@EnableLoadTimeWeaving is not working? but <context:load-time-weaver /> is worked!.

I use Spring 3.2.0.

1. <context:load-time-weaver> and AspectJ is worked

-- XML configuration

Code:

---

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

        <context:load-time-weaver />
       
        <bean id="readArticleService" class="sp32.board.service.ReadArticleServiceImpl" />
...

---

-- META-INF/aop.xml

Code:

---

<aspectj>
        <weaver>
                <include within="sp32.board.service.*" />
                <include within="sp32.aop.annot.*" />
        </weaver>

        <aspects>
                <aspect name="sp32.aop.annot.ProfilingAspect" />
        </aspects>
</aspectj>

---

-- ProfilingAspect class

Code:

---

@Aspect
public class ProfilingAspect {

        @Pointcut("execution(public * sp32.board..*(..))")
        private void profileTarget() {}
       
        @Around("profileTarget()")
        public Object trace(ProceedingJoinPoint joinPoint) throws Throwable {
                String signatureString = joinPoint.getSignature().toShortString();
                System.out.println(signatureString + " started");
                long start = System.currentTimeMillis();
                try {
                        Object result = joinPoint.proceed();
                        return result;
                } finally {
                        long finish = System.currentTimeMillis();
                        System.out.println(signatureString + " finished");
                        System.out.println(signatureString + " running time : " + (finish - start)
                                        + "ms");
                }
        }
}

---

-- Main class

Code:

---

public class MainLTW {

        public static void main(String[] args) throws ArticleNotFoundException {
                String[] configLocations = new String[] { "classpath:/acLTW.xml" };
                ApplicationContext context = new GenericXmlApplicationContext(
                                configLocations);

                ReadArticleService readArticleService = new ReadArticleServiceImpl();
                readArticleService.getArticleAndIncreaseReadCount(10);
               
                WriteArticleService writeArticleService = context.getBean(
                                "writeArticleService", WriteArticleService.class);
                writeArticleService.write(new Article());
                ...

---

-- run
java -javaagent:spring-instrument-3.2.0.RELEASE.jar sp32.MainLTW

-- result
successfully weave Aspect into *ArticleService.



2. @EnableLoadTimeWeaving and AspectJ is not worked

-- @Configuration spring config

Code:

---

@Configuration
@EnableLoadTimeWeaving(aspectjWeaving = AspectJWeaving.ENABLED)
public class SpringConfig {
       
        @Bean
        public ReadArticleServiceImpl articleService() {
                return new ReadArticleServiceImpl();
        }
....
}

---

-- aop.xml and ProfilingAspect are same as XML configuration

-- Main class

Code:

---

public class MainLTWConfiguration {

        public static void main(String[] args) throws ArticleNotFoundException {
                AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
                context.register(SpringConfig.class);
                context.refresh();

                ReadArticleService readArticleService = new ReadArticleServiceImpl();
                readArticleService.getArticleAndIncreaseReadCount(10);
...

---

-- run
java -javaagent:spring-instrument-3.2.0.RELEASE.jar sp32.MainLTWConfiguration

-- result
does not weave Aspect into *ArticleService.


Let me know how can i weave aspect into spring bean when i use @EnableLoadTimeWeaving !!

Thanks for reading.
BK

Due to the usage of a class instead of xml your classes are already loaded before loadtimeweaving is applied and once a class is loaded it cannot be changed anymore. One thing you could try is to create 2 config classes one with @EnableLoadTimeWeaving and one with the bean definitions. Then make sure the @EnableLoadtimeWeaving one is loaded first.