/**
* ================================================
* LibLoader : a free Java resource loading library
* ================================================
*
* Project Info: http://reporting.pentaho.org/libloader/
*
* (C) Copyright 2006-2008, by Pentaho Corporation and Contributors.
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
*
* ------------
* EHResourceDataCache.java
* ------------
*/
package org.pentaho.reporting.libraries.resourceloader.modules.cache.ehcache;
import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheException;
import net.sf.ehcache.Element;
import org.pentaho.reporting.libraries.resourceloader.ResourceData;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
import org.pentaho.reporting.libraries.resourceloader.ResourceLoadingException;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
import org.pentaho.reporting.libraries.resourceloader.cache.CachingResourceData;
import org.pentaho.reporting.libraries.resourceloader.cache.DefaultResourceDataCacheEntry;
import org.pentaho.reporting.libraries.resourceloader.cache.ResourceDataCache;
import org.pentaho.reporting.libraries.resourceloader.cache.ResourceDataCacheEntry;
/**
* Creation-Date: 13.04.2006, 16:30:34
*
* @author Thomas Morgner
*/
public class EHResourceDataCache implements ResourceDataCache
{
private Cache dataCache;
public EHResourceDataCache(final Cache dataCache)
{
if (dataCache == null)
{
throw new NullPointerException();
}
this.dataCache = dataCache;
}
/**
* Retrieves the given data from the cache.
*
* @param key the resource key for the data.
*/
public ResourceDataCacheEntry get(final ResourceKey key)
{
if (key == null)
{
throw new NullPointerException();
}
try
{
final Element element = dataCache.get(key);
if (element != null)
{
return (ResourceDataCacheEntry) element.getObjectValue();
}
return null;
}
catch (CacheException e)
{
return null;
}
}
/**
* Stores the given data on the cache. The data is registered by its primary
* key. The cache has to store the current version of the data.
*
* @param data the data to be stored in the cache
* @return the resource data object, possibly wrapped by a cache-specific
* implementation.
*/
public ResourceData put(final ResourceManager caller, final ResourceData data) throws ResourceLoadingException
{
if (data == null)
{
throw new NullPointerException();
}
if (caller == null)
{
throw new NullPointerException();
}
final ResourceData cdata = CachingResourceData.createCached(data);
dataCache.put(new Element(data.getKey(), new DefaultResourceDataCacheEntry(cdata, caller)));
return cdata;
}
public void remove(final ResourceData data)
{
if (data == null)
{
throw new NullPointerException();
}
dataCache.remove(data.getKey());
}
/**
* Remove all cached entries. This should be called after the cache has become
* invalid or after it has been removed from a resource manager.
*/
public void clear()
{
try
{
dataCache.removeAll();
}
catch(Exception e)
{
// ignore it ..
}
}
public void shutdown()
{
try
{
dataCache.getCacheManager().shutdown();
}
catch(Exception e)
{
// ignore it ..
}
}
}