JNDI generic example

Question

Hello. I am trying to execute a generic javax.naming.Context example, which reads the env variable to initialize the Context from a jndi.properties file. I am aware the at runtime Java looks at the class path for the prop file and I have changed my classpath to reflect the prop file such as classpath=JAVA_HOME\lib\jndi.properties, where JAVA_HOME is where my java lib exists.
The program is:
import javax.naming.*;
class AppList {
public static void main(String[] args) {
String target = "";
try {
     Context ctx = new InitialContext();
     NamingEnumeration enum = ctx.list(target);
     while (enum.hasMore()) {
     System.out.println(enum.next());
     } catch (NamingException e) {
     e.printStackTrace();
However when I execute it I get the following error:
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(Unknown Source)
at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.list(Unknown Source)
at AppList.main(AppList.java:54)
I am aware that this error means that environment variables could not be found to initalize the Context.
I have tried changing my classpath, my JAVA_HOME, and my path to reflect the jndi.properties file, but nothing seem to work and I keep gettign he above exception.
I would apprecaite if someone could shed some light on this matter.
Thank you.

Answer 1

I have not tried that but -
This is a standard example from my code.
It is not exactly what you want but it may help.
The following variables are initialized elsewhere by reading from a control file.
LDAPPROVIDER = "ldap://192.168.1.103:636";
LDAPAUTHENTICATION = "simple";
LADPPROTOCOL = "ssl";
LDAPPRINCIPAL = "cn=wim,ou=roles,dc=wim,dc=ca";
LDAPCREDENTIALS = "Test1234";
// global variable to hold context
public static DirContext ctx = null;
public static DirContext openLDAPContext() {
  // set up the environment
  Hashtable env = new Hashtable();
  env.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");
  env.put(Context.PROVIDER_URL, LDAPPROVIDER);
  env.put(Context.SECURITY_AUTHENTICATION,LDAPAUTHENTICATION);
  env.put(Context.SECURITY_PROTOCOL, LADPPROTOCOL);
  env.put(Context.SECURITY_PRINCIPAL,LDAPPRINCIPAL);
  env.put(Context.SECURITY_CREDENTIALS,LDAPCREDENTIALS);
  env.put(Context.REFERRAL,"ignore");
  ctx = null;
  try {
    ctx = new InitialDirContext(env);
    // if here LDAP connection successfully
  catch (NamingException ex) {
    // *** LDAP SYSTEM ERROR
  // if return null connection failed
  return ctx;
}[b[With a search I got these - any help?[/b]
http://forum.java.sun.com/thread.jspa?forumID=51&threadID=91031
http://forum.java.sun.com/thread.jspa?forumID=51&threadID=238059
http://forum.java.sun.com/thread.jspa?forumID=51&threadID=222762
http://forum.java.sun.com/thread.jspa?forumID=48&threadID=184798
http://forum.java.sun.com/thread.jspa?forumID=48&threadID=445564
rykk