Question

我正在使用Scala，它提供了自己的“执行上下文”抽象（与Java的Executor大致相同）。我想与另一个需要ExecutorService的Java库进行交互。是否可以围绕ExecutorService构建Executor包装？

我理解ExecutorService是Executor的子类。但在我的情况下，我只有后者，需要从中构建前者。

如果构造的ExecutorService不提供关闭/等待功能，那对我来说没问题。考虑到submit的实现，我真正关心的是execute的合理实现。

Answer 1

Turning an ExecutionContext to an ExecutorService (or rather and ExecutorService AND an ExecutionContext) using Scala 2.10+

import scala.concurrent.{ExecutionContext, ExecutionContextExecutorService}
import java.util.concurrent.{ AbstractExecutorService, TimeUnit }
import java.util.Collections

object ExecutionContextExecutorServiceBridge {
  def apply(ec: ExecutionContext): ExecutionContextExecutorService = ec match {
    case null => throw null
    case eces: ExecutionContextExecutorService => eces
    case other => new AbstractExecutorService with ExecutionContextExecutorService {
      override def prepare(): ExecutionContext = other
      override def isShutdown = false
      override def isTerminated = false
      override def shutdown() = ()
      override def shutdownNow() = Collections.emptyList[Runnable]
      override def execute(runnable: Runnable): Unit = other execute runnable
      override def reportFailure(t: Throwable): Unit = other reportFailure t
      override def awaitTermination(length: Long,unit: TimeUnit): Boolean = false
    }
  }

或尝试Wrapping a scala.concurrent.ExecutionContext into java.concurrent.ExecutorService

从Executor创建ExecutorService

1 个答案: