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.plugins.dbcleaner.purges;
021    
022    import org.sonar.api.batch.Event;
023    import org.sonar.api.database.DatabaseSession;
024    import org.sonar.api.database.model.ResourceModel;
025    import org.sonar.plugins.dbcleaner.api.Purge;
026    import org.sonar.plugins.dbcleaner.api.PurgeContext;
027    import org.sonar.plugins.dbcleaner.api.PurgeUtils;
028    
029    import javax.persistence.Query;
030    import java.util.List;
031    
032    public final class PurgeEventOrphans extends Purge {
033    
034      public PurgeEventOrphans(DatabaseSession session) {
035        super(session);
036      }
037    
038      public void purge(PurgeContext context) {
039        String selectEventsSql = "SELECT e.id FROM " + Event.class.getSimpleName() + " e WHERE (";
040        selectEventsSql += "e.resourceId IS NOT NULL AND NOT EXISTS(FROM " + ResourceModel.class.getSimpleName()
041            + " r WHERE r.id=e.resourceId)";
042        selectEventsSql += ") OR (";
043        selectEventsSql += "e.snapshot IS NULL";
044        selectEventsSql += ")";
045    
046        Query query = getSession().createQuery(selectEventsSql);
047        final List<Integer> eventIds = query.getResultList();
048        PurgeUtils.executeQuery(getSession(), "", eventIds, "DELETE FROM " + Event.class.getSimpleName() + " WHERE id in (:ids)");
049      }
050    }