com.mchange.v1.cachedstore.ManualCleanupSoftKeyCachedStore Maven / Gradle / Ivy
/*
* Distributed as part of mchange-commons-java v.0.2.3
*
* Copyright (C) 2012 Machinery For Change, Inc.
*
* Author: Steve Waldman
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1, as
* published by the Free Software Foundation.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this software; see the file LICENSE. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
package com.mchange.v1.cachedstore;
import java.lang.ref.ReferenceQueue;
class ManualCleanupSoftKeyCachedStore extends KeyTransformingCachedStore implements Vacuumable
{
ReferenceQueue queue = new ReferenceQueue();
public ManualCleanupSoftKeyCachedStore(CachedStore.Manager manager)
{ super( manager ); }
protected Object toUserKey( Object cachePutKey )
{ return ((SoftKey) cachePutKey).get(); }
protected Object toCacheFetchKey( Object userKey )
{ return new SoftKey( userKey, null ); }
protected Object toCachePutKey( Object userKey )
{ return new SoftKey( userKey, queue ); }
public void vacuum() throws CachedStoreException
{
SoftKey key;
while ((key = (SoftKey) queue.poll()) != null)
{
//System.err.println("Vacuuming Key ---> " + key);
this.removeByTransformedKey( key );
}
}
}