-import { DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS } from '../../utils'
+import { buildInternalWorkerChoiceStrategyOptions } from '../../utils'
import type { IPool } from '../pool'
import type { IWorker } from '../worker'
import { FairShareWorkerChoiceStrategy } from './fair-share-worker-choice-strategy'
import { RoundRobinWorkerChoiceStrategy } from './round-robin-worker-choice-strategy'
import type {
IWorkerChoiceStrategy,
+ InternalWorkerChoiceStrategyOptions,
StrategyPolicy,
TaskStatisticsRequirements,
- WorkerChoiceStrategy,
- WorkerChoiceStrategyOptions
+ WorkerChoiceStrategy
} from './selection-strategies-types'
import { WorkerChoiceStrategies } from './selection-strategies-types'
import { WeightedRoundRobinWorkerChoiceStrategy } from './weighted-round-robin-worker-choice-strategy'
IWorkerChoiceStrategy
>
- /**
- * The number of times the worker choice strategy in the context has been retried.
- */
- private choiceRetriesCount = 0
-
/**
* Worker choice strategy context constructor.
*
public constructor (
pool: IPool<Worker, Data, Response>,
private workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN,
- private opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+ private opts?: InternalWorkerChoiceStrategyOptions
) {
- this.opts = { ...DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS, ...opts }
+ this.opts = buildInternalWorkerChoiceStrategyOptions(
+ pool.info.maxSize,
+ this.opts
+ )
this.execute = this.execute.bind(this)
this.workerChoiceStrategies = new Map<
WorkerChoiceStrategy,
WorkerChoiceStrategies.ROUND_ROBIN,
new (RoundRobinWorkerChoiceStrategy.bind(this))<Worker, Data, Response>(
pool,
- opts
+ this.opts
)
],
[
WorkerChoiceStrategies.LEAST_USED,
new (LeastUsedWorkerChoiceStrategy.bind(this))<Worker, Data, Response>(
pool,
- opts
+ this.opts
)
],
[
WorkerChoiceStrategies.LEAST_BUSY,
new (LeastBusyWorkerChoiceStrategy.bind(this))<Worker, Data, Response>(
pool,
- opts
+ this.opts
)
],
[
WorkerChoiceStrategies.LEAST_ELU,
new (LeastEluWorkerChoiceStrategy.bind(this))<Worker, Data, Response>(
pool,
- opts
+ this.opts
)
],
[
WorkerChoiceStrategies.FAIR_SHARE,
new (FairShareWorkerChoiceStrategy.bind(this))<Worker, Data, Response>(
pool,
- opts
+ this.opts
)
],
[
Worker,
Data,
Response
- >(pool, opts)
+ >(pool, this.opts)
],
[
WorkerChoiceStrategies.INTERLEAVED_WEIGHTED_ROUND_ROBIN,
Worker,
Data,
Response
- >(pool, opts)
+ >(pool, this.opts)
]
])
}
* 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 the worker node key is null or undefined.
+ * @throws {@link https://nodejs.org/api/errors.html#class-error} If after configured retries the worker node key is null or undefined.
*/
public execute (): number {
- const workerNodeKey = (
- this.workerChoiceStrategies.get(
- this.workerChoiceStrategy
- ) as IWorkerChoiceStrategy
- ).choose()
- if (
- workerNodeKey == null &&
- this.choiceRetriesCount < (this.opts.choiceRetries as number)
- ) {
- this.choiceRetriesCount++
+ const workerChoiceStrategy = this.workerChoiceStrategies.get(
+ this.workerChoiceStrategy
+ ) as IWorkerChoiceStrategy
+ if (!workerChoiceStrategy.hasPoolWorkerNodesReady()) {
return this.execute()
- } else if (workerNodeKey == null) {
- throw new TypeError(
- `Worker node key chosen is null or undefined after ${this.choiceRetriesCount} retries`
+ }
+ return this.executeStrategy(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 configured 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++
+ }
+ chooseCount++
+ } while (
+ workerNodeKey == null &&
+ retriesCount < (this.opts?.retries as number)
+ )
+ if (workerNodeKey == null) {
+ throw new Error(
+ `Worker node key chosen is null or undefined after ${retriesCount} retries`
)
}
return workerNodeKey
/**
* Sets the worker choice strategies in the context options.
*
+ * @param pool - The pool instance.
* @param opts - The worker choice strategy options.
*/
- public setOptions (opts: WorkerChoiceStrategyOptions): void {
- this.opts = { ...DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS, ...opts }
+ public setOptions (
+ pool: IPool<Worker, Data, Response>,
+ opts?: InternalWorkerChoiceStrategyOptions
+ ): void {
+ this.opts = buildInternalWorkerChoiceStrategyOptions(
+ pool.info.maxSize,
+ opts
+ )
for (const workerChoiceStrategy of this.workerChoiceStrategies.values()) {
- workerChoiceStrategy.setOptions(opts)
+ workerChoiceStrategy.setOptions(this.opts)
}
}
}