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85aeb3f3 | 1 | import { MessageChannel } from 'node:worker_threads' |
e1c2dba7 | 2 | import { EventEmitter } from 'node:events' |
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3 | import { CircularArray } from '../circular-array.js' |
4 | import type { Task } from '../utility-types.js' | |
5 | import { DEFAULT_TASK_NAME, getWorkerId, getWorkerType } from '../utils.js' | |
6 | import { Deque } from '../deque.js' | |
4b628b48 | 7 | import { |
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8 | type ErrorHandler, |
9 | type ExitHandler, | |
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10 | type IWorker, |
11 | type IWorkerNode, | |
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12 | type MessageHandler, |
13 | type OnlineHandler, | |
f3a91bac | 14 | type StrategyData, |
4b628b48 | 15 | type WorkerInfo, |
c3719753 | 16 | type WorkerNodeOptions, |
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17 | type WorkerType, |
18 | WorkerTypes, | |
19 | type WorkerUsage | |
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20 | } from './worker.js' |
21 | import { checkWorkerNodeArguments, createWorker } from './utils.js' | |
4b628b48 | 22 | |
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23 | /** |
24 | * Worker node. | |
25 | * | |
26 | * @typeParam Worker - Type of worker. | |
27 | * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data. | |
28 | */ | |
4b628b48 | 29 | export class WorkerNode<Worker extends IWorker, Data = unknown> |
e1c2dba7 | 30 | extends EventEmitter |
9f95d5eb | 31 | implements IWorkerNode<Worker, Data> { |
671d5154 | 32 | /** @inheritdoc */ |
4b628b48 | 33 | public readonly worker: Worker |
671d5154 | 34 | /** @inheritdoc */ |
4b628b48 | 35 | public readonly info: WorkerInfo |
671d5154 | 36 | /** @inheritdoc */ |
4b628b48 | 37 | public usage: WorkerUsage |
20c6f652 | 38 | /** @inheritdoc */ |
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39 | public strategyData?: StrategyData |
40 | /** @inheritdoc */ | |
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41 | public messageChannel?: MessageChannel |
42 | /** @inheritdoc */ | |
20c6f652 | 43 | public tasksQueueBackPressureSize: number |
574b351d | 44 | private readonly tasksQueue: Deque<Task<Data>> |
47352846 | 45 | private onBackPressureStarted: boolean |
26fb3c18 | 46 | private readonly taskFunctionsUsage: Map<string, WorkerUsage> |
4b628b48 | 47 | |
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48 | /** |
49 | * Constructs a new worker node. | |
50 | * | |
c3719753 | 51 | * @param type - The worker type. |
9974369e | 52 | * @param filePath - Path to the worker file. |
c3719753 | 53 | * @param opts - The worker node options. |
60664f48 | 54 | */ |
c3719753 | 55 | constructor (type: WorkerType, filePath: string, opts: WorkerNodeOptions) { |
9f95d5eb | 56 | super() |
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57 | checkWorkerNodeArguments(type, filePath, opts) |
58 | this.worker = createWorker<Worker>(type, filePath, { | |
59 | env: opts.env, | |
60 | workerOptions: opts.workerOptions | |
61 | }) | |
62 | this.info = this.initWorkerInfo(this.worker) | |
26fb3c18 | 63 | this.usage = this.initWorkerUsage() |
75de9f41 | 64 | if (this.info.type === WorkerTypes.thread) { |
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65 | this.messageChannel = new MessageChannel() |
66 | } | |
c3719753 | 67 | this.tasksQueueBackPressureSize = opts.tasksQueueBackPressureSize |
26fb3c18 | 68 | this.tasksQueue = new Deque<Task<Data>>() |
47352846 | 69 | this.onBackPressureStarted = false |
26fb3c18 | 70 | this.taskFunctionsUsage = new Map<string, WorkerUsage>() |
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71 | } |
72 | ||
73 | /** @inheritdoc */ | |
74 | public tasksQueueSize (): number { | |
75 | return this.tasksQueue.size | |
76 | } | |
77 | ||
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78 | /** @inheritdoc */ |
79 | public enqueueTask (task: Task<Data>): number { | |
72695f86 | 80 | const tasksQueueSize = this.tasksQueue.push(task) |
9f95d5eb | 81 | if (this.hasBackPressure() && !this.onBackPressureStarted) { |
47352846 | 82 | this.onBackPressureStarted = true |
e1c2dba7 | 83 | this.emit('backPressure', { workerId: this.info.id as number }) |
47352846 | 84 | this.onBackPressureStarted = false |
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85 | } |
86 | return tasksQueueSize | |
87 | } | |
88 | ||
89 | /** @inheritdoc */ | |
90 | public unshiftTask (task: Task<Data>): number { | |
91 | const tasksQueueSize = this.tasksQueue.unshift(task) | |
9f95d5eb | 92 | if (this.hasBackPressure() && !this.onBackPressureStarted) { |
47352846 | 93 | this.onBackPressureStarted = true |
e1c2dba7 | 94 | this.emit('backPressure', { workerId: this.info.id as number }) |
47352846 | 95 | this.onBackPressureStarted = false |
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96 | } |
97 | return tasksQueueSize | |
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98 | } |
99 | ||
100 | /** @inheritdoc */ | |
101 | public dequeueTask (): Task<Data> | undefined { | |
463226a4 | 102 | return this.tasksQueue.shift() |
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103 | } |
104 | ||
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105 | /** @inheritdoc */ |
106 | public popTask (): Task<Data> | undefined { | |
463226a4 | 107 | return this.tasksQueue.pop() |
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108 | } |
109 | ||
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110 | /** @inheritdoc */ |
111 | public clearTasksQueue (): void { | |
112 | this.tasksQueue.clear() | |
113 | } | |
114 | ||
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115 | /** @inheritdoc */ |
116 | public hasBackPressure (): boolean { | |
8735b4e5 | 117 | return this.tasksQueue.size >= this.tasksQueueBackPressureSize |
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118 | } |
119 | ||
ff128cc9 | 120 | /** @inheritdoc */ |
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121 | public resetUsage (): void { |
122 | this.usage = this.initWorkerUsage() | |
db0e38ee | 123 | this.taskFunctionsUsage.clear() |
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124 | } |
125 | ||
3f09ed9f | 126 | /** @inheritdoc */ |
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127 | public async terminate (): Promise<void> { |
128 | const waitWorkerExit = new Promise<void>(resolve => { | |
129 | this.registerOnceWorkerEventHandler('exit', () => { | |
130 | resolve() | |
131 | }) | |
132 | }) | |
133 | this.closeMessageChannel() | |
134 | this.removeAllListeners() | |
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135 | switch (this.info.type) { |
136 | case WorkerTypes.thread: | |
137 | await this.worker.terminate?.() | |
138 | break | |
139 | case WorkerTypes.cluster: | |
140 | this.registerOnceWorkerEventHandler('disconnect', () => { | |
141 | this.worker.kill?.() | |
142 | }) | |
143 | this.worker.disconnect?.() | |
144 | break | |
3f09ed9f | 145 | } |
07e0c9e5 | 146 | await waitWorkerExit |
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147 | } |
148 | ||
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149 | /** @inheritdoc */ |
150 | public registerWorkerEventHandler ( | |
151 | event: string, | |
88af9bf1 | 152 | handler: |
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153 | | OnlineHandler<Worker> |
154 | | MessageHandler<Worker> | |
155 | | ErrorHandler<Worker> | |
156 | | ExitHandler<Worker> | |
157 | ): void { | |
88af9bf1 | 158 | this.worker.on(event, handler) |
c3719753 JB |
159 | } |
160 | ||
161 | /** @inheritdoc */ | |
162 | public registerOnceWorkerEventHandler ( | |
163 | event: string, | |
88af9bf1 | 164 | handler: |
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165 | | OnlineHandler<Worker> |
166 | | MessageHandler<Worker> | |
167 | | ErrorHandler<Worker> | |
168 | | ExitHandler<Worker> | |
169 | ): void { | |
88af9bf1 | 170 | this.worker.once(event, handler) |
c3719753 JB |
171 | } |
172 | ||
ff128cc9 | 173 | /** @inheritdoc */ |
db0e38ee | 174 | public getTaskFunctionWorkerUsage (name: string): WorkerUsage | undefined { |
6703b9f4 | 175 | if (!Array.isArray(this.info.taskFunctionNames)) { |
71b2b6d8 | 176 | throw new Error( |
db0e38ee | 177 | `Cannot get task function worker usage for task function name '${name}' when task function names list is not yet defined` |
71b2b6d8 JB |
178 | ) |
179 | } | |
b558f6b5 | 180 | if ( |
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181 | Array.isArray(this.info.taskFunctionNames) && |
182 | this.info.taskFunctionNames.length < 3 | |
b558f6b5 | 183 | ) { |
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184 | throw new Error( |
185 | `Cannot get task function worker usage for task function name '${name}' when task function names list has less than 3 elements` | |
186 | ) | |
187 | } | |
188 | if (name === DEFAULT_TASK_NAME) { | |
6703b9f4 | 189 | name = this.info.taskFunctionNames[1] |
b558f6b5 | 190 | } |
db0e38ee JB |
191 | if (!this.taskFunctionsUsage.has(name)) { |
192 | this.taskFunctionsUsage.set(name, this.initTaskFunctionWorkerUsage(name)) | |
ff128cc9 | 193 | } |
db0e38ee | 194 | return this.taskFunctionsUsage.get(name) |
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195 | } |
196 | ||
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197 | /** @inheritdoc */ |
198 | public deleteTaskFunctionWorkerUsage (name: string): boolean { | |
199 | return this.taskFunctionsUsage.delete(name) | |
200 | } | |
201 | ||
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202 | private closeMessageChannel (): void { |
203 | if (this.messageChannel != null) { | |
204 | this.messageChannel.port1.unref() | |
205 | this.messageChannel.port2.unref() | |
206 | this.messageChannel.port1.close() | |
207 | this.messageChannel.port2.close() | |
208 | delete this.messageChannel | |
209 | } | |
210 | } | |
211 | ||
75de9f41 | 212 | private initWorkerInfo (worker: Worker): WorkerInfo { |
4b628b48 | 213 | return { |
75de9f41 JB |
214 | id: getWorkerId(worker), |
215 | type: getWorkerType(worker) as WorkerType, | |
4b628b48 | 216 | dynamic: false, |
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217 | ready: false, |
218 | stealing: false | |
4b628b48 JB |
219 | } |
220 | } | |
221 | ||
222 | private initWorkerUsage (): WorkerUsage { | |
223 | const getTasksQueueSize = (): number => { | |
dd951876 | 224 | return this.tasksQueue.size |
4b628b48 | 225 | } |
bf4ef2ca | 226 | const getTasksQueueMaxSize = (): number => { |
dd951876 | 227 | return this.tasksQueue.maxSize |
4b628b48 JB |
228 | } |
229 | return { | |
230 | tasks: { | |
231 | executed: 0, | |
232 | executing: 0, | |
233 | get queued (): number { | |
234 | return getTasksQueueSize() | |
235 | }, | |
236 | get maxQueued (): number { | |
bf4ef2ca | 237 | return getTasksQueueMaxSize() |
4b628b48 | 238 | }, |
463226a4 | 239 | sequentiallyStolen: 0, |
68cbdc84 | 240 | stolen: 0, |
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241 | failed: 0 |
242 | }, | |
243 | runTime: { | |
c52475b8 | 244 | history: new CircularArray<number>() |
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245 | }, |
246 | waitTime: { | |
c52475b8 | 247 | history: new CircularArray<number>() |
4b628b48 JB |
248 | }, |
249 | elu: { | |
250 | idle: { | |
c52475b8 | 251 | history: new CircularArray<number>() |
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252 | }, |
253 | active: { | |
c52475b8 | 254 | history: new CircularArray<number>() |
4b628b48 JB |
255 | } |
256 | } | |
257 | } | |
258 | } | |
259 | ||
db0e38ee | 260 | private initTaskFunctionWorkerUsage (name: string): WorkerUsage { |
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261 | const getTaskFunctionQueueSize = (): number => { |
262 | let taskFunctionQueueSize = 0 | |
b25a42cd | 263 | for (const task of this.tasksQueue) { |
dd92a715 | 264 | if ( |
e5ece61d | 265 | (task.name === DEFAULT_TASK_NAME && |
6703b9f4 | 266 | name === (this.info.taskFunctionNames as string[])[1]) || |
e5ece61d | 267 | (task.name !== DEFAULT_TASK_NAME && name === task.name) |
dd92a715 | 268 | ) { |
e5ece61d | 269 | ++taskFunctionQueueSize |
b25a42cd JB |
270 | } |
271 | } | |
e5ece61d | 272 | return taskFunctionQueueSize |
b25a42cd JB |
273 | } |
274 | return { | |
275 | tasks: { | |
276 | executed: 0, | |
277 | executing: 0, | |
278 | get queued (): number { | |
e5ece61d | 279 | return getTaskFunctionQueueSize() |
b25a42cd | 280 | }, |
463226a4 | 281 | sequentiallyStolen: 0, |
68cbdc84 | 282 | stolen: 0, |
b25a42cd JB |
283 | failed: 0 |
284 | }, | |
285 | runTime: { | |
c52475b8 | 286 | history: new CircularArray<number>() |
b25a42cd JB |
287 | }, |
288 | waitTime: { | |
c52475b8 | 289 | history: new CircularArray<number>() |
b25a42cd JB |
290 | }, |
291 | elu: { | |
292 | idle: { | |
c52475b8 | 293 | history: new CircularArray<number>() |
b25a42cd JB |
294 | }, |
295 | active: { | |
c52475b8 | 296 | history: new CircularArray<number>() |
b25a42cd JB |
297 | } |
298 | } | |
299 | } | |
300 | } | |
4b628b48 | 301 | } |