com.mchange.v1.cachedstore.ManualCleanupSoftKeyCachedStore Maven / Gradle / Ivy
/*
* Distributed as part of mchange-commons-java 0.2.11
*
* Copyright (C) 2015 Machinery For Change, Inc.
*
* Author: Steve Waldman
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of EITHER:
*
* 1) The GNU Lesser General Public License (LGPL), version 2.1, as
* published by the Free Software Foundation
*
* OR
*
* 2) The Eclipse Public License (EPL), version 1.0
*
* You may choose which license to accept if you wish to redistribute
* or modify this work. You may offer derivatives of this work
* under the license you have chosen, or you may provide the same
* choice of license which you have been offered here.
*
* 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.
*
* You should have received copies of both LGPL v2.1 and EPL v1.0
* along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
* If not, the text of these licenses are currently available at
*
* LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php
*
*/
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 );
}
}
}