-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'
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)
]
])
}
*
* @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.
- * @throws {@link https://nodejs.org/api/errors.html#class-rangeerror} If the maximum consecutive worker choice strategy executions has been reached.
*/
public execute (): number {
const workerChoiceStrategy = this.workerChoiceStrategies.get(
this.workerChoiceStrategy
) as IWorkerChoiceStrategy
+ if (!workerChoiceStrategy.hasPoolWorkerNodesReady()) {
+ return this.execute()
+ }
+ 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
- const maxExecutionCount = 10000
- let executionCount = 0
let chooseCount = 0
let retriesCount = 0
do {
- if (workerChoiceStrategy.hasPoolWorkerNodesReady()) {
- workerNodeKey = workerChoiceStrategy.choose()
- if (chooseCount > 0) {
- retriesCount++
- }
- chooseCount++
+ workerNodeKey = workerChoiceStrategy.choose()
+ if (workerNodeKey == null && chooseCount > 0) {
+ retriesCount++
}
- executionCount++
+ chooseCount++
} while (
- executionCount < maxExecutionCount &&
- (!workerChoiceStrategy.hasPoolWorkerNodesReady() ||
- (workerNodeKey == null && retriesCount < (this.opts.retries as number)))
+ workerNodeKey == null &&
+ retriesCount < (this.opts?.retries as number)
)
- if (executionCount >= maxExecutionCount) {
- throw new RangeError(
- `Worker choice strategy consecutive executions has exceeded the maximum of ${maxExecutionCount}`
- )
- }
if (workerNodeKey == null) {
throw new Error(
`Worker node key chosen is null or undefined after ${retriesCount} retries`
/**
* 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)
}
}
}