Re: [aspectj-users] Passing instance of Aspect into a pointcut

["Alexander Kriegisch" <alexander@xxxxxxxxxxxxxx>]

Hi Alex.

Your question is about Spring AOP rather than native AspectJ. Anyway, AFAIK you cannot inject a Spring bean into a static field, but of course you also cannot access an instance field from a static 'if()' method without some means to fetch a reference to the instance you wish to access. So if you think that an `if()` pointcut looks prettier than a condition at the beginning of an advice method, you are going to have to live with calling 'aspectOf()'.

Kind regards

--
Alexander Kriegisch
https://scrum-master.de

 

Alex Rojkov schrieb am 06.09.2022 05:11 (GMT +02:00):

I have an Aspect that defines @Around advice.

 

@Aspect 

class FooAspect {

  @spring.Autowired Env env; 

 

  @Around(some()) 

  public Object advice(String name) {

     return env.get(name);

  }

}

 

I'd like this Aspect to execute when env is not null and delegate to JoinPoint when it is null. 

 

@Around(some())

public Object advice(String name, ProceedingJointPoint pjp) {

   if (env != null) {

        return env.get(name);

    else 

        return pjp.proceed();

}

 

However, I'd like to avoid cluttering the advice and do something like this instead.

 

@Pointcut("if()") 

public static boolean isActive(FooAspect aspect) {

   return aspect.env != null;

}

 

 @Around(isActive() && some()) 

  public Object advice(String name, ProceedingJointPoint pjp) {

     return env.get(name);

  }

 

Question: is there a way to pass the instance of the advice to the isActive() pointcut? 

 

I'd like to avoid using Aspects.aspectOf() to get hold of the instance. 

 

Thanks,

Alex