Question

我是scala的新手，如果问题很愚蠢，我会事先道歉。我正在浏览这个scala代码，我很困惑以下代码如何工作

abstract class ClusterSimulatorDesc(val runTime: Double) {
  def newSimulator(constantThinkTim: Double,
               perTaskThinkTime: Double,
               blackListPercent: Double,
               schedulerWorkloadsToSweepOver: Map[String, Seq[String]],
               workloadToSchedulerMap: Map[String, Seq[String]],
               cellStateDesc: CellStateDesc,
               workloads: Seq[Workload],
               prefillWorkloads: Seq[Workload],
               logging: Boolean = false): ClusterSimulator
}

class ClusterSimulator(val cellState: CellState,
                   val schedulers: Map[String, Scheduler],
                   val workloadToSchedulerMap: Map[String, Seq[String]],
                   val workloads: Seq[Workload],
                   prefillWorkloads: Seq[Workload],
                   logging: Boolean = false,
                   monitorUtilization: Boolean = true,
                   monitoringPeriod: Double = 1.0)
                  extends Simulator(logging) {

现在，如果我有一个函数调用，如： -

simulatorDesc: ClusterSimulatorDesc
val simulator =
              simulatorDesc.newSimulator(constantThinkTime,
                                         perTaskThinkTime,
                                         blackListPercent,
                                         schedulerWorkloadsToSweepOver,
                                         schedulerWorkloadMap,
                                         workloadDesc.cellStateDesc,
                                         workloads,
                                         prefillWorkloads,
                                         logging)

现在我的问题是，＆＃34; ClusterSimulator＆＃34;在抽象类声明结束时呢？并且，如何调用＆＃34; newSimulator＆＃34;函数发生了，考虑到它在抽象类中声明了吗？

Answer 1

75%

方法def newSimulator(....): ClusterSimulator在调用时会返回newSimulator()的实例。

ClusterSimulator

simulatorDesc: ClusterSimulatorDesc无法实例化，因为它是抽象的，但可以实例化扩展ClusterSimulatorDesc的类，类的实例也 ClusterSimulatorDesc的一个实例，可以调用它的方法。

Scala抽象类函数调用

1 个答案: