JavaStoredProcedure as RMI client

Question

Hello,
please can you help me with the following problem ?
I made RMI server object, which runs on a remote machine.
I call this object from a java stored procedure on 8.1.7 DB. It works fine, but when the server object throws some exception (some standard or exception defined by myself), the following exception occurs in the stored procedure, but If I call the RMI object from my standalone client, the exception is correctly thrown and I can catch it in the client... Isn't it some security problem on the DB side ?
java.lang.NullPointerException
at sun.rmi.server.LoaderHandler$LoaderKey.<init>(LoaderHandler.java)
at sun.rmi.server.LoaderHandler.lookupLoader(LoaderHandler.java)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java)
at sun.rmi.server.MarshalInputStream.resolveClass(MarshalInputStream.java)
at java.io.ObjectInputStream.inputClassDescriptor(ObjectInputStream.java)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java)
at java.io.ObjectInputStream.inputArray(ObjectInputStream.java)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java)
Long postings are being truncated to ~1 kB at this time.

Answer 1

I have created a JAVA STORED PROCEDURE !
package com.etisalat.psm.appserver;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;
import com.etisalat.psm.appserver.PSMNotification;
import com.etisalat.psm.appserver.PSMNotificationHome;
import javax.naming.NamingException;
public class PSMNotificationClient
public static String callPSMRule(String type,String id,String code,int version) {
     String returnValue = "Coool";
try {
Context context = getInitialContext();
PSMNotificationHome pSMNotificationHome = (PSMNotificationHome)PortableRemoteObject.narrow(context.lookup("PSMNotification"), PSMNotificationHome.class);
PSMNotification pSMNotification;
pSMNotification = pSMNotificationHome.create();
pSMNotification.callPSMRule(type,id,code,version);
}catch(Throwable ex){
     returnValue = ex.getMessage();
ex.printStackTrace();
     return returnValue;
private static Context getInitialContext() throws NamingException {
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, "welcome");
env.put(Context.PROVIDER_URL, "ormi://10.99.25.217:23891/current-workspace-app");
return new InitialContext(env);
loadjava -u owf_mgr/[email protected]:1529:cbcm -v -r -t ejb.jar
loadjava -u owf_mgr/[email protected]:1529:cbcm -v -t oc4jclient.jar
loadjava -u owf_mgr/[email protected]:1529:cbcm -v -r -t PSMNotification.java
EXECUTION in SQLPLUS*
SQL> create or replace FUNCTION PSMNotificationClient(type VARCHAR2,id VARCHAR2,code VARCHAR2,version NUMBER) RETURN VARCHAR2 as language java name 'com.etisalat.psm.appserver.PSMNotificationClient.callPSMRule(java.lang.String,java.lang.String,java.lang.String,int) return java.lang.String';
SQL> variable str VARCHAR2(1000);
SQL> call PSMNotificationClient('SERVICE','ID','CODE',1) into :str;
Call completed.
SQL> print str;
STR
Cannot instantiate class: com.evermind.server.rmi.RMIInitialContextFactory
After execution we get RMIInitialContextFactory, why is this ?