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.sonar.api.database.DatabaseSession;
023    
024    public class ThreadLocalDatabaseSessionFactory implements DatabaseSessionFactory {
025    
026      private final ThreadLocal<JpaDatabaseSession> threadSession = new ThreadLocal<JpaDatabaseSession>();
027      private final DatabaseConnector connector;
028    
029      public ThreadLocalDatabaseSessionFactory(DatabaseConnector connector) {
030        this.connector = connector;
031      }
032    
033      public DatabaseSession getSession() {
034        JpaDatabaseSession session = threadSession.get();
035        if (session == null) {
036          session = new JpaDatabaseSession(connector);
037          session.start();
038          threadSession.set(session);
039        }
040        return session;
041      }
042    
043      public void clear() {
044        JpaDatabaseSession session = threadSession.get();
045        if (session != null) {
046          session.stop();
047        }
048        threadSession.set(null);
049      }
050    
051      public void stop() {
052        clear();
053      }
054    }