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How to create pointcut to feign client that supports interface inheritance?

In a Spring Boot project I have a simple feign client

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I need to intercept all calls and for this and I’m creating a common library that can be used in different projects. To achieve it I try to use Spring AOP. I created an aspect that wraps all public methods of the object annotated with MyAnnotation

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It works correctly and all calls are intercepted till I tried to put MyAnnotation on the feign client that uses inheritance for feign interfaces. When I init my client with inherited interface calls are not intercepted anymore.

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I tried:

  • "@target(MyAnnotation) && execution(public * *(..))" but when I connected my library to the real project I got java.lang.IllegalArgumentException: Cannot subclass final class org.springframework.boot.autoconfigure.AutoConfigurationPackages$BasePackages It seems that it wanted to wrap all to the proxy and there were final classes.
  • "@target(MyAnnotation) && execution(public * com.my.company.base.package.*(..))" removed previous issue but gave another one, like some bean cannot be instantiated without name, etc.

The question is how to make it work without moving @MyAnnotation to the base interface FeignClientInterface. It is in another project and I don’t have a control on it.

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Answer

Ok, after hours of investigation I replaced my pointcut with this one

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As explained here I used only execution to avoid proxy creation.

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