AOP problem running Spring unit tests

Question

I have a Spring web application which is configured to use JDK proxying for AOP. The AOP annotations (such as @Transactional) are declared on the interfaces, rather than the imp

Answer 1

Sounds like you're referencing an implementation class instead of an interface. There is an excerpt here with more detail.

A Spring forum post: "Mixing JDK and CGLIB proxies"

A great blog post explaining pros and cons of JDK vs. CGLIB proxies.

Answer 2

Hey Jean, CGLib proxies are created by subclassing the class to be proxied -- you're attempting to proxy another proxy which isn't allowed since proxies are themselves final classes. Hence:

Caused by: java.lang.IllegalArgumentException: Cannot subclass final class class $Proxy25

Answer 3

I don't know if the solution was already shared and I am also sure the original requester must have found a solution, since it is a one year old query. For public interest however let me mention it here. Spring was using CGLIB because of the following declaration.

<!-- Post-processor for @Aspect annotated beans, which converts them into AOP advice --> 
<bean class="org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator">
      <property name="proxyTargetClass" value="true"/>
</bean>

The property should be set to false, so that the CGLIB is not triggered instead JDK Dynamic Proxying.

<property name="proxyTargetClass" value="false"/>

Hope that helps.