EJB reference in Servlet always null

[buki79]

Hi,


I use JBoss 4.2.2 on Mac OS with JDK 1.5.

First, I created a Session:

@Stateful(name="ViewerBean")
public class ViewerBean implements Viewer,
 ViewerLocal{

Then I want to call the bean from a servlet:

public class ViewerServlet extends HttpServlet {

 //inject EJB
 @EJB(mappedName="ViewerBean")
 private ViewerBean bean;

 private static final long serialVersionUID = 1L;


 /**
 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
 */
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 try {
 List events = bean.getEvents();
...

I haven't added anything to the ejb-jar.xml as the annotations should be sufficient. But everytime I want to call bean.getEvents() I get a NullPointerException.

I have an EJB3 project created in eclipse, as well as an EAR project. Both are deployed on the same server and the EAR client program references the EJB3 project, so I can use the ViewerBean in the client.

Is this correct? Could you give me any hints on what I'm actually missing?

Best regards,

Andreas

[alrubinger]

@EJB.mappedName is a vendor-specific (non-portable) attribute which in JBoss EJB3 is used to denote the JNDI target; you're using it as the target EJB name.

@EJB should be sufficient. Likewise you don't need to specify @Stateful.name (the default is the bean impl class getSimpleName()).

S,
ALR

[buki79]

Hi,

I tried it with "name" in the servlet, too. It didn't work either.

Best regards,

Andreas

[alrubinger]

web.xml version? Doesn't sound like injection is even getting setup; not a problem with target resolution.

[buki79]

Sorry, I forgot to mention.

They should be correct, as I use Version 2.5

web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">

application.xml (EAR):

<?xml version="1.0" encoding="ASCII"?>
<application xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:application="http://java.sun.com/xml/ns/javaee/application_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/application_5.xsd" version="5">

Best regards

[jaikiran]

"buki79" wrote:
Hi,


I use JBoss 4.2.2

Ah, so you use JBossAS-4.2.x. Injection of EJBs in servlets in this version isn't supported. See this sticky http://www.jboss.org/index.html?module=bb&op=viewtopic&t=107353

[buki79]

Ah, ok. Thanks alot!! I only read that JBoss 4.2 supports EJB3, so I thought injection works.