//$Id: EhCache.java 10716 2006-11-03 19:05:11Z max.andersen@jboss.com $
/**
* Copyright 2003-2006 Greg Luck, Jboss Inc
*
* 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 com.eatle.cache;
import java.util.List;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.Element;
import com.eatle.exception.CacheException;
/**
* EHCache
*/
public class EhCache implements Cache
{
private net.sf.ehcache.Cache cache;
/**
* Creates a new Hibernate pluggable cache based on a cache name. <p/>
*
* @param cache The underlying EhCache instance to use.
*/
public EhCache(net.sf.ehcache.Cache cache)
{
this.cache = cache;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public List keys() throws CacheException
{
return this.cache.getKeys();
}
/**
* Gets a value of an element which matches the given key.
*
* @param key the key of the element to return.
* @return The value placed into the cache with an earlier put, or null if
* not found or expired
* @throws CacheException
*/
public Object get(Object key) throws CacheException
{
try
{
if (key == null)
return null;
else
{
Element element = cache.get(key);
if (element != null)
return element.getObjectValue();
}
return null;
}
catch (net.sf.ehcache.CacheException e)
{
throw new CacheException(e);
}
}
/**
* Puts an object into the cache.
*
* @param key a key
* @param value a value
* @throws CacheException if the {@link CacheManager} is shutdown or another
* {@link Exception} occurs.
*/
public void update(Object key, Object value) throws CacheException
{
put(key, value);
}
/**
* Puts an object into the cache.
*
* @param key a key
* @param value a value
* @throws CacheException if the {@link CacheManager} is shutdown or another
* {@link Exception} occurs.
*/
public void put(Object key, Object value) throws CacheException
{
try
{
Element element = new Element(key, value);
cache.put(element);
}
catch (IllegalArgumentException e)
{
throw new CacheException(e);
}
catch (IllegalStateException e)
{
throw new CacheException(e);
}
catch (net.sf.ehcache.CacheException e)
{
throw new CacheException(e);
}
}
/**
* Removes the element which matches the key. <p/> If no element matches,
* nothing is removed and no Exception is thrown.
*
* @param key the key of the element to remove
* @throws CacheException
*/
public void remove(Object key) throws CacheException
{
try
{
cache.remove(key);
}
catch (IllegalStateException e)
{
throw new CacheException(e);
}
catch (net.sf.ehcache.CacheException e)
{
throw new CacheException(e);
}
}
/**
* Remove all elements in the cache, but leave the cache in a useable state.
*
* @throws CacheException
*/
public void clear() throws CacheException
{
try
{
cache.removeAll();
}
catch (IllegalStateException e)
{
throw new CacheException(e);
}
catch (net.sf.ehcache.CacheException e)
{
throw new CacheException(e);
}
}
/**
* Remove the cache and make it unuseable.
*
* @throws CacheException
*/
public void destroy() throws CacheException
{
try
{
cache.getCacheManager().removeCache(cache.getName());
}
catch (IllegalStateException e)
{
throw new CacheException(e);
}
catch (net.sf.ehcache.CacheException e)
{
throw new CacheException(e);
}
}
}