Spring AutoWire gives Null Pointer exception

Question

I have a maven mutli module project :

• Project

  -ProjectDAO

  -Projectx

ProjectDAO uses spring + hibernate From Projectx I am trying to use something like below:

public class TesMessage implements ITesMessage {

@Autowired
private IGlobal iGlobal;
    ...
    iGlobal.getSomeMethod();
 }

.. With the above code I get Null Pointer exception, Am i missing anything?

I have this in my appContext.xml

<context:component-scan base-package="com.test.nty.dal">
  <context:include-filter type="annotation"
    expression="org.springframework.stereotype.Repository" />
</context:component-scan>

Thanks

Answer 1

Believe the exception: Yes, you're missing something.

You don't show how you've annotated the IGlobal interface. The exception suggests that it's not under Spring's control. You have to let the Spring app context handle its creation as well as your TextMessage .

I would question this design. I don't see why every text message would need something global. Looks like a singleton bottleneck to me.