public abstract class RefCounted<Type>
extends java.lang.Object
Keep track of a reference count on a resource and close it when
the count hits zero.
By itself, this class could have some race conditions
since there is no synchronization between the refcount
check and the close. Solr's use in reference counting searchers
is safe since the count can only hit zero if it's unregistered (and
hence incref() will not be called again on it).
- Version:
- $Id: RefCounted.java 779125 2009-05-27 11:58:18Z noble $