| package org.apache.commons.jcs3.engine.memory.fifo; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.io.IOException; |
| |
| import org.apache.commons.jcs3.engine.behavior.ICacheElement; |
| import org.apache.commons.jcs3.engine.memory.AbstractDoubleLinkedListMemoryCache; |
| import org.apache.commons.jcs3.engine.memory.util.MemoryElementDescriptor; |
| |
| /** |
| * The items are spooled in the order they are added. No adjustments to the list are made on get. |
| */ |
| public class FIFOMemoryCache<K, V> |
| extends AbstractDoubleLinkedListMemoryCache<K, V> |
| { |
| /** |
| * Puts an item to the cache. Removes any pre-existing entries of the same key from the linked |
| * list and adds this one first. |
| * <p> |
| * @param ce The cache element, or entry wrapper |
| * @return MemoryElementDescriptor the new node |
| * @throws IOException |
| */ |
| @Override |
| protected MemoryElementDescriptor<K, V> adjustListForUpdate( ICacheElement<K, V> ce ) |
| throws IOException |
| { |
| return addFirst( ce ); |
| } |
| |
| /** |
| * Does nothing. |
| * <p> |
| * @param me |
| */ |
| @Override |
| protected void adjustListForGet( MemoryElementDescriptor<K, V> me ) |
| { |
| // DO NOTHING |
| } |
| } |