noclassdef error for spring instrument jar while passing javaagent argument

[narayan_singh]

Hi,
i am trying to do spring LTW.
for this i have enabled following in config xml

<context:spring-configured/>
   <context:load-time-weaver/>
   <aop:aspectj-autoproxy/>

i am passing -javaagent argument to VM, poiniting to org.springframework.instrument-3.0.5.RELEASE.jar

-javaagent:D:\org.springframework.instrument-3.0.5.RELEASE.jar

but i get NoClassDefFoundError while runing application
i use @aspect annotation style coding
my app is simple java application.so i guess there shouldnt be any issue of web server.

please point proper way for spring LTWeaving.
i am able to run aop enabled app untill i dont use DI of pojo's to aspect classes.
but to have DI in my aspect classes i wanted LTW

share ur experience regarding such a senario.
thanks
Narayan

[nicolas.loriente]

Some questions:
- are you trying to use AspectJ instead of Spring AOP?
- What is the class for which you are getting NoClassDefFoundError?
- Are you running a webapp or stand along app?
- Are you running from withing eclipse or maven or other?

[narayan_singh]

hi,
1>i am trying for spring LTW.annotation <context:load-time-weaver/> in config xml is no more there which i guess is not needed in case of spring weaving
2>i get NoClassDefError for main class in spring-instrumentation jar which i pass as -javaagent argument
3>its a standalone j2se app
4>running it with in eclipse only.

if you can explain on when exctaly we need LTW instead of CTW.because using CTW am able to run application perfactly.

thanks
narayan

[nicolas.loriente]

Make sure you have all needed dependencies. It seems you are missing spring-instrument jar.

As per the documentation ( http://static.springsource.org/sprin...rence/aop.html especially section 7.8.4 Load-time weaving with AspectJ in the Spring Framework ):

Required libraries (JARS)
At a minimum you will need the following libraries to use the Spring Framework's support for AspectJ LTW:

spring-aop.jar (version 2.5 or later, plus all mandatory dependencies)

aspectjrt.jar (version 1.5 or later)

aspectjweaver.jar (version 1.5 or later)

If you are using the Spring-provided agent to enable instrumentation, you will also need:

spring-instrument.jar

Make sure you have all those Jars in your classpath.

Regards.