finger.java

aglet的部分源码

package examples.patterns;

/*
 * @(#)Finger.java
 * 
 * 03L7246 (c) Copyright IBM Corp. 1996, 1998
 * 
 * The program is provided "as is" without any warranty express or
 * implied, including the warranty of non-infringement and the implied
 * warranties of merchantibility and fitness for a particular purpose.
 * IBM will not be liable for any damages suffered by you as a result
 * of using the Program. In no event will IBM be liable for any
 * special, indirect or consequential damages or lost profits even if
 * IBM has been advised of the possibility of their occurrence. IBM
 * will not be liable for any third party claims against you.
 */

import com.ibm.aglet.*;
import com.ibm.agletx.patterns.*;

import java.net.*;
import java.util.Properties;
import java.io.IOException;
import java.util.Vector;

/**
 * Class Finger is used to retrieve local user information from a remote
 * aglet server. This information includes the name, organization, email
 * address, and the local time at the remote server. Given an URL
 * (Agler Resource Locator) it will dispatch a slave (the FingerSlave
 * class) to retrieve local user information. The slave will return with
 * the information to be displayed by the master.
 * 
 * @see FingerSlave
 * @version     1.00    96/12/28
 * @author      Danny B. Lange
 * @author      Yariv Aridor
 * @version     1.01    98/11/18
 * @author      Shintaro Kosugi
 */

public class Finger extends SampleAglet {

	// Aglet web source (the URL & classname of the slave class).
	private static final String SlaveClassName = 
		"examples.patterns.FingerSlave";

	/**
	 * Creates and sets up the slave with necessary information for it to
	 * dispatch to a remote aglet server and hopefully return safely. This
	 * method is a callback method for the interaction window.
	 * @param url the url of the destination.
	 */
	protected void createSlave(Vector destinations, Object obj) {
		try {
			Slave.create(null, SlaveClassName, getAgletContext(), this, 
						 destinations, new String());
		} catch (IOException ae) {
			inError(ae.getMessage());
		} catch (AgletException ae) {
			inError(ae.getMessage());
		} 
	}
	public void createWindow() {
		try {
			_msw = new FingerWindow(this);
			updateWindow();
		} catch (Exception e) {
			inError(e.getMessage());
		} 
	}
	// -- Handler for messages
	// 
	public boolean handleMessage(Message msg) {
		try {
			if (msg.sameKind("result")) {
				FingerInfo arg = null;

				if ((arg = (FingerInfo)(msg.getArg())) != null) {
					_msw.setResult(arg.toTextBlock());
					setTheMessage("Finished");
				} else {
					setTheMessage("Finished, but no argument!");
				} 
			} else {
				super.handleMessage(msg);
			} 
		} catch (Exception e) {

			// -- not yet handled
			System.out.println(e);
		} 
		return false;
	}
}