dboptions.java

java servlet著名论坛源代码

/*
 * $Header: /cvsroot/mvnforum/myvietnam/src/net/myvietnam/mvncore/db/DBOptions.java,v 1.22 2004/01/18 19:06:43 minhnn Exp $
 * $Author: minhnn $
 * $Revision: 1.22 $
 * $Date: 2004/01/18 19:06:43 $
 *
 * ====================================================================
 *
 * Copyright (C) 2002-2004 by MyVietnam.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * All copyright notices regarding MyVietnam and MyVietnam CoreLib
 * MUST remain intact in the scripts and source code.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Correspondence and Marketing Questions can be sent to:
 * [e-mail]
 *
 * @author: Minh Nguyen  [e-mail]
 * @author: Mai  Nguyen  [e-mail]
 */
package net.myvietnam.mvncore.db;

import java.io.File;

import net.myvietnam.mvncore.configuration.DOM4JConfiguration;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import net.myvietnam.mvncore.util.FileUtil;

class DBOptions {

    private static Log log = LogFactory.getLog(DBOptions.class);

    private static final String OPTION_FILE_NAME = "mvncore.xml";

    //default values
    boolean useDatasource   = false;
    // MUST NOT refer to DBUtils, or we will get an infinite recurse
    int databaseType        = 0; //DATABASE_UNKNOWN

    // if useDatasource = true
    String datasourceName   = "";

    // if useDatasource = false
    String driverClassName  = "org.gjt.mm.mysql.Driver";
    String databaseURL      = "jdbc:mysql://localhost/mvnforum?useUnicode=true&characterEncoding=utf-8";
    String databaseUser     = "root";
    String databasePassword = "";
    int maxConnection       = 20;
    int maxTimeToWait       = 2000;// 2 seconds
    int minutesBetweenRefresh = 30;// 30 minutes

    DBOptions() {
        try {
            String strPathName = FileUtil.getServletClassesPath();
            String configFilename = strPathName + OPTION_FILE_NAME;
            DOM4JConfiguration conf = new DOM4JConfiguration(new File(configFilename));


            useDatasource = conf.getBoolean("dboptions.use_datasource", false);
            databaseType = conf.getInt("dboptions.database_type", 0);

            if (useDatasource) {
                datasourceName = conf.getString("dboptions.datasource_name");
            } else {
                driverClassName = conf.getString("dboptions.driver_class_name", driverClassName);
                databaseURL = conf.getString("dboptions.database_url", databaseURL);
                databaseUser = conf.getString("dboptions.database_user", databaseUser);
                databasePassword = conf.getString("dboptions.database_password",databasePassword);

                maxConnection = conf.getInt("dboptions.max_connection", maxConnection);
                maxTimeToWait = conf.getInt("dboptions.max_time_to_wait", maxTimeToWait);

                minutesBetweenRefresh = conf.getInt("dboptions.minutes_between_refresh", minutesBetweenRefresh);
                if (minutesBetweenRefresh < 1) {
                    minutesBetweenRefresh = 1; //min is 1 minute
                }
            }
        } catch (Exception e) {
            String message = "net.myvietnam.mvncore.db.DBOptions: Can't read the configuration file: '" + OPTION_FILE_NAME + "'. Make sure the file is in your CLASSPATH";
            log.error(message, e);
        }
    } //constructor
}