Problems about connection to a database

[berlindutza]

Hi!
I've imported a dynamic projects which connects to an old Cloudscape v5.1 database. It works fine, that means the different .jsp pages connect to the database and can work with it.
Now, I want to set up a new dynamic web project and work with the same database. I'm trying to set up a connection (through a datasource), but I always get an error!

Here's the code:
javax.naming.InitialContext ctx = new javax.naming.InitialContext();
ds = (javax.sql.DataSource)ctx.lookup("java:comp/env/" + datasourceRef);
con = ds.getConnection();

and the error I get:
Connection exception: Name "comp/env/ClipsAndTacks" not found in context "java:".
Exception thrown: null
java.lang.NullPointerException

I have to admit, that I don't understand anything from the first two rows of the code.
Can someone help/explain me?
I would really appreciate every answer!
Thanks a lot!

[FON]

You have to learn some basic JNDI
and find a way to configure your environment.

Here is how it is done with Tomcat :

The Tomcat 4 Servlet/JSP Container - JNDI Resources HOW-TO

i hope it will help

cheers!