/* XXL: The eXtensible and fleXible Library for data processing
Copyright (C) 2000-2011 Prof. Dr. Bernhard Seeger
Head of the Database Research Group
Department of Mathematics and Computer Science
University of Marburg
Germany
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library 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 library; If not, see <http://www.gnu.org/licenses/>.
http://code.google.com/p/xxl/
*/
package xxl.core.collections.queues;
import java.util.List;
import xxl.core.collections.sweepAreas.DefaultMemoryManageableSA.EveryQth;
import xxl.core.cursors.Cursors;
import xxl.core.cursors.filters.Filter;
import xxl.core.cursors.filters.Remover;
public class MemoryManageableListQueue<E> extends AbstractMemoryManageableQueue<E> {
public MemoryManageableListQueue(int objectSize) {
super(new ListQueue<E>(), objectSize);
}
public void handleOverflow() {
if (getCurrentMemUsage() <= assignedMemSize)
return;
int realNoOfObjects = size();
int maxAllowedNoOfObjects = 4*assignedMemSize/(5*objectSize);
int overage = realNoOfObjects - maxAllowedNoOfObjects;
List<E> list = ((ListQueue<E>)queue).list;
Cursors.consume(new Remover(new Filter<E>(list.iterator(), new EveryQth<E>(realNoOfObjects, overage))));
((ListQueue<E>)queue).size = list.size();
}
}