Load Time Weaving in Jetty

[anderssv]

According to the new Spring 2.5 docs, the preferred way is to wire in AspectJ with Load Time Weaving is through the spring-agent.jar Java agent option (it used to be aspectj-agent.jar in Spring 2.0 I think).

Running tests etc. through the command line works when I load the spring-agent.jar, but running in Jetty fails. Status messages says AspectJ is loaded, and the configuration files are read. But there is no weaving going on. When I use the aspectj-agent.jar it loads, and this time weaving is performed.

I suspect this has something to do with classloading in Jetty, since the weave is done through load time and classloading. Does anyone with any insight to the classloading have a solution for this? I can probably use the aspectj agent for now, but I prefer to use the Spring documented way.

[Marten Deinum]

Make sure that there is only one spring-agent.jar on your jetty classpath, don't include it on your application but only on the server classpath.

[anderssv]

And now I see there is an approval process. Sorry for the double posting. And this just went through without approval. Might be the link I pasted, the posts will hopefully be approved soon.

[anderssv]

Hjm, my replies doesn't seem to come through.

On the Jetty server nothing gets weaved with the spring-agent.jar, but it runs fine in the tests. The tests run really slow (loading the spring context takes ages) with aspejct-weaver.jar, but at least it weaves in Jetty.

I found a thread on the Jetty list describing others having problems with spring-agent.jar, and using aspectj-weaver instead. I tried pasting the link in previous posts, but think that's why they ended up in moderation, and is not shown here. Search Google for "aspectj jetty spring-agent" to find it.

Any hints on how to debug etc. would be most welcome.

Anders,

[anderssv]

When I enable logging I see that AspectJ loads:

[AspectJ Weaver] (main:) [AspectJ] AspectJ Weaver Version 1.6.0 built on Wednesday Apr 23, 2008 at 20:27:36 GMT                                                                                                                                                                                                     
[AspectJ Weaver] (main:) [AspectJ] register classloader org.mortbay.jetty.webapp.WebAppClassLoader@1ad093c                                                                                                                                                                                                          
[AspectJ Weaver] (main:) [AspectJ] using configuration /C:/workspace/source/trunk/server/target/classes/META-INF/aop.xml                                                                                                                                                                           
[AspectJ Weaver] (main:) [AspectJ] using configuration file:/C:/Documents%20and%20Settings/asv/.m2/repository/efaktura-faktura-register-app/3.0.20/efaktura-faktura-register-app-3.0.20.jar!/META-INF/aop.xml                                                                           
[AspectJ Weaver] (main:) [AspectJ] using configuration file:/C:/Documents%20and%20Settings/asv/.m2/repository/org/springframework/spring-aspects/2.5.4/spring-aspects-2.5.4.jar!/META-INF/aop.xml                                                                                                                   
[AspectJ Weaver] (main:) [AspectJ] using configuration /C:/workspace/source/trunk/processor-web/target/classes/META-INF/aop.xml                                                                                                                                                            
[AspectJ Weaver] (main:) [AspectJ] using configuration /C:/workspace/source/trunk/domain/target/classes/META-INF/aop.xml                                                                                                                                                                           
[AspectJ Weaver] (main:) [AspectJ] using configuration /C:/workspace/source/trunk/processor/target/classes/META-INF/aop.xml                                                                                                                                                                
[AspectJ Weaver] (main:) [AspectJ] using configuration /C:/workspace/source/trunk/overvaakning-uttrekk/target/classes/META-INF/aop.xml                                                                                                                                                             
[AspectJ Weaver] (main:) [AspectJ] register aspect org.springframework.transaction.aspectj.AnnotationTransactionAspect                                                                                                                                                                                              
[AspectJ Weaver] (main:) [AspectJ] not weaving '$Proxy1'                                                                                                                                                                                                                                                            
[AspectJ Weaver] (main:) [AspectJ] not weaving '$Proxy7'                                                                                                                                                                                                                                                            
[AspectJ Weaver] (timer-OvUt:) [AspectJ] not weaving '$Proxy8'                                                                                                                                                                                                                                                      
[AspectJ Weaver] (main:) [AspectJ] not weaving '$Proxy9'                                                                                                                                                                                                                                                            
[AspectJ Weaver] (main:) [AspectJ] not weaving '$Proxy10'

The Not weaving messages makes sense as I still have some proxies in my context, but there's no messages about weaving anything. When I remove the proxy around the classes I want weaved I get less "not weaving proxy" messages, so I am pretty certain it scans the beans I want it to scan.