TransactionPairs.java Source code

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Here is the source code for TransactionPairs.java

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/*
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class TransactionPairs {

    public static void main(String args[]) {

        String url = "jdbc:mySubprotocol:myDataSource";
        Connection con = null;
        Statement stmt;
        PreparedStatement updateSales;
        PreparedStatement updateTotal;
        String updateString = "update COFFEES " + "set SALES = ? where COF_NAME like ?";

        String updateStatement = "update COFFEES " + "set TOTAL = TOTAL + ? where COF_NAME like ?";
        String query = "select COF_NAME, SALES, TOTAL from COFFEES";

        try {
            Class.forName("myDriver.ClassName");

        } catch (java.lang.ClassNotFoundException e) {
            System.err.print("ClassNotFoundException: ");
            System.err.println(e.getMessage());
        }

        try {

            con = DriverManager.getConnection(url, "myLogin", "myPassword");

            updateSales = con.prepareStatement(updateString);
            updateTotal = con.prepareStatement(updateStatement);
            int[] salesForWeek = { 175, 150, 60, 155, 90 };
            String[] coffees = { "Colombian", "French_Roast", "Espresso", "Colombian_Decaf", "French_Roast_Decaf" };
            int len = coffees.length;
            con.setAutoCommit(false);
            for (int i = 0; i < len; i++) {
                updateSales.setInt(1, salesForWeek[i]);
                updateSales.setString(2, coffees[i]);
                updateSales.executeUpdate();

                updateTotal.setInt(1, salesForWeek[i]);
                updateTotal.setString(2, coffees[i]);
                updateTotal.executeUpdate();
                con.commit();
            }

            con.setAutoCommit(true);

            updateSales.close();
            updateTotal.close();

            stmt = con.createStatement();
            ResultSet rs = stmt.executeQuery(query);

            while (rs.next()) {
                String c = rs.getString("COF_NAME");
                int s = rs.getInt("SALES");
                int t = rs.getInt("TOTAL");
                System.out.println(c + "     " + s + "    " + t);
            }

            stmt.close();
            con.close();

        } catch (SQLException ex) {
            System.err.println("SQLException: " + ex.getMessage());
            if (con != null) {
                try {
                    System.err.print("Transaction is being ");
                    System.err.println("rolled back");
                    con.rollback();
                } catch (SQLException excep) {
                    System.err.print("SQLException: ");
                    System.err.println(excep.getMessage());
                }
            }
        }
    }
}