How to enable with java-based annotations

Question

I am trying to set up Spring AOP without any XML. I'd like to enable <aop:aspectj-autoproxy> in a class which is annotated with @Configuration.

This is the way it would be defined in an XML-file:

<aop:aspectj-autoproxy>
<aop:include name="msgHandlingAspect" />
</aop:aspectj-autoproxy>

I tried to annotate my class with @Configuration and @EnableAspectJAutoProxy but nothing happened.

http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/context/annotation/EnableAspectJAutoProxy.html — firstpostcommenter, Mar 15 '17 at 10:25

score 48 · Answer 1 · answered May 04 '12 at 13:23

48

Did you create an aspect bean in the same @Configuration class? Here's what the docs suggest:

 @Configuration
 @EnableAspectJAutoProxy
 public class AppConfig {
     @Bean
     public FooService fooService() {
         return new FooService();
     }

     @Bean // the Aspect itself must also be a Bean
     public MyAspect myAspect() {
         return new MyAspect();
     }
 }

answered May 04 '12 at 13:23

Sean Patrick Floyd

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1

Yes, I created an aspect bean in the same @Configuration class as shown in your example. But still nothing happens. I now imported the in an extra xml-file and added this via ImportResource to my Configuration class. Now the Aspect works. But the better way would be to have the configuration in the same Configuration class – user1374907 May 07 '12 at 15:48
1

Exactly what I looking for. Even the class name is the same with mine :D – Thai Tran Mar 27 '14 at 04:14
I don't declare a @Bean for my Aspect , but the advice works, why? – JaskeyLam Nov 01 '14 at 14:15
1

@Jaskey picked up by component scan? – Sean Patrick Floyd Nov 02 '14 at 16:16
@SeanPatrickFloyd, yes, I use component scan in my xxx-servet.xml – JaskeyLam Nov 04 '14 at 04:54
@Jaskey hmmm, I can only explain that if your aspect is also annotated as `@Component`or similar. See [the relevant section of the manual](http://docs.spring.io/spring/docs/current/spring-framework-reference/htmlsingle/#aop-at-aspectj) – Sean Patrick Floyd Nov 04 '14 at 07:56
So, can I think that @component or @Bean-->return an instance is doing the same thing in Spring, which is trying to declare a bean for Spring container to hold? – JaskeyLam Nov 04 '14 at 09:12
yeah, pretty much. they are two different ways to achieve the same thing, make a class instantiated and managed by Spring – Sean Patrick Floyd Nov 04 '14 at 09:51
Thanks Sean. its very useful. – Lova Chittumuri Sep 21 '17 at 11:50
1

remember to add proxyTargetClass = true otherwise you can have unexpected errors if you used in controller @EnableAspectJAutoProxy(proxyTargetClass = true) – FarukT Jun 05 '19 at 10:10
1

@FarukT that's for when you use class-based proxies. I prefer to use interface based proxies. – Sean Patrick Floyd Jun 07 '19 at 02:03

score 3 · Answer 2 · answered Jun 05 '19 at 10:15

I used the accepted answer solution but I had unexpected problems and never understand untill to add this parameter to configuration.

@EnableAspectJAutoProxy(proxyTargetClass = true)

If you use annotation into @Controller you'll need to configure in this way

remember if you have java 8 you need to use a version of AspectJ greater than 1.8.X

@Configuration
@EnableAspectJAutoProxy(proxyTargetClass = true)
public class AppConfig {

    @Bean
    public AccessLoggerAspect accessLoggerAspect() {
        return new AccessLoggerAspect();
    }

}

How to enable with java-based annotations

2 Answers2

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