ca.qc.adinfo.rouge.leaderboard.db.LeaderboardDb.java Source code

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Here is the source code for ca.qc.adinfo.rouge.leaderboard.db.LeaderboardDb.java

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/*
 * Copyright [2011] [ADInfo, Alexandre Denault]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package ca.qc.adinfo.rouge.leaderboard.db;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashMap;

import org.apache.commons.dbutils.DbUtils;
import org.apache.log4j.Logger;

import ca.qc.adinfo.rouge.leaderboard.Leaderboard;
import ca.qc.adinfo.rouge.leaderboard.Score;
import ca.qc.adinfo.rouge.server.DBManager;

public class LeaderboardDb {

    private static Logger log = Logger.getLogger(LeaderboardDb.class);

    public static boolean createLeaderboard(DBManager dbManager, String key, String name) {

        Connection connection = null;
        PreparedStatement stmt = null;
        ResultSet rs = null;
        String sql = null;

        sql = "INSERT INTO rouge_leaderboards (`key`, `name`) VALUES (?, ?);";

        try {
            connection = dbManager.getConnection();
            stmt = connection.prepareStatement(sql);

            stmt.setString(1, key);
            stmt.setString(2, name);

            int ret = stmt.executeUpdate();

            return (ret > 0);

        } catch (SQLException e) {
            log.error(stmt);
            log.error(e);
            return false;

        } finally {

            DbUtils.closeQuietly(rs);
            DbUtils.closeQuietly(stmt);
            DbUtils.closeQuietly(connection);
        }
    }

    public static boolean submitScore(DBManager dbManager, String key, long userId, long score) {

        Connection connection = null;
        PreparedStatement stmt = null;
        ResultSet rs = null;
        String sql = null;

        sql = "INSERT INTO rouge_leaderboard_score (`leaderboard_key`, `user_id`, `score`) "
                + "VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE score = GREATEST(?, score);";

        try {
            connection = dbManager.getConnection();
            stmt = connection.prepareStatement(sql);

            stmt.setString(1, key);
            stmt.setLong(2, userId);
            stmt.setLong(3, score);
            stmt.setLong(4, score);

            int ret = stmt.executeUpdate();

            return (ret > 0);

        } catch (SQLException e) {
            log.error(stmt);
            log.error(e);
            return false;

        } finally {

            DbUtils.closeQuietly(rs);
            DbUtils.closeQuietly(stmt);
            DbUtils.closeQuietly(connection);
        }
    }

    public static Leaderboard getLeaderboard(DBManager dbManager, String key) {

        Connection connection = null;
        PreparedStatement stmt = null;
        ResultSet rs = null;

        String sql = "SELECT score, user_id FROM rouge_leaderboard_score "
                + "WHERE `leaderboard_key` = ? ORDER BY `score` DESC LIMIT 5;";

        try {
            connection = dbManager.getConnection();
            stmt = connection.prepareStatement(sql);

            stmt.setString(1, key);

            Leaderboard leaderboard = new Leaderboard(key);

            rs = stmt.executeQuery();

            while (rs.next()) {
                Score score = new Score(rs.getLong("user_id"), rs.getLong("score"));
                leaderboard.addScore(score);
            }

            return leaderboard;

        } catch (SQLException e) {
            log.error(stmt);
            log.error(e);
            return null;

        } finally {

            DbUtils.closeQuietly(rs);
            DbUtils.closeQuietly(stmt);
            DbUtils.closeQuietly(connection);
        }
    }

    public static HashMap<String, Leaderboard> getLeaderboards(DBManager dbManager) {

        Connection connection = null;
        PreparedStatement stmt = null;
        ResultSet rs = null;
        HashMap<String, Leaderboard> returnValue = new HashMap<String, Leaderboard>();

        String sql = "SELECT `key` FROM rouge_leaderboards;";

        try {
            connection = dbManager.getConnection();
            stmt = connection.prepareStatement(sql);

            rs = stmt.executeQuery();

            while (rs.next()) {

                String key = rs.getString("key");
                Leaderboard leaderboard = getLeaderboard(dbManager, key);

                if (leaderboard == null) {
                    returnValue.put(key, new Leaderboard(key));
                } else {
                    returnValue.put(key, leaderboard);
                }
            }

            return returnValue;

        } catch (SQLException e) {
            log.error(stmt);
            log.error(e);
            return null;

        } finally {

            DbUtils.closeQuietly(rs);
            DbUtils.closeQuietly(stmt);
            DbUtils.closeQuietly(connection);
        }
    }

}