administrativelogin.java

这是一个用java和xml编写的流媒体服务器管理软件

/*
 * ====================================================================
 * The Class Description 
 * Version:  1.0.0
 * Date:     11/08/2005
 * Author:   Xing.zhou
 * Function: Administrator or User login screen 
 * 
 * ====================================================================
 * 
 */

package vocal.ui;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.io.DataInputStream;
import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.swing.JApplet;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

import vocal.comm.VPPException;
import vocal.comm.VPPTransactionWrapper;

public class AdministrativeLogin extends JApplet
{
  boolean isStandalone = false;
  boolean state = false;		//current status is application or applet
  String hostName;
  static String ServerIp;
  int portNumber;

  AdministrativeLoginPanel panel;


  private static VPPTransactionWrapper connection = null;

  // Get a parameter value
  public String getParameter(String key, String def)
  {
    return isStandalone ? System.getProperty(key, def) 
           : (getParameter(key) != null ? getParameter(key) : def);
  }

  // Initialize the applet
  public void init()
  {
  	  //isStandalone = false;
      String javaVersion = java.lang.System.getProperty("java.version").substring(0,3);

      //System.out.println(javaVersion);

      if(javaVersion.compareTo("1.4") < 0)
      {
	  if(isStandalone)
	  {
	      System.err.println("This program requires Java JRE 1.4 or higher to run.\n");
	  }
	  else
	  {
	      JOptionPane.showMessageDialog(this, 
					    "This program requires Java JRE 1.4 or higher.\n",
					    "ERROR",
					    JOptionPane.ERROR_MESSAGE);
	  }
	  connection = null;

	  return;
      }
      //System.out.println(isStandalone);
      if (false == isStandalone)
      {    	  
    	  state = isStandalone;
      }
      else
      {    	  
    	  state = !isStandalone;
      }
      System.out.println(state);
      if (state)
      {
    	  // this applet is buggy!
    	  JOptionPane.showMessageDialog(this, 
					"This applet does not work in the applet context due to applet permissions problems.\n" +
					"Please see http://bugzilla.vovida.org/bugzilla/show_bug.cgi?id=579 for details\n", 
					"ERROR",
					JOptionPane.ERROR_MESSAGE);
    	  connection = null;

    	  return;
      }
      else
      {

    	  try
    	  {
    		  hostName = this.getParameter("host", "192.168.1.39");
    		  //hostName = this.getParameter("host", ServerIp);
    		  
    	  }
    	  catch (Exception e)
    	  {
    		  e.printStackTrace();
    	  }

    	  try
    	  {
    		  portNumber = Integer.parseInt(this.getParameter("port", "6005"));
    	  }
    	  catch (Exception e)
    	  {
    		  e.printStackTrace();
    	  }

    	  try
    	  {
    		  connection = new VPPTransactionWrapper(hostName, portNumber);
    	  }
    	  catch (VPPException e)
    	  {
    		  System.out.println("Could not open connection to pserver");
    		  e.printStackTrace();
    		  JOptionPane.showMessageDialog(this, 
    				  "Could not open connection to pserver because: \n" + e, 
    				  "ERROR", JOptionPane.ERROR_MESSAGE);

    		  return;
    	  }

    	  panel = new AdministrativeLoginPanel(isStandalone, connection, 
    			  getRootPane());

    	  getContentPane().add(panel);
      }
  }


  public String[][] getParameterInfo()
  {
    String[][] pinfo = 
    {
      {
        "host", "String", "Host name of machine running pserver"
      }, 
      {
        "port", "int", "Port number of pserver"
      }, 
    };

    return pinfo;
  }

  // Main method
  public static void main(String[] args)
  {
  	/*
    if (args.length < 2)
    {
      System.out.println("Usage:");
      System.out.println("  AdministrativeLogin host port");

      return;
    }
    
	*/ 
	  try
	  {
		 //得到本机的IP
	    InetAddress address=InetAddress.getLocalHost();	
	    ServerIp = (String)address.getHostAddress();
	    System.out.println(ServerIp);
      } 
	  catch(UnknownHostException e)
	  {
		  System.out.println("counld not find.");
	  }  
	     
    //System.setProperty("host", ServerIp);
    System.setProperty("host", "192.168.1.39");
    System.setProperty("port", "6005");

    AdministrativeLogin applet = new AdministrativeLogin();
    applet.state = true;
    applet.isStandalone = true;

    JFrame frame = new JFrame();

    // EXIT_ON_CLOSE == 3
    frame.setDefaultCloseOperation(3);
    frame.setTitle("Extend Multimedia Server");

    applet.init();

    if (connection == null)
    {
	System.exit(-1);
    }

    applet.panel = new AdministrativeLoginPanel(applet.isStandalone, 
            applet.connection, frame.getRootPane());

    vocal.util.Logger.log("Test log message");

    applet.start();
    frame.getContentPane().add(applet.panel, BorderLayout.CENTER);
    frame.pack();   
    
    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();

    frame.setLocation((d.width - frame.getSize().width) / 2, 
                      (d.height - frame.getSize().height) / 2);
    frame.setVisible(true);
    frame.setResizable(false);
  }


  public static VPPTransactionWrapper getConnection()
  {
    return connection;
  }

}