Develop Reference

JNDI #Resource annotation

In servlet and filter classes i can initialize DataSource variable via annotation
#Resource(name = "jdbc/testDB")
protected DataSource ds;
But how it initialize in basic class via annotation?
Usually thorows NullPointerException
public class AddAuto {
#Resource(name = "jdbc/testDB")
private DataSource ds;
}

What is your container?
If it's tomcat, the resource name should be something like this
#Resource(name = "java:/comp/env/jdbc/testDB")
protected DataSource ds;
I don't know about the other container, but JBoss would be same as Tomcat, and GlassFish as your value.
Also I suggest old lookup which help you so much for debugging
void init(){
DataSource ds=(DataSource)InitialContext.doLookup("java:/comp/env/jdbc/testDB");
}

Container inspects annotation only inside well-known componets like servlets, filters. You should transform your class to some component:
Web component (servlet, filters, web container listeners)
EJB (not supported by tomcat)
CDI beans
Or you can use non Java EE solution like spring

How come injection #Resource works outside the container?

I'm testing webservices in Java SE, and I see that #Resource does work, wasn't this true only within a Container ? or with CDI ? why does it work in SE also !?
#WebService
public class Teams {
#Resource
private WebServiceContext context;
}
I'm publishing using Endpoint.publish("http://localhost:9876/teams", new Teams());

Not true. Container will inject the instance of the resource on any EJB component.
http://docs.oracle.com/javaee/5/api/javax/annotation/Resource.html

Inject EJB 3.0 in WebLogic Server v10.3

I am having some issues trying to inject a stateless EJB into an Application Client Project. Both the App Client and the EJB are in the same EAR. Using JNDI, I am able to retrieve an instance of the EJB, but I'm not sure how should I do it with the #EJB annotation. I've tried using #EJB(name="something"), #EJB(mappedName="something"), but all I get is a null. Here is my code:
#Remote
public interface TimerEjbTestService {
public void testMethod();
}
#Stateless(mappedName="TimerEjbTestService")
public class TimerEjbTestBean implements TimerEjbTestService{
public void testMethod() {
System.out.println("Inside EJB.");
}
}
With JNDI I'm able to get the instance as follows:
Context ctx = new InitialContext();
TimerEjbTestService timerEjbTestService = (TimerEjbTestService) ctx.lookup("TimerEjbTestService#myejb.timerejbtestservice.services.TimerEjbTestService");
Any ideas on how can I do this?

You can do something like this:
#EJB
private TimerEjbTestService myBean;
In this way, the container injects the bean.
Also, since it is in the same ear (thus ran by the same JVM) the annotation for the interface should be #Local not #Remote.

How to access stateful session bean through remote interface proxy?

I have a testcase which makes use of OpenEjb's #LocalClient annotation (embedded container) and injects EJBs using the #EJB annotation:
#LocalClient
public class MyTestCase {
#EJB
private BoxDao boxDao;
...
}
BoxDao is a remote EJB interface. Now, for testing, I need to access some internal state of BoxDao's implementation BoxDaoBean, which is a stateful session bean. I created a protected method in BoxDaoBean, which exposes the needed internal state, but I found not yet a way to access it in my test case, since the injected BoxDao is a remote interface proxy (an cannot be cast to BoxDaoBean).
Is there a way to access the stateful session bean behind the remote interface BoxDao in the test case? Would not matter if solution is OpenEjb specific.
Update: We can't use EJB 3.1 specific solutions unfortunately, as we have several EJB 3.0 projects running. Using Proxy.getInvocationHandler(boxDao), I can get access to the OpenEjb container, via StatefulEjbObjectHandler. Is it possible to access the stateful bean this way?

You could try having BoxDaoBean also expose an #LocalBean interface. A single EJB can expose a near unlimited number of views from #WebService, #Local, #Remote, JAX-RS and more.
Just update your bean like so:
#Stateful
#LocalBean
public class BoxDaoBean implements BoxDao {
//...
}
Then add another field to your test:
#LocalClient
public class MyTestCase {
#EJB
private BoxDao boxDao;
#EJB
private BoxDaoBean boxDaoBean;
...
}

Adding a dependency to an EJB

I want to add a dependency to an EJB. How do I do this using Spring? The dependent object is a general service object. Based on code below I want to wire myDependency without having to use 'new'.
The EJB runs in weblogic.
#Stateless(mappedName = "MyBean")
public class MyBean implements MyBeanRemote, MyBeanLocal {
#EJB(name = "MyOtherBean")
private MyOtherBean myOtherBean;
private MyDependency myDependency;
...
}

This is well described in the Spring documentation:
For EJB 3 Session Beans and Message-Driven Beans, Spring provides a
convenient interceptor that resolves Spring 2.5's #Autowired
annotation in the EJB component class:
org.springframework.ejb.interceptor.SpringBeanAutowiringInterceptor.
This interceptor can be applied through an #Interceptors annotation in
the EJB component class, or through an interceptor-binding XML element
in the EJB deployment descriptor.
#Stateless
#Interceptors(SpringBeanAutowiringInterceptor.class)
public class MyFacadeEJB implements MyFacadeLocal {
// automatically injected with a matching Spring bean
#Autowired
private MyComponent myComp;
// for business method, delegate to POJO service impl.
public String myFacadeMethod(...) {
return myComp.myMethod(...);
}
...
}
Stateless EJBs and Spring beans, however, offer more or less the same possibilities. Mixing them together seems like unnecessary complexity.