从EJB会话Bean调用Spring Bean

Question

I want to call my Spring bean from my EJB Session Bean. Here is an example scenario that I want to achieve.

Spring Interface:

public interface ReqSpring {
    public String processMsg(String msg);
}

Spring Bean:

@Component
public class ReqStringImpl implements ReqSpring{

    public String processMsg(String msg) {
        return "Msg ["+msg+"] is processed";
    }
}

EJB Interface:

@Remote
public interface EjbService{
    String echo(String msg);
}

EJB Session Bean:

(please notice that I have used @Autowired over a Spring object)

@Stateless(name = "EjbWS", mappedName = "EjbWS")
@WebService(name = "EjbService", portName = "EjbServicePort")
public class EjbServiceBean implements EjbService {

    =====> @Autowired
    =====> private ReqSpring reqSpring;

    public EjbServiceBean() {
    }

    @WebMethod
    public String echo(@WebParam(name="msg")String msg) {
            // This is printing null
        System.out.println("ReqSpring = "+reqSpring);
        return reqSpring.processMsg(msg);
    }
}

My Application failed to load the ReqSpring object from my EJB and always generating NullPointerException . Any idea why this is happening?

Answer 1

You can't inject a Spring Bean into a EJB like that because the EJB is not managed by the Spring container. Anyway, by using the SpringBeanAutowiringInterceptor , you will be able to do it. Try with this annotation :

@Stateless(name = "EjbWS", mappedName = "EjbWS")
@WebService(name = "EjbService", portName = "EjbServicePort")
@Interceptors(SpringBeanAutowiringInterceptor.class)
public class EjbServiceBean implements EjbService {

    @Autowired
    private ReqSpring reqSpring;

    public EjbServiceBean() {
    }

    @WebMethod
    public String echo(@WebParam(name="msg")String msg) {
        System.out.println("ReqSpring = "+reqSpring);
        return reqSpring.processMsg(msg);
    }
}