| /* |
| * Copyright 2010 Niclas Hedhman. |
| * |
| * Licensed 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.zest.cache.ehcache; |
| |
| import net.sf.ehcache.Element; |
| import org.apache.zest.spi.cache.Cache; |
| |
| public class EhCacheImpl<T> |
| implements Cache<T> |
| { |
| private int refCount; |
| private final net.sf.ehcache.Cache backingCache; |
| private final Class<T> valueType; |
| private final String id; |
| |
| public EhCacheImpl( String cacheId, net.sf.ehcache.Cache cache, Class<T> valueType ) |
| { |
| this.id = cacheId; |
| this.backingCache = cache; |
| this.valueType = valueType; |
| } |
| |
| @Override |
| public T get( String key ) |
| { |
| Element element = backingCache.get( key ); |
| if( element == null ) |
| { |
| return null; |
| } |
| return valueType.cast( element.getObjectValue() ); |
| } |
| |
| @Override |
| public T remove( String key ) |
| { |
| T old = valueType.cast( backingCache.get( key ).getObjectValue() ); |
| backingCache.remove( key ); |
| return old; |
| } |
| |
| @Override |
| public void put( String key, T value ) |
| { |
| Element element = new Element( key, value ); |
| backingCache.put( element ); |
| } |
| |
| @Override |
| public boolean exists( String key ) |
| { |
| return backingCache.isKeyInCache( key ); |
| } |
| |
| synchronized void decRefCount() |
| { |
| refCount--; |
| } |
| |
| synchronized void incRefCount() |
| { |
| refCount++; |
| } |
| |
| synchronized boolean isNotUsed() |
| { |
| return refCount == 0; |
| } |
| |
| public String cacheId() |
| { |
| return id; |
| } |
| } |