I've started to create the Shopping Cart and I made this so far:
ShoppingCartConfig.xml
<?xml version="1.0" encoding="ASCII"?>
<Config xsi:noNamespaceSchemaLocation="
http:///org.apache.tuscany.das.rdb/config.xsd"; xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance";>
<Command name="all carts" SQL="SELECT * FROM CART" kind="Select"/>
<Command name="all carts x items" SQL="SELECT * FROM CART_ITEM"
kind="Select"/>
<Command name="get cart item" SQL="SELECT * from CART_ITEM WHERE CART_ID
= ? AND ITEM_ID = ?" kind="Select"/>
<Command name="get cart items" SQL="SELECT * from CART_ITEM WHERE
CART_ID = ?" kind="Select"/>
<Command name="get items" SQL="select * FROM ITEM" kind="Select"/>
<Command name="get item" SQL="select * FROM ITEM WHERE ID = ?"
kind="Select"/>
<Command name="get cart" SQL="select * FROM CART WHERE ID = ?"
kind="Select"/>
<Table tableName="CART">
<Column columnName="ID" primaryKey="true" generated="true"/>
</Table>
</Config>
ShoppingCart.java
import commonj.sdo.DataObject;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Iterator;
import org.apache.tuscany.das.rdb.*;
public class ShoppingCart {
public void newCart() {
DAS das = DAS.FACTORY.createDAS
(getClass().getClassLoader().getResourceAsStream("ShoppingCartConfig.xml"),
getConnection());
Command command = das.getCommand("all carts");
DataObject allCarts = command.executeQuery();
DataObject newCart = allCarts.createDataObject("CART");
allCarts.getList("CART").add(newCart);
das.applyChanges(allCarts);
}
public void newItem() {
DAS das = DAS.FACTORY.createDAS
(getClass().getClassLoader().getResourceAsStream("ShoppingCartConfig.xml"),
getConnection());
Command command = das.getCommand("all items");
DataObject allItems = command.executeQuery();
DataObject newItem = allItems.createDataObject("ITEM");
allItems.getList("ITEM").add(newItem);
das.applyChanges(allItems);
}
public boolean confirmOrder(int cartId) {
DAS das = DAS.FACTORY.createDAS
(getClass().getClassLoader().getResourceAsStream("ShoppingCartConfig.xml"),
getConnection());
Command command = das.getCommand("get cart items");
DataObject cartItems = command.executeQuery();
ArrayList array = new ArrayList(cartItems.getList("CART_ITEM"));
// check if there are enough items in stock in case another cart,
that contains
// the same item, was ordered before
for (Iterator it = array.iterator(); it.hasNext();) {
DataObject cartXItem = (DataObject) it.next();
int quantity = cartXItem.getInt("QUANTITY");
int itemId = cartXItem.getInt("ITEM_ID");
command = das.getCommand("get item");
command.setParameter(1, new Integer(itemId));
DataObject item = command.executeQuery();
int units = item.getInt("UNITS");
if (quantity > units) {
return false;
}
item.setInt("UNITS", units - quantity);
}
command = das.getCommand("get cart");
command.setParameter(1, new Integer(cartId));
DataObject cart = command.executeQuery();
cart.getDataObject("CART[1]").setInt("CONFIRMED", 1);
das.applyChanges(cartItems);
return true;
}
public void addCartItem(int cartId, int itemId, int quantity) {
DAS das = DAS.FACTORY.createDAS
(getClass().getClassLoader().getResourceAsStream("ShoppingCartConfig.xml"),
getConnection());
Command command = das.getCommand("all carts x items");
DataObject allCartsXItems = command.executeQuery();
DataObject newCartXItem = allCartsXItems.createDataObject
("CART_ITEM");
newCartXItem.setInt("QUANTITY", quantity);
newCartXItem.setInt("CART_ID", cartId);
newCartXItem.setInt("ITEM_ID", itemId);
allCartsXItems.getList("CART_ITEM").add(newCartXItem);
das.applyChanges(allCartsXItems);
}
public void removeCartItem(int cartId, int itemId) {
DAS das = DAS.FACTORY.createDAS
(getClass().getClassLoader().getResourceAsStream("ShoppingCartConfig.xml"),
getConnection());
Command command = das.getCommand("all cart items");
command.setParameter(1, new Integer(cartId));
command.setParameter(2, new Integer(itemId));
DataObject cartItem = command.executeQuery();
cartItem.getDataObject("CART_ITEM[1]").delete();
das.applyChanges(cartItem);
}
private java.sql.Connection getConnection() {
try {
Class.forName("com.mysql.jdbc.Driver");
} catch(ClassNotFoundException e) {
e.printStackTrace();
return null;
}
try {
java.sql.Connection con = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/shoppingcart","tuscany","tuscany");
con.setAutoCommit(false);
return con;
} catch(SQLException e) {
e.printStackTrace();
return null;
}
}
}
TABLES:
CREATE TABLE CART (
ID INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
SUB_TOTAL DOUBLE,
TAX DOUBLE,
TOTAL DOUBLE,
CONFIRMED INTEGER
);
CREATE TABLE ITEM (
ID INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
DESCR CHAR(30),
UNITS INTEGER
);
CREATE TABLE CART_ITEM (
ID INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
CART_ID INTEGER,
ITEM_ID INTEGER,
QUANTITY INTEGER,
FOREIGN KEY (CART_ID) REFERENCES CART(ID),
FOREIGN KEY (ITEM_ID) REFERENCES ITEM(ID)
);
It is not complete, there is still missing some functionalities in the
ShoppingCart.java, the getters. I haven't tested all methods yet, but I'm
already posting it here in case anyone wanting to give some suggestion.
I have no idea how to make the ShoppingCart.jsp, I needing some ideas for
the layout.
Adriano Crestani
On 11/16/06, Willian Maja <[EMAIL PROTECTED]> wrote:
I think I didn't understand what you want. But i tested using TimeStamp
and
DateTime:
CREATE TABLE test (ID integer not null AUTO_INCREMENT, timestamp
timestamp, datetime datetime, primary key (ID));
INSERT INTO test VALUES ();
This will create the following row:
| 1 | 2006-11-16 14:10:24.0 | NULL
Now I will read the timestamp:
Command read = das.createCommand("select * from test");
DataObject root = read.executeQuery();
DataObject node = root.getDataObject("test[1]");
java.util.Date date = node.getDate("timestamp"); // You must use
java.util.Date, not java.sql.Date
System.out.println(date.getHours()); // Print the hours
System.out.println(date.getMonth()); // Print the month
System.out.println(node.getDate("date")); // Print the TimeStamp
ex:2006-11-16 14:12:23.0
To save DateTime I used the following code:
//Continuing the last code, I'm going to save the TimeStamp in
the
DateTime column
node.setDate("datetime", date);
das.applyChanges(root);
Now the row 1 from the test table will be:
| 1 | 2006-11-16 14:10:24.0 | 2006-11-16 14:10:24.0
I read/updated the row with datetime and timestamp column.
If this wasn't what you want, please send me the code you want to make
work
with SDO/Mysql.
>From: "Katja" <[EMAIL PROTECTED]>
>Reply-To: [email protected]
>To: [email protected]
>Subject: Re: New proposal to make DAS/SDO HOW TO
>Date: Thu, 16 Nov 2006 17:29:58 +0100
>
>Hi Willian!
>
>Thank you for the example! You tested with a Date-Column, that worked in
my
>application, too, because no conversion between the column and the data
>object value is necessary.
>
>With DateTime a converter is needed:
>SDO format: 2006-11-16T17:22
>MySQL format: 2006-11-16 17:22
>
>The bigbank sample has a DateConverter for this issue, but this does only
>work with Derby and not with MySQL. I don't know why. I posted the error
>last time:
>http://www.mail-archive.com/[email protected]/msg10725.html
>
>It would be great, if you could test again with a DateTime or Timestamp
>column and tell me your solution.
>
>Thanks,
>Katja
>
>
>
>-------- Original-Nachricht --------
>Datum: Thu, 16 Nov 2006 16:08:48 +0000
>Von: "Willian Maja" <[EMAIL PROTECTED]>
>An: [email protected]
>Betreff: Re: New proposal to make DAS/SDO HOW TO
>
> > Hi Katja,
> >
> > I've just tested to read Date column, and it works. I'm going to
>paste
> > my code here for you:
> >
> > This will be the test table, it's just a simple table with a DateTime
> > Column.
> >
> > CREATE TABLE test (ID integer not null AUTO_INCREMENT, date_column
>date);
> > INSERT INTO test (date_column) VALUES ("06-11-16");
> >
> > Now you should create your Das connection. In my code example I'll not
>use
> > XML configuration. I'm going to create the Command:
> >
> > Command read = das.createCommand("select * from test");
//Create
> > the
> > Command
> > DataObject root = read.executeQuery();
> > DataObject row = root.getDataObject("teste[1]"); // Get the
>first
> > row from test table;
> > System.out.println(row.getDate("date_column")); // Print the
> > DateTime
> >
> >
> > I think this will help you :).
> >
> > Bye.
> >
> >
> >
> >
> > >From: "Katja" <[EMAIL PROTECTED]>
> > >Reply-To: [email protected]
> > >To: [email protected]
> > >Subject: Re: New proposal to make DAS/SDO HOW TO
> > >Date: Thu, 16 Nov 2006 09:14:28 +0100
> > >
> > >Hi!
> > >
> > >Is it possible to add a Timestamp or DateTime column to the database?
I
> > am
> > >very interested in how to access these columns with DAS and MySQL
>because
> > I
> > >have not succeeded in doing this.
> > >
> > >Thanks,
> > >Katja
> > >
> > >-------- Original-Nachricht --------
> > >Datum: Thu, 16 Nov 2006 03:44:18 -0400
> > >Von: "Adriano Crestani" <[EMAIL PROTECTED]>
> > >An: [email protected]
> > >Betreff: Re: New proposal to make DAS/SDO HOW TO
> > >
> > > > Willian, I created these tables, that will possible be used in the
> > > > shopping
> > > > cart app. It's simple, but I think a howto sample must be simple.
>And
> > if
> > > > you
> > > > want to add anything, feel free ; )
> > > >
> > > > CREATE TABLE CART (
> > > > ID INTEGER,
> > > > PRIMARY KEY (ID)
> > > > );
> > > >
> > > > CREATE TABLE ITEM (
> > > > ID INTEGER,
> > > > ITEM VARCHAR(30),
> > > > UNITS INTEGER,
> > > > CART_ID INTEGER,
> > > > PRIMARY KEY (ID),
> > > > FOREIGN KEY (CART_ID) REFERENCES CART(ID)
> > > > );
> > > >
> > > >
> > > >
> > > > On 11/16/06, Luciano Resende <[EMAIL PROTECTED]> wrote:
> > > > >
> > > > > Hey Guys
> > > > >
> > > > > Very good to see some progress and some contents being
>generated.
> > I
> > > > > agree
> > > > > with you guys when you say this is becoming more like a user
>guide,
> > > > > instead
> > > > > of a How To, and building it describing a new scenario would
> > probably
> > > > make
> > > > > things more clear, altough let's try to keep it simple on the
> > >beginning,
> > > > > otherwise we are going to get a White paper :)
> > > > >
> > > > > I think we should describe actions that you would take when
> > trying
> > >to
> > > > > create an application and describe how you would do it (e.g Now
we
> > >need
> > > > to
> > > > > execute a query to read the list of products, and this is how
you
> > >would
> > > > do
> > > > > using DAS), and point the user to further documentation in case
it
> > > > > needs/want to know more about the specific feature (e.g if they
>want
> > >to
> > > > > learn the whole syntax/xsd of the das config file).
> > > > >
> > > > > I think couple things should not be covered on the How to :
> > > > > - How to build a war file
> > > > > - How to create a database (altough you might provide the
>SQL
> > > > > statements to create the tables you would use or at least
describe
> > the
> > > > DB
> > > > > schema)
> > > > >
> > > > > Now, talking about what should be in this how-to
> > > > > - We could start very simple... 1 product table, and one
> > simple
> > > > jsp
> > > > > that gives you a list of the products available
> > > > > - Using MySQL is good, altough this how to should not
really
> > be
> > > > > database dependent, right ? we could point it to any database,
and
> > you
> > > > > guys
> > > > > could maybe elaborate on what change would be necessary to do
this
> > :)
> > > > >
> > > > > Also, I think this how to does not necessarily need to
produce
>a
> > > > > working
> > > > > application, as it's intended to show how people would use DAS.
If
> > we
> > > > want
> > > > > to spend time creating an application, I'd suggest doing this as
> > >another
> > > > > task, and finish the one I have started as part of
> > > > > http://issues.apache.org/jira/browse/TUSCANY-800
> > > > >
> > > > > Let me know if you have any further questions... let's continue
to
> > > > > updating
> > > > > the wiki, and please let me know when you guys want me to take a
> > look
> > > > and
> > > > > provide a feedback on the contents...
> > > > >
> > > > > BTW, others are welcome to voice their opinion on what direction
>we
> > > > should
> > > > > take here...
> > > > >
> > > > >
> > > > > - Luciano Resende
> > > > > Apache Tuscany
> > > > >
> > > > >
> > > > > On 11/15/06, Adriano Crestani <[EMAIL PROTECTED]> wrote:
> > > > > >
> > > > > > I've decribed the XML configuration file, but it's still
looking
> > >like
> > > > a
> > > > > > user
> > > > > > guide than a howto. I think the CompanyWeb sample is to simple
>and
> > > > > doesn't
> > > > > > cover well all the DAS features. So lets make this Shopping
Cart
> > > > > > application
> > > > > > trying to use all the DAS features. Then we will be able to do
a
> > >very
> > > > > > useful
> > > > > > howto.
> > > > > >
> > > > > > My propose is that this app must have at least:
> > > > > >
> > > > > > - 1 functionality that requires a SQL command with
>arguments.
> > > > Then
> > > > > we
> > > > > > cover how to deal with arguments in SQL commands.
> > > > > >
> > > > > > - 1 table that has one autoincrement key column to cover
the
> > > > > > "genarated"
> > > > > > attribute on the howto.
> > > > > >
> > > > > > - 1 table that requires a concurrency control to cover the
> > > > > > "concurrency"
> > > > > > attribute on the howto.
> > > > > >
> > > > > > - 1 table containing a foreign key to cover how to explicit
>in
> > >the
> > > > > XML
> > > > > > configuration file the link between two tables. There will
> > probabily
> > > > be
> > > > > a
> > > > > > foreign key in its database anyway. ; )
> > > > > >
> > > > > > I think also a good idea to use the MySql as the database
>server,
> > >once
> > > > > > it's
> > > > > > the most used server on webapps ; )
> > > > > >
> > > > > > We must discuss how will be the Shopping Cart GUI, it must be
> > simple
> > > > > once
> > > > > > it's not the focus of our howto. I think a simple html
genarated
> > by
> > >a
> > > > > jsp
> > > > > > is
> > > > > > enough. ; )
> > > > > >
> > > > > > Adriano Crestani
> > > > > >
> > > > > > On 11/15/06, Willian Yabusame Maja <[EMAIL PROTECTED]>
> > wrote:
> > > > > > >
> > > > > > > Hello Tuscany Community!
> > > > > > >
> > > > > > > Adriano Crestani and I are working together on a
>HelloWorld
> > >DAS
> > > > > "How
> > > > > > > To". I have uploaded what we have done so far to
> > > > > > >
> > > > > >
> > > > >
> > > >
> >
> >
http://wiki.apache.org/ws/Tuscany/TuscanyJava/DAS_Java_Overview/RDBDAS_HOWTO_HelloDASApp
> > > > > > >
> > > > > > > We were using the CompanyWeb sample application to make
>this
> > > > > > > step-by-step how-to and teach how to use the DAS/SDO
Features.
> > We
> > > > are
> > > > > > not
> > > > > > > liking what this is becoming, as it's looking more like a
> > > > > > user-gide/readme
> > > > > > > then really a how-to, so we would like to do a new proposal
:
> > > > > > >
> > > > > > > Use the scenario of a Shopping cart, and use it to
explain
> > >more
> > > > > > about
> > > > > > > how to build it using DAS to handle the persistence part of
>the
> > > > app...
> > > > > > >
> > > > > > > The topics would be:
> > > > > > > Introducing the scenario and the motivation to use
> > DAS/SDO
> > > > > > > Initial Setup and environment assumptions
> > > > > > > Building the application
> > > > > > > - database
> > > > > > > - DAS commands
> > > > > > > - Configuring the XML and how to make the
> > commands
> > > > > > > Explain the DAS/SDO and how to read/get results
> > > > > > > conclusion
> > > > > > >
> > > > > > >
> > > > > > > Before we change our path to this new approach, we would
> > like
> > >to
> > > > > > hear
> > > > > > > some feedback on what you guys think about this new
>approach....
> > > > > > >
> > > > > > > Willian Yabusame Maja
> > > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > >
> > >
> > >--
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