• Purpose:
  • Provide naming and directory functionality
• Design Objective:
  • Independent of any specific naming/directory service implementation

• Java Application:
  • The user of the service
• JNDI API:
  • An abstraction layer that provides an interface to a service provider
• Service Provider:
  • An implementation of a particular naming/directory service

• Purpose:
  • Provides the functionality for accessing naming services
• The Context Interface:
  • bind(), rebind(), and unbind()
  • lookup()
  • listBindings()
• The Reference Class:
  • A reference to an entity that can't be directly bound to the naming/directory system

• Purpose:
  • Provides the functionality for accessing directory services
• The DirContext Interface:
  • getAttributes()
  • search()

• The javax.naming.event Package:
  • NamingEvent
  • NamingListener
• The javax.naming.spi Package:
  • Provides functionality for service providers to create Java objects, etc...

  Map<String, Object> environment;

  environment = new HashMap<String, Object>;
  environment.put(Context.INITIAL_CONTEXT_FACTORY,
                  "com.sun.jndi.ldap.LdapCtxFactory");
  environment.put(Context.PROVIDER_URL,
                  "ldap://localhost:22801/o=Cartoons");

  try
  {
    Context context = new InitialContext(environment);
    LdapContext result = (LdapContext) context.lookup("cn=Barney Rubble,ou=People");

    // Use the result

    context.close();
  }
  catch (NamingException ne)
  {
    // Handle the exception
  }
  

  CourseDatabase   db;

  try 
  {
    db = (CourseDatabase)Naming.lookup("rmi://localhost:22801/CourseDatabase");

    // Use the result
  }
  catch (NamingException ne) 
  {
    // Handle the exception
  }