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Message-ID: <4648E605.9080406@balazuc.net>
Date: Mon, 14 May 2007 18:43:17 -0400
From: Denis Balazuc <denis@balazuc.net>
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To: raphael.pieroni.dexem@gmail.com
CC: user@roller.apache.org
Subject: Re: Using Spring AOP around roller classes
References: <4642D9F7.2050608@gmail.com>
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Hi Raphael

You can set interceptors with Spring using the BeanNameAutoProxyCreator 
and its friends (they are other techniques but that's the one I know/use 
the most)

The example below wraps a "blog.dao.blogManagerDAO" bean (defined 
elsewhere in the Spring config) with a transaction interceptor named 
"blog.dao.transactionInterceptor", which is an interceptor bean also 
defined elsewhere.
The BeanNameAutoProxyCreator (Spring) class contains properties 
"interceptorNames", and "beanNames" which
tell it which objects methods calls you want to wrap with which 
interceptors. There is probably classes in Spring for selecting which 
methods to intercept too, and other exotic things.

Example:

      <bean
         id="beanNameAutoProxyCreator1"
         name="beanNameAutoProxyCreator1"
 
class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
         <property name="interceptorNames">
             <list>
                 <value>blog.dao.transactionInterceptor</value> 

             </list>
         </property>
         <property name="beanNames">
             <value>blog.dao.blogManagerDAO</value>
         </property>
     </bean>



So, basically, what you need to do is identify the bean in the Spring 
config on which you want to set an interceptor. Create an interceptor 
class with the behaviour you want to add, then use a 
BeanNameAutoProxyCreator bean (or other Spring interceptor-related 
candy) to set the interceptors when Spring creates its beans.


Please do not hesitate to contact me if you need more details.

Denis Balazuc


Rapha�l Pi�roni wrote:
> Hi,
> 
> I would like to add a new behaviour just after a weblog entry is saved.
> It seems to me that this should be achieved using spring aop.
> 
> But, i must admit not knowing anything to spring. (but aop
> concepts are known to me - once i played with aspectj)
> 
> Can you please tell me how to do it?
> My only need is to create an after-advice on the
> WeblogManager.saveWeblogEntry(entry) method.
> 
> Many thanks in advance for any help.
> 
> Regards,
> 
> 
> Rapha�l
> 
> 
> 
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