001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2008-2011 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.sonar.core.persistence.Database;
023    import org.sonar.jpa.entity.SchemaMigration;
024    
025    import javax.persistence.EntityManager;
026    
027    public class MemoryDatabaseConnector extends DefaultDatabaseConnector {
028      private int version;
029    
030      public MemoryDatabaseConnector(Database database) {
031        super(database);
032        version = SchemaMigration.LAST_VERSION;
033      }
034    
035      public MemoryDatabaseConnector(Database database, int version) {
036        this(database);
037        this.version = version;
038      }
039    
040      @Override
041      public void start() {
042        try {
043          super.start();
044        } catch (DatabaseException ex) {
045          if (!isStarted()) {
046            throw ex;
047          }
048        }
049        setEntityManagerFactory(createEntityManagerFactory());
050        setupSchemaVersion(version);
051      }
052    
053      protected void setupSchemaVersion(int version) {
054        SchemaMigration migration = new SchemaMigration();
055        migration.setVersion(version);
056        EntityManager manager = null;
057        try {
058          manager = createEntityManager();
059          manager.getTransaction().begin();
060          manager.persist(migration);
061          manager.getTransaction().commit();
062    
063        } finally {
064          if (manager != null) {
065            manager.close();
066          }
067        }
068      }
069    }