001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.verify;
016    
017    import com.liferay.portal.kernel.dao.jdbc.DataAccess;
018    import com.liferay.portal.kernel.util.StringBundler;
019    
020    import java.sql.Connection;
021    import java.sql.PreparedStatement;
022    
023    /**
024     * @author Alberto Chaparro
025     */
026    public class VerifyRatings extends VerifyProcess {
027    
028            @Override
029            protected void doVerify() throws Exception {
030                    normalizeRatingStats();
031            }
032    
033            protected void normalizeRatingStats() throws Exception {
034                    Connection con = null;
035                    PreparedStatement ps = null;
036    
037                    try {
038                            con = DataAccess.getUpgradeOptimizedConnection();
039    
040                            StringBundler sb = new StringBundler(6);
041    
042                            sb.append("update RatingsStats set ");
043                            sb.append(_SQL_UPDATE_AVERAGE_SCORE);
044                            sb.append(", ");
045                            sb.append(_SQL_UPDATE_TOTAL_ENTRIES);
046                            sb.append(", ");
047                            sb.append(_SQL_UPDATE_TOTAL_SCORE);
048    
049                            ps = con.prepareStatement(sb.toString());
050    
051                            ps.executeUpdate();
052                    }
053                    finally {
054                            DataAccess.cleanUp(con, ps);
055                    }
056            }
057    
058            private static final String _SQL_FROM_WHERE_CLAUSE =
059                    "from RatingsEntry where RatingsStats.classPK = RatingsEntry.classPK " +
060                            "and RatingsStats.classNameId = RatingsEntry.classNameId " +
061                                    "group by classNameId, classPK";
062    
063            private static final String _SQL_UPDATE_AVERAGE_SCORE =
064                    "averageScore = coalesce((select sum(RatingsEntry.score) / count(1) " +
065                            _SQL_FROM_WHERE_CLAUSE + "), 0)";
066    
067            private static final String _SQL_UPDATE_TOTAL_ENTRIES =
068                    "totalEntries = coalesce((select count(1) " +
069                            _SQL_FROM_WHERE_CLAUSE + "), 0)";
070    
071            private static final String _SQL_UPDATE_TOTAL_SCORE =
072                    "totalScore = coalesce((select sum(RatingsEntry.score) " +
073                            _SQL_FROM_WHERE_CLAUSE + "), 0)";
074    
075    }