package examples.ejb.sequence.jdbc;

import javax.naming.*;
import javax.ejb.*;
import java.rmi.RemoteException;
import java.util.Hashtable;

/**
 * This class demonstrates calling an entity EJBean,
 * followed by creating two new accounts with an opening balance
 * and an automatically generated primary key.
 * <p>
 * This class also illustrates how to search the JNDI tree
 * for an appropriate container. 
 * 
 * @author Copyright (c) 1998 by WebLogic, Inc. All Rights Reserved.
 * @author Copyright (c) 1998-1999 by BEA WebXpress. All Rights Reserved.
 */
 public class Client {

  static String url       = "t3://localhost:7001";
  static String user      = null;
  static String password  = null;

  /**
   * Runs this example from the command line. Example:
   * <p>
   * <tt>java examples.ejb.sequence.jdbc.Client "t3://localhost:7001" scott tiger</tt>
   * <p>
   * The parameters are optional, but if any are supplied,
   * they are interpreted in this order:
   * <p>
   * @param url               URL such as "t3://localhost:7001" of Server
   * @param user              User name, default null
   * @param password          User password, default null
   */
  public static void main(String[] args) {
    System.out.println("\nBeginning sequence.jdbc.Client...\n");

    // Parse the argument list 
    if ((args == null) || (args.length == 0)) {} 
      else
    for (int i = 0; i < args.length; i++) {
      switch(i) {
        case 0:
          url = args[i];
          break;
        case 1:
          user = args[i];
          break;
        case 2:
          password = args[i];
          break;
        default:
      }
    }

    double balance = 3000;

    try {
      // Contact the AutoAccountBean container (the "AutoAccountHome") through JNDI.
      Context         ctx  = getInitialContext();
      AutoAccountHome home = (AutoAccountHome) ctx.lookup("jdbc.AutoAccountHome");

      // Create a new account with an opening balance
      // Display the account id that was assigned and the opening balance

      AutoAccount ac1 = home.create(balance); 
      System.out.println("AutoAccount " + ac1.accountId() + 
                           " created with an opening balance of $" + ac1.balance());

      // Create another new account with twice the opening balance
      // Display the account id that was assigned and the opening balance

      AutoAccount ac2 = home.create(balance*2); 
      System.out.println("AutoAccount " + ac2.accountId() + 
                           " created with an opening balance of $" + ac2.balance());

      System.out.println("\nRemoving AutoAccounts created...");
      ac1.remove();
      ac2.remove();

    // Catch any exceptions
    }
    catch (ProcessingErrorException pe) {
      System.out.println("Unexpected Processing Error: " + pe);
    } 
    catch (Exception e) {
      System.out.println(":::::::::::::: Unexpected Error :::::::::::::::::");
      e.printStackTrace();
    } 
    finally {
      System.out.println("\nEnd sequence.jdbc.Client...");
    }
  }

  /**
   * Gets an initial context for the current user, password and url.
   *
   * @return                  Context
   * @exception               java.lang.Exception if there is
   *                          an error in getting the Context
   */
  static public Context getInitialContext() throws Exception {
    Hashtable h = new Hashtable();
    h.put(Context.INITIAL_CONTEXT_FACTORY,
        "weblogic.jndi.WLInitialContextFactory");
    h.put(Context.PROVIDER_URL, url);
    if (user != null) {
      System.out.println ("user: " + user);
      h.put(Context.SECURITY_PRINCIPAL, user);
      if (password == null) 
      password = "";
      h.put(Context.SECURITY_CREDENTIALS, password);
    } 
    return new InitialContext(h);
  }
}