Spring MVC to SpringBoot 2: The bean 'xyz' could not be injected as a 'com..Abc' because it is a JDK dynamic proxy that implements:

Question

I have a working project in Spring Web MVC. Class 'A' is an abstract class. Class 'B' extends A and class 'C' extends B. Class C has following annotations;

@Component
@Primary

Everything has been working fine until recently, we have decided to go to SpringBoot 2. We have migrated our project to SpringBoot 2, added required dependencies. Now, when I run the project, I get this error;

Bean named 'c' is expected to be of type 'com..B' but was actually of type 'com.sun.proxy.$Proxy132'

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APPLICATION FAILED TO START
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Description:

The bean 'c' could not be injected as a 'com..B' because it is a JDK dynamic proxy that implements:

Action:

Consider injecting the bean as one of its interfaces or forcing the use of CGLib-based proxies by setting proxyTargetClass=true on @EnableAsync and/or @EnableCaching.

I have done some digging and found a common solution online which does not work for me.*; **Using any of these annotations;

@EnableAspectJAutoProxy(proxyTargetClass=true)
@EnableAsync(proxyTargetClass=true)
@EnableCaching.(proxyTargetClass=true)

PS I have configuration class as given below;

EnableAspectJAutoProxy(proxyTargetClass=true)
@Configuration("mySpringConfig")
@ComponentScan(basePackages = { "com.allpackages" }, excludeFilters = {someExcludeFilters})
@Conditional(SomeApiSpringConfigCondition.class)
public class SomeCoreSpringConfig extends ApiWebConfiguration{
}

Also, SpringBoot entry point looks like below;

@SpringBootApplication(exclude = { SomeClasses})
@EnableWebMvc
public class AppInitializer {

    public static void main(String[] args) {

        SpringApplication.run(AppInitializer.class, args);

    }

}

Thanks in advance!

Answer 1

After a lot of digging, got it working by adding following to class "C". @Scope(proxyMode = ScopedProxyMode.TARGET_CLASS)

So my class "C" looks like;

@Component
@Primary
@Scope(proxyMode = ScopedProxyMode.TARGET_CLASS)
class C{}

However, now the error is coming for other classe. So I would say, not a sustainable solution!