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TimezoneDump.java

/*
 Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved.
 

  The MySQL Connector/J is licensed under the terms of the GPLv2
  <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
  There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
  this software, see the FLOSS License Exception
  <http://www.mysql.com/about/legal/licensing/foss-exception.html>.

  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; version 2
  of the License.

  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., 51 Franklin St, Fifth
  Floor, Boston, MA 02110-1301  USA



 */
package com.mysql.jdbc.util;

import java.sql.DriverManager;
import java.sql.ResultSet;

import com.mysql.jdbc.TimeUtil;

/**
 * Dumps the timezone of the MySQL server represented by the JDBC url given on
 * the commandline (or localhost/test if none provided).
 * 
 * @author Mark Matthews
 */
00039 public class TimezoneDump {
      // ~ Static fields/initializers
      // ---------------------------------------------

      private static final String DEFAULT_URL = "jdbc:mysql:///test";

      // ~ Constructors
      // -----------------------------------------------------------

      /**
       * Constructor for TimezoneDump.
       */
00051       public TimezoneDump() {
            super();
      }

      // ~ Methods
      // ----------------------------------------------------------------

      /**
       * Entry point for program when called from the command line.
       * 
       * @param args
       *            command-line args. Arg 1 is JDBC URL.
       * @throws Exception
       *             if any errors occur
       */
00066       public static void main(String[] args) throws Exception {
            String jdbcUrl = DEFAULT_URL;

            if ((args.length == 1) && (args[0] != null)) {
                  jdbcUrl = args[0];
            }

            Class.forName("com.mysql.jdbc.Driver").newInstance();

            ResultSet rs = null;
            
            try {
                  rs = DriverManager.getConnection(jdbcUrl).createStatement().executeQuery("SHOW VARIABLES LIKE 'timezone'");

                  while (rs.next()) {
                        String timezoneFromServer = rs.getString(2);
                        System.out.println("MySQL timezone name: " + timezoneFromServer);
      
                        String canonicalTimezone = TimeUtil
                                    .getCanoncialTimezone(timezoneFromServer, null);
                        System.out.println("Java timezone name: " + canonicalTimezone);
                  }
            } finally {
                  if (rs != null) {
                        rs.close();
                  }
            }
      }
}

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