LTW + Spring

[joni.loky]

Hi, I'm trying to use Load-Time Weaving with spring but I just can't get it to work.

this is my META-INF/aop.xml file:

<aspectj>

<weaver>

<!-- only weave the following classes -->
<include within="ar.mycompany.cda..*"/>

</weaver>

<aspects>

<!-- weave in just this aspect -->
<aspect name="ar.mycompany.cda.aop.LoadTimeWeaving"/>

</aspects>
</aspectj>

this is my aspect:

package ar.mycompany.cda.aop;

import org.apache.log4j.Logger;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;

@Aspect
public class LoadTimeWeaving {

Logger logger;

@Before("loggeoCDA()")
public void logBefore(JoinPoint jp){
logger = Logger.getLogger(jp.getTarget().getClass());
logger.debug("INICIO: " + obtenerFirmaCompleta(jp));
}

@After("loggeoCDA()")
public void logAfter(JoinPoint jp){
logger = Logger.getLogger(jp.getTarget().getClass());
logger.debug("FIN: " + obtenerFirmaCompleta(jp));
}

@Pointcut("execution(* ar.mycompany.cda..*.*(..))")
public void loggeoCDA(){}

private String obtenerFirmaCompleta(JoinPoint jpoint){
StringBuffer buffer = new StringBuffer();
buffer.append(jpoint.getTarget().getClass().getSim pleName() + "." + jpoint.getSignature().getName() + "(");

Object[] args = jpoint.getArgs();
for (int i = 0; i < args.length; i++) {
Object arg = args[i];
buffer.append(arg.getClass().getSimpleName()+" arg"+i);
if (i+1<args.length){
buffer.append(", ");
}
}
buffer.append(")");
return buffer.toString();
}
}

and finally this is my spring-beans.xml config:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schem...-beans-2.5.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schem...ng-aop-2.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"
default-autowire="byName">

<import resource="spring-persistence.xml"/>
<import resource="spring-dao.xml"/>
<import resource="spring-service.xml"/>
<import resource="spring-view.xml"/>

<!-- ******************* LTW ******************* -->
<context:load-time-weaver/>
<bean name="loadTimeWeaving" class="ar.mycompany.cda.aop.LoadTimeWeaving" scope="prototype"/>
<!-- ******************* LTW ******************* -->


<!-- ****************** BEANS ******************-->
<bean name="recurso" class="ar.mycompany.cda.modelo.beans.Recurso" scope="prototype"/>
<bean name="distribucion" class="ar.mycompany.cda.modelo.beans.Distribucion" scope="prototype"/>
<bean name="incurrido" class="ar.mycompany.cda.modelo.beans.Incurrido" scope="prototype"/>
<bean name="asignacion" class="ar.mycompany.cda.modelo.beans.Asignacion" scope="prototype"/>
<bean name="tareaEstimador" class="ar.mycompany.cda.modelo.beans.TareaEstimado r" scope="prototype"/>
<bean name="tarea" class="ar.mycompany.cda.modelo.beans.Tarea" scope="prototype"/>
<bean name="peticion" class="ar.mycompany.cda.modelo.beans.Peticion" scope="prototype"/>
<bean name="proyecto" class="ar.mycompany.cda.modelo.beans.Proyecto" scope="prototype"/>
<bean name="tecnologia" class="ar.mycompany.cda.modelo.beans.Tecnologia" scope="prototype"/>



</beans>

I'm setting the -javaagent:C:/Spring-Agent/spring-agent.jar as a VM parameter. The app runs as if nothing happened. I know the <context:load-time-weaver/> tag is being noticed because if i don't specify the -javaagent param for the VM I get an exception.

Did I miss something configuring LTW? I'm using JAVA 5.

[joni.loky]

FIXED IT!.....THE F****** META-INF folder needed to be in my src/main/java folder. I had it at the same level as src.

[djemgo]

Hello all,
I have the same problem now with LTW.
I’m having the exception “org.aspectj.lang.NoAspectBoundException”



My aop.xml:
<aspectj>

<weaver>

<!-- only weave the following classes -->
<include within="com.my.app..*"/>

</weaver>

<aspects>

<!-- weave in just this aspect -->
<aspect name="com.my.app.aop.logging.LoggingService"/>

</aspects>
</aspectj>



My Aspect:
package com.my.app.aop.logging;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;

/**
* Logging Aspect
*/
@Aspect
public class LoggingService {
private static Log log = LogFactory.getLog(LoggingService.class

@AfterReturning(value = "namegenerator()", returning = "retVal")
public void afterReturning(final Object retVal) throws Throwable {
log.info("After returning Advice runing");

}

@AfterThrowing(pointcut = "namegenerator()", throwing = "exception")
public void afterThrowing(final JoinPoint jp, final Throwable exception) {
log.error("Exception:" + exception.getStackTrace(), exception);
}

@Before("namegenerator()")
public void before(JoinPoint jp) throws Throwable {
log.info("Before Advice runing ");
}

@Pointcut(value = "within(de.hhla.tzs..*)", argNames = "s,o")
public void namegenerator() {
}

}

Context file:

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schem...-beans-2.5.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd">

<context:load-time-weaver/>
<bean id="loggingService" class="com.my.app.aop.logging.LoggingService" scope="prototype"/>

<bean id="generator" class="com.my.app.GeneratorFichier">
</bean>
</beans>

I can’t figure out what I’m doing wrong. As stated I’m getting the Exception:

“org.aspectj.lang.NoAspectBoundException: com.my.app.aop.logging.LoggingService”

Please help,

djemgo

[Marten Deinum]

You are using loadtimeweaving, so don't specify your aspect in the applicationContext.xml file.

Also use [ code][/code ] tags when posting code!!!!

[joni.loky]

THNX...actually it was left overs from when I was trying to use CGLIB proxys

[spiff]

FIXED IT!.....THE F****** META-INF folder needed to be in my src/main/java folder. I had it at the same level as src.

I suppose you're using Maven2, in which case you should put the META-INF folder under src/main/resources with all other resource files; src/main/java should only contain Java source files. The final JAR / WAR artifact will be the same.

Cheers,
GB

[joni.loky]

Thanks spiff. Hey, is there a way to specify a different folder for my aop.xml file?

[spiff]

Hey, is there a way to specify a different folder for my aop.xml file?

You can use the org.aspectj.weaver.loadtime.configuration system property to specify the path of the load-time weaving configuration files that are read. For example: -Dorg.aspectj.weaver.loadtime.configuration=META-INF/aop1.xml;META-INF/aop2.xml

Cheers,
GB

[djemgo]

Hallo Marten,
thanks a lot for your email.
I've changed my ContextFile according to your email. Ijust removed the declaration of my Aspect bean. I'm still getting exactly the same Exception
I guess there’s another problem somewhere else.
Any help would be welcome.
Djemgo

[joni.loky]

Where should I set that? I tried setting it as a VM parameter in eclipse when I start my tomcat server but nothing happens.