/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.wicket.pageStore.memory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Helper class that knows how to remove the nth oldest pages from {@link PageTable}
*/
public class PageTableCleaner
{
private static final Logger LOG = LoggerFactory.getLogger(PageTableCleaner.class);
/**
* Removes {@code pagesNumber} of pages from the {@link PageTable pageTable}
*
* @param pageTable
* the {@link PageTable} to clean
* @param pagesNumber
* the number of pages to remove
*/
public void drop(final PageTable pageTable, final int pagesNumber)
{
for (int i = 0; i < pagesNumber; i++)
{
Integer pageIdOfTheOldest = pageTable.getOldest();
pageTable.removePage(pageIdOfTheOldest);
LOG.debug("Evicted page with id '{}' from the HttpSessionDataStore");
}
}
}