+ protected readonly pool: IPool<Worker, Data, Response>,
+ protected opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+ ) {
+ this.choose = this.choose.bind(this)
+ }
+
+ protected setTaskStatistics (opts: WorkerChoiceStrategyOptions): void {
+ if (
+ this.taskStatisticsRequirements.avgRunTime &&
+ opts.medRunTime === true
+ ) {
+ this.taskStatisticsRequirements.avgRunTime = false
+ this.taskStatisticsRequirements.medRunTime = opts.medRunTime as boolean
+ }
+ if (
+ this.taskStatisticsRequirements.medRunTime &&
+ opts.medRunTime === false
+ ) {
+ this.taskStatisticsRequirements.avgRunTime = true
+ this.taskStatisticsRequirements.medRunTime = opts.medRunTime as boolean
+ }
+ if (
+ this.taskStatisticsRequirements.avgWaitTime &&
+ opts.medWaitTime === true
+ ) {
+ this.taskStatisticsRequirements.avgWaitTime = false
+ this.taskStatisticsRequirements.medWaitTime = opts.medWaitTime as boolean
+ }
+ if (
+ this.taskStatisticsRequirements.medWaitTime &&
+ opts.medWaitTime === false
+ ) {
+ this.taskStatisticsRequirements.avgWaitTime = true
+ this.taskStatisticsRequirements.medWaitTime = opts.medWaitTime as boolean
+ }
+ }
+
+ /** @inheritDoc */
+ public abstract reset (): boolean
+
+ /** @inheritDoc */
+ public abstract update (workerNodeKey: number): boolean
+
+ /** @inheritDoc */
+ public abstract choose (): number
+
+ /** @inheritDoc */
+ public abstract remove (workerNodeKey: number): boolean
+
+ /** @inheritDoc */
+ public setOptions (opts: WorkerChoiceStrategyOptions): void {
+ opts = opts ?? DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+ this.setTaskStatistics(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()
+ }
+
+ /**
+ * Gets the worker task runtime.
+ * If the task statistics require `avgRunTime`, the average runtime is returned.
+ * If the task statistics require `medRunTime`, the median runtime is returned.
+ *
+ * @param workerNodeKey - The worker node key.
+ * @returns The worker task runtime.
+ */
+ protected getWorkerTaskRunTime (workerNodeKey: number): number {
+ return this.taskStatisticsRequirements.medRunTime
+ ? this.pool.workerNodes[workerNodeKey].workerUsage.runTime.median
+ : this.pool.workerNodes[workerNodeKey].workerUsage.runTime.average
+ }