Commit | Line | Data |
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26ce26ca | 1 | import { getDefaultInternalWorkerChoiceStrategyOptions } from '../../utils' |
c4855468 | 2 | import type { IPool } from '../pool' |
f06e48d8 | 3 | import type { IWorker } from '../worker' |
51fe3d3c | 4 | import { FairShareWorkerChoiceStrategy } from './fair-share-worker-choice-strategy' |
feec6e8c | 5 | import { InterleavedWeightedRoundRobinWorkerChoiceStrategy } from './interleaved-weighted-round-robin-worker-choice-strategy' |
e4543b14 JB |
6 | import { LeastBusyWorkerChoiceStrategy } from './least-busy-worker-choice-strategy' |
7 | import { LeastUsedWorkerChoiceStrategy } from './least-used-worker-choice-strategy' | |
058a9457 | 8 | import { LeastEluWorkerChoiceStrategy } from './least-elu-worker-choice-strategy' |
51fe3d3c | 9 | import { RoundRobinWorkerChoiceStrategy } from './round-robin-worker-choice-strategy' |
bdaf31cd JB |
10 | import type { |
11 | IWorkerChoiceStrategy, | |
26ce26ca | 12 | InternalWorkerChoiceStrategyOptions, |
6c6afb84 | 13 | StrategyPolicy, |
87de9ff5 | 14 | TaskStatisticsRequirements, |
26ce26ca | 15 | WorkerChoiceStrategy |
bdaf31cd JB |
16 | } from './selection-strategies-types' |
17 | import { WorkerChoiceStrategies } from './selection-strategies-types' | |
51fe3d3c | 18 | import { WeightedRoundRobinWorkerChoiceStrategy } from './weighted-round-robin-worker-choice-strategy' |
bdaf31cd JB |
19 | |
20 | /** | |
21 | * The worker choice strategy context. | |
22 | * | |
38e795c1 | 23 | * @typeParam Worker - Type of worker. |
e102732c JB |
24 | * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data. |
25 | * @typeParam Response - Type of execution response. This can only be structured-cloneable data. | |
bdaf31cd JB |
26 | */ |
27 | export class WorkerChoiceStrategyContext< | |
f06e48d8 | 28 | Worker extends IWorker, |
b2b1d84e JB |
29 | Data = unknown, |
30 | Response = unknown | |
bdaf31cd | 31 | > { |
b529c323 | 32 | private readonly workerChoiceStrategies: Map< |
95c83464 | 33 | WorkerChoiceStrategy, |
17393ac8 | 34 | IWorkerChoiceStrategy |
b529c323 | 35 | > |
bdaf31cd JB |
36 | |
37 | /** | |
38 | * Worker choice strategy context constructor. | |
39 | * | |
38e795c1 | 40 | * @param pool - The pool instance. |
d710242d | 41 | * @param workerChoiceStrategy - The worker choice strategy. |
da309861 | 42 | * @param opts - The worker choice strategy options. |
bdaf31cd JB |
43 | */ |
44 | public constructor ( | |
c4855468 | 45 | pool: IPool<Worker, Data, Response>, |
d710242d | 46 | private workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN, |
26ce26ca | 47 | private opts?: InternalWorkerChoiceStrategyOptions |
bdaf31cd | 48 | ) { |
26ce26ca | 49 | this.opts = { |
449cd154 JB |
50 | ...getDefaultInternalWorkerChoiceStrategyOptions( |
51 | pool.info.maxSize + | |
52 | Object.keys((this.opts?.weights as Record<number, number>) ?? {}) | |
53 | .length | |
54 | ), | |
26ce26ca JB |
55 | ...this.opts |
56 | } | |
7254e419 | 57 | this.execute = this.execute.bind(this) |
b529c323 JB |
58 | this.workerChoiceStrategies = new Map< |
59 | WorkerChoiceStrategy, | |
17393ac8 | 60 | IWorkerChoiceStrategy |
b529c323 JB |
61 | >([ |
62 | [ | |
63 | WorkerChoiceStrategies.ROUND_ROBIN, | |
7254e419 JB |
64 | new (RoundRobinWorkerChoiceStrategy.bind(this))<Worker, Data, Response>( |
65 | pool, | |
26ce26ca | 66 | this.opts |
7254e419 | 67 | ) |
b529c323 JB |
68 | ], |
69 | [ | |
e4543b14 JB |
70 | WorkerChoiceStrategies.LEAST_USED, |
71 | new (LeastUsedWorkerChoiceStrategy.bind(this))<Worker, Data, Response>( | |
7254e419 | 72 | pool, |
26ce26ca | 73 | this.opts |
7254e419 | 74 | ) |
b529c323 JB |
75 | ], |
76 | [ | |
e4543b14 JB |
77 | WorkerChoiceStrategies.LEAST_BUSY, |
78 | new (LeastBusyWorkerChoiceStrategy.bind(this))<Worker, Data, Response>( | |
7254e419 | 79 | pool, |
26ce26ca | 80 | this.opts |
7254e419 | 81 | ) |
b529c323 JB |
82 | ], |
83 | [ | |
058a9457 JB |
84 | WorkerChoiceStrategies.LEAST_ELU, |
85 | new (LeastEluWorkerChoiceStrategy.bind(this))<Worker, Data, Response>( | |
86 | pool, | |
26ce26ca | 87 | this.opts |
058a9457 JB |
88 | ) |
89 | ], | |
90 | [ | |
b529c323 | 91 | WorkerChoiceStrategies.FAIR_SHARE, |
7254e419 | 92 | new (FairShareWorkerChoiceStrategy.bind(this))<Worker, Data, Response>( |
da309861 | 93 | pool, |
26ce26ca | 94 | this.opts |
da309861 | 95 | ) |
7254e419 JB |
96 | ], |
97 | [ | |
98 | WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN, | |
99 | new (WeightedRoundRobinWorkerChoiceStrategy.bind(this))< | |
100 | Worker, | |
101 | Data, | |
102 | Response | |
26ce26ca | 103 | >(pool, this.opts) |
feec6e8c JB |
104 | ], |
105 | [ | |
106 | WorkerChoiceStrategies.INTERLEAVED_WEIGHTED_ROUND_ROBIN, | |
107 | new (InterleavedWeightedRoundRobinWorkerChoiceStrategy.bind(this))< | |
108 | Worker, | |
109 | Data, | |
110 | Response | |
26ce26ca | 111 | >(pool, this.opts) |
b529c323 JB |
112 | ] |
113 | ]) | |
bdaf31cd JB |
114 | } |
115 | ||
6c6afb84 JB |
116 | /** |
117 | * Gets the strategy policy in the context. | |
118 | * | |
119 | * @returns The strategy policy. | |
120 | */ | |
121 | public getStrategyPolicy (): StrategyPolicy { | |
122 | return ( | |
123 | this.workerChoiceStrategies.get( | |
124 | this.workerChoiceStrategy | |
125 | ) as IWorkerChoiceStrategy | |
126 | ).strategyPolicy | |
127 | } | |
128 | ||
97a2abc3 | 129 | /** |
8990357d | 130 | * Gets the worker choice strategy in the context task statistics requirements. |
97a2abc3 | 131 | * |
87de9ff5 | 132 | * @returns The task statistics requirements. |
97a2abc3 | 133 | */ |
87de9ff5 | 134 | public getTaskStatisticsRequirements (): TaskStatisticsRequirements { |
95c83464 JB |
135 | return ( |
136 | this.workerChoiceStrategies.get( | |
d710242d | 137 | this.workerChoiceStrategy |
17393ac8 | 138 | ) as IWorkerChoiceStrategy |
87de9ff5 | 139 | ).taskStatisticsRequirements |
97a2abc3 JB |
140 | } |
141 | ||
bdaf31cd | 142 | /** |
bdede008 | 143 | * Sets the worker choice strategy to use in the context. |
bdaf31cd | 144 | * |
38e795c1 | 145 | * @param workerChoiceStrategy - The worker choice strategy to set. |
bdaf31cd JB |
146 | */ |
147 | public setWorkerChoiceStrategy ( | |
148 | workerChoiceStrategy: WorkerChoiceStrategy | |
149 | ): void { | |
d710242d JB |
150 | if (this.workerChoiceStrategy !== workerChoiceStrategy) { |
151 | this.workerChoiceStrategy = workerChoiceStrategy | |
b2b1d84e | 152 | } |
d710242d | 153 | this.workerChoiceStrategies.get(this.workerChoiceStrategy)?.reset() |
bdaf31cd JB |
154 | } |
155 | ||
138d29a8 | 156 | /** |
8990357d | 157 | * Updates the worker node key in the worker choice strategy in the context internals. |
138d29a8 JB |
158 | * |
159 | * @returns `true` if the update is successful, `false` otherwise. | |
160 | */ | |
a4958de2 | 161 | public update (workerNodeKey: number): boolean { |
138d29a8 JB |
162 | return ( |
163 | this.workerChoiceStrategies.get( | |
164 | this.workerChoiceStrategy | |
165 | ) as IWorkerChoiceStrategy | |
a4958de2 | 166 | ).update(workerNodeKey) |
138d29a8 JB |
167 | } |
168 | ||
bdaf31cd | 169 | /** |
8990357d | 170 | * Executes the worker choice strategy in the context algorithm. |
bdaf31cd | 171 | * |
f06e48d8 | 172 | * @returns The key of the worker node. |
fb5a7307 | 173 | * @throws {@link https://nodejs.org/api/errors.html#class-error} If after configured retries the worker node key is null or undefined. |
bdaf31cd | 174 | */ |
c923ce56 | 175 | public execute (): number { |
fb5a7307 JB |
176 | const workerChoiceStrategy = this.workerChoiceStrategies.get( |
177 | this.workerChoiceStrategy | |
178 | ) as IWorkerChoiceStrategy | |
613a91dc | 179 | if (!workerChoiceStrategy.hasPoolWorkerNodesReady()) { |
722d55a0 | 180 | return this.execute() |
613a91dc JB |
181 | } |
182 | return this.executeStrategy(workerChoiceStrategy) | |
183 | } | |
184 | ||
185 | /** | |
186 | * Executes the given worker choice strategy. | |
187 | * | |
188 | * @param workerChoiceStrategy - The worker choice strategy. | |
189 | * @returns The key of the worker node. | |
190 | * @throws {@link https://nodejs.org/api/errors.html#class-error} If after configured retries the worker node key is null or undefined. | |
191 | */ | |
192 | private executeStrategy (workerChoiceStrategy: IWorkerChoiceStrategy): number { | |
fb5a7307 | 193 | let workerNodeKey: number | undefined |
fb5a7307 JB |
194 | let chooseCount = 0 |
195 | let retriesCount = 0 | |
196 | do { | |
613a91dc JB |
197 | workerNodeKey = workerChoiceStrategy.choose() |
198 | if (workerNodeKey == null && chooseCount > 0) { | |
199 | retriesCount++ | |
fb5a7307 | 200 | } |
613a91dc | 201 | chooseCount++ |
fb5a7307 | 202 | } while ( |
613a91dc | 203 | workerNodeKey == null && |
26ce26ca | 204 | retriesCount < (this.opts?.retries as number) |
fb5a7307 | 205 | ) |
fb5a7307 | 206 | if (workerNodeKey == null) { |
e695d66f | 207 | throw new Error( |
fb5a7307 | 208 | `Worker node key chosen is null or undefined after ${retriesCount} retries` |
4ba8492f | 209 | ) |
b0d6ed8f JB |
210 | } |
211 | return workerNodeKey | |
bdaf31cd | 212 | } |
97a2abc3 JB |
213 | |
214 | /** | |
c7e196ba | 215 | * Removes the worker node key from the worker choice strategy in the context. |
97a2abc3 | 216 | * |
501aea93 | 217 | * @param workerNodeKey - The worker node key. |
97a2abc3 JB |
218 | * @returns `true` if the removal is successful, `false` otherwise. |
219 | */ | |
f06e48d8 | 220 | public remove (workerNodeKey: number): boolean { |
95c83464 JB |
221 | return ( |
222 | this.workerChoiceStrategies.get( | |
d710242d | 223 | this.workerChoiceStrategy |
17393ac8 | 224 | ) as IWorkerChoiceStrategy |
f06e48d8 | 225 | ).remove(workerNodeKey) |
95c83464 | 226 | } |
a20f0ba5 JB |
227 | |
228 | /** | |
229 | * Sets the worker choice strategies in the context options. | |
230 | * | |
af7f2788 | 231 | * @param pool - The pool instance. |
a20f0ba5 JB |
232 | * @param opts - The worker choice strategy options. |
233 | */ | |
26ce26ca JB |
234 | public setOptions ( |
235 | pool: IPool<Worker, Data, Response>, | |
236 | opts?: InternalWorkerChoiceStrategyOptions | |
237 | ): void { | |
238 | this.opts = { | |
449cd154 JB |
239 | ...getDefaultInternalWorkerChoiceStrategyOptions( |
240 | pool.info.maxSize + | |
241 | Object.keys((opts?.weights as Record<number, number>) ?? {}).length | |
242 | ), | |
26ce26ca JB |
243 | ...opts |
244 | } | |
0509fd43 | 245 | for (const workerChoiceStrategy of this.workerChoiceStrategies.values()) { |
26ce26ca | 246 | workerChoiceStrategy.setOptions(this.opts) |
0509fd43 | 247 | } |
a20f0ba5 | 248 | } |
bdaf31cd | 249 | } |