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.server.startup;
021    
022    import org.sonar.api.database.DatabaseSession;
023    import org.sonar.api.database.model.MeasureModel;
024    import org.sonar.api.platform.ServerUpgradeStatus;
025    import org.sonar.api.utils.Logs;
026    import org.sonar.jpa.session.DatabaseSessionFactory;
027    
028    import javax.persistence.Query;
029    import java.util.List;
030    
031    /**
032     * This purge script can not be executed with ActiveRecord. It fails with an out of memory error.
033     *
034     * @since 2.5 this component could be removed after 4 or 5 releases.
035     */
036    public final class DeleteDeprecatedMeasures {
037    
038      private ServerUpgradeStatus status;
039      private DatabaseSessionFactory sessionFactory;
040      private static final int MAX_IN_ELEMENTS = 500;
041    
042      public DeleteDeprecatedMeasures(DatabaseSessionFactory sessionFactory, ServerUpgradeStatus status) {
043        this.sessionFactory = sessionFactory;
044        this.status = status;
045      }
046    
047      public void start() {
048        if (mustDoPurge()) {
049          doPurge();
050        }
051      }
052    
053      boolean mustDoPurge() {
054        return status.isUpgraded() && status.getInitialDbVersion() <= 162;
055      }
056    
057      void doPurge() {
058        Logs.INFO.info("Deleting measures with deprecated ISO category");
059        deleteRows("SELECT m.id FROM " + MeasureModel.class.getSimpleName() + " m WHERE m.ruleId IS NULL AND m.rulesCategoryId IS NOT NULL");
060    
061        Logs.INFO.info("Deleting measures with deprecated priority");
062        deleteRows("SELECT m.id FROM " + MeasureModel.class.getSimpleName() + " m WHERE m.ruleId IS NULL AND m.rulePriority IS NOT NULL");
063      }
064    
065      private void deleteRows(String hql) {
066        DatabaseSession session = sessionFactory.getSession();
067        List ids = session.getEntityManager().createQuery(hql).getResultList();
068        int index = 0;
069        while (index < ids.size()) {
070          List paginedSids = ids.subList(index, Math.min(ids.size(), index + MAX_IN_ELEMENTS));
071          Query query = session.createQuery("DELETE FROM " + MeasureModel.class.getSimpleName() + " WHERE id IN (:ids)");
072          query.setParameter("ids", paginedSids);
073          query.executeUpdate();
074          index += MAX_IN_ELEMENTS;
075          session.commit();
076        }
077      }
078    }