EJB + CORBA problems

Question

Hi there,
I've got some code (EJB) which connect
me to OLAPService on my 9i Oracle server. I deployed it to Oracle AS which
is istalled on another machine. Then I wrote client application which has to
connect to OAS and invoke EJB method to connect to OLAPService.
The connection to EJB was successfully established (of course through a
CORBA). But when EJB was trying to connect to Oracle9i I got such error :
javax.naming.NameNotFoundException:
sess_iiop://<server_ip>:<port>:<sid>/etc/OLAPServer/OLAPServer not found
I think it something wrong with my OAS enviroment. I have tried to do my best , but still nothing .... ( I am sure that everything else is OK, because I tried to make connection through
JDBC to relational database and it worked fine).
When I'm starting EJB's code as client application everything is OK. The
connection to OLAPService is established every time. When I modyfied code
for EJB (commenting code responsible for preparing InitailContextEnviroment
and connecting to OLAPService) everything was OK. So :
1) I can connect and invoke EJB's method deployed to OAS,
2) I can connect to Oracle9i OLAPService and use OLAPAPI methods,
3) I can't do it when I try to connect to OLAPService through the OAS (where
is EJB)
client_application (java) ===CORBA===> OAS ( EJB with OLAPAPI) ==CORBA==>
OLAPService
This is the EJB's method code ( when it is calling as client application it
works!!!!):
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
import org.omg.CORBA.Object;
import oracle.aurora.jndi.sess_iiop.ServiceCtx;
import oracle.express.connection.Connection;
import oracle.express.connection.ConnectionManager;
import javax.naming.Context;
import javax.naming.InitialContext;
import java.util.*;
public String Polaczenie()
String serviceURL="sess_iiop://<server_ip>:<port>:<sid>";
String objectName="/etc/OLAPServer/OLAPServer";
Hashtable env=new Hashtable();
env.put(Context.URL_PKG_PREFIXES,"oracle.aurora.jndi");
env.put(Context.SECURITY_PRINCIPAL,<user>);
env.put(Context.SECURITY_CREDENTIALS,<password>);
env.put(Context.SECURITY_AUTHENTICATION,ServiceCtx.NON_SSL_LOGIN);
try
Context ic=new InitialContext(env);
org.omg.CORBA.Object
ServiceStub=(org.omg.CORBA.Object)(ic.lookup(serviceURL+objectName));
Properties connParams = new Properties();
connParams.put("UserID",<user>);
connParams.put("Password",<password>);
ConnectionManager cm=ConnectionManager.init();
Connection conn=
cm.connect((org.omg.CORBA.Object)ServiceStub,connParams);
conn.close();
catch(Exception e)
return "\nError:" + e + "\n";
return "\nIt works\n";
This is client's code:
public static void main(String[] args)
try {
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
"com.evermind.server.rmi.RMIInitialContextFactory");
env.put(Context.PROVIDER_URL, "ormi://sasza/SerwerEjb");
env.put(Context.SECURITY_PRINCIPAL, "admin");
env.put(Context.SECURITY_CREDENTIALS, "oracle");
Context context = new
com.evermind.server.rmi.RMIInitialContextFactory().getInitialContext(env);
Object homeObject = context.lookup("<myEJBName>");
SerwerEjbHome home = (SerwerEjbHome)
PortableRemoteObject.narrow(homeObject, pakiet.SerwerEjbHome.class);
SerwerEjb remote = home.create();
System.out.println(remote.Polaczenie()); <------------------ there is
error !!!!!!!!!!!!!!!!!! ------------------>
catch(Exception e)
System.err.println("Error: " + e + ":::" + e.getMessage());
Any idea ??
Thank you in advance.

Answer 1

"Taesun, An" <[email protected]> writes:
Thanks for your concern !Its my code - I should be concerned :)
I have successfuly tested the sample program that you attached.
and I have some more questions.Great!
Q1) Can I use idl files generated by weblogic.ejbc on the other ORB like as
orbix, etc..?Yes. But the problem is that Orbix is known to have problems with the
codeset that we send out. For silversword we are doing a GIOP 1.2
implementation a by-product of which will be that we have to do some
form of codeset negotiation, so hopefully these issues will be sorted
in the near future.
And I know that the Client.cpp program you sent differs from original source
code in the respects which is including TradeResultFactory and
TradeResultImpl classes.
Q2) If so, Do i have to implement the above classes for all of call by value
parameters or return type ?You have to write some C++ code for any valuetypes that you use. This
basically means any non-primitive object that is not a remote
interface and implements serializable.
I wanna know for the needed classes how to easily get generated or the other
solutions.I attach the entity bean example I cooked up which shows you how you
can use C++ macros to take away some of this pain. Note that you cannot make the finder method work with 6.0SP2. This will be fixed in 6.1
[generic_idl_entity.zip]
I got error message following as, when i used "-idlFactories" of
weblogic.ejbc option to generate Factory definition.
Usage: java weblogic.rmic [options] <classes>...
option descriptions ,.,........
option descriptions ,.,........
ERROR: Error from ejbc: Unrecognized option or flag, -idlFactories
ERROR: ejbc found errors
make: *** [ejbc] Error 1Hmm, you are right. It looks like the option didn't get inverted in
rmic. The attached class file should fix this.
[IDLGeneratorOptions.class]
andy