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SmartWeb is a web application development meta framework based on Jakarta Struts, Hibernate and other open source frameworks and libraries.

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/*
 * The SmartWeb Framework
 * Copyright (C) 2004-2006
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * For further informations on the SmartWeb Framework please visit
 *
 *                        http://smartweb.sourceforge.net
 */
package net.smartlab.web.config;

import java.net.URL;
import java.util.Map;
import java.util.TreeMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import net.smartlab.web.BusinessObjectFactory;
import net.smartlab.web.Domain;

/**
 * The Hibernate configuration file used must reside into the
 * META-INF directory of the topmost packaging archive and should
 * be named smartweb.jar.hcf or have the name of the JAR file
 * containing the subclass followed by the .hcf suffix.
 * 
 * @author rlogiacco
 */
public class TomcatConfigurationStrategy implements FactoryConfigurationStrategy {

	/**
	 * TODO documentation
	 */
	private Map factories = new TreeMap();

	/**
	 * Provides logging capabilities to the strategy.
	 */
	protected final Log logger = LogFactory.getLog(TomcatConfigurationStrategy.class);


	/**
	 * @see net.smartlab.web.config.FactoryConfigurationStrategy#getSessionFactory(net.smartlab.web.BusinessObjectFactory)
	 */
	public SessionFactory getSessionFactory(BusinessObjectFactory bof) {
		synchronized (BusinessObjectFactory.class) {
			String archive = Domain.getLastArchiveName(bof.getClass());
			URL file = Domain.getResource(bof.getClass(), new String[] {"/META-INF/" + archive + ".hcf",
					"/META-INF/smartweb.jar.hcf"});
			try {
				if (!factories.containsKey(file.toString())) {
					// Session factory not found in cache
					logger.warn("getSessionFactory() - configure hibernate without JNDI");
					SessionFactory factory = new Configuration().configure(file).buildSessionFactory();
					factories.put(file.toString(), factory);
				}
				return (SessionFactory)factories.get(file.toString());
			} catch (Exception e) {
				logger.error("getSessionFactory() - error", e);
				return null;
			}
		}
	}
}