001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2008-2012 SonarSource
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * Sonar is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    package org.sonar.jpa.session;
021    
022    import org.slf4j.Logger;
023    import org.slf4j.LoggerFactory;
024    import org.sonar.core.persistence.Database;
025    import org.sonar.core.persistence.DatabaseVersion;
026    import org.sonar.core.persistence.dialect.Dialect;
027    
028    import javax.persistence.EntityManager;
029    import javax.persistence.EntityManagerFactory;
030    import javax.persistence.Persistence;
031    import java.util.Map;
032    import java.util.Properties;
033    
034    public abstract class AbstractDatabaseConnector implements DatabaseConnector {
035      protected static final Logger LOG = LoggerFactory.getLogger(AbstractDatabaseConnector.class);
036    
037      protected Database database;
038      private EntityManagerFactory factory = null;
039    
040      protected AbstractDatabaseConnector(Database database) {
041        this.database = database;
042      }
043    
044      public void start() {
045        LOG.info("Initializing Hibernate");
046        factory = createEntityManagerFactory();
047    
048      }
049    
050      public void stop() {
051        if (factory != null && factory.isOpen()) {
052          factory.close();
053          factory = null;
054        }
055        database = null;
056      }
057    
058      public EntityManagerFactory getEntityManagerFactory() {
059        return factory;
060      }
061    
062      protected EntityManagerFactory createEntityManagerFactory() {
063        // other settings are stored into /META-INF/persistence.xml
064        Properties props = database.getHibernateProperties();
065        logHibernateSettings(props);
066        return Persistence.createEntityManagerFactory("sonar", props);
067      }
068    
069      private void logHibernateSettings(Properties props) {
070        if (LOG.isDebugEnabled()) {
071          for (Map.Entry<Object, Object> entry : props.entrySet()) {
072            LOG.debug(entry.getKey() + ": " + entry.getValue());
073          }
074        }
075      }
076    
077      public EntityManager createEntityManager() {
078        return factory.createEntityManager();
079      }
080    
081      public final int getDatabaseVersion() {
082        throw new UnsupportedOperationException("Moved to " + DatabaseVersion.class.getCanonicalName());
083      }
084    
085      public final Dialect getDialect() {
086        return database.getDialect();
087      }
088    }