Spring AOP - 切入点未触发

发布于 2024-09-11 23:25:03 字数 1803 浏览 4 评论 0原文

我刚刚开始在我的项目中使用 Spring AOP，并且在使 Spring AOP 正常工作方面遇到一些问题。

我有两个对象，TransportImpl 和 SessionImpl，我想通过 AOP 对其进行分析。两个对象（bean）都是通过 Spring 初始化的。两个 bean 都是业务的实现接口（传输和会话）。我可以让应用于 TransportImpl bean 的方面正常工作，但应用于 SessionImpl 的方面却不会触发。我可以确认 “mySessionMonitor”Aspect 由 Spring 初始化，并且 SessionImpl 对象也被初始化，没有任何异常或错误。

我已经将切入点和方面简化为最基本的形式。我期望下面描述的 PointCut sessionOperation 当初始化 SessionImpl bean 并调用 init 方法初始化时触发。但这永远不会发生。这里可能出了什么问题？

来自配置文件：

<bean id="MyTransport" class="my.app.transport.TransportImpl"   scope="singleton" />                
<bean id="MySession" class="my.app.session.SessionImpl" init-method="initialise" scope="singleton" />

<aop:aspectj-autoproxy proxy-target-class="true">
    <aop:include name="myTransportMonitor" />
    <aop:include name="mySessionMonitor" />
</aop:aspectj-autoproxy>

<bean id="myTransportMonitor" class="my.app.aspects.TransportMonitoringAspect"/>
<bean id="mySessionMonitor"   class="my.app.aspects.SessionMonitoringAspect" />

方面代码

// Aspect monitoring code
@Aspect
public class SessionMonitoringAspect
{
    private Logger fileLogger = Logger.getLogger("myLogger");

    public void initialise()
    {
        fileLogger.info("Initialising SessionMonitoringAspect");
    }

    @Pointcut ("execution (public * *(..))")
    private void anyPublicOperation(){}

    @Pointcut ("within(my.app.session..*)")
    private void inSession(){}

    @Pointcut("anyPublicOperation() && inSession()")
    private void sessionOperation(){}

    @Before("sessionOperation()")
    public void sessionOperationDetected(JoinPoint jp)
    {
        fileLogger.info("Session operation detected - signature: " + jp.getSignature());
    }
}

原文

I am just getting started with Spring AOP in my project and am having some problems with getting Spring AOP working correctly.

I have two objects, TransportImpl and SesssionImpl that I would like to profile via AOP. Both objects(beans) are initialised via Spring. Both beans are implementations of business
interfaces (Transport and Session). I can get Aspects applied to the TransportImpl bean to work well, but those applied to the SessionImpl just do not fire. I can confirm that the
"mySessionMonitor" Aspect is initialised by Spring, and that the SessionImpl object is also initialised without any exceptions or errors.

I have stripped down my PointCuts and Aspect to the most basic form possible. I would have expected the PointCut sessionOperation described below
to fire when the SessionImpl bean is initialised and the init-method initialise is called. But this never happens. What might be going wrong here?

From the configuration file:

<bean id="MyTransport" class="my.app.transport.TransportImpl"   scope="singleton" />                
<bean id="MySession" class="my.app.session.SessionImpl" init-method="initialise" scope="singleton" />

<aop:aspectj-autoproxy proxy-target-class="true">
    <aop:include name="myTransportMonitor" />
    <aop:include name="mySessionMonitor" />
</aop:aspectj-autoproxy>

<bean id="myTransportMonitor" class="my.app.aspects.TransportMonitoringAspect"/>
<bean id="mySessionMonitor"   class="my.app.aspects.SessionMonitoringAspect" />

Aspect code

// Aspect monitoring code
@Aspect
public class SessionMonitoringAspect
{
    private Logger fileLogger = Logger.getLogger("myLogger");

    public void initialise()
    {
        fileLogger.info("Initialising SessionMonitoringAspect");
    }

    @Pointcut ("execution (public * *(..))")
    private void anyPublicOperation(){}

    @Pointcut ("within(my.app.session..*)")
    private void inSession(){}

    @Pointcut("anyPublicOperation() && inSession()")
    private void sessionOperation(){}

    @Before("sessionOperation()")
    public void sessionOperationDetected(JoinPoint jp)
    {
        fileLogger.info("Session operation detected - signature: " + jp.getSignature());
    }
}

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盗心人 2024-09-18 23:25:03

我个人更喜欢将 Aspect 切入点配置放在应用程序上下文中，并且您缺少 aop:aspect 中的 ref。

 <bean id="mySessionMonitor"   class="my.app.aspects.SessionMonitoringAspect" />

 <aop:config proxy-target-class="true">
  <aop:aspect ref="mySessionMonitor">
   <aop:pointcut id="around" expression="execution (public * *(..))"/></aop:pointcut>
   <aop:around pointcut-ref="around" method="aroundAdvice"/>
  </aop:aspect>
 </aop:config>

I personally prefer to put the Aspect pointcut configuration in the application context, and you are missing the ref in aop:aspect.

 <bean id="mySessionMonitor"   class="my.app.aspects.SessionMonitoringAspect" />

 <aop:config proxy-target-class="true">
  <aop:aspect ref="mySessionMonitor">
   <aop:pointcut id="around" expression="execution (public * *(..))"/></aop:pointcut>
   <aop:around pointcut-ref="around" method="aroundAdvice"/>
  </aop:aspect>
 </aop:config>

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渡你暖光 2024-09-18 23:25:03

如果您更喜欢基于注释的配置，请参阅我编写的这个示例。 XML 配置中所需的只是。

回复收藏 0 原文

风吹雨成花 2024-09-18 23:25:03

我希望 initialise() 方法不是 my.app.session.SessionImpl 的一部分。如果是这样，您的方面的 initialise() 方法将不会触发。因为你不能从bean类中调用aspect的方法。否则请附上 my.app.session.SessionImpl 代码以供详细了解。