Inject an EJB3 in a servlet

[gmichalk]

Hi,

if have a stateless session bean which works OK when injected in another session bean within the same container.

I have tried the same in a servlet:

public class MyServlet....

....
@EJB MyBean bean
public void doPost(....
{
Collection k = bean.getCollection();
}

The servlet always crashes on this very line. How can this be done ? After googeling, I have read that this was more of a tomcat issue. But it would be definitely nice ;-)

I also checked the TrailBlazer's DVD example, but could'nt find anything.

[guilherme_82]

Hi,
I do not have the solution to your problem, instead, I have another question.
I am trying to do that, but accessing the Session Bean from an Action of Struts which would be equivalent of accessing from a servlet. . I want know how do you instantiate your Bean. Don't you use JNDI? Or do you instantiate it with new... ?
when I use:

@Stateful
public class MyBean implements RemoteBean{
}

@Remote
public interface RemoteBean{
}

public class MyApp{

public void init(){
InitialContext context = new InitialContext();
String lookup = RemoteBean.class.getName();
RemoteBean bean = (RemoteBean) context.lookup(lookup);
bean.method();
}
}

when I execute the line bean.method I get the exception:

java.lang.NoSuchMethodError: org.jboss.aop.joinpoint.MethodInvocation.([Lorg/jboss/aop/advice/Interceptor;JLjava/lang/reflect/Method;Ljava/lang/reflect/Method;Lorg/jboss/aop/Advisor;)V

Do you what's wrong in my code?

Thanks, Guilherme

[andrigtmiller]

As far as I know you cannot use dependency injection in a servlet. In the init method of the servlet you stil have to do a JNDI lookup. Only the JNDI lookup doesn't have to use the URL of old, but can be as follows:

 private MyBean bean = null;

public void init(ServletConfig config) throws ServletException

 super.init(config);

 InitialContext context = null;

 try {
 context = new InitialContext();
 bean = (MyBean) context.lookup(MyBean.class.getName());
 } catch(Exception lookupError) {
 throw new ServletException(lookupError);
 }

This should fix your problem.