AspectJ:一个方面内多个通知的执行顺序(优先级)

问题描述

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?

What is the correct way to use @DeclarePrecedence to determine the execution order?

推荐答案

请阅读 语言语义 部分的 AspectJ 文档.

Please read paragraph "Advice precedence" in the language semantics section of the AspectJ documentation.

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 @DeclarePrecedence 在这种情况下不会帮助你，只会改变方面文件中的通知顺序.

Precedence of aspects can be declared explicitly, precedence of advice within a single aspect is determined by rules described in the document and cannot be changed, AFAIK. So @DeclarePrecedence will not help you in this case, only changing the order of advice within the aspect file.

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