No class definition Error.

[sudhabalu]

Dear All,

     We are using a class to compress/decompress data and we put it in a seperate jar. From the ejb class we'll access that class. Using jboss 7.1.1 i have loaded the compress class jar as global module. But from bean class am getting the below error.

11:04:20,638 INFO  [stdout] (http-127.0.0.1-127.0.0.1-8080-1) Exception raised in decompress() :java.lang.ClassNotFoundException: lrp.documentation.booking.shared.vo.Booking from [Module "solverminds.compress.compressapi:main" from local module loader @94884d (roots: E:\jboss-as-7.1.1.Final\modules)]

11:04:20,643 ERROR [stderr] (http-127.0.0.1-127.0.0.1-8080-1) java.lang.ClassNotFoundException: lrp.documentation.booking.shared.vo.Booking from [Module "solverminds.compress.compressapi:main" from local module loader @94884d (roots: E:\jboss-as-7.1.1.Final\modules)]

Is it possible to access bean class from modules?

THanks

[sfcoy]

Accessing application classes from a module is tricky if they are not passed into the module as arguments.

It would be simpler to bundle your EJB jar in an EAR file and add your compression library as a jar to the EAR/lib directory.

[sudhabalu]

Thanks for your reply. I have already tried to add compression library to the EAR/lib. But that doesn't work Still getting same exception

[sfcoy]

You need to add a classpath manifest entry in the compression lib with the name of the ejb jar, or configure the EAR classloading as described in Class Loading in AS7.

[sudhabalu]

I did the followings.

1.Added the ejb jar name in the classpath manifest entry of compression lib

2.Set ear-subdeployments-isolated to false

But no luck. Still couldn't solve the problem.

[nickarls]

What is the error message with all stuff in ear/lib and isolation=false? Is it jar -> jar reference within the ear or is there any jar -> war access?

[sudhabalu]

Compression stuff is defined as module and loaded the same in standalone-full.xml as shown below.

             <global-modules>              

                <module name="solverminds.compress.compressapi" slot="main"/>

            </global-modules>

From my bean/servlet used to call compress api to compress/decompress data. 

lrp.documentation.booking.shared.vo.Booking object = (lrp.documentation.booking.shared.vo.Booking)cmp.decompress(compressedData);

Its showing the mentioned error in the above line.

[nickarls]

Can you raise log levels so you can see that the module is actually is well-defined and picked up?

[sudhabalu]

ok. But its my error.

11:04:20,638 INFO  [stdout] (http-127.0.0.1-127.0.0.1-8080-1) Exception raised in decompress() :java.lang.ClassNotFoundException: lrp.documentation.booking.shared.vo.Booking from [Module "solverminds.compress.compressapi:main" from local module loader @94884d (roots: E:\jboss-as-7.1.1.Final\modules)]

Its showing lrp.documentation.booking.shared.vo.Booking class is not found in compress API.

[sfcoy]

I think Sudha is directly referencing a class defined in his application from his module. I don't think you can do that without passing a classloader to the module.

Which is why I suggested the EAR solution.

Sudha, What did your manifest classpath entry look like? I would expect to see something like:

Class-Path: ../your-ejb.jar

[sudhabalu]

i Just added like this.

Class-Path: ejbjarname.jar

I added this manifest entry in the compress library jar's which is loaded as module.

[sfcoy]

If you have code like:

{code:java}lrp.documentation.booking.shared.vo.Booking object = (lrp.documentation.booking.shared.vo.Booking)cmp.decompress(compressedData);{code}

in your module and the class lrp.documentation.booking.shared.vo.Booking is defined in your ejb jar then you will have classloading problems.

Put everything together in an EAR file.

[nickarls]

Why would the compression module (as in AS module in the modules dir) need to reference the code in the EAR/EJB?

One would think that you either would have the compression lib and the code using it in the same EAR or the compression stuff in a module and then just referenced from the applications.

Or am I missing something here?

[sudhabalu]

No am not having that code in my module. In compress API all operations done as object.

That code i have used in my servlet.

I am just passing some object to compress API to decompress the same.

[nickarls]

So you now have have an EAR. In that EAR you have a WAR. In that WAR you have a servlet class which references a class that is packed in a JAR and placed in the lib folder of the beforementioned EAR?