Spring - force cglib proxies for @ Custom fields

Question

I have a mixed stack: EJB and Spring. For Spring SpringBeanAutowiringInterceptor in EJB, I use SpringBeanAutowiringInterceptor (not sure if this could affect my problem).

At the same time, trying to make autwire beans as follows:

 @Scope(proxyMode=ScopedProxyMode.TARGET_CLASS, value="singleton") @Repository public class ClassA imlpements IfA { ... } @Scope(value="singleton") @Repository public class ClassB { @Autowired private ClassA classA; ... } 

I get an error:

 Could not autowire field: private ClassA ClassB.classA; nested exception is java.lang.IllegalArgumentException: Can not set ClassA field ClassB.classA to com.sun.proxy.$Proxy257. Please see server.log for more details. 

As I understand it, the problem is that the JDK proxies are used (since ClassA implements the IfA interface), while I need cglib.

But I do not understand. Based on the docs, the annotation: @Scope(proxyMode=ScopedProxyMode.TARGET_CLASS, should do the job here.

Well, this is not an option for me to use interfaces (as a type of field).

Any idea how to get cglib to proxy here?

EDIT

Not sure if this is relevant, but I am running glassfish 3.1.x.

And stacktrace (partial, as I cannot expose all class names here:

 Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'classB': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private ClassA ClassB.classA; nested exception is java.lang.IllegalArgumentException: Can not set ClassA field ClassB.classA to com.sun.proxy.$Proxy257. at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1116) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194) at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:912) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:855) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:770) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:486) ... 89 more Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private ClassA ClassB.classA; nested exception is java.lang.IllegalArgumentException: Can not set ClassA field ClassB.classA to com.sun.proxy.$Proxy257. Please see server.log for more details. at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:514) at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285) ... 100 more Caused by: java.lang.IllegalArgumentException: Can not set ClassA field ClassB.classA to com.sun.proxy.$Proxy257 at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:164) at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:168) at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:81) at java.lang.reflect.Field.set(Field.java:741) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:510) ... 102 more 

Answer 1

You should not use proxies with advanced features for single packets.

Use <aop:aspectj-autoproxy proxy-target-class="true" /> or @EnableAspectJAutoProxy(proxyTargetClass=true) in the configuration file or spring class to force the use of cglib proxies.