| 1 | import { MessageChannel } from 'node:worker_threads' |
| 2 | import { CircularArray } from '../circular-array' |
| 3 | import { Queue } from '../queue' |
| 4 | import type { Task } from '../utility-types' |
| 5 | import { DEFAULT_TASK_NAME } from '../utils' |
| 6 | import { |
| 7 | type IWorker, |
| 8 | type IWorkerNode, |
| 9 | type WorkerInfo, |
| 10 | type WorkerType, |
| 11 | WorkerTypes, |
| 12 | type WorkerUsage |
| 13 | } from './worker' |
| 14 | |
| 15 | /** |
| 16 | * Worker node. |
| 17 | * |
| 18 | * @typeParam Worker - Type of worker. |
| 19 | * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data. |
| 20 | */ |
| 21 | export class WorkerNode<Worker extends IWorker, Data = unknown> |
| 22 | implements IWorkerNode<Worker, Data> { |
| 23 | /** @inheritdoc */ |
| 24 | public readonly worker: Worker |
| 25 | /** @inheritdoc */ |
| 26 | public readonly info: WorkerInfo |
| 27 | /** @inheritdoc */ |
| 28 | public messageChannel?: MessageChannel |
| 29 | /** @inheritdoc */ |
| 30 | public usage: WorkerUsage |
| 31 | /** @inheritdoc */ |
| 32 | public tasksQueueBackPressureSize: number |
| 33 | private readonly taskFunctionsUsage: Map<string, WorkerUsage> |
| 34 | private readonly tasksQueue: Queue<Task<Data>> |
| 35 | |
| 36 | /** |
| 37 | * Constructs a new worker node. |
| 38 | * |
| 39 | * @param worker - The worker. |
| 40 | * @param workerType - The worker type. |
| 41 | * @param tasksQueueBackPressureSize - The tasks queue back pressure size. |
| 42 | */ |
| 43 | constructor ( |
| 44 | worker: Worker, |
| 45 | workerType: WorkerType, |
| 46 | tasksQueueBackPressureSize: number |
| 47 | ) { |
| 48 | if (worker == null) { |
| 49 | throw new TypeError('Cannot construct a worker node without a worker') |
| 50 | } |
| 51 | if (workerType == null) { |
| 52 | throw new TypeError( |
| 53 | 'Cannot construct a worker node without a worker type' |
| 54 | ) |
| 55 | } |
| 56 | if (tasksQueueBackPressureSize == null) { |
| 57 | throw new TypeError( |
| 58 | 'Cannot construct a worker node without a tasks queue back pressure size' |
| 59 | ) |
| 60 | } |
| 61 | if (!Number.isSafeInteger(tasksQueueBackPressureSize)) { |
| 62 | throw new TypeError( |
| 63 | 'Cannot construct a worker node with a tasks queue back pressure size that is not an integer' |
| 64 | ) |
| 65 | } |
| 66 | this.worker = worker |
| 67 | this.info = this.initWorkerInfo(worker, workerType) |
| 68 | if (workerType === WorkerTypes.thread) { |
| 69 | this.messageChannel = new MessageChannel() |
| 70 | } |
| 71 | this.usage = this.initWorkerUsage() |
| 72 | this.taskFunctionsUsage = new Map<string, WorkerUsage>() |
| 73 | this.tasksQueue = new Queue<Task<Data>>() |
| 74 | this.tasksQueueBackPressureSize = tasksQueueBackPressureSize |
| 75 | } |
| 76 | |
| 77 | /** @inheritdoc */ |
| 78 | public tasksQueueSize (): number { |
| 79 | return this.tasksQueue.size |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Tasks queue maximum size. |
| 84 | * |
| 85 | * @returns The tasks queue maximum size. |
| 86 | */ |
| 87 | private tasksQueueMaxSize (): number { |
| 88 | return this.tasksQueue.maxSize |
| 89 | } |
| 90 | |
| 91 | /** @inheritdoc */ |
| 92 | public enqueueTask (task: Task<Data>): number { |
| 93 | return this.tasksQueue.enqueue(task) |
| 94 | } |
| 95 | |
| 96 | /** @inheritdoc */ |
| 97 | public dequeueTask (): Task<Data> | undefined { |
| 98 | return this.tasksQueue.dequeue() |
| 99 | } |
| 100 | |
| 101 | /** @inheritdoc */ |
| 102 | public clearTasksQueue (): void { |
| 103 | this.tasksQueue.clear() |
| 104 | } |
| 105 | |
| 106 | /** @inheritdoc */ |
| 107 | public hasBackPressure (): boolean { |
| 108 | return this.tasksQueue.size >= this.tasksQueueBackPressureSize |
| 109 | } |
| 110 | |
| 111 | /** @inheritdoc */ |
| 112 | public resetUsage (): void { |
| 113 | this.usage = this.initWorkerUsage() |
| 114 | this.taskFunctionsUsage.clear() |
| 115 | } |
| 116 | |
| 117 | /** @inheritdoc */ |
| 118 | public closeChannel (): void { |
| 119 | if (this.messageChannel != null) { |
| 120 | this.messageChannel?.port1.unref() |
| 121 | this.messageChannel?.port2.unref() |
| 122 | this.messageChannel?.port1.close() |
| 123 | this.messageChannel?.port2.close() |
| 124 | delete this.messageChannel |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | /** @inheritdoc */ |
| 129 | public getTaskFunctionWorkerUsage (name: string): WorkerUsage | undefined { |
| 130 | if (!Array.isArray(this.info.taskFunctions)) { |
| 131 | throw new Error( |
| 132 | `Cannot get task function worker usage for task function name '${name}' when task function names list is not yet defined` |
| 133 | ) |
| 134 | } |
| 135 | if ( |
| 136 | Array.isArray(this.info.taskFunctions) && |
| 137 | this.info.taskFunctions.length < 3 |
| 138 | ) { |
| 139 | throw new Error( |
| 140 | `Cannot get task function worker usage for task function name '${name}' when task function names list has less than 3 elements` |
| 141 | ) |
| 142 | } |
| 143 | if (name === DEFAULT_TASK_NAME) { |
| 144 | name = this.info.taskFunctions[1] |
| 145 | } |
| 146 | if (!this.taskFunctionsUsage.has(name)) { |
| 147 | this.taskFunctionsUsage.set(name, this.initTaskFunctionWorkerUsage(name)) |
| 148 | } |
| 149 | return this.taskFunctionsUsage.get(name) |
| 150 | } |
| 151 | |
| 152 | private initWorkerInfo (worker: Worker, workerType: WorkerType): WorkerInfo { |
| 153 | return { |
| 154 | id: this.getWorkerId(worker, workerType), |
| 155 | type: workerType, |
| 156 | dynamic: false, |
| 157 | ready: false |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | private initWorkerUsage (): WorkerUsage { |
| 162 | const getTasksQueueSize = (): number => { |
| 163 | return this.tasksQueueSize() |
| 164 | } |
| 165 | const getTasksQueueMaxSize = (): number => { |
| 166 | return this.tasksQueueMaxSize() |
| 167 | } |
| 168 | return { |
| 169 | tasks: { |
| 170 | executed: 0, |
| 171 | executing: 0, |
| 172 | get queued (): number { |
| 173 | return getTasksQueueSize() |
| 174 | }, |
| 175 | get maxQueued (): number { |
| 176 | return getTasksQueueMaxSize() |
| 177 | }, |
| 178 | failed: 0 |
| 179 | }, |
| 180 | runTime: { |
| 181 | history: new CircularArray() |
| 182 | }, |
| 183 | waitTime: { |
| 184 | history: new CircularArray() |
| 185 | }, |
| 186 | elu: { |
| 187 | idle: { |
| 188 | history: new CircularArray() |
| 189 | }, |
| 190 | active: { |
| 191 | history: new CircularArray() |
| 192 | } |
| 193 | } |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | private initTaskFunctionWorkerUsage (name: string): WorkerUsage { |
| 198 | const getTaskFunctionQueueSize = (): number => { |
| 199 | let taskFunctionQueueSize = 0 |
| 200 | for (const task of this.tasksQueue) { |
| 201 | if ( |
| 202 | (task.name === DEFAULT_TASK_NAME && |
| 203 | name === (this.info.taskFunctions as string[])[1]) || |
| 204 | (task.name !== DEFAULT_TASK_NAME && name === task.name) |
| 205 | ) { |
| 206 | ++taskFunctionQueueSize |
| 207 | } |
| 208 | } |
| 209 | return taskFunctionQueueSize |
| 210 | } |
| 211 | return { |
| 212 | tasks: { |
| 213 | executed: 0, |
| 214 | executing: 0, |
| 215 | get queued (): number { |
| 216 | return getTaskFunctionQueueSize() |
| 217 | }, |
| 218 | failed: 0 |
| 219 | }, |
| 220 | runTime: { |
| 221 | history: new CircularArray() |
| 222 | }, |
| 223 | waitTime: { |
| 224 | history: new CircularArray() |
| 225 | }, |
| 226 | elu: { |
| 227 | idle: { |
| 228 | history: new CircularArray() |
| 229 | }, |
| 230 | active: { |
| 231 | history: new CircularArray() |
| 232 | } |
| 233 | } |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | /** |
| 238 | * Gets the worker id. |
| 239 | * |
| 240 | * @param worker - The worker. |
| 241 | * @param workerType - The worker type. |
| 242 | * @returns The worker id. |
| 243 | */ |
| 244 | private getWorkerId ( |
| 245 | worker: Worker, |
| 246 | workerType: WorkerType |
| 247 | ): number | undefined { |
| 248 | if (workerType === WorkerTypes.thread) { |
| 249 | return worker.threadId |
| 250 | } else if (workerType === WorkerTypes.cluster) { |
| 251 | return worker.id |
| 252 | } |
| 253 | } |
| 254 | } |