| package org.codehaus.plexus.cache.impl; |
| |
| /* |
| * 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 org.codehaus.plexus.cache.Cache; |
| import org.codehaus.plexus.cache.CacheStatistics; |
| |
| |
| /** |
| * Simple no-op provider of a Cache. |
| * <p/> |
| * Nothing is stored, nothing is tracked, no statistics even. |
| * |
| * @author <a href="mailto:Olivier.LAMY@accor.com">Olivier Lamy</a> |
| * @version $Id$ |
| * @since 5 February, 2007 |
| */ |
| public class NoCacheCache |
| implements Cache |
| { |
| class NoStats |
| implements CacheStatistics |
| { |
| |
| public void clear() |
| { |
| /* do nothing */ |
| } |
| |
| public double getCacheHitRate() |
| { |
| return 0; |
| } |
| |
| public long getCacheHits() |
| { |
| return 0; |
| } |
| |
| public long getCacheMiss() |
| { |
| return 0; |
| } |
| |
| public long getSize() |
| { |
| return 0; |
| } |
| } |
| |
| private CacheStatistics stats = new NoStats(); |
| |
| public void clear() |
| { |
| /* do nothing */ |
| } |
| |
| public Object get( Object key ) |
| { |
| return null; |
| } |
| |
| public CacheStatistics getStatistics() |
| { |
| return stats; |
| } |
| |
| public boolean hasKey( Object key ) |
| { |
| return false; |
| } |
| |
| public Object put( Object key, Object value ) |
| { |
| return null; |
| } |
| |
| public void register( Object key, Object value ) |
| { |
| /* do nothing */ |
| } |
| |
| public Object remove( Object key ) |
| { |
| return null; |
| } |
| } |