simplemaster.java

在IBM AGLET平台下可由服务器端迁移到客户端并返回操作的代码

package examples.simplemasterslave;

import com.ibm.aglet.Aglet;
import com.ibm.aglet.Message;
import com.ibm.agletx.patterns.Slave;
import java.awt.*;
import java.io.PrintStream;
import java.net.URL;
import java.util.Vector;

// Referenced classes of package examples.simplemasterslave:
//            CommandWindow

public class SimpleMaster extends Aglet
{

    Vector urllist;
    String SlaveClassName;

    public SimpleMaster()
    {
        urllist = null;
        SlaveClassName = "examples.simplemasterslave.SimpleSlave";
    }

    private void addURL(URL url)
    {
        urllist.addElement(url);
    }

    private void createGUI()
    {
        CommandWindow commandwindow = new CommandWindow(getProxy());
        commandwindow.pack();
        commandwindow.setSize(commandwindow.getPreferredSize());
        commandwindow.setVisible(true);
    }

    private void createSlave()
    {
        try
        {
            Slave.create(getCodeBase(), SlaveClassName, getAgletContext(), this, getURLList(), new String());
        }
        catch(Exception exception)
        {
            System.out.println("Error:" + exception.getMessage());
        }
    }

    private Vector getURLList()
    {
        return urllist;
    }

    public boolean handleMessage(Message message)
    {
        if(message.sameKind("go"))
        {
            createSlave();
            return true;
        }
        if(message.sameKind("add"))
        {
            addURL((URL)message.getArg());
            return true;
        }
        if(message.sameKind("remove"))
        {
            removeURL(((Integer)message.getArg()).intValue());
            return true;
        }
        if(message.sameKind("getlist"))
        {
            message.sendReply(getURLList());
            return true;
        } else
        {
            return false;
        }
    }

    public void onCreation(Object obj)
    {
        urllist = new Vector();
        createGUI();
    }

    private void removeURL(int i)
    {
        urllist.removeElementAt(i);
    }
}