@EnableAspectJAutoProxy does not work

Question

I am using Spring Boot, and I would like to use AspectJ with it.

The following works (of course):

@Aspect
@Component
public class RequestMappingAspect {

    @Before("@annotation(org.springframework.web.bind.annotation.RequestMapping)")
    public void advice(JoinPoint joinPoint) {
        ...
    }
}

However, if @Component is removed and @EnableAspectJAutoProxy is added, the following does not work.

@SpringBootApplication
@EnableSwagger2
@EnableAspectJAutoProxy
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

How to enable AspectJ auto proxy correctly?

Answer 1

You need both @EnableAspectJAutoProxy for the spring configuration and combination of @Aspect / @Component annotations

@EnableAspectJAutoProxy does the same thing as xml based <aop:aspectj-autoproxy>

Answer 2

Wondering about the same thing, we ended up doing something similar to this:

@EnableAspectJAutoProxy(proxyTargetClass = true)
@Configuration("Main applicationContext")
@ComponentScan(
    basePackages = {"com.where.ever"},
    excludeFilters = {@ComponentScan.Filter(Aspect.class)})
public class ApplicationConfiguration {
    @Bean(autowire = Autowire.BY_TYPE)
    public SomeAspect someAspect() {
        return Aspects.aspectOf(SomeAspect.class);
    }
    ...
    ...
}

This enabled us to just add the @Aspect-annotation on the aspects, which also wired them correctly. Might be that this was a pointless reply, however, it explains how we solved the issue - and not the actual solution to the problem. Let me know if you want this to be deleted.