[jboss-user] [EJB 3.0] - Re: How to get this (very simple) tutorial to work in JBoss

[Hellek]

I also found this (yesterday already) http://forum.java.sun.com/thread.jspa?threadID=5162297&tstart=60
but I just don't understand it.

They all have interfaces etc. and in the tutorial I tried to follow, they don't have such things at all.

In the tutorial they have:
1.) An EJB-Project with the persistence.xml and a Bean. The bean is just a "copy" of an existing table with getters and setters for all columns and the @Entity and @Id Annotations.
My persistence.xml looks like this:
<?xml version="1.0" encoding="UTF-8"?>
  | <persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
  | 	<persistence-unit name="EJBProject1">
  | 		<provider>org.hibernate.ejb.HibernatePersistence</provider>
  |     	<jta-data-source>java:/TestDS</jta-data-source>
  | 		<class>com.Benutzer</class>
  | 		<properties>
  | 		  <property name="hibernate.dialect"
  | 				value="org.hibernate.dialect.MySQLDialect" />
  | 		  <property name="hibernate.transaction.manager_lookup_class" 
  |             value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
  | 		  <property name="hibernate.hbm2ddl.auto" value="update"/>
  | 		</properties>
  | 	</persistence-unit>
  | </persistence>

The datasource works fine, i.e. hibernate succesfully updates the table if I mess it up.

2.) A WebProject
With a servlet which looks like this:

  | public class Servlet1 extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
  | 
  | public Servlet1() {
  | 		super();
  | }
  | 
  | @PersistenceUnit(name="EJBProject1")
  | EntityManagerFactory emf;
  | 
  | /* (non-Java-doc)
  | * @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
  | */
  | protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  | response.setContentType("text/html"); 
  | response.setHeader("Pragma", "No-cache");
  | response.setDateHeader("Expires", 0);
  | response.setHeader("Cache-Control", "no-cache");
  | 
  | List users = emf.createEntityManager().createQuery("select b from Benutzer b").getResultList();
  | PrintWriter writer = response.getWriter();
  | 
  | for (Iterator iterator = users.iterator(); iterator.hasNext();) {
  | 			 Benutzer benutzer = (Benutzer) iterator.next();
  | 			 writer.print(benutzer.getName());
  | 		 }
  | 		 writer.flush();
  | writer.flush();
  | } 
  | }
  | 

and a plain normal web.xml that just maps Servlet1 to an url

3.) Those 2 projects are then combined into an EARProject. Result is a .EAR-File with a jar for the Bean and a war for the webproject inside and the following application.xml
<?xml version="1.0" encoding="UTF-8"?>
  | <application id="Application_ID" version="5.0" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/application_5_0.xsd">
  | 	<display-name>
  | 	EARProject1</display-name>
  | 	<module>
  | 		<web>
  | 			<web-uri>WebProject2.war</web-uri>
  | 			<context-root>WebProject2</context-root>
  | 		</web>
  | 	</module>
  | 	<module>
  | 		<ejb>EJBProject1.jar</ejb>
  | 	</module>
  | </application>

All 3 projects have a MANIFEST.MF that just says

  | Manifest-Version: 1.0
  | Class-Path: 
  | 

I hope this illustrates the content very well, unfortunately I don't understand how to apply what people say in those topics about JNDI etc. onto this structure.

It would really be great if somebody could tell me how to do it.

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