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Scala example source code file (RemoteGC.scala)
The Scala RemoteGC.scala source code/* __ *\ ** ________ ___ / / ___ Scala API ** ** / __/ __// _ | / / / _ | (c) 2002-2011, LAMP/EPFL ** ** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ ** ** /____/\___/_/ |_/____/_/ | | ** ** |/ ** \* */ // $Id: RemoteGC.scala 17547 2009-04-21 13:56:28Z michelou $ package scala.runtime.remoting import java.lang.ref.{Reference, WeakReference, ReferenceQueue} import java.rmi.{NoSuchObjectException, Remote} import java.rmi.server.UnicastRemoteObject import scala.collection.mutable.HashSet /** * * @author Stephane Micheloud * @version 1.0 */ // Adapted from scala.actors.ActorGC private [runtime] class RemoteGC { private val refQueue = new ReferenceQueue[Remote] private val refSet = new HashSet[Reference[T] forSome { type T <: Remote }] private var liveRefs = 0 def newRef(a: Remote) = synchronized { refSet += new WeakReference(a, refQueue) liveRefs += 1 info("added object reference \""+a+"\" ("+liveRefs+")") } def gc() = synchronized { info("GC called ("+liveRefs+")") // check for unreachable object references def drain() { val wr = refQueue.poll if (wr != null) { val msg = try { UnicastRemoteObject.unexportObject(wr.get, true/*force*/) "removed object reference" } catch { case e: NoSuchObjectException => "object already unbound" } info(msg+" ("+liveRefs+")") liveRefs -= 1 refSet -= wr // continue draining drain() } } drain() } def allClosed: Boolean = synchronized { liveRefs <= 0 } private def info(msg: String) { Debug.info("[RemoteGC] "+msg) } } Other Scala examples (source code examples)Here is a short list of links related to this Scala RemoteGC.scala source code file: |
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