simtools.util
Class ListenerManager.ReferenceCountedPointer

java.lang.Object
  java.lang.ref.Reference<T>
      java.lang.ref.WeakReference
          simtools.util.ListenerManager.ReferenceCountedPointer

Enclosing class:

ListenerManager

public class ListenerManager.ReferenceCountedPointer
extends java.lang.ref.WeakReference

This inner class is a Weak Reference using refcounting, as described in the note above. It is a static inner class because the ListenerManager reference would otherwise prevent the garbage-collector to destroy the ListenerManagers themselves. Unfortunately, a reference to the listener manager is still required, so as to make only one ReferenceQueue helper thread, and not one thread per ListenerManager. So, use a weak reference to the lisener manager too!

Field Summary

java.lang.ref.WeakReference	manager
int	refcount

Constructor Summary

ListenerManager.ReferenceCountedPointer(ListenerManager mgr, java.lang.Object o)

Method Summary

Methods inherited from class java.lang.ref.Reference

clear, enqueue, get, isEnqueued

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

refcount

public int refcount

manager

public java.lang.ref.WeakReference manager

Constructor Detail

ListenerManager.ReferenceCountedPointer

public ListenerManager.ReferenceCountedPointer(ListenerManager mgr,
                                               java.lang.Object o)