Java Applets connecting to Oracle DB thru OAS (JNDI)

Question

i am developing an application, like i said before, i am using three applets, one controls a webcam, (records an image to disk and oracle), another controls a Electronic signature pad (records an image to disk and oracle), and finally a finger print reader (the same with this), at the beginning i didnt have any problem at all connecting this applet to the database, but top management wants to do things in another way, not allowing me to connect the applet directly to the database for security reason, My app resides on Oracle Application Server, and i use DataSource and Connection Pooling,
I want that this applets use the available datasource on OAS to connect to the Database, due that the DataBase IP Address wont be public but OAS IP address will, I know that i must use JNDI to accomplish this, but i didnt have any results at all
Message was edited by:
efebo_abel2002

Answer 1

i retrieved all the datasources from my app and i got this, i show my code and the returned errors, I can't connect my applet to the DB thru OAS datasources, any suggestions?
package rdf.struts.ajax;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NameClassPair;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.sql.DataSource;
public class ConductoresClient2 {
public static void main(String [] args) {
try {
final Context ctx = getInitialContext();
System.out.println(ctx!=null?"ctx no es null":"ctx es null");
NamingEnumeration nenum=ctx.list("jdbc");
while (nenum.hasMore()) {               
NameClassPair entry = (NameClassPair)nenum.next();
System.out.println("entry:="+entry.getName());
try {
DataSource ds=(DataSource)ctx.lookup("jdbc/"+entry.getName());
Connection conn=ds.getConnection();
Statement stm=conn.createStatement();
ResultSet rs=stm.executeQuery("SELECT * FROM palic_ow.conductores");
while(rs.next())
System.out.println("rs.getString(1):="+rs.getString(1));
System.out.println("rs.getString(2):="+rs.getString(2));
System.out.println("rs.getString(3):="+rs.getString(3));
catch (Exception e) {
System.out.println("Exception conectando a la base :"+e);
//java:comp/env/
}catch (Exception e) {
System.out.println("Exception obteniendo Context "+e);
private static Context getInitialContext() throws NamingException {
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,"oracle.j2ee.rmi.RMIInitialContextFactory");
env.put(Context.SECURITY_PRINCIPAL,"oc4jadmin");
env.put(Context.SECURITY_CREDENTIALS,"admin");
env.put(Context.PROVIDER_URL,"ormi://localhost:23791/sertracen");
return new InitialContext( env );
ctx no es null
entry:=OracleDS
Exception conectando a la base :javax.naming.NamingException: Lookup error: javax.naming.NamingException: javax/resource/Referenceable [Root exception is java.lang.NoClassDefFoundError: javax/resource/Referenceable]; nested exception is:
     javax.naming.NamingException: javax/resource/Referenceable [Root exception is java.lang.NoClassDefFoundError: javax/resource/Referenceable] [Root exception is javax.naming.NamingException: javax/resource/Referenceable [Root exception is java.lang.NoClassDefFoundError: javax/resource/Referenceable]]
entry:=v8PooledDS
Exception conectando a la base :javax.naming.NamingException: Disconnected: java.lang.NoClassDefFoundError: javax/resource/Referenceable
entry:=caom
Exception conectando a la base :javax.naming.NamingException: Lookup error: javax.naming.NamingException: javax/resource/Referenceable [Root exception is java.lang.NoClassDefFoundError: javax/resource/Referenceable]; nested exception is:
     javax.naming.NamingException: javax/resource/Referenceable [Root exception is java.lang.NoClassDefFoundError: javax/resource/Referenceable] [Root exception is javax.naming.NamingException: javax/resource/Referenceable [Root exception is java.lang.NoClassDefFoundError: javax/resource/Referenceable]]
entry:=v8DS
Exception conectando a la base :javax.naming.NamingException: Lookup error: javax.naming.NamingException: javax/resource/Referenceable [Root exception is java.lang.NoClassDefFoundError: javax/resource/Referenceable]; nested exception is:
     javax.naming.NamingException: javax/resource/Referenceable [Root exception is java.lang.NoClassDefFoundError: javax/resource/Referenceable] [Root exception is javax.naming.NamingException: javax/resource/Referenceable [Root exception is java.lang.NoClassDefFoundError: javax/resource/Referenceable]]
entry:=v8CoreDS
Exception conectando a la base :javax.naming.NamingException: Lookup error: javax.naming.NamingException: javax/resource/Referenceable [Root exception is java.lang.NoClassDefFoundError: javax/resource/Referenceable]; nested exception is:
     javax.naming.NamingException: javax/resource/Referenceable [Root exception is java.lang.NoClassDefFoundError: javax/resource/Referenceable] [Root exception is javax.naming.NamingException: javax/resource/Referenceable [Root exception is java.lang.NoClassDefFoundError: javax/resource/Referenceable]]
Process exited with exit code 0.
null