { |
| 13 | buildTaskFunctionProperties, |
| 14 | DEFAULT_TASK_NAME, |
| 15 | EMPTY_FUNCTION, |
| 16 | isAsyncFunction, |
| 17 | isPlainObject |
| 18 | } from '../utils.js' |
| 19 | import type { |
| 20 | TaskAsyncFunction, |
| 21 | TaskFunction, |
| 22 | TaskFunctionObject, |
| 23 | TaskFunctionOperationResult, |
| 24 | TaskFunctions, |
| 25 | TaskSyncFunction |
| 26 | } from './task-functions.js' |
| 27 | import { |
| 28 | checkTaskFunctionName, |
| 29 | checkValidTaskFunctionObjectEntry, |
| 30 | checkValidWorkerOptions |
| 31 | } from './utils.js' |
| 32 | import { KillBehaviors, type WorkerOptions } from './worker-options.js' |
| 33 | |
| 34 | const DEFAULT_MAX_INACTIVE_TIME = 60000 |
| 35 | const DEFAULT_WORKER_OPTIONS: WorkerOptions = { |
| 36 | /** |
| 37 | * The kill behavior option on this worker or its default value. |
| 38 | */ |
| 39 | killBehavior: KillBehaviors.SOFT, |
| 40 | /** |
| 41 | * The maximum time to keep this worker active while idle. |
| 42 | * The pool automatically checks and terminates this worker when the time expires. |
| 43 | */ |
| 44 | maxInactiveTime: DEFAULT_MAX_INACTIVE_TIME, |
| 45 | /** |
| 46 | * The function to call when the worker is killed. |
| 47 | */ |
| 48 | killHandler: EMPTY_FUNCTION |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * Base class that implements some shared logic for all poolifier workers. |
| 53 | * |
| 54 | * @typeParam MainWorker - Type of main worker. |
| 55 | * @typeParam Data - Type of data this worker receives from pool's execution. This can only be structured-cloneable data. |
| 56 | * @typeParam Response - Type of response the worker sends back to the main worker. This can only be structured-cloneable data. |
| 57 | */ |
| 58 | export abstract class AbstractWorker< |
| 59 | MainWorker extends Worker | MessagePort, |
| 60 | Data = unknown, |
| 61 | Response = unknown |
| 62 | > { |
| 63 | /** |
| 64 | * Worker id. |
| 65 | */ |
| 66 | protected abstract id: number |
| 67 | /** |
| 68 | * Task function object(s) processed by the worker when the pool's `execution` function is invoked. |
| 69 | */ |
| 70 | protected taskFunctions!: Map<string, TaskFunctionObject<Data, Response>> |
| 71 | /** |
| 72 | * Timestamp of the last task processed by this worker. |
| 73 | */ |
| 74 | protected lastTaskTimestamp!: number |
| 75 | /** |
| 76 | * Performance statistics computation requirements. |
| 77 | */ |
| 78 | protected statistics?: WorkerStatistics |
| 79 | /** |
| 80 | * Handler id of the `activeInterval` worker activity check. |
| 81 | */ |
| 82 | protected activeInterval?: NodeJS.Timeout |
| 83 | |
| 84 | /** |
| 85 | * Constructs a new poolifier worker. |
| 86 | * |
| 87 | * @param isMain - Whether this is the main worker or not. |
| 88 | * @param mainWorker - Reference to main worker. |
| 89 | * @param taskFunctions - Task function(s) processed by the worker when the pool's `execution` function is invoked. The first function is the default function. |
| 90 | * @param opts - Options for the worker. |
| 91 | */ |
| 92 | public constructor ( |
| 93 | protected readonly isMain: boolean | undefined, |
| 94 | private readonly mainWorker: MainWorker | undefined | null, |
| 95 | taskFunctions: TaskFunction<Data, Response> | TaskFunctions<Data, Response>, |
| 96 | protected opts: WorkerOptions = DEFAULT_WORKER_OPTIONS |
| 97 | ) { |
| 98 | if (this.isMain == null) { |
| 99 | throw new Error('isMain parameter is mandatory') |
| 100 | } |
| 101 | this.checkTaskFunctions(taskFunctions) |
| 102 | this.checkWorkerOptions(this.opts) |
| 103 | if (!this.isMain) { |
| 104 | // Should be once() but Node.js on windows has a bug that prevents it from working |
| 105 | this.getMainWorker().on('message', this.handleReadyMessage.bind(this)) |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | private checkWorkerOptions (opts: WorkerOptions): void { |
| 110 | checkValidWorkerOptions(opts) |
| 111 | this.opts = { ...DEFAULT_WORKER_OPTIONS, ...opts } |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * Checks if the `taskFunctions` parameter is passed to the constructor and valid. |
| 116 | * |
| 117 | * @param taskFunctions - The task function(s) parameter that should be checked. |
| 118 | */ |
| 119 | private checkTaskFunctions ( |
| 120 | taskFunctions: |
| 121 | | TaskFunction<Data, Response> |
| 122 | | TaskFunctions<Data, Response> |
| 123 | | undefined |
| 124 | ): void { |
| 125 | if (taskFunctions == null) { |
| 126 | throw new Error('taskFunctions parameter is mandatory') |
| 127 | } |
| 128 | this.taskFunctions = new Map<string, TaskFunctionObject<Data, Response>>() |
| 129 | if (typeof taskFunctions === 'function') { |
| 130 | const fnObj = { taskFunction: taskFunctions.bind(this) } |
| 131 | this.taskFunctions.set(DEFAULT_TASK_NAME, fnObj) |
| 132 | this.taskFunctions.set( |
| 133 | typeof taskFunctions.name === 'string' && |
| 134 | taskFunctions.name.trim().length > 0 |
| 135 | ? taskFunctions.name |
| 136 | : 'fn1', |
| 137 | fnObj |
| 138 | ) |
| 139 | } else if (isPlainObject(taskFunctions)) { |
| 140 | let firstEntry = true |
| 141 | for (let [name, fnObj] of Object.entries(taskFunctions)) { |
| 142 | if (typeof fnObj === 'function') { |
| 143 | fnObj = { taskFunction: fnObj } satisfies TaskFunctionObject< |
| 144 | Data, |
| 145 | Response |
| 146 | > |
| 147 | } |
| 148 | checkValidTaskFunctionObjectEntry<Data, Response>(name, fnObj) |
| 149 | fnObj.taskFunction = fnObj.taskFunction.bind(this) |
| 150 | if (firstEntry) { |
| 151 | this.taskFunctions.set(DEFAULT_TASK_NAME, fnObj) |
| 152 | firstEntry = false |
| 153 | } |
| 154 | this.taskFunctions.set(name, fnObj) |
| 155 | } |
| 156 | if (firstEntry) { |
| 157 | throw new Error('taskFunctions parameter object is empty') |
| 158 | } |
| 159 | } else { |
| 160 | throw new TypeError( |
| 161 | 'taskFunctions parameter is not a function or a plain object' |
| 162 | ) |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * Checks if the worker has a task function with the given name. |
| 168 | * |
| 169 | * @param name - The name of the task function to check. |
| 170 | * @returns Whether the worker has a task function with the given name or not. |
| 171 | */ |
| 172 | public hasTaskFunction (name: string): TaskFunctionOperationResult { |
| 173 | try { |
| 174 | checkTaskFunctionName(name) |
| 175 | } catch (error) { |
| 176 | return { status: false, error: error as Error } |
| 177 | } |
| 178 | return { status: this.taskFunctions.has(name) } |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * Adds a task function to the worker. |
| 183 | * If a task function with the same name already exists, it is replaced. |
| 184 | * |
| 185 | * @param name - The name of the task function to add. |
| 186 | * @param fn - The task function to add. |
| 187 | * @returns Whether the task function was added or not. |
| 188 | */ |
| 189 | public addTaskFunction ( |
| 190 | name: string, |
| 191 | fn: TaskFunction<Data, Response> | TaskFunctionObject<Data, Response> |
| 192 | ): TaskFunctionOperationResult { |
| 193 | try { |
| 194 | checkTaskFunctionName(name) |
| 195 | if (name === DEFAULT_TASK_NAME) { |
| 196 | throw new Error( |
| 197 | 'Cannot add a task function with the default reserved name' |
| 198 | ) |
| 199 | } |
| 200 | if (typeof fn === 'function') { |
| 201 | fn = { taskFunction: fn } satisfies TaskFunctionObject<Data, Response> |
| 202 | } |
| 203 | checkValidTaskFunctionObjectEntry<Data, Response>(name, fn) |
| 204 | fn.taskFunction = fn.taskFunction.bind(this) |
| 205 | if ( |
| 206 | this.taskFunctions.get(name) === |
| 207 | this.taskFunctions.get(DEFAULT_TASK_NAME) |
| 208 | ) { |
| 209 | this.taskFunctions.set(DEFAULT_TASK_NAME, fn) |
| 210 | } |
| 211 | this.taskFunctions.set(name, fn) |
| 212 | this.sendTaskFunctionsPropertiesToMainWorker() |
| 213 | return { status: true } |
| 214 | } catch (error) { |
| 215 | return { status: false, error: error as Error } |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * Removes a task function from the worker. |
| 221 | * |
| 222 | * @param name - The name of the task function to remove. |
| 223 | * @returns Whether the task function existed and was removed or not. |
| 224 | */ |
| 225 | public removeTaskFunction (name: string): TaskFunctionOperationResult { |
| 226 | try { |
| 227 | checkTaskFunctionName(name) |
| 228 | if (name === DEFAULT_TASK_NAME) { |
| 229 | throw new Error( |
| 230 | 'Cannot remove the task function with the default reserved name' |
| 231 | ) |
| 232 | } |
| 233 | if ( |
| 234 | this.taskFunctions.get(name) === |
| 235 | this.taskFunctions.get(DEFAULT_TASK_NAME) |
| 236 | ) { |
| 237 | throw new Error( |
| 238 | 'Cannot remove the task function used as the default task function' |
| 239 | ) |
| 240 | } |
| 241 | const deleteStatus = this.taskFunctions.delete(name) |
| 242 | this.sendTaskFunctionsPropertiesToMainWorker() |
| 243 | return { status: deleteStatus } |
| 244 | } catch (error) { |
| 245 | return { status: false, error: error as Error } |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Lists the properties of the worker's task functions. |
| 251 | * |
| 252 | * @returns The properties of the worker's task functions. |
| 253 | */ |
| 254 | public listTaskFunctionsProperties (): TaskFunctionProperties[] { |
| 255 | let defaultTaskFunctionName = DEFAULT_TASK_NAME |
| 256 | for (const [name, fnObj] of this.taskFunctions) { |
| 257 | if ( |
| 258 | name !== DEFAULT_TASK_NAME && |
| 259 | fnObj === this.taskFunctions.get(DEFAULT_TASK_NAME) |
| 260 | ) { |
| 261 | defaultTaskFunctionName = name |
| 262 | break |
| 263 | } |
| 264 | } |
| 265 | const taskFunctionsProperties: TaskFunctionProperties[] = [] |
| 266 | for (const [name, fnObj] of this.taskFunctions) { |
| 267 | if (name === DEFAULT_TASK_NAME || name === defaultTaskFunctionName) { |
| 268 | continue |
| 269 | } |
| 270 | taskFunctionsProperties.push(buildTaskFunctionProperties(name, fnObj)) |
| 271 | } |
| 272 | return [ |
| 273 | buildTaskFunctionProperties( |
| 274 | DEFAULT_TASK_NAME, |
| 275 | this.taskFunctions.get(DEFAULT_TASK_NAME) |
| 276 | ), |
| 277 | buildTaskFunctionProperties( |
| 278 | defaultTaskFunctionName, |
| 279 | this.taskFunctions.get(defaultTaskFunctionName) |
| 280 | ), |
| 281 | ...taskFunctionsProperties |
| 282 | ] |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * Sets the default task function to use in the worker. |
| 287 | * |
| 288 | * @param name - The name of the task function to use as default task function. |
| 289 | * @returns Whether the default task function was set or not. |
| 290 | */ |
| 291 | public setDefaultTaskFunction (name: string): TaskFunctionOperationResult { |
| 292 | try { |
| 293 | checkTaskFunctionName(name) |
| 294 | if (name === DEFAULT_TASK_NAME) { |
| 295 | throw new Error( |
| 296 | 'Cannot set the default task function reserved name as the default task function' |
| 297 | ) |
| 298 | } |
| 299 | if (!this.taskFunctions.has(name)) { |
| 300 | throw new Error( |
| 301 | 'Cannot set the default task function to a non-existing task function' |
| 302 | ) |
| 303 | } |
| 304 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
| 305 | this.taskFunctions.set(DEFAULT_TASK_NAME, this.taskFunctions.get(name)!) |
| 306 | this.sendTaskFunctionsPropertiesToMainWorker() |
| 307 | return { status: true } |
| 308 | } catch (error) { |
| 309 | return { status: false, error: error as Error } |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | /** |
| 314 | * Handles the ready message sent by the main worker. |
| 315 | * |
| 316 | * @param message - The ready message. |
| 317 | */ |
| 318 | protected abstract handleReadyMessage (message: MessageValue<Data>): void |
| 319 | |
| 320 | /** |
| 321 | * Worker message listener. |
| 322 | * |
| 323 | * @param message - The received message. |
| 324 | */ |
| 325 | protected messageListener (message: MessageValue<Data>): void { |
| 326 | this.checkMessageWorkerId(message) |
| 327 | const { |
| 328 | statistics, |
| 329 | checkActive, |
| 330 | taskFunctionOperation, |
| 331 | taskId, |
| 332 | data, |
| 333 | kill |
| 334 | } = message |
| 335 | if (statistics != null) { |
| 336 | // Statistics message received |
| 337 | this.statistics = statistics |
| 338 | } else if (checkActive != null) { |
| 339 | // Check active message received |
| 340 | checkActive ? this.startCheckActive() : this.stopCheckActive() |
| 341 | } else if (taskFunctionOperation != null) { |
| 342 | // Task function operation message received |
| 343 | this.handleTaskFunctionOperationMessage(message) |
| 344 | } else if (taskId != null && data != null) { |
| 345 | // Task message received |
| 346 | this.run(message) |
| 347 | } else if (kill === true) { |
| 348 | // Kill message received |
| 349 | this.handleKillMessage(message) |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | protected handleTaskFunctionOperationMessage ( |
| 354 | message: MessageValue<Data> |
| 355 | ): void { |
| 356 | const { taskFunctionOperation, taskFunctionProperties, taskFunction } = |
| 357 | message |
| 358 | if (taskFunctionProperties == null) { |
| 359 | throw new Error( |
| 360 | 'Cannot handle task function operation message without task function properties' |
| 361 | ) |
| 362 | } |
| 363 | let response: TaskFunctionOperationResult |
| 364 | switch (taskFunctionOperation) { |
| 365 | case 'add': |
| 366 | response = this.addTaskFunction(taskFunctionProperties.name, { |
| 367 | // eslint-disable-next-line @typescript-eslint/no-implied-eval, no-new-func |
| 368 | taskFunction: new Function( |
| 369 | `return ${taskFunction}` |
| 370 | )() as TaskFunction<Data, Response>, |
| 371 | ...(taskFunctionProperties.priority != null && { |
| 372 | priority: taskFunctionProperties.priority |
| 373 | }), |
| 374 | ...(taskFunctionProperties.strategy != null && { |
| 375 | strategy: taskFunctionProperties.strategy |
| 376 | }) |
| 377 | }) |
| 378 | break |
| 379 | case 'remove': |
| 380 | response = this.removeTaskFunction(taskFunctionProperties.name) |
| 381 | break |
| 382 | case 'default': |
| 383 | response = this.setDefaultTaskFunction(taskFunctionProperties.name) |
| 384 | break |
| 385 | default: |
| 386 | response = { status: false, error: new Error('Unknown task operation') } |
| 387 | break |
| 388 | } |
| 389 | this.sendToMainWorker({ |
| 390 | taskFunctionOperation, |
| 391 | taskFunctionOperationStatus: response.status, |
| 392 | taskFunctionProperties, |
| 393 | ...(!response.status && |
| 394 | response.error != null && { |
| 395 | workerError: { |
| 396 | name: taskFunctionProperties.name, |
| 397 | message: this.handleError(response.error as Error | string) |
| 398 | } |
| 399 | }) |
| 400 | }) |
| 401 | } |
| 402 | |
| 403 | /** |
| 404 | * Handles a kill message sent by the main worker. |
| 405 | * |
| 406 | * @param message - The kill message. |
| 407 | */ |
| 408 | protected handleKillMessage (_message: MessageValue<Data>): void { |
| 409 | this.stopCheckActive() |
| 410 | if (isAsyncFunction(this.opts.killHandler)) { |
| 411 | (this.opts.killHandler() as Promise<void>) |
| 412 | .then(() => { |
| 413 | this.sendToMainWorker({ kill: 'success' }) |
| 414 | return undefined |
| 415 | }) |
| 416 | .catch(() => { |
| 417 | this.sendToMainWorker({ kill: 'failure' }) |
| 418 | }) |
| 419 | } else { |
| 420 | try { |
| 421 | // eslint-disable-next-line @typescript-eslint/no-invalid-void-type |
| 422 | this.opts.killHandler?.() as void |
| 423 | this.sendToMainWorker({ kill: 'success' }) |
| 424 | } catch { |
| 425 | this.sendToMainWorker({ kill: 'failure' }) |
| 426 | } |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | /** |
| 431 | * Check if the message worker id is set and matches the worker id. |
| 432 | * |
| 433 | * @param message - The message to check. |
| 434 | * @throws {@link https://nodejs.org/api/errors.html#class-error} If the message worker id is not set or does not match the worker id. |
| 435 | */ |
| 436 | private checkMessageWorkerId (message: MessageValue<Data>): void { |
| 437 | if (message.workerId == null) { |
| 438 | throw new Error('Message worker id is not set') |
| 439 | } else if (message.workerId !== this.id) { |
| 440 | throw new Error( |
| 441 | `Message worker id ${message.workerId} does not match the worker id ${this.id}` |
| 442 | ) |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | /** |
| 447 | * Starts the worker check active interval. |
| 448 | */ |
| 449 | private startCheckActive (): void { |
| 450 | this.lastTaskTimestamp = performance.now() |
| 451 | this.activeInterval = setInterval( |
| 452 | this.checkActive.bind(this), |
| 453 | (this.opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME) / 2 |
| 454 | ) |
| 455 | } |
| 456 | |
| 457 | /** |
| 458 | * Stops the worker check active interval. |
| 459 | */ |
| 460 | private stopCheckActive (): void { |
| 461 | if (this.activeInterval != null) { |
| 462 | clearInterval(this.activeInterval) |
| 463 | delete this.activeInterval |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | /** |
| 468 | * Checks if the worker should be terminated, because its living too long. |
| 469 | */ |
| 470 | private checkActive (): void { |
| 471 | if ( |
| 472 | performance.now() - this.lastTaskTimestamp > |
| 473 | (this.opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME) |
| 474 | ) { |
| 475 | this.sendToMainWorker({ kill: this.opts.killBehavior }) |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | /** |
| 480 | * Returns the main worker. |
| 481 | * |
| 482 | * @returns Reference to the main worker. |
| 483 | * @throws {@link https://nodejs.org/api/errors.html#class-error} If the main worker is not set. |
| 484 | */ |
| 485 | protected getMainWorker (): MainWorker { |
| 486 | if (this.mainWorker == null) { |
| 487 | throw new Error('Main worker not set') |
| 488 | } |
| 489 | return this.mainWorker |
| 490 | } |
| 491 | |
| 492 | /** |
| 493 | * Sends a message to main worker. |
| 494 | * |
| 495 | * @param message - The response message. |
| 496 | */ |
| 497 | protected abstract sendToMainWorker ( |
| 498 | message: MessageValue<Response, Data> |
| 499 | ): void |
| 500 | |
| 501 | /** |
| 502 | * Sends task functions properties to the main worker. |
| 503 | */ |
| 504 | protected sendTaskFunctionsPropertiesToMainWorker (): void { |
| 505 | this.sendToMainWorker({ |
| 506 | taskFunctionsProperties: this.listTaskFunctionsProperties() |
| 507 | }) |
| 508 | } |
| 509 | |
| 510 | /** |
| 511 | * Handles an error and convert it to a string so it can be sent back to the main worker. |
| 512 | * |
| 513 | * @param error - The error raised by the worker. |
| 514 | * @returns The error message. |
| 515 | */ |
| 516 | protected handleError (error: Error | string): string { |
| 517 | return error instanceof Error ? error.message : error |
| 518 | } |
| 519 | |
| 520 | /** |
| 521 | * Runs the given task. |
| 522 | * |
| 523 | * @param task - The task to execute. |
| 524 | */ |
| 525 | protected readonly run = (task: Task<Data>): void => { |
| 526 | const { name, taskId, data } = task |
| 527 | const taskFunctionName = name ?? DEFAULT_TASK_NAME |
| 528 | if (!this.taskFunctions.has(taskFunctionName)) { |
| 529 | this.sendToMainWorker({ |
| 530 | workerError: { |
| 531 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
| 532 | name: name!, |
| 533 | message: `Task function '${name}' not found`, |
| 534 | data |
| 535 | }, |
| 536 | taskId |
| 537 | }) |
| 538 | return |
| 539 | } |
| 540 | const fn = this.taskFunctions.get(taskFunctionName)?.taskFunction |
| 541 | if (isAsyncFunction(fn)) { |
| 542 | this.runAsync(fn as TaskAsyncFunction<Data, Response>, task) |
| 543 | } else { |
| 544 | this.runSync(fn as TaskSyncFunction<Data, Response>, task) |
| 545 | } |
| 546 | } |
| 547 | |
| 548 | /** |
| 549 | * Runs the given task function synchronously. |
| 550 | * |
| 551 | * @param fn - Task function that will be executed. |
| 552 | * @param task - Input data for the task function. |
| 553 | */ |
| 554 | protected readonly runSync = ( |
| 555 | fn: TaskSyncFunction<Data, Response>, |
| 556 | task: Task<Data> |
| 557 | ): void => { |
| 558 | const { name, taskId, data } = task |
| 559 | try { |
| 560 | let taskPerformance = this.beginTaskPerformance(name) |
| 561 | const res = fn(data) |
| 562 | taskPerformance = this.endTaskPerformance(taskPerformance) |
| 563 | this.sendToMainWorker({ |
| 564 | data: res, |
| 565 | taskPerformance, |
| 566 | taskId |
| 567 | }) |
| 568 | } catch (error) { |
| 569 | this.sendToMainWorker({ |
| 570 | workerError: { |
| 571 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
| 572 | name: name!, |
| 573 | message: this.handleError(error as Error | string), |
| 574 | data |
| 575 | }, |
| 576 | taskId |
| 577 | }) |
| 578 | } finally { |
| 579 | this.updateLastTaskTimestamp() |
| 580 | } |
| 581 | } |
| 582 | |
| 583 | /** |
| 584 | * Runs the given task function asynchronously. |
| 585 | * |
| 586 | * @param fn - Task function that will be executed. |
| 587 | * @param task - Input data for the task function. |
| 588 | */ |
| 589 | protected readonly runAsync = ( |
| 590 | fn: TaskAsyncFunction<Data, Response>, |
| 591 | task: Task<Data> |
| 592 | ): void => { |
| 593 | const { name, taskId, data } = task |
| 594 | let taskPerformance = this.beginTaskPerformance(name) |
| 595 | fn(data) |
| 596 | .then(res => { |
| 597 | taskPerformance = this.endTaskPerformance(taskPerformance) |
| 598 | this.sendToMainWorker({ |
| 599 | data: res, |
| 600 | taskPerformance, |
| 601 | taskId |
| 602 | }) |
| 603 | return undefined |
| 604 | }) |
| 605 | .catch((error: unknown) => { |
| 606 | this.sendToMainWorker({ |
| 607 | workerError: { |
| 608 | // eslint-disable-next-line @typescript-eslint/no-non-null-assertion |
| 609 | name: name!, |
| 610 | message: this.handleError(error as Error | string), |
| 611 | data |
| 612 | }, |
| 613 | taskId |
| 614 | }) |
| 615 | }) |
| 616 | .finally(() => { |
| 617 | this.updateLastTaskTimestamp() |
| 618 | }) |
| 619 | .catch(EMPTY_FUNCTION) |
| 620 | } |
| 621 | |
| 622 | private beginTaskPerformance (name?: string): TaskPerformance { |
| 623 | if (this.statistics == null) { |
| 624 | throw new Error('Performance statistics computation requirements not set') |
| 625 | } |
| 626 | return { |
| 627 | name: name ?? DEFAULT_TASK_NAME, |
| 628 | timestamp: performance.now(), |
| 629 | ...(this.statistics.elu && { |
| 630 | elu: performance.eventLoopUtilization() |
| 631 | }) |
| 632 | } |
| 633 | } |
| 634 | |
| 635 | private endTaskPerformance ( |
| 636 | taskPerformance: TaskPerformance |
| 637 | ): TaskPerformance { |
| 638 | if (this.statistics == null) { |
| 639 | throw new Error('Performance statistics computation requirements not set') |
| 640 | } |
| 641 | return { |
| 642 | ...taskPerformance, |
| 643 | ...(this.statistics.runTime && { |
| 644 | runTime: performance.now() - taskPerformance.timestamp |
| 645 | }), |
| 646 | ...(this.statistics.elu && { |
| 647 | elu: performance.eventLoopUtilization(taskPerformance.elu) |
| 648 | }) |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | private updateLastTaskTimestamp (): void { |
| 653 | if (this.activeInterval != null) { |
| 654 | this.lastTaskTimestamp = performance.now() |
| 655 | } |
| 656 | } |
| 657 | } |