sender.java

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// Sender.java
//
// Copyright (c) 2000-2001 Symbian Ltd. All rights reserved

package com.symbian.devnet.whist.tokenRing;

import javax.net.datagram.*;
import java.io.*;

/**
 * A class responsible for initialising as <code>DatagramService</code> to be 
 * used for sending <code>Datagram</code>s and for using it to send 
 * <code>Datagram</code>s.
 * @author Symbian Devnet
 */ 
class Sender
{ 
	/**
	 * The <code>DatagramService</code> through which 
	 * <code>Datagram</code>s are sent. 
	 */
	private DatagramService senderService;		

	/** 
	 * Constructor which initialises the <code>DatagramService</code>.
	 * @param a 	the <code>Address</code> the <code>DatagramService</code> is
	 * 				initislised on.
	 */
	Sender(Address a) throws Exception
	{
		try
		{
			senderService = DatagramService.getServerService(a);
		}
		catch(Exception e)
		{
			System.out.println("Unable to getServerService.");
			System.exit(0);
		}
	}
	
	/**
	 * A method allowing <code>Datagram</code>s to be sent using the 
	 * <code>DatagramService</code>.
	 * @param dg the <code>Datagram</code> to be sent
	 */
	public void sendToken(Datagram dg) throws Exception
	{
		try
		{
			senderService.send(dg);			
		}
		catch(Exception e)
		{
			System.out.println("Address not supported.");
			System.exit(0);
		}	
	}
}