/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.etk.component.database.impl;
import org.etk.kernel.cache.ExoCache;
import org.hibernate.cache.Cache;
import org.hibernate.cache.CacheException;
import org.hibernate.cache.Timestamper;
import java.io.Serializable;
import java.util.Map;
/**
* Jul 17, 2004
*
* @author: Tuan Nguyen
* @email: tuan08@users.sourceforge.net
* @version: $Id: ExoCachePlugin.java,v 1.1 2004/08/29 21:47:58 benjmestrallet
* Exp $
*/
public class ExoCachePlugin implements Cache {
private ExoCache<Serializable, Object> cache_;
public ExoCachePlugin(ExoCache<Serializable, Object> cache) {
cache_ = cache;
}
/**
* {@inheritDoc}
*/
public Object get(Object key) throws CacheException {
try {
return cache_.get((Serializable) key);
} catch (Exception ex) {
throw new CacheException(ex);
}
}
/**
* Get an item from the cache
*
* @param key
* @return the cached object or <tt>null</tt>
* @throws CacheException
*/
public Object read(Object key) throws CacheException {
return get(key);
}
/**
* {@inheritDoc}
*/
public void put(Object key, Object value) throws CacheException {
try {
cache_.put((Serializable) key, (Serializable) value);
} catch (Exception ex) {
throw new CacheException(ex);
}
}
/**
* Add an item to the cache
*
* @param key
* @param value
* @throws CacheException
*/
public void update(Object key, Object value) throws CacheException {
put(key, value);
}
/**
* {@inheritDoc}
*/
public void remove(Object key) throws CacheException {
try {
cache_.remove((Serializable) key);
} catch (Exception ex) {
throw new CacheException(ex);
}
}
/**
* {@inheritDoc}
*/
public void clear() throws CacheException {
try {
cache_.clearCache();
} catch (Exception ex) {
throw new CacheException(ex);
}
}
/**
* {@inheritDoc}
*/
public void destroy() throws CacheException {
}
/**
* {@inheritDoc}
*/
public void lock(Object key) throws CacheException {
}
/**
* {@inheritDoc}
*/
public void unlock(Object key) throws CacheException {
}
/**
* {@inheritDoc}
*/
public long nextTimestamp() {
return Timestamper.next();
}
/**
* Returns the lock timeout for this cache.
*/
public int getTimeout() {
return Timestamper.ONE_MS * 60000;
}
/**
* Get the name of the cache region
*/
public String getRegionName() {
return cache_.getName();
}
/**
* The number of bytes is this cache region currently consuming in memory.
*
* @return The number of bytes consumed by this region; -1 if unknown or
* unsupported.
*/
public long getSizeInMemory() {
return -1;
}
/**
* The count of entries currently contained in the regions in-memory store.
*
* @return The count of entries in memory; -1 if unknown or unsupported.
*/
public long getElementCountInMemory() {
return -1;
}
/**
* The count of entries currently contained in the regions disk store.
*
* @return The count of entries on disk; -1 if unknown or unsupported.
*/
public long getElementCountOnDisk() {
return -1;
}
/**
* optional operation
*/
@SuppressWarnings("unchecked")
public Map toMap() {
return null;
}
}