Some objects set by @Autowired are null, others are set OK

[ymhr]

have been working on my first Spring project, and I've come across an annoying problem.

I have a class called 'UsernameService' which is configured as a bean in the dispatcher-servlet.xml:

<bean id="usernameService" class="service.UsernameService" scope="session" >
    <aop:scoped-proxy />
</bean>

and when this bean is created in one of my classes (bean definition

<bean id="testController" class="controller.TestController" />

as such:

@Autowired
UsernameService uns;

it works absolutely fine. However, when I try and do the same in another class, LogController:

<bean id="logController" class="controller.LogController" />

then it does not work, and I get the following error:

SEVERE: Servlet.service() for servlet [dispatcher] in context with path [/flexitime] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause java.lang.NullPointerException

I've managed to (I believe) ascribe this error to the fact that uns is never actually set/created and remains as null inside LogController.

I have Googled this extensively and have found many 'solutions', however as yet none of them have worked. I also posted this exact question on stackoverflow, however none of the responses have helped me solve the issue.

Thanks! James

[dr_pompeii]

Hello

Read carefully these topics
4.9.2 @Autowired
4.10 Classpath scanning and managed components