mysqlconnectionpooldatasource.java

网上销售系统是目前 Internet 上广泛使用的在线系统之一。 网上售书这是信息社会发展的必然要求。国际互联网的开通

/*
   Copyright (C) 2002 MySQL AB
   
      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
      (at your option) any later version.
   
      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
      
 */
package com.mysql.jdbc.jdbc2.optional;

import java.sql.Connection;
import java.sql.SQLException;

import javax.sql.ConnectionPoolDataSource;
import javax.sql.PooledConnection;


/**
 * This class is used to obtain a physical connection and instantiate and return  
 * a MysqlPooledConnection.  J2EE application servers map client calls to 
 * dataSource.getConnection to this class based upon mapping set within deployment 
 * descriptor.  This class extends MysqlDataSource.
 *
 * @see javax.sql.PooledConnection
 * @see javax.sql.ConnectionPoolDataSource
 * @see org.gjt.mm.mysql.MysqlDataSource
 * @author Todd Wolff <todd.wolff_at_prodigy.net>
 */
public class MysqlConnectionPoolDataSource
    extends MysqlDataSource
    implements ConnectionPoolDataSource {

    //~ Methods ...............................................................

    /**
     * Returns a pooled connection.
     *
     * @exception SQLException if an error occurs
     * @return a PooledConnection
     */
    public synchronized PooledConnection getPooledConnection()
                                                      throws SQLException {

        Connection connection = getConnection();
        MysqlPooledConnection mysqlPooledConnection = new MysqlPooledConnection(
                                                              connection);

        return mysqlPooledConnection;
    }

    /**
     * This method is invoked by the container.  Obtains physical connection using 
     * mySql.Driver class and returns a mysqlPooledConnection object.
     *
     * @param s user name
     * @param s1 password
     * @exception SQLException if an error occurs
     * @return a PooledConnection
     */
    public synchronized PooledConnection getPooledConnection(String s, 
                                                             String s1)
                                                      throws SQLException {

        Connection connection = getConnection(s, s1);
        MysqlPooledConnection mysqlPooledConnection = new MysqlPooledConnection(
                                                              connection);

        return mysqlPooledConnection;
    }
}