*
* @typeParam Worker - Type of worker which manages the strategy.
* @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 Response - Type of execution response. This can only be serializable data.
*/
export abstract class AbstractWorkerChoiceStrategy<
Worker extends IWorker,
Data = unknown,
Response = unknown
> implements IWorkerChoiceStrategy {
+ /**
+ * Toggles finding the last free worker node key.
+ */
+ private toggleFindLastFreeWorkerNodeKey: boolean = false
/** @inheritDoc */
protected readonly isDynamicPool: boolean
/** @inheritDoc */
*/
public constructor (
protected readonly pool: IPool<Worker, Data, Response>,
- protected readonly opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+ protected opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
) {
- this.checkOptions(this.opts)
this.isDynamicPool = this.pool.type === PoolType.DYNAMIC
- this.choose.bind(this)
+ this.choose = this.choose.bind(this)
}
- private checkOptions (opts: WorkerChoiceStrategyOptions): void {
+ protected checkOptions (opts: WorkerChoiceStrategyOptions): void {
if (this.requiredStatistics.avgRunTime && opts.medRunTime === true) {
- this.requiredStatistics.medRunTime = true
+ this.requiredStatistics.avgRunTime = false
+ this.requiredStatistics.medRunTime = opts.medRunTime as boolean
+ }
+ if (this.requiredStatistics.medRunTime && opts.medRunTime === false) {
+ this.requiredStatistics.avgRunTime = true
+ this.requiredStatistics.medRunTime = opts.medRunTime as boolean
}
}
/** @inheritDoc */
public abstract remove (workerNodeKey: number): boolean
+
+ /** @inheritDoc */
+ public setOptions (opts: WorkerChoiceStrategyOptions): void {
+ opts = opts ?? DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+ this.checkOptions(opts)
+ this.opts = opts
+ }
+
+ /**
+ * Finds a free worker node key.
+ *
+ * @returns The free worker node key or `-1` if there is no free worker node.
+ */
+ protected findFreeWorkerNodeKey (): number {
+ if (this.toggleFindLastFreeWorkerNodeKey) {
+ this.toggleFindLastFreeWorkerNodeKey = false
+ return this.findLastFreeWorkerNodeKey()
+ }
+ this.toggleFindLastFreeWorkerNodeKey = true
+ return this.findFirstFreeWorkerNodeKey()
+ }
+
+ /**
+ * Finds the first free worker node key based on the number of tasks the worker has applied.
+ *
+ * If a worker is found with `0` running tasks, it is detected as free and its worker node key is returned.
+ *
+ * If no free worker is found, `-1` is returned.
+ *
+ * @returns A worker node key if there is one, `-1` otherwise.
+ */
+ private findFirstFreeWorkerNodeKey (): number {
+ return this.pool.workerNodes.findIndex(workerNode => {
+ return workerNode.tasksUsage?.running === 0
+ })
+ }
+
+ /**
+ * Finds the last free worker node key based on the number of tasks the worker has applied.
+ *
+ * If a worker is found with `0` running tasks, it is detected as free and its worker node key is returned.
+ *
+ * If no free worker is found, `-1` is returned.
+ *
+ * @returns A worker node key if there is one, `-1` otherwise.
+ */
+ private findLastFreeWorkerNodeKey (): number {
+ // It requires node >= 18.0.0
+ // return this.workerNodes.findLastIndex(workerNode => {
+ // return workerNode.tasksUsage?.running === 0
+ // })
+ for (let i = this.pool.workerNodes.length - 1; i >= 0; i--) {
+ if (this.pool.workerNodes[i].tasksUsage?.running === 0) {
+ return i
+ }
+ }
+ return -1
+ }
}