Session Bean Call crashes on caller (programatically) change

[ragnarokkrr]

Hi there.

I have one problem. When I call a Session Stateless from a Servlet (I have an application deployed with ANT/XDoclet in a jboss-3.0.3_tomcat-4.1.12 bundle) that´s ok, everything seems to be working fine.

But when I change the call from the servlet to a helper class(i´m using the Command Pattern) I get an Exception, like jboss couldn´t find the Home Object.
The Session Bean call from the UsuarioControllerServlet passed to UsuarioListCommand (the Command Pattern class).
I don´t know if it´s a <ejb-ref> problem, but i guess that only Servlets need <ejb-ref> in web.xml.

The Session Bean is called, in all allternatives, through a Business Delegate class (UsuarioDelegate).

The call:

servlet -> Business Delegate -> Session Beans

Works pretty fine. BUT the call:

servlet -> Command Pattern Class -> Business Delegate -> Session Beans

crashes.

If anyone passed through a similar problem, please answer me.

Thanks in advance.


the Exception:
----------------------------------------------------------
java.lang.ClassCastException
at com.sun.corba.se.internal.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:293)
at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:134)
at AgendaBusiness.ServiceLocator.getHome(ServiceLocator.java:82)
at AgendaBusiness.UsuarioDelegate.(UsuarioDelegate.java:23)
at AgendaPresentation.cadastrarusuarios.UsuarioListCommand.execute(UsuarioListCommand.java:26)
at AgendaPresentation.cadastrarusuarios.UsuarioControllerServlet.processRequest(UsuarioControllerServlet.java:62)
at AgendaPresentation.cadastrarusuarios.UsuarioControllerServlet.doGet(UsuarioControllerServlet.java:80)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:469)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1040)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1151)
at java.lang.Thread.run(Thread.java:536)

[juha]

Try using regular Java cast rather than PortableRemoteObject.narrow() and see if that helps in your problem.

[ragnarokkrr]

could you please explain how could I do that? I think that the ProtableRemoteObject.narrow() is needed to link the HomeObject to the remote interface and stablish the stub/skeleton RMI connection.

thanks.

[ragnarokkrr]

test

[ragnarokkrr]

Sorry but I didnt understand what did you mean. I think that PoratableRemoteObject.narrow() is needed to link the remote interface to home objects, and provide the RMI connection between the stubs and skeletons.

How could I do a simple cast in susbtstitition of the narrowing? Could you please post me an example?

[juha]

SomeBeanHome home = (SomeBeanHome)namingContext.lookup("java:comp/env/blahblahblah");