在CrudRepository和Annotation上的Spring + AspectJ切入点 [英] Spring + AspectJ pointcut on CrudRepository and Annotation

问题描述

我有@Tenantable注释来决定pointCut:

I have @Tenantable annotation to decide for pointCut :

@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
public @interface Tenantable {
}

这是我的方面:

 @Slf4j
    @Aspect
    @Configuration
    public class TenancyAspect {

        @Pointcut("execution(public * *(..))")
        public void publicMethod() {}

        @Around("publicMethod() && @within(com.sam.example.aspect.aspectexample.model.Tenantable)")
        public Object tenatable(ProceedingJoinPoint joinPoint) throws Throwable {
            System.out.println("my operations ...");
            return joinPoint.proceed();
        }
    }

对于此服务类，此方法没有任何问题:

This is working without any problem for this service class :

@Tenantable
@Service
public class MyService(){
    public void doSomething(){
            ...
    }
}

当我调用doSomething()方法时，我的方面正在运行，可以，但是我想为属于spring数据的CrudRepository接口实现方面.

my aspect is running when I call doSomething() method, It is ok but I want to implement aspect for CrudRepository interface that belongs spring data.

我已经更改了我的方面以实现以下目标:

I have changed my Aspect to achieve this like below :

@Slf4j
@Aspect
@Configuration
public class TenancyAspect {

    @Pointcut("execution(public * *(..))")
    public void publicMethod() {}


    @Pointcut("this(org.springframework.data.repository.Repository)")
    public void repositoryExec(){}


    @Around("publicMethod() && repositoryExec() && @within(com.sam.example.aspect.aspectexample.model.Tenantable)")
    public Object tenatable(ProceedingJoinPoint joinPoint) throws Throwable {
        System.out.println("my operations ...");
        return joinPoint.proceed();
    }
}

这是存储库:

@Tenantable
@Repository
public interface MyRepository extends CrudRepository{
}

但是当我在MyRepository内调用任何方法时，它不起作用.

But it doesn't work when I call any method inside of MyRepository.

反正有这样做吗?

当我应用这些库时，它适用于所有存储库:

Edit : It works for all repositories when I apply these :

@Pointcut("execution(public * org.springframework.data.repository.Repository+.*(..))")

并排除此:

@within(com.sam.example.aspect.aspectexample.model.Tenantable)

但是我需要此注释才能将其应用于特定的存储库.

But I need this anotation to apply it for specific repositories.

推荐答案

再看一遍，我想我知道这是怎么回事:您假设仅仅是因为您做了注释@Inherited，它将被继承通过实现类(如果您对接口进行注释).但是这个假设是错误的. @Inherited仅在一种情况下有效:扩展带注释的基类时.它不适用于带注释的接口，方法等.

Having taken another look, I think I know what is going on here: You are assuming that just because you made your annotation @Inherited, it will be inherited by implementing classes if you annotate an interface. But this assumption is wrong. @Inherited only works in exactly one case: when extending an annotated base class. It does not work for annotated interfaces, methods etc. This is also documented here:

请注意，如果注释类型用于注释除类之外的任何内容，则此元注释类型无效.还要注意，此元注释仅使注释从超类继承；已实现的接口上的注释无效.

Note that this meta-annotation type has no effect if the annotated type is used to annotate anything other than a class. Note also that this meta-annotation only causes annotations to be inherited from superclasses; annotations on implemented interfaces have no effect.

注释您的实现类后，它就会起作用.

As soon as you annotate your implementing class, it works.

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