4.0 is a developer's release so you probably should not be using it yet.

-- Juha

I am a new bie to Jboss 4.0, but after spending come time and going thru documentation.. i got it worked.

Here are the steps:

1. Create the mysql-ds.xml file with the following config info.

<?xml version="1.0" encoding="UTF-8"?>

<local-tx-datasource>
<jndi-name>MySqlDS</jndi-name>
<connection-url>jdbc:mysql://localhost/db</connection-url>
<driver-class>org.gjt.mm.mysql.Driver</driver-class>
<min-pool-size>5</min-pool-size>
</local-tx-datasource>



2. Copy this file into the default/deploy directory of jboss.
3. Also get the latest version of Mysql JCA Conector from mysql.com. It is named 'mysql-connector-java-3.0.8-stable-bin.jar'.
4. Copy this file into deploy/lib directory.

Now you are ready to access the database. Here is the a small snippet to access database in some session bean.

Get the datasource.
Note: check the jndi name in the above configuration.

InitialContext ctx = new InitialContext();

//Load mysql datasource
ds = (DataSource) ctx.lookup("java:/MySqlDS");
System.out.println("Data source initialized.");

.
.
.

Access the database:
java.sql.Connection conn = ds.getConnection();

java.sql.Statement stmt = conn.createStatement();
String sql = "SELECT name FROM trail";
java.sql.ResultSet rs = stmt.executeQuery(sql);

while(rs.next())
data.addElement(rs.getString(1));

conn.close();





I hope that helps.

Naveen.