X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fpools%2Fselection-strategies%2Fworker-choice-strategy-context.ts;h=f9ddb3a1c54dd5798c94a30fb3ae58437932fe42;hb=e334515bf28581c234d6b9f5239425c9a0c6a7ec;hp=8041e2f6577b7ca046c6e51048ed2a7d873923db;hpb=ccd49f039d24ec1590b2b32ff1738c80fae743e5;p=poolifier.git diff --git a/src/pools/selection-strategies/worker-choice-strategy-context.ts b/src/pools/selection-strategies/worker-choice-strategy-context.ts index 8041e2f6..f9ddb3a1 100644 --- a/src/pools/selection-strategies/worker-choice-strategy-context.ts +++ b/src/pools/selection-strategies/worker-choice-strategy-context.ts @@ -1,50 +1,145 @@ -import type { IPoolInternal } from '../pool-internal' -import type { IPoolWorker } from '../pool-worker' +import type { IPool } from '../pool.js' +import { getWorkerChoiceStrategyRetries } from '../utils.js' +import type { IWorker } from '../worker.js' +import { FairShareWorkerChoiceStrategy } from './fair-share-worker-choice-strategy.js' +import { InterleavedWeightedRoundRobinWorkerChoiceStrategy } from './interleaved-weighted-round-robin-worker-choice-strategy.js' +import { LeastBusyWorkerChoiceStrategy } from './least-busy-worker-choice-strategy.js' +import { LeastEluWorkerChoiceStrategy } from './least-elu-worker-choice-strategy.js' +import { LeastUsedWorkerChoiceStrategy } from './least-used-worker-choice-strategy.js' +import { RoundRobinWorkerChoiceStrategy } from './round-robin-worker-choice-strategy.js' import type { IWorkerChoiceStrategy, - RequiredStatistics, - WorkerChoiceStrategy -} from './selection-strategies-types' -import { WorkerChoiceStrategies } from './selection-strategies-types' -import { getWorkerChoiceStrategy } from './selection-strategies-utils' + StrategyPolicy, + TaskStatisticsRequirements, + WorkerChoiceStrategy, + WorkerChoiceStrategyOptions +} from './selection-strategies-types.js' +import { WorkerChoiceStrategies } from './selection-strategies-types.js' +import { WeightedRoundRobinWorkerChoiceStrategy } from './weighted-round-robin-worker-choice-strategy.js' /** * The worker choice strategy context. * * @typeParam Worker - Type of worker. - * @typeParam Data - Type of data sent to the worker. This can only be serializable data. - * @typeParam Response - Type of response of execution. This can only be serializable data. + * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data. + * @typeParam Response - Type of execution response. This can only be structured-cloneable data. */ export class WorkerChoiceStrategyContext< - Worker extends IPoolWorker, - Data, - Response + Worker extends IWorker, + Data = unknown, + Response = unknown > { - private workerChoiceStrategy!: IWorkerChoiceStrategy + /** + * The number of worker choice strategy execution retries. + */ + public retriesCount: number + + /** + * The worker choice strategy instances registered in the context. + */ + private readonly workerChoiceStrategies: Map< + WorkerChoiceStrategy, + IWorkerChoiceStrategy + > + + /** + * The maximum number of worker choice strategy execution retries. + */ + private readonly retries: number /** * Worker choice strategy context constructor. * * @param pool - The pool instance. - * @param createWorkerCallback - The worker creation callback for dynamic pool. * @param workerChoiceStrategy - The worker choice strategy. + * @param opts - The worker choice strategy options. */ public constructor ( - private readonly pool: IPoolInternal, - private readonly createWorkerCallback: () => number, - workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN + pool: IPool, + private workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN, + opts?: WorkerChoiceStrategyOptions ) { - this.execute.bind(this) - this.setWorkerChoiceStrategy(workerChoiceStrategy) + this.execute = this.execute.bind(this) + this.workerChoiceStrategies = new Map< + WorkerChoiceStrategy, + IWorkerChoiceStrategy + >([ + [ + WorkerChoiceStrategies.ROUND_ROBIN, + new (RoundRobinWorkerChoiceStrategy.bind(this))( + pool, + opts + ) + ], + [ + WorkerChoiceStrategies.LEAST_USED, + new (LeastUsedWorkerChoiceStrategy.bind(this))( + pool, + opts + ) + ], + [ + WorkerChoiceStrategies.LEAST_BUSY, + new (LeastBusyWorkerChoiceStrategy.bind(this))( + pool, + opts + ) + ], + [ + WorkerChoiceStrategies.LEAST_ELU, + new (LeastEluWorkerChoiceStrategy.bind(this))( + pool, + opts + ) + ], + [ + WorkerChoiceStrategies.FAIR_SHARE, + new (FairShareWorkerChoiceStrategy.bind(this))( + pool, + opts + ) + ], + [ + WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN, + new (WeightedRoundRobinWorkerChoiceStrategy.bind(this))< + Worker, + Data, + Response + >(pool, opts) + ], + [ + WorkerChoiceStrategies.INTERLEAVED_WEIGHTED_ROUND_ROBIN, + new (InterleavedWeightedRoundRobinWorkerChoiceStrategy.bind(this))< + Worker, + Data, + Response + >(pool, opts) + ] + ]) + this.retriesCount = 0 + this.retries = getWorkerChoiceStrategyRetries(pool, opts) } /** - * Gets the worker choice strategy required statistics. + * Gets the strategy policy in the context. * - * @returns The required statistics. + * @returns The strategy policy. */ - public getRequiredStatistics (): RequiredStatistics { - return this.workerChoiceStrategy.requiredStatistics + public getStrategyPolicy (): StrategyPolicy { + // eslint-disable-next-line @typescript-eslint/no-non-null-assertion + return this.workerChoiceStrategies.get(this.workerChoiceStrategy)! + .strategyPolicy + } + + /** + * Gets the worker choice strategy in the context task statistics requirements. + * + * @returns The task statistics requirements. + */ + public getTaskStatisticsRequirements (): TaskStatisticsRequirements { + // eslint-disable-next-line @typescript-eslint/no-non-null-assertion + return this.workerChoiceStrategies.get(this.workerChoiceStrategy)! + .taskStatisticsRequirements } /** @@ -55,36 +150,85 @@ export class WorkerChoiceStrategyContext< public setWorkerChoiceStrategy ( workerChoiceStrategy: WorkerChoiceStrategy ): void { - this.workerChoiceStrategy?.reset() - this.workerChoiceStrategy = getWorkerChoiceStrategy( - this.pool, - workerChoiceStrategy - ) + if (this.workerChoiceStrategy !== workerChoiceStrategy) { + this.workerChoiceStrategy = workerChoiceStrategy + } + this.workerChoiceStrategies.get(this.workerChoiceStrategy)?.reset() } /** - * Chooses a worker with the worker choice strategy. + * Updates the worker node key in the worker choice strategy in the context internals. * - * @returns The key of the chosen one. + * @returns `true` if the update is successful, `false` otherwise. + */ + public update (workerNodeKey: number): boolean { + // eslint-disable-next-line @typescript-eslint/no-non-null-assertion + return this.workerChoiceStrategies + .get(this.workerChoiceStrategy)! + .update(workerNodeKey) + } + + /** + * Executes the worker choice strategy in the context algorithm. + * + * @returns The key of the worker node. + * @throws {@link https://nodejs.org/api/errors.html#class-error} If after computed retries the worker node key is null or undefined. */ public execute (): number { - if ( - this.workerChoiceStrategy.isDynamicPool && - !this.pool.full && - this.pool.findFreeWorkerKey() === -1 - ) { - return this.createWorkerCallback() + return this.executeStrategy( + // eslint-disable-next-line @typescript-eslint/no-non-null-assertion + this.workerChoiceStrategies.get(this.workerChoiceStrategy)! + ) + } + + /** + * Executes the given worker choice strategy. + * + * @param workerChoiceStrategy - The worker choice strategy. + * @returns The key of the worker node. + * @throws {@link https://nodejs.org/api/errors.html#class-error} If after computed retries the worker node key is null or undefined. + */ + private executeStrategy (workerChoiceStrategy: IWorkerChoiceStrategy): number { + let workerNodeKey: number | undefined + let chooseCount = 0 + let retriesCount = 0 + do { + workerNodeKey = workerChoiceStrategy.choose() + if (workerNodeKey == null && chooseCount > 0) { + ++retriesCount + ++this.retriesCount + } + ++chooseCount + } while (workerNodeKey == null && retriesCount < this.retries) + if (workerNodeKey == null) { + throw new Error( + `Worker node key chosen is null or undefined after ${retriesCount} retries` + ) } - return this.workerChoiceStrategy.choose() + return workerNodeKey } /** - * Removes a worker in the worker choice strategy internals. + * Removes the worker node key from the worker choice strategy in the context. * - * @param workerKey - The key of the worker to remove. + * @param workerNodeKey - The worker node key. * @returns `true` if the removal is successful, `false` otherwise. */ - public remove (workerKey: number): boolean { - return this.workerChoiceStrategy.remove(workerKey) + public remove (workerNodeKey: number): boolean { + // eslint-disable-next-line @typescript-eslint/no-non-null-assertion + return this.workerChoiceStrategies + .get(this.workerChoiceStrategy)! + .remove(workerNodeKey) + } + + /** + * Sets the worker choice strategies in the context options. + * + * @param opts - The worker choice strategy options. + */ + public setOptions (opts: WorkerChoiceStrategyOptions | undefined): void { + for (const workerChoiceStrategy of this.workerChoiceStrategies.values()) { + workerChoiceStrategy.setOptions(opts) + } } }