001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2009 SonarSource SA
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.api.database;
021    
022    public class ThreadLocalDatabaseSessionFactory implements DatabaseSessionFactory {
023    
024      private final ThreadLocal<DatabaseSession> threadSession = new ThreadLocal<DatabaseSession>();
025      private final DatabaseConnector connector;
026    
027      public ThreadLocalDatabaseSessionFactory(DatabaseConnector connector) {
028        this.connector = connector;
029      }
030    
031      public DatabaseSession getSession() {
032        DatabaseSession session = threadSession.get();
033        if (session == null) {
034          session = new DatabaseSession(connector);
035          session.start();
036          threadSession.set(session);
037        }
038        return session;
039      }
040    
041      public void clear() {
042        DatabaseSession session = threadSession.get();
043        if (session != null) {
044          session.stop();
045        }
046        threadSession.set(null);
047      }
048    
049      public void stop() {
050        clear();
051      }
052    }