+ /** @inheritDoc */
+ public abstract remove (workerNodeKey: number): boolean
+
+ /** @inheritDoc */
+ public setOptions (opts: WorkerChoiceStrategyOptions): void {
+ this.opts = opts ?? DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+ this.setTaskStatisticsRequirements(this.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 the average runtime, the average runtime is returned.
+ * If the task statistics require the median runtime , the median runtime is returned.
+ *
+ * @param workerNodeKey - The worker node key.
+ * @returns The worker task runtime.
+ */
+ protected getWorkerTaskRunTime (workerNodeKey: number): number {
+ return this.taskStatisticsRequirements.runTime.median
+ ? this.pool.workerNodes[workerNodeKey].usage.runTime.median
+ : this.pool.workerNodes[workerNodeKey].usage.runTime.average
+ }
+
+ /**
+ * Gets the worker task wait time.
+ * If the task statistics require the average wait time, the average wait time is returned.
+ * If the task statistics require the median wait time, the median wait time is returned.
+ *
+ * @param workerNodeKey - The worker node key.
+ * @returns The worker task wait time.
+ */
+ protected getWorkerTaskWaitTime (workerNodeKey: number): number {
+ return this.taskStatisticsRequirements.waitTime.median
+ ? this.pool.workerNodes[workerNodeKey].usage.waitTime.median
+ : this.pool.workerNodes[workerNodeKey].usage.waitTime.average
+ }
+
+ /**
+ * Gets the worker task ELU.
+ * If the task statistics require the average ELU, the average ELU is returned.
+ * If the task statistics require the median ELU, the median ELU is returned.
+ *
+ * @param workerNodeKey - The worker node key.
+ * @returns The worker task ELU.
+ */
+ protected getWorkerTaskElu (workerNodeKey: number): number {
+ return this.taskStatisticsRequirements.elu.median
+ ? this.pool.workerNodes[workerNodeKey].usage.elu.active.median
+ : this.pool.workerNodes[workerNodeKey].usage.elu.active.average
+ }
+
+ protected computeDefaultWorkerWeight (): number {
+ let cpusCycleTimeWeight = 0
+ for (const cpu of cpus()) {
+ // CPU estimated cycle time
+ const numberOfDigits = cpu.speed.toString().length - 1
+ const cpuCycleTime = 1 / (cpu.speed / Math.pow(10, numberOfDigits))
+ cpusCycleTimeWeight += cpuCycleTime * Math.pow(10, numberOfDigits)
+ }
+ return Math.round(cpusCycleTimeWeight / cpus().length)
+ }
+
+ // /**
+ // * Finds the first free worker node key based on the number of tasks the worker has applied.
+ // *
+ // * If a worker is found with `0` executing 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.usage.tasks.executing === 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` executing 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.pool.workerNodes.findLastIndex(workerNode => {
+ // // return workerNode.usage.tasks.executing === 0
+ // // })
+ // for (
+ // let workerNodeKey = this.pool.workerNodes.length - 1;
+ // workerNodeKey >= 0;
+ // workerNodeKey--
+ // ) {
+ // if (this.pool.workerNodes[workerNodeKey].usage.tasks.executing === 0) {
+ // return workerNodeKey
+ // }
+ // }
+ // return -1
+ // }