java - AspectJ:一个方面内多个通知的执行顺序(优先级)

Question

类使用编译时编织。

假设我有方面类:

@Aspect
public class SecurityInterceptor {

    @Pointcut("within(@org.springframework.stereotype.Controller *)")
    public void beanAnnotatedWithController() {}

    @Pointcut("execution(public * *(..)) && args(*,httpReq)")
    public void publicMethods(HttpServletRequest httpReq) {}

    @Pointcut("beanAnnotatedWithController() && publicMethods(httpReq)")
    public void controllerMethods(HttpServletRequest httpReq) {}

    @Pointcut("execution(public * *(..)) && args(httpReq)")
    public void publicMethodsRequestOnly(HttpServletRequest httpReq) {}

    @Pointcut("beanAnnotatedWithController() && publicMethodsRequestOnly(httpReq)")
    public void controllerMethodsOneArg(HttpServletRequest httpReq) {}


    @Around(value = "controllerMethods(httpReq)")
    public Object populateSecurityContext(final ProceedingJoinPoint joinPoint, HttpServletRequest httpReq) throws Throwable {
        return popSecContext(joinPoint, httpReq);
    }

    @Around(value = "controllerMethodsOneArg(httpReq)")
    public Object populateSecurityContextOneArg(final ProceedingJoinPoint joinPoint, HttpServletRequest httpReq) throws Throwable {
        return popSecContext(joinPoint, httpReq);
    }

}

使用@DeclarePrecedence 确定执行顺序的正确方法是什么？

Answer 1

请阅读 language semantics 中的“建议优先级”段落AspectJ 文档的一部分。

方面的优先级可以明确声明，单个方面内的建议的优先级由文档中描述的规则决定，不能更改，AFAIK。所以在这种情况下，@DeclarePrecedence 不会帮助您，只会更改方面文件中通知的顺序。