Spring: Autowired is null in ejb class - spring

Question

I have the following situation:
#Controller
public class myController {
#Autowired
private IProxy service;
public ModelAndView init(HttpServletRequest request, HttpServletResponse response) throws Exception {
List<String> list = service.getName();
}
}
Then my Service is define as follow:
public interface IProxy {
public List<String> getName();
}
Proxy class is responsible for the lookup to the remote bean
#Service("service")
public class Proxy implements IProxy {
...
public List<String> getName() {
return myClass.getName();
}
And the implementation is the following:
#Interceptors(interceptor.class)
#Stateless
#Resource(name = "java:/db")
#Remote(MyClassRemote.class)
public class MyClassImpl extends MyEjb implements MyClassRemote{
#PersistenceContext(unitName = "db")
private EntityManager em;
#Resource
private SessionContext sctx;
#Autowired
public IMyRepo myRepo;
#Override
public List<String> getName() {
try {
return myRepo.getName(em);
}
catch (Exception ex) {
ex.printStackTrace();
throw ex;
}
finally {}
}
So, the problem is that here myRepo is null. I don't know why because IMyRepo and his implementation are always located within the path scanned by Spring.
Just one clarification: MyRepo class that implements IMyRepo is annotated with #Repository.
Any idea?

Answer 1

you can inject spring beans in EJB using Spring interceptors, as explained here in the official documentation. Basically you'll need to adjust your class as follows:
// added the SpringBeanAutowiringInterceptor class
#Interceptors({ interceptor.class, SpringBeanAutowiringInterceptor.class })
#Stateless
#Resource(name = "java:/db")
#Remote(MyClassRemote.class)
public class MyClassImpl extends MyEjb implements MyClassRemote{
// your code
}
You'll also need to define the context location in a beanRefContext.xml file (with your own application context file):
application-context.xml version
<bean id="context"
class="org.springframework.context.support.ClassPathXmlApplicationContext">
<constructor-arg>
<list>
<value>application-context.xml</value>
</list>
</constructor-arg>
</bean>
Java Configuration version:
<bean id="context"
class="org.springframework.context.annotation.AnnotationConfigApplicationContext">
<constructor-arg>
<list>
<value type="java.lang.Class">com.your.app.Configuration</value>
</list>
</constructor-arg>
</bean>

Answer 2

Spring beans and EJB are two different things, you can't just inject a Spring bean in an EJB, because that EJB is no Spring bean, so Spring doesn't know there is a field which should be injected by Spring (unless you use some fancy AOP stuff, which can enable injection into non-Spring-managed beans).