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.PreparedStatement;
021    
022    /**
023     * @author Alberto Chaparro
024     */
025    public class VerifyRatings extends VerifyProcess {
026    
027            @Override
028            protected void doVerify() throws Exception {
029                    normalizeRatingStats();
030            }
031    
032            protected void normalizeRatingStats() throws Exception {
033                    PreparedStatement ps = null;
034    
035                    try {
036                            StringBundler sb = new StringBundler(6);
037    
038                            sb.append("update RatingsStats set ");
039                            sb.append(_SQL_UPDATE_AVERAGE_SCORE);
040                            sb.append(", ");
041                            sb.append(_SQL_UPDATE_TOTAL_ENTRIES);
042                            sb.append(", ");
043                            sb.append(_SQL_UPDATE_TOTAL_SCORE);
044    
045                            ps = connection.prepareStatement(sb.toString());
046    
047                            ps.executeUpdate();
048                    }
049                    finally {
050                            DataAccess.cleanUp(ps);
051                    }
052            }
053    
054            private static final String _SQL_FROM_WHERE_CLAUSE =
055                    "from RatingsEntry where RatingsStats.classPK = RatingsEntry.classPK " +
056                            "and RatingsStats.classNameId = RatingsEntry.classNameId " +
057                                    "group by classNameId, classPK";
058    
059            private static final String _SQL_UPDATE_AVERAGE_SCORE =
060                    "averageScore = coalesce((select sum(RatingsEntry.score) / count(1) " +
061                            _SQL_FROM_WHERE_CLAUSE + "), 0)";
062    
063            private static final String _SQL_UPDATE_TOTAL_ENTRIES =
064                    "totalEntries = coalesce((select count(1) " +
065                            _SQL_FROM_WHERE_CLAUSE + "), 0)";
066    
067            private static final String _SQL_UPDATE_TOTAL_SCORE =
068                    "totalScore = coalesce((select sum(RatingsEntry.score) " +
069                            _SQL_FROM_WHERE_CLAUSE + "), 0)";
070    
071    }