Architecture J2EE

Question

Hi,
Im building a simple application and are planning on doing soo in J2EE (Im a complete newbie on the topic). Therefore Im doing some self-study. The application Im trying to build is the foolowing:
1. There are 2 objects, user and result. Where the User can have many results.
2. Through a JSP page the user can change their settings.
3. An application will run ones a day and search a database depening on the user settings and find result wich will be stored along with the user.
This is how Im building it:
1. Using eclipse J2EE plugin. Creating a Enterprise application containing web module (jsp), ejb module (using xdoclet to build ejb).
2. Exporting ear and deploying it on Jboss
3. MySQL with hibernate to store data
Now to my questions:
1. How should I use EJBs in concern of user-login and persist objects? What sort of EJB should be used when? Does anyone know of any good tutorials?
I have currently created one EJB (Stateless session bean), TestBean, which Im having trouble calling:
String s = "none";
try
TestLocalHome testLocalHome = (TestLocalHome)new InitialContext().lookup("Test");
TestLocal testBean = testLocalHome. create();
s = testBean.sum(10,10);
catch (Exception e)
s=e.toString();
The result on jboss is a list of the files and directories in my web-app ("Test" is the JNDI name in jboss.xml).
2. How can I build my app that will scan a database ones a day and make it run within JBoss? Does anyone know how the "client application module" in eclipse is used?
Any input is greatly appreciated!
Kind regards

Answer 1

You may want to look at Java EE 5/j2ee 1.4 samples which illustrate many types of ejbs and other resources.
http://java.sun.com/javaee/reference/code/
- sreeni