Aspectj:为什么不能应用建议? [英] aspectj: why advice cannot be applied?

问题描述

我已经创建了非常基本的aspectJ项目.我不知道为什么不能应用建议.

I've created very basic aspectJ project. I have no idea why advice cannot be applied.

注释

import java.lang.annotation.*;

@Retention(RetentionPolicy.RUNTIME)  
@Target(ElementType.METHOD)  
@Documented  
public @interface Conditional {  
    String value();  
}  

和AspectJ类:

@Aspect
public class AspectE {

    @Around("call(@Conditional * *.*(..)) && @annotation(conditional)" )
    public Object condition(ProceedingJoinPoint joinPoint, Conditional conditional) throws Throwable {

        System.out.println("entry point says hello!");
        return joinPoint.proceed();
    }
}

主要:

public class Main {

    @Conditional("")
    public static void main(String[] args) {
        System.out.println("main good morning");
    }
}

您能告诉我我应该更改为接收这两个消息吗?

Could you please tell me what I should change to receive both messages?

推荐答案

我认为这是因为call(@Conditional * *.*(..))基本上是编织调用方的，在这种情况下，调用方是命令行，因此没有进行编织

I think it is because of the call(@Conditional * *.*(..)) which basically weaves the callers , the caller in this specific case is the command line and so there is no weaving happening.

您可能应该将其更改为执行，这应该可以工作.

You should probably change it to execution instead, that should work.

@Around("execution(@Conditional * *.*(..)) && @annotation(conditional)" )

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