[jboss-user] [EJB 3.0] - Problem calling SLSBs from isolated EARs

[ferenc.hechler]

Hello,

I am using JBoss 4.0.4GA with EJB3.0 RC 8

I want to deploy an application split into multiple components.
The aim is to be able to redeploy one component without touching the others 
(of course only for unchanged interfaces).
The components communicate using Stateless Session Beans.

With the JBoss flat class-loading model this is not possible, because of
class-loader errors after redeploying one component.

So I decided to use isolated EARs for each component.
Following the tips at 

http://wiki.jboss.org/wiki/Wiki.jsp?page=CommonHurdlesAndDifficultiesYouMayEncounterDuringEJB3Development

I adjusted "conf/jboss-service.xml" and "deploy/ear-deployer.xml" to use 
isolation and CallByValue.
Each EAR has its own loader-repository defined in "META-INF/jboss-app.xml"

I got thinks working as long as the parameters are of simple type (like String).
Even complex types work as long as they are defined outside of the EAR, e.g. 
"HashMap".
I use an simple type defined inside the EAR, like

public class MyType implements Serializable { public String data; }

>From a client java application I can call all methods via the remote interface:

void f(String) -> works
  | void f(HashMap) -> works
  | void f(MyType) -> works

>From iside an SLSB I call another SLSB deployed on the same JBoss in another 
component (which means different EARs and different loader-repositories):

void f(String) -> works
  | void f(HashMap) -> works
  | void f(MyType) -> fails

the following exception is thrown when proxy.f(myType) is called via the local 
interface:

Caused by: java.lang.IllegalArgumentException: Wrong target. class pkg.MyBean for public java.lang.String pkg.MyBean.f(pkg.MyType)
  | 	at org.jboss.aop.joinpoint.MethodInvocation.handleErrors(MethodInvocation.java:141)
  | 	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:116)
  | 	at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
  | 	at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
  | 	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 	at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
  | 	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 	at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
  | 	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 	at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126)
  | 	... 55 more

using the remote interface yields:

Caused by: java.lang.NoClassDefFoundError
  | 	at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:57)
  | 	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 	at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:102)
  | 	at $Proxy138.processDto(Unknown Source)
  | 	at pkg.MyBean.f(MyBean.java:97)
  |     ...

The same problem was mentioned at

http://jboss.com/index.html?module=bb&op=viewtopic&p=3950618


So my final question is:
========================

"Is it possible to call SLSBs from other SLSBs in isolated EARs with user defined Types?"

Best regards,

   feri


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