对于"after():staticinitialization(*)"的@AspectJ语法； [英] @AspectJ syntax for "after() : staticinitialization(*)"

问题描述

我正在尝试使用 pertypewithin 实例化模型实现跟踪方面. 这样，我就可以在每种类型的每个类中使用一个记录器.

I'm trying to implement a tracing aspect using the pertypewithin instantiation model. In this way, I'll be able to use one logger per class per type.

从周围的一些例子中，我们可以找到以下代码来启动记录器:

From some examples arround the we I can find this code to init the logger:

public abstract aspect TraceAspect pertypewithin(com.something.*) {
    abstract pointcut traced();
    after() : staticinitialization(*) {
        logger = Logger.getLogger(getWithinTypeName());
    }
    before() : traced() {
        logger.log(...);
    }
    //....
}

不幸的是，我无法将其完全转换为@AspectJ语法(这是我无法控制的项目要求)，尤其是其中我需要设置记录器，仅执行一次该代码的部分.

unfortunately, I'm not able to fully translate this to the @AspectJ syntax (it's a project requirement outside my control), especially the part in with I need to setup the logger, executing that code only once.

这可能吗?

谢谢

推荐答案

@Aspect("pertypewithin(com.something.*))")
public abstract class TraceAspect {

Logger logger;

@Pointcut
public abstract void traced();

@Pointcut("staticinitialization(*)")
public void staticInit() {
}

@After(value = "staticInit()")
public void initLogger(JoinPoint.StaticPart jps) {
    logger = Logger.getLogger(jps.getSignature().getDeclaringTypeName());
}

@Before(value = "traced()")
public void traceThatOne(JoinPoint.StaticPart jps) {
    logger.log(jps.getSignature().getName());
}
}

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