How I can use Java Reflection API within EJB 3 entity? - reflection

Question

I do the following steps with eclipse 3.5 ,JBoss 4.2 ,EJB3 but I face class not found exception
1.compiling this code to foo.jar file
package mypackage.foo;
import myejbpackage.ejb.fooInterface;
class foo implements fooInterface{
#override
void helloWorld(){System.out.print("HelloWorld");}
}
Note that fooInterface interface in is written inside the used EJB
2.using reflection , I take an instance from this class, also with the same ejb
package myejbpackage.ejb;
class fooCaller{
void call(){
Class foo= Class.forName("mypackage.foo.foo");
fooInterface iDataBackupWriter =(fooInterface) foo.newInstance();
fooInterface.helloWorld();
}
}
3.then calling it within stateless ejb3
package myejbpackage.ejb;
test(){
System.Out.Write("before calling");
new fooCaller().call();
}
4.then deploying to Jboss 4.2 and and puting foo.jar in default/lib
5.then calling the ejb 3 method.using simple client
it print :
"before calling"
and the following exception occurs in eclipse console
javax.ejb.EJBException: java.lang.RuntimeException: java.lang.NoClassDefFoundError: myejbpackage/ejb/fooInterface; nested exception is: java.lang.RuntimeException: java.lang.NoClassDefFoundError: myejbpackage/ejb/fooInterface
java.lang.RuntimeException: java.lang.NoClassDefFoundError:myejbpackage/ejb/fooInterface
Any suggestion ?
1.Is this exception from JBOOS, why ?
1.Where I should put the foo.jar to bee seen with the ejb3 jar ?
thanks in advance

Answer 1

there was a circular dependency which generate this problem