Accesing an EJB from an Applet

Question

Hello,
I've published my first EJB to Oracle 8i, and when I use a
standalone java application as a client I have no problems.
But when I try to access with an Applet, the Java console shows:
javax.naming.NotContextException:
retvalentin09.cedetel.tel.uva.es:2481:ORCL/test/MyEJBRemote
The code I use to connect to the EJB is the same as in the
standalone application:
Hashtable env = new Hashtable();
System.out.println("Inicializando entorno...");
env.put(Context.URL_PKG_PREFIXES, "oracle.aurora.jndi");
env.put(Context.SECURITY_PRINCIPAL, "valentin");
env.put(Context.SECURITY_CREDENTIALS, "valentin");
env.put(Context.SECURITY_AUTHENTICATION,
ServiceCtx.NON_SSL_LOGIN);
System.out.println("Inicializado");
try{
Context ic = new InitialContext(env);
System.out.println("Contexto inicial creado");
MyEJBHome home = (MyEJBHome)
ic.lookup("sess_iiop://retvalentin09.cedetel.tel.uva.es:2481:ORCL
/test/MyEJBRemote");
System.out.println("Obtenido home Interface");
try{
try{
MyEJBRemote holaBean = home.create(); // create a
bean instance
System.out.println("Obtenida referencia a EJB");
System.out.println("Resultado: "+holaBean.DimeHola());
} catch (java.rmi.RemoteException
RE){System.out.println("Excepcion remota: "+RE);}
}catch (javax.ejb.CreateException
CE){System.out.println("Excepcion de creacion: "+CE);}
}catch (javax.naming.NamingException
nE){System.out.println("Excepcion de nombrado: "+nE);}
System.out.println("Finalizado");
What is going wrong? I use Java Plugin 1.2.2 in the
navigator, perhaps that is the problem.
I've tried to compile the applet in JDeveloper 2.0 with JDK
1.1.7, but the Netscape Communicator throws Security Exceptions
(I think the JVM of the navigator is 1.1.5), and it happens the
same with Internet Explorer.
I've tried to compile the applet in JDevelper 2.0 whit JDK 1.2,
and in both Communicator and Explorer the Java Console shows this
messages:
Java(TM) Plug-in: Version 1.2.2.pu
Using JRE version 1.2.2
User home directory = C:\WINNT\Profiles\Administrador
Proxy Configuration: Manual Configuration
Proxy: http=proxy.uva.es:80
Proxy Overrides:
JAR cache disabled.
Inicializando entorno...
Inicializado
Contexto inicial creado
Excepcion de nombrado: javax.naming.NotContextException:
retvalentin09.cedetel.tel.uva.es:2481:ORCL/test/MyEJBRemote
Finalizado
I would appreciate if somebody could help me, as it is very
urgent.
Thanks in advance
Valentin
null

Answer 1

Hi
Oracle8i comes with set of samples. One of sample is accessing an
EJB from applet. check out demo.tar/demo.zip file
$ORACLE_HOME/javavm/demo directory.
You will find it useful.
regards
raghu
Valentin Alonso (guest) wrote:
: Hello,
: I've published my first EJB to Oracle 8i, and when I use a
: standalone java application as a client I have no problems.
: But when I try to access with an Applet, the Java console
shows:
: javax.naming.NotContextException:
: retvalentin09.cedetel.tel.uva.es:2481:ORCL/test/MyEJBRemote
: The code I use to connect to the EJB is the same as in the
: standalone application:
: Hashtable env = new Hashtable();
: System.out.println("Inicializando entorno...");
: env.put(Context.URL_PKG_PREFIXES, "oracle.aurora.jndi");
: env.put(Context.SECURITY_PRINCIPAL, "valentin");
: env.put(Context.SECURITY_CREDENTIALS, "valentin");
: env.put(Context.SECURITY_AUTHENTICATION,
: ServiceCtx.NON_SSL_LOGIN);
: System.out.println("Inicializado");
: try{
: Context ic = new InitialContext(env);
: System.out.println("Contexto inicial creado");
: MyEJBHome home = (MyEJBHome)
ic.lookup("sess_iiop://retvalentin09.cedetel.tel.uva.es:2481:ORCL
: /test/MyEJBRemote");
: System.out.println("Obtenido home Interface");
: try{
: try{
: MyEJBRemote holaBean = home.create(); // create a
: bean instance
: System.out.println("Obtenida referencia a EJB");
: System.out.println("Resultado:
"+holaBean.DimeHola());
: } catch (java.rmi.RemoteException
: RE){System.out.println("Excepcion remota: "+RE);}
: }catch (javax.ejb.CreateException
: CE){System.out.println("Excepcion de creacion: "+CE);}
: }catch (javax.naming.NamingException
: nE){System.out.println("Excepcion de nombrado: "+nE);}
: System.out.println("Finalizado");
: What is going wrong? I use Java Plugin 1.2.2 in the
: navigator, perhaps that is the problem.
: I've tried to compile the applet in JDeveloper 2.0 with JDK
: 1.1.7, but the Netscape Communicator throws Security Exceptions
: (I think the JVM of the navigator is 1.1.5), and it happens the
: same with Internet Explorer.
: I've tried to compile the applet in JDevelper 2.0 whit JDK 1.2,
: and in both Communicator and Explorer the Java Console shows
this
: messages:
: Java(TM) Plug-in: Version 1.2.2.pu
: Using JRE version 1.2.2
: User home directory = C:\WINNT\Profiles\Administrador
: Proxy Configuration: Manual Configuration
: Proxy: http=proxy.uva.es:80
: Proxy Overrides:
: JAR cache disabled.
: Inicializando entorno...
: Inicializado
: Contexto inicial creado
: Excepcion de nombrado: javax.naming.NotContextException:
: retvalentin09.cedetel.tel.uva.es:2481:ORCL/test/MyEJBRemote
: Finalizado
: I would appreciate if somebody could help me, as it is very
: urgent.
: Thanks in advance
: Valentin
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