Untitled Document

### Source Code for Naming Example

    import java.io.IOException;
    import java.io.PrintWriter;
    import java.util.Enumeration;
    import java.util.Hashtable;
    import javax.servlet.*;
    import javax.servlet.http.*;
    import javax.naming.NamingException;
    import javax.naming.Context;
    import javax.naming.InitialContext;
    import javax.naming.NamingEnumeration;
    import javax.naming.directory.InitialDirContext;

    /**
     * Demonstration of the web application environment support.
     *
     * @author Remy Maucherat
     */

    public class JndiServlet
        extends HttpServlet {

        public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

            PrintWriter out = response.getWriter();
            response.setContentType("text/plain");

            Context ctx = null;

            try {
                ctx = new InitialContext();
            } catch (NamingException e) {
                out.println("Couldn't build an initial context : " + e);
                return;
            }

            try {
                Object value = ctx.lookup("java:/comp/env/maxExemptions)";
                out.println("Simple lookup test : ");
                out.println("Max exemptions value : " + value);
            } catch (NamingException e) {
                out.println("JNDI lookup failed : " + e);
            }

            try {
                Context envCtx = (Context) ctx.lookup("java:/comp/env/");
                out.println("list() on /comp/env Context : ");
                NamingEnumeration enum = ctx.list("java:/comp/env/");
                while (enum.hasMoreElements()) {
                    out.print("Binding : ");
                    out.println(enum.nextElement().toString());
                }
                out.println("listBindings() on /comp/env Context : ");
                enum = ctx.listBindings("java:/comp/env/");
                while (enum.hasMoreElements()) {
                    out.print("Binding : ");
                    out.println(enum.nextElement().toString());
                }
            } catch (NamingException e) {
                out.println("JNDI lookup failed : " + e);
            }

        }

    }