We have existing webservice project developed based on axis2 in tomcat 6.0.32 using top to bottom approach.
Now, we want to add asynchronous message processing features. So, exploring to use the JMS + MDB. To add this feature in tomcat, I am working to use the openEJB.
And, I was trying to find best way to add on this new project by adding openEJB.war to existing tomcat.
But, trying to simplify the steps to
how to add the MDBean project in addition to the existing top to bottom up axis2 webservice project?
How to deploy this new addition MDBean/openejb project.jar in to tomcat+openejb in Lunux?
How to deploy the openejb based MDB project.jar in to tomcat+openejb ?
How to send message object to MDBean which would also run in same tomcat having openejb.war?

I really thankfull for your kind response.
–
Subba

Can you try again with commenting out @PersistenceContext(unitName = “oe”)?

@Stateless
public class UserServiceBean implements UserService {
//@PersistenceContext(unitName = “oe”)
private EntityManager em;
……

For your information, you can use [code lang=”java”][/code] to put Java source code here.
[code lang=”java”]
some java code here
[/code]

@Local
public interface UserService {
public String show();
}

@Stateless
public class UserServiceBean implements UserService {
@PersistenceContext(unitName = “oe”)
private EntityManager em;
……

public class OeServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
@EJB
private UserService uss;
……
Simple code,but failed.Can you help me?

It seems the EntityManager injection has failed due to some problem in the DAO.
Since I don’t have your source code, can’t tell exactly what causes the problem. If it’s OK with you and if you want me to have a look, could you put your code of AbstractGenericDao and CommuneDaoImpl?

You can use [code lang=”java”]Put your code here[/code] to get the code syntax highlighted.

Regards,
Kevin

But i have a problem I get java.lang.IllegalStateException: EntityManager is not injected.
WARN – Injection: No such property ‘ejbtest.AbstractGenericDao/entityManager’ in class ejbtest.CommuneDaoImpl

Jeff

properties
property name=”hibernate.dialect” value=”org.hibernate.dialect.SQLServerDialect” /
/properties

Thanks again!

If you have an error like ‘Name MyServlet is not bound in this Context’, you normally need to check if the servlet is correctly set in the web.xml, the deployment descriptor.

Yet your case seems different. That error may also be caused by the failure in EJB injection if you use EJB. So the problem is not in the servlet yet in the EJB you try to inject in the servlet.

Let me explain with an example.

You have an EJB, named TestService and your servlet that is MyServlet has TestService as a member field.

So it would be like:
@EJB
private TestService testService;

When the application is deployed, the EJB container that is in this post, OpenEJB instantiates the TestService EJB then tries to inject it into the TestService field in the servlet. However, if the TestService EJB has any problem so OpenEJB fails to instantiate it then the TestService EJB cannot be injected into the member field in the servlet. So it also causes the problem in instantiation of the servlet. Thus after all, you can get that error message saying ‘Servlet is not bound in this Context’ yet the actual problem lies in the EJB. That’s why your servlet has no problem when you comment out the @EJB annotation. Although the servlet is fine without the @EJB annotation, as you said, you don’t have EJBs without it. Therefore you need to check your EJBs to solve the problem. If the EJBs injected in the servlet use other EJBs then you should make sure all the EJBs have no problems.

For instance, let’s assume that your stateless EJBs use a DAO which is also a stateless EJB and the DAO has the EntityManager field which is annotated with the @PersistenceContext annotation. When the application is deployed, the OpenEJB tries to inject the EntityManager object into the field. In this step, if your persistence.xml has any problems or any other problems occur, the OpenEJB fails to inject EntityManager in the DAO and therefore, the DAO cannot be instantiated which consecutively causes the failures in the EJB injections of other EJBs which use the DAO.

So as I already mentioned, you need to carefully check the EJBs.
I hope it might help you.

Regards,
Kevin

Thanks for a good “how-to”!
I have followed your instructions but when I try to go to the Servlet I get this error :
1) Error instantiating servlet class MyServlet
2) ‘Name MyServlet is not bound in this Context’

where MyServlet is like your TestServlet in current example…. I realy cant figure it out and would be very glad if anyone could point me in right direction.

Thanks in advance!

where is like your TestServlet in current example…. I realy cant figure it out and would be very glad if anyone could point me in right direction.

Thansk in advance!