Calling OC4J deployed EJB from Oracle 8.1.7 DB

Question

Hi
I have deployed a Stateless Session Bean to OC4J (9.0.2). The client works fine. The Servlet and JSP works fine.
What I need to do now is call this EJB from PL/SQL , ie call from Database PL/SQL package to wrapper to OC4j EJB.
Trying to get this loaded into Oracle DB we get a class compilation error with the
com.evermind....rmi... class. I do believe this is the OC4J implementation of RMI lookup. Is there a comparable class to load in the DB?
Any ideas how to ??
Tks
Andre
Here is a client sample of calls to the EJB
package SampleWizUpdates;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
import WizUpdates.WizAllocTotals;
import WizUpdates.WizAllocTotalsHome;
import resTotals;
import resSuccess;
import javax.rmi.*;
public class WizAllocTotalsClient2
public static void main(String [] args)
WizAllocTotalsClient2 wizAllocTotalsClient2 = new WizAllocTotalsClient2();
try
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.evermind.server.rmi.RMIInitialContextFactory");
env.put(Context.SECURITY_PRINCIPAL, "admin");
env.put(Context.SECURITY_CREDENTIALS, "manager");
env.put(Context.PROVIDER_URL, "ormi://sdt10645:23791/WizAllocTotals");
Context ctx = new InitialContext(env);
WizAllocTotals totalsBean;
Object homeObject = ctx.lookup("WizAllocTotals");
WizAllocTotalsHome home =
(WizAllocTotalsHome)PortableRemoteObject.narrow(homeObject,
WizAllocTotalsHome.class);
totalsBean = (WizAllocTotals)PortableRemoteObject.narrow(home.create(),
WizAllocTotals.class);
// create new EJB instance
totalsBean = home.create( );
// Call any of the Remote methods below to access the EJB
int operatorId = 1238;
resTotals newRes = new resTotals();
resSuccess newResSucc = new resSuccess();
String newDataBase = "dwz3";
int eventRefNo = 17445291;
int actionNumber = 3;
int allocValue = 125;
totalsBean.setDataBase( newDataBase );
newRes = totalsBean.getOperatorTotals( operatorId, eventRefNo );
System.out.println("Result total 1 is "+newRes.totTransactLimitValue);
System.out.println("Result total 2 is "+newRes.totDailyLimitValue);
System.out.println("Result total 3 is "+newRes.totWeeklyLimitValue);
System.out.println("Result total 4 is "+newRes.totMonthlyLimitValue);
System.out.println("Result total 5 is "+newRes.remDailyLimitValue);
System.out.println("Result total 6 is "+newRes.remWeeklyLimitValue);
System.out.println("Result total 7 is "+newRes.remMonthlyLimitValue);
System.out.println("Result success code is "+newRes.resCode);
System.out.println("Result success message is "+newRes.resMessage);
newRes = totalsBean.setOperatorTotals(operatorId,
eventRefNo,
actionNumber,
allocValue,
"C",
"Testing Reason");
System.out.println("Insert result success code is "+newRes.resCode);
System.out.println("Insert result success message is "+newRes.resMessage);
catch(Throwable ex)
ex.printStackTrace();
}

Answer 1

Hi Andre,
I am using stand-alone OC4J version 9.0.2.0.0 under (SUN) Solaris 7
with JDK 1.3.1 and Oracle DBMS version 8.1.7.4.
I have not yet been able to create a java stored procedure in the
database that directly looks up an EJB deployed to OC4J.
The only two ways I have found to "talk to" an EJB from a java stored
procedure is
1) go through a servlet
2) go through a "remote" object (using RMI)
For the first option, deploy an application to OC4J that contains
your EJBs and a servlet (which acts as the client for the EJBs).
Then, from your java stored procedure, contact the servlet using
the classes in the "java.net" package -- including "URL" and "URLConnection".
For the second option, use the "rmiregistry" to register a remote
object. This remote object acts as the EJB client. The remote object
does not need to be part of an application deployed to OC4J. Then
contact the remote object from your java stored procedure.
Hope this helps.
Good Luck,
Avi.