org.bedework.util.hibernate.HibSessionFactory.java Source code

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Here is the source code for org.bedework.util.hibernate.HibSessionFactory.java

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/* ********************************************************************
Licensed to Jasig under one or more contributor license
agreements. See the NOTICE file distributed with this work
for additional information regarding copyright ownership.
Jasig licenses this file to you 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 org.bedework.util.hibernate;

import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

import java.io.StringReader;
import java.util.List;
import java.util.Properties;

/** Convenience class to do the actual hibernate interaction. Intended for
 * one use only.
 *
 * @author Mike Douglass douglm@bedework.edu
 */
public class HibSessionFactory {
    private static SessionFactory sessionFactory;

    private static volatile Object lock = new Object();

    /**
     * @param hibProps possibly null list of hibernate properties
     * @return the SessionFactory
     * @throws HibException
     */
    public static SessionFactory getSessionFactory(List<String> hibProps) throws HibException {
        if (sessionFactory != null) {
            return sessionFactory;
        }

        synchronized (lock) {
            if (sessionFactory != null) {
                return sessionFactory;
            }

            /** Get a new hibernate session factory. This is configured from an
             * application resource hibernate.cfg.xml together with some run time values
             */
            try {
                Configuration conf = new Configuration();

                /*
                if (props != null) {
                  String cachePrefix = props.getProperty("cachePrefix");
                  if (cachePrefix != null) {
                    conf.setProperty("hibernate.cache.use_second_level_cache",
                         props.getProperty("cachingOn"));
                    conf.setProperty("hibernate.cache.region_prefix",
                         cachePrefix);
                  }
                }
                */

                if (hibProps != null) {
                    StringBuilder sb = new StringBuilder();

                    for (String p : hibProps) {
                        sb.append(p);
                        sb.append("\n");
                    }

                    Properties hprops = new Properties();
                    hprops.load(new StringReader(sb.toString()));

                    conf.addProperties(hprops);
                }

                conf.configure();

                sessionFactory = conf.buildSessionFactory();

                return sessionFactory;
            } catch (Throwable t) {
                throw new HibException(t);
            }
        }
    }
}