alfresco-community-repo/source/java/org/alfresco/repo/cache/DefaultCacheProvider.java

/*
 * Copyright (C) 2005-2012 Alfresco Software Limited.
 *
 * This file is part of Alfresco
 *
 * Alfresco 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 3 of the License, or
 * (at your option) any later version.
 *
 * Alfresco 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 Alfresco. If not, see <http://www.gnu.org/licenses/>.
 */
package org.alfresco.repo.cache;

import java.io.Serializable;
import java.util.Properties;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.cache.Cache;
import org.hibernate.cache.CacheException;
import org.hibernate.cache.CacheProvider;
import org.hibernate.cache.Timestamper;

/**
 * A simple {@link CacheProvider} that allows Hibernate to create {@link DefaultSimpleCache}
 * based caches.
 *
 * @author Matt Ward
 */
public class DefaultCacheProvider implements CacheProvider
{
    private final static Log log = LogFactory.getLog(DefaultCacheProvider.class);
    // TODO: setup in spring (SystemPropertiesSetterBean)
    private int defaultMaxItems = 500;
    
    @Override
    public Cache buildCache(String regionName, Properties properties) throws CacheException
    {
        if (log.isDebugEnabled())
        {
            log.debug("building cache for regionName=" + regionName + ", with properties: " + properties);
        }
        DefaultSimpleCache<Serializable, Object> cache = new DefaultSimpleCache<Serializable, Object>();
        cache.setMaxItems(defaultMaxItems);
        Cache hibCache = new HibernateSimpleCacheAdapter(cache, regionName);
        return hibCache;
    }

    @Override
    public long nextTimestamp()
    {
        return Timestamper.next();
    }

    @Override
    public void start(Properties properties) throws CacheException
    {
        log.debug("Starting cache provider");
    }

    @Override
    public void stop()
    {
        log.debug("Stopping cache provider");
    }

    @Override
    public boolean isMinimalPutsEnabledByDefault()
    {
        return false;
    }

}