java - 方面未在运行时执行(Spring 3、AspectJ)

Question

我已经创建了一个方面，但它似乎不起作用，我在日志中看不到任何内容，也没有错误消息或日志中任何对我有帮助的内容。

存储库由 Spring Autowiring 到另一个 bean 中，这样组件扫描就可以工作。该方面位于正在扫描的包裹内。我的类路径中有aspectj。

方面:

@Aspect
@Component
public class LoggingAspect {

    private static Logger logger = Logger.getLogger(LoggingAspect.class);

    @Before("execution(* nl.bar.repository.*.*(..))")
    public void logIt(JoinPoint joinPoint) {
        logger.debug("WE'RE LOGGING IT!!!!");      
    }
}

Spring bean:

package nl.bar.repository

@Component
public class BarRepository {

    public List<Bar> findBar() {
        ....
    }
}

应用程序上下文:

<context:annotation-config />
<context:component-scan base-package="nl.bar" />
<aop:aspectj-autoproxy/>

Maven:

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
    <version>2.5.6</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
    <artifactId>aspectjrt</artifactId>
    <version>1.6.11</version>
</dependency>
<dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.6.11</version>
</dependency>

Answer 1

您必须省略一些 Maven 依赖项，因为如果没有 spring-context，代码就无法编译。添加spring-context，代码按原样工作。

这是我对问题的猜测:方面包/类的日志记录级别未设置为调试。

这是我的版本，以及一些成功的输出，基本上没有任何更改:

<dependencies>
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>2.5.6</version>
  </dependency>

  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
    <version>2.5.6</version>
  </dependency>

  <dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjrt</artifactId>
    <version>1.6.11</version>
  </dependency>

  <dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.6.11</version>
  </dependency>

  <dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.16</version>
  </dependency>
</dependencies>

applicationContext.xml 文件保持不变，Java 也是如此，只是我的存储库类很简单:

@Component("repo")
public class BarRepository implements Repo {
    public String findBar() {
        return "Hello!";
    }
}

健全性检查main如下:

public static void main(String[] args) {
    LOG.debug("Initializing context...");
    ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");

    LOG.debug("Retrieving bean...");
    Repo repo = (Repo) context.getBean("repo");

    LOG.debug("Calling bean...");
    System.out.println(repo.findBar());
}

通过 DEBUG 处的 org.springframework.aop 日志记录以及 INFO 处的方面类，我得到以下输出:

DEBUG nl.main.Main - Initializing context...
INFO  org.springframework.context.support.ClassPathXmlApplicationContext - Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@1125127: display name [org.springframework.context.support.ClassPathXmlApplicationContext@1125127]; startup date [Sat Nov 12 16:39:45 EST 2011]; root of context hierarchy
INFO  org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [applicationContext.xml]
INFO  org.springframework.context.support.ClassPathXmlApplicationContext - Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@1125127]: org.springframework.beans.factory.support.DefaultListableBeanFactory@89cc5e
INFO  org.springframework.beans.factory.support.DefaultListableBeanFactory - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@89cc5e: defining beans [org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,repo,loggingAspect,org.springframework.aop.config.internalAutoProxyCreator]; root of factory hierarchy
DEBUG org.springframework.aop.aspectj.annotation.ReflectiveAspectJAdvisorFactory - Found AspectJ method: public void nl.bar.aspects.LoggingAspect.logIt(org.aspectj.lang.JoinPoint)
DEBUG org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator - Creating implicit proxy for bean 'repo' with 0 common interceptors and 2 specific interceptors
DEBUG org.springframework.aop.framework.JdkDynamicAopProxy - Creating JDK dynamic proxy: target source is SingletonTargetSource for target object [nl.bar.repository.BarRepository@1dec1dd]
DEBUG nl.main.Main - Retrieving bean...
DEBUG nl.main.Main - Calling bean...
INFO  nl.bar.aspects.LoggingAspect - WE'RE LOGGING IT!!!!
Hello!

我敢打赌这要么是日志级别问题，要么它没有像您想象的那样编译，因为它应该按编写的方式工作。