Error swing and j2ee

Question

I have an application based on on j2ee. All the logica of the program this in J�E but the part client I am doing it in swing.
I want to know if there is "something" with which I can unite the transference of information between the layer swing and j2ee.
But of all ways I am making an example fast but I have an error and not like solving it.
I am using Oracle9i, JDevelepoer 9.0.5 and the code is:
Context context = new InitialContext();
clienteBOHome = (ClienteBOHome)PortableRemoteObject.narrow(context.lookup("java:comp/env/ejb/cliente"), ClienteBOHome.class);
clienteBO = clienteBOHome.create();
colClientes = (Vector)clienteBO.listarClientes();
And the error is:
javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:640)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:243)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:280)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at com.tsawi.pm.gui.ListarClientes.jbInit(ListarClientes.java:58)
at com.tsawi.pm.gui.ListarClientes.<init>(ListarClientes.java:44)

Answer 1

Hi raguero,
if you want to create and use a naming context, you need a JNDI service provider. A JNDI service provider is who provides a client 2 thinks:
1) A Context Factory, which JNDI API uses tu build JNDI context
2) A service listening on an host-port
If you deploy your J2EE app under J2EE RI, you connect to JNDI service by this url:
iiop://hostname:1050 (by default)
and context factory to use is "com.sun.jndi.cosnaming.CNCtxFactory"
so you got context like this:
Properties prop=new Properties();
prop.add(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.cosnaming.CNCtxFactory");
prop.add(Context.PROVIDER_URL,"iiop://hostname:1050")
Context jndiContext=new InitialContext(prop);
Obvious, com.sun.jndi.cosnaming.CNCtxFactory class must be in client classpath.
Fil