registerwithrmicommunityserver.java

网上虚拟社区

import java.rmi.*;
import java.rmi.registry.*;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.net.MalformedURLException;

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

public class RegisterWithRMICommunityServer{
	  /** Main method */
	  public static void main(String[] args) {
//?	    System.setSecurityManager(new RMISecurityManager());

	    try {
	      CommunityServerInterfaceImpl obj =
	          new CommunityServerInterfaceImpl();
	      registerToRegistry("CommunityServerInterfaceImpl", obj, true);
	      
	      System.out.println("VirtualCommunity server " + obj + " registered");
	    }
	    catch (RemoteException ex) {
	      ex.printStackTrace();
	    }
	    catch (MalformedURLException ex) {
	      ex.printStackTrace();
	    }   
	    MyPanel1 applet = new MyPanel1();
	    JFrame frame = new JFrame();
	    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	    frame.setTitle("VirtualCommunity Sql Operator Server");
	    frame.getContentPane().add(applet, BorderLayout.CENTER);
	    applet.init();
	    applet.start();
	    frame.setSize(700, 500);
	    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
	    frame.setLocation((d.width - frame.getSize().width) / 2,
	      (d.height - frame.getSize().height) / 2);
	    frame.setVisible(true);
	  }

	  /** Register StudentImpl object with the RMI registry.
	   * @param name - name identifying the service in the RMI registry
	   * @param create - create local registry if necessary
	   * @throw RemoteException if cannot be exported or bound to RMI
	   *    registry
	   * @throw MalformedURLException if name cannot be used to
	   *    construct a valid URL
	   * @throw IllegalArgumentException if null passed as name
	   */
	  public static void registerToRegistry(String name, Remote obj,
	      boolean create) throws RemoteException, MalformedURLException{
	    if (name == null) throw new IllegalArgumentException(
	      "registration name can not be null");

	    try {
	      Naming.rebind(name, obj);
	    }
	    catch (RemoteException ex) {
	      if (create) {
	    	  try{
	    	        Registry r = LocateRegistry.createRegistry(Registry.REGISTRY_PORT);
	    	        r.rebind(name, obj);  
	    	  }
	    	  catch(Exception e){System.out.println("Cann\'t rebind! ");}
	      } else throw ex;
	    }
	  }
}