Logging help

[parasjain01]

Hi,
I am trying to implement logging in my project. I have used example from
http://www.devx.com/Java/Article/30799/0/page/2 but it is not working. Application works fine and does not throw any exception. But the logging is not happenig
I have carefully read some tutorials but I am not able to solve this problem.

Can someone tell me where am I wrong?

Here are my code snippets
applicationContext.xml

<bean id="AbcServiceBean" class="org.springframework.aop.framework.ProxyFactoryBean">
			              <property name="proxyInterfaces">
                          	<value>com.logic.GenericDAO</value>
                          </property>
		<property name="target">
			<ref bean="AbcDAO"/>
		</property>
		<property name="interceptorNames">
			<list>				
				<value>loggingInterceptor</value>
			</list>
		</property>		
</bean>	

<bean id="AbcDAO" class="com.logic.AbcDAO">
	<property name="sessionFactory"><ref bean="hibernateSessionFactory" /></property>
</bean>
<bean id="loggingInterceptor"  class="com.web.LoggingInterceptor"/>	
</beans>

AbcDAO

public class AbcDAO extends HibernateDaoSupport implements GenericDAO {

.....
....
some business methods
....
....

}

GenericDAO

public interface GenericDAO {

}

Logging interceptor it is basically exactly the same as given in the tutorial

public class LoggingInterceptor implements MethodBeforeAdvice,
        AfterReturningAdvice, ThrowsAdvice {
    private static Logger log = null;
    public LoggingInterceptor(){
    }
    
    public void before(Method arg0, Object[] arg1, Object arg2) throws Throwable {
        log = Logger.getLogger(arg2.getClass());
        log.info("Beginning method: "+arg0.getName());
    }
    
    public void afterReturning(Object arg0, Method arg1, Object[] arg2, Object arg3) throws Throwable {     
        log = Logger.getLogger(arg3.getClass());
        log.info("Ending method: "+arg1.getName());     
    }
    
    public void afterThrowing(Method m, Object[] args, Object target, Throwable ex) 
    { 
        log = Logger.getLogger(target.getClass());
        log.info("Exception in method: "+m.getName()+" Exception is: "+ex.getMessage());    
    }

}

[mpetrashev]

Am I right that GenericDAO interface doesn't have any method? In this case LoggingInterceptor will intercept nothing...

[parasjain01]

Even when I update the interface to

public Map enroll(AbcUser abcUser);

it is not working.

When the enroll method of AbcDAO is called then the logging module is not hit.

[karldmoore]

Is it possible to see the code you are using to test this? There are a couple of common causes for this, #1 you are creating your bean using the new operator instead of looking it up, #2 you are looking up the wrong bean, instead of looking up the proxy e.g. 'AbcServiceBean' you are looking up 'AbcDAO'.

[parasjain01]

You guys are great. Probably here I am making some mistake. But I don't know how to correct it because I have not much experience in Spring. We use Spring just for little bit IoC etc

I cannot put the full code here. But I am doing something like this

AbcDAO dao = (AbcDAO) webCtx.getBean("AbcDAO");

I think I should do something like

(ProxyFactoryBean)webCtx.getBean("AbcServiceBean")

But then how to extract AbcDao from it?

[mpetrashev]

Can you try

GenericDAO dao = (GenericDAO) webCtx.getBean("AbcServiceBean");
System.out.println( dao.enroll( <some your user instance> ) );

[karldmoore]

The code you've posted is correct, but the cast is actually to the type rather than the proxy. If you were programming to interfaces then you could simply cast to that type, if you're not then you need to set proxyTargetClass="true" on ProxyFactoryBean and cast to the concrete type.
http://www.springframework.org/docs/...l#aop-proxying

[parasjain01]

Thanks a ton to karldmoore and mpetrashev

[blust1984]

You guys are great. Probably here I am making some mistake. But I don't know how to correct it because I have not much experience in Spring. We use Spring just for little bit IoC etc

I cannot put the full code here. But I am doing something like this

AbcDAO dao = (AbcDAO) webCtx.getBean("AbcDAO");

I think I should do something like

(ProxyFactoryBean)webCtx.getBean("AbcServiceBean")

But then how to extract AbcDao from it?

Hello, I am also new in Spring AOP, I just wanna ask is the code

AbcDAO dao = (AbcDAO) webCtx.getBean("AbcDAO");

and

(ProxyFactoryBean)webCtx.getBean("AbcServiceBean")

in a controller in order to get the logging info for a application??? Or my question is where I should put the above two code in my spring application in order to get the logging infor?? Where I should active the logging task, how to active? by call a URL which mapped to a controller, then controller active the logging event or what?Thanks

[karldmoore]

in a controller in order to get the logging info for a application??? Or my question is where I should put the above two code in my spring application in order to get the logging infor?? Where I should active the logging task, how to active? by call a URL which mapped to a controller, then controller active the logging event or what?Thanks

I'm not exactly sure about the question. Any chance you can explain a little more about what you're not sure about?