Spring AOP @AOP访问@批注的值

Question

我有一个自定义注释，

@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface XAudit {
    AuditActionType action();
}

我在一些方法上使用这个注释，如下所示，

@XAudit(action = "REGISTRATION")
public RegistrationDTO register(UserDetail detail) {
    //Logic
    return dto;
}

我捕捉事件的方面如下，

@Around(value = "@annotation(XAudit)")
public Object postAuditEvent(ProceedingJoinPoint joinPoint, XAudit xAudit) throws Throwable {

        String action = xAudit.action();  //Accessing Action for logic decision making  

        Object result = joinPoint.proceed();

        //audit processing logic

        return result;
}

@Around建议只适用于ProceedingJoinPoint参数。如果将XAudit作为第二个参数传递，则会引发以下错误：

 Error creating bean with name 'metaDataSourceAdvisor': Cannot resolve reference to bean 'methodSecurityMetadataSource' while setting constructor argument; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration': Unsatisfied dependency expressed through method 'setObjectPostProcessor' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.config.annotation.configuration.ObjectPostProcessorConfiguration': Initialization of bean failed; nested exception is java.lang.IllegalArgumentException: 
error at ::0 formal unbound in pointcut 
            at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498)
            at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317)
            at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
            at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315)
            at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:204)
            at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:238)
            at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:710)
            at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:535)
            at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140)
            at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
            at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395)
            at org.springframework.boot.SpringApplication.run(SpringApplication.java:327)

我需要使用xAudit in方面来访问XAudit的action。请分享一些关于如何访问“XAudinin@”的值的提示。

Answer 1

在@Around(value = "@annotation(XAudit)")中有一个错误，它应该是xAudit (x是小写)

尝试：@Around(value = "@annotation(xAudit)")

此外，要从注释中获得操作值，您需要使用xAudit.action()而不是xAudit.getAction()。

完整的代码如下所示

@Component
@Aspect
public class XAuditAspect {
    @Around(value = "@annotation(xAudit)")
    public Object postAuditEvent(ProceedingJoinPoint joinPoint, XAudit xAudit) throws Throwable {
            String action = xAudit.action();  //Accessing Action for logic decision making
            Object result = joinPoint.proceed();
            //audit processing logic
            System.out.println(xAudit.action());
            return result;
    }
}