Scala WeakReference类代码示例

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本文整理汇总了Scala中scala.ref.WeakReference类的典型用法代码示例。如果您正苦于以下问题：Scala WeakReference类的具体用法？Scala WeakReference怎么用？Scala WeakReference使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了WeakReference类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Scala代码示例。

示例1: WeakExpressionWrapper

//设置package包名称以及导入依赖的类
package com.avsystem.scex
package compiler

import scala.ref.WeakReference
import scala.util.Try


  private class WeakExpressionWrapper(exprDef: ExpressionDef, initiallyWrapped: RawExpression) extends RawExpression {
    var expressionRef = new WeakReference(initiallyWrapped)

    private def wrappedExpression: RawExpression =
      expressionRef.get match {
        case Some(expr) => expr
        case None =>
          expressionRef = new WeakReference(actuallyCompileExpression(exprDef).get)
          wrappedExpression
      }

    def apply(context: ExpressionContext[_, _]) =
      wrappedExpression.apply(context)

    def debugInfo =
      wrappedExpression.debugInfo
  }

  private def actuallyCompileExpression(exprDef: ExpressionDef) =
    super.compileExpression(exprDef)

  override protected def compileExpression(exprDef: ExpressionDef): Try[RawExpression] =
    actuallyCompileExpression(exprDef).map(new WeakExpressionWrapper(exprDef, _))
}

开发者ID:AVSystem，项目名称:scex，代码行数:32，代码来源:WeakReferenceWrappingScexCompiler.scala

示例2: ActorSystems

//设置package包名称以及导入依赖的类
package akkaviz.events

import akka.actor.{ActorPath, ActorRef, ActorSystem}
import akka.viz.ActorCellInstrumentation

import scala.collection.breakOut
import scala.ref.WeakReference
import scala.util.Try

object ActorSystems {

  private[this] val systemReferences = scala.collection.mutable.Map[String, WeakReference[ActorSystem]]()

  def systems: scala.collection.immutable.Map[String, ActorSystem] = systemReferences.flatMap {
    case (name, ref) => ref.get.map {
      system => name -> system
    }
  }(breakOut)

  def registerSystem(system: ActorSystem): Unit = {
    systemReferences.update(system.name, WeakReference(system))
  }

  def tell(path: String, message: Any): Unit = {
    Try {
      val actorPath = ActorPath.fromString(path)
      systems.get(actorPath.address.system).foreach {
        system =>
          system.actorSelection(actorPath).tell(message, ActorRef.noSender)
      }
    }
  }

  def refreshActorState(path: String): Unit = {
    tell(path, ActorCellInstrumentation.RefreshInternalStateMsg)
  }

}

开发者ID:blstream，项目名称:akka-viz，代码行数:39，代码来源:ActorSystems.scala

注：本文中的scala.ref.WeakReference类示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。