需要帮助创建使用方法注释中的值的特定切入点 [英] Need help creating a specific pointcut that utilizes a value from a method annotation

问题描述

我有以下方法

    @AutoHandling(slot = FunctionalArea.PRE_MAIN_MENU)
    @RequestMapping(method = RequestMethod.GET)
    public String navigation(ModelMap model) {
        logger.debug("navigation");
        ...

            //First time to the Main Menu and ID-Level is ID-1 or greater
            if (!callSession.getCallFlowData().isMainMenuPlayed()
                    && callSession.getCallFlowData().getIdLevel() >= 1) {
                // Call Auto Handling                    
                logger.info("Call AutoHandling");
                autoHandlingComponent.processAutoHandling();
            }
        ...

        return forward(returnView);
    }

基本上我想做的是在 processAutoHandling() 上有一个切入点但是在@After 中，我需要将 slot() 用于 @AutoHandling

Basically what I want to do, is have a pointcut on processAutoHandling() But in the @After, I need to use the slot() for @AutoHandling

我试过了，但它没有被调用

I tried this, but it does not get called

@Pointcut("execution(* *.processAutoHandling())")
public void processAutoHandleCall() {
    logger.debug("processAutoHandleCall");
}

@Around("processAutoHandleCall() &&" +
        "@annotation(autoHandling) &&" +
        "target(bean) "
)
public Object processAutoHandlingCall(ProceedingJoinPoint jp,
                                      AutoHandling autoHandling,
                                      Object bean)
        throws Throwable {
         ...

推荐答案

您可以为此使用虫洞设计模式.我正在说明使用基于 AspectJ 字节码的方法和语法，但如果您使用 Spring 的基于代理的 AOP，您应该能够使用显式 ThreadLocal 获得相同的效果.

You can use the wormhole design pattern for this. I am illustrating using AspectJ byte-code based approach and syntax, but you should be able to get the same effect using an explicit ThreadLocal if you are using Spring's proxy-based AOP.

pointcut navigation(AutoHandling handling) : execution(* navigation(..)) 
                                             && @annotation(handling);

// Collect whatever other context you need
pointcut processAutoHandleCall() : execution(* *.processAutoHandling());

pointcut wormhole(AutoHandling handling) : processAutoHandleCall() 
                                           && cflow(navigation(handling));

after(AutoHandling handling) : wormhole(hanlding) {
   ... you advice code
   ... access the slot using handling.slot()
}

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