Newbie - NoClassDefFound POJO

[raja05]

Im trying to run the first example from the Oreilly AOP example.
Compiled my classes and run it as

java -Djava.system.class.loader=org.jboss.aop.standalone.SystemClassLoader POJO

Gives me a
Exception in thread main:NoClassDefFoundError: POJO

My class files and java files are both in a

c:\jbossaop\oreilly\examples1 directory and i run it from the same directory. I do set the classpath before this and include "." along with Classpath. Not sure why i get this error.

If i change teh jboss-aop.xml to apply the interceptor to POJO1(Which doesnt exist), i get the "Hello World" output as expected., but if its POJO, i get this error

Help!!

TIA
Raj

[raja05]

Try emailing

[e-mail]

with your original purchase details. They havn't replied to my email on 26th May, but they were fairly good at getting me the April link !

[raja05]

Is there something with the JDK Version? I tried this on jdk1.4.1_02 and got the error i reported earlier

If i set the JAVA_HOME to be jdk1.3.1_07, id ont get any errors but the interceptors dont get applied. Is there a specific VM thats suited for this?

-Raj

[raja05]

Has anyone hd success running this? I definitely cannot run it with JDK1.4.1_02.

As for JDK1.3, the java.system.class.loader cannot be used(not a standard property), so it doesnt use this classloader but uses the standard Classloader and runs my code without running thru the interceptor

[safx]

I keep getting the same problem on WindowsXP, JDK 1.4.2. If I don't set the classloader to the JBoss-specific classloader, I see "Hello World!" printed, but if I try to use the stand alone JBoss AOP class loader, I keep getting NoClassDefFound.

Really strange. It seems as though it would easy to run the examples, but it's been a pain in my a$$.

SAF

[adegbile]

This are the steps carried out in eclipse today and it work fine.

1 Define a new project in my case aop

2 Define the source to the directory of the source based on your installation of the examples in my case example3

3 Add the following to the java build path
javassist.jar
jboss-common.jar
jboss-aop.jar

4 My j2jdk was 1.4.2

5 Add the following to launch you Pojo class VM arguments option
-Djava.system.class.loader=org.jboss.aop.standalone.SystemClassLoader
6 Then run the progarm

Hope this helps

[raja05]

Hi
I tried the same thing except (1) Used IDEA (Which shouldnt matter) and
2) used jdk1.4.1_01, 1.4.1_02 and 1.4.1_03

If possible, can you try if it works on 1.4.1? Has someone made this work on 1.4.1?

Also did you put the classes in a package or did u just use the source from the download? I hvae tried bothways and the result is the same - NoClssDefFound

Ill try it on 1.4.2

Thanks
Raj

[mschoning]

That doesn't work for me. I also use eclipse (2.1) and jdk 1.4.2.

Following those instruction, there is no attempt to load the class POJO.

But if I change the arguments to the vm (step 5) like this:
-Djava.system.class.loader=org.jboss.aop.standalone.SystemClassLoader POJO

Then I get a class not fond on org.jboss.aop.standalone.SystemClassLoader

The only way I was able to resolve that. Was to unpack javassist.jar, jboss-common.jar and jboss-aop.jar
Into my bin directory for the project in eclipse.
(I put my compiled classes in a bin directory under my project i.e. project-directory/bin)

Now it works, not nice but atleast now I can play around JBoss AOP.

good luck, Michael

[mschoning]

I'm sorry I forgot to mention 2 important steps
the classloader I use is :
-Djava.system.class.loader=org.jboss.aop.StandaloneClassLoader POJO

Not the one mentioned in the documentation (i have downlaoded the standalone version for JBoss AOP)

Also I have to set the working directory in eclipse to
my bin directory

I think that's it.

- Michael

[adegbile]

This is the setup on windows that work without an IDE

DirectoryStructure
Orielly-aop\example3\Run.bat

This is the content of the Run.bat

set JAVA_HOME=d:\j2sdk1.4.2
set CPATH=.;jboss-common.jar;jboss-aop.jar;javassist.jar
d:\j2sdk1.4.2\bin\javac -classpath %CPATH% -g *.java

pause

d:\j2sdk1.4.2\bin\java -classpath %CPATH% -Djava.system.class.loader=org.jboss.aop.standalone.SystemClassLoader POJO

pause

The content of the example3 in my case is all the example3 source , extra jar files(jboss-common.jar;jboss-aop.jar;javassist.jar) and a subdirectory Meta-inf which contains jboss-aop.xml

Regards
Adeyemi E Adegbile

[adegbile]

Hi Raj,

Check that you are running the correct example. There are currently three examples
one
two
three.
Each have different configuration and code.

I have just retested all the examples and they are working as I described earlier.
Based on the output you described, it seems as if you are running example one.

Kind Regards
Adeyemi E Adegbile

[guest55]

I've found that JBoss AOP requires trove.jar to be present on classpath. Otherwise it throws noclassfound error. After adding it to classpath all examples start working.

[raja05]

Yeah, thats it. I just got it working, Thanks guest55