Spring Boot load time weaving doesn't work in embedded tomcat

Question

I can't get LTW to work in Spring Boot 1.2.2 w/ Embedded Tomcat.

My application is a WAR file, not a .JAR file. When I run in DEBUG, it never stops in my aspect even with hitting calls that should match the pointcuts, so that is how I figure it is not working...

My run script does this:

-javaagent:path/to/spring-instrument-xxx.jar -javaagent:path/to/aspectjweaver-1.2.8.jar

In Spring Boot, I load this AOP Config as an ApplicationInitializer, so it is in a parent ApplicationContext right away and should be there for all the rest of my embedded tomcat web application context thereafter.

@EnableLoadTimeWeaving(aspectjWeaving=AspectJWeaving.ENABLED)
@Configuration
public class AopConfig {
    private Log log = LogFactory.getLog(AopConfig.class);

    public AopConfig() {
        log.info("Creating AopConfig");
    }

    @Bean
    public LoadTimeWeaver loadTimeWeaver() {
        log.info("Creating InstrumentationLoadTimeWeaver");
        return new InstrumentationLoadTimeWeaver();
    }
}

My Aspect looks like this:

package my.aop.profiler.MethodTimerAspect;

@Aspect
public class MethodTimerAspect {
    private static final String DELIMITER = "|";
    private static final String PROFILER = "profiler";
    private static final String DATE_FORMAT = "h:mm:ss";
    private static final Log LOG = LogFactory.getLog(PROFILER);

    public MethodTimerAspect() {}

    @Pointcut("execution (* my.web.*Controller.*(..))")
    protected void controllers() {}

    @Pointcut("execution (* my.services..*Facade.*(..))")
    protected void services() {}

    @Pointcut("execution (* my.services..*Exchange.*(..))")
    protected void data() {}

    /**
     * If profiling is enabled with trace, it will log the amount of time
     * spent in the method
     *
     * @param joinPoint
     * @return Object
     * @throws Throwable
     */
    @Around("controllers() || services() || data()")
    public Object doProfiling(ProceedingJoinPoint joinPoint) throws Throwable {
        // (...)
    }
}

My Embedded WAR's META-INF/aop.xml is this:

<!DOCTYPE aspectj PUBLIC "-//AspectJ//DTD//EN" "http://www.eclipse.org/aspectj/dtd/aspectj.dtd">
<aspectj>
    <weaver>
        <!-- only weave classes in our application-specific packages -->
        <include within="cdot.*"/>
    </weaver>
    <aspects>
        <!-- weave in just this aspect -->
        <aspect name="my.aop.profiler.MethodTimerAspect"/>
    </aspects>
</aspectj>

score 0 · Answer 1 · answered Apr 05 '15 at 10:58

Two ideas:

Probably you want to change one of your pointcuts to also find subpackages (use .. syntax instead of .):
```
@Pointcut("execution (* my.web..*Controller.*(..))")
```
The same applies to your aop.xml:
```
<include within="cdot..*"/>
```

I assume that my.web was changed by you deliberately and actually reads cdot.something, because otherwise the pointcuts would not match.

Spring Boot load time weaving doesn't work in embedded tomcat

1 Answers1