MultiJabberClient.java

package com.e2u.net;
//: c15:MultiJabberClient.java
// Client that tests the MultiJabberServer
// by starting up multiple clients.
import java.net.*;
import java.io.*;

class JabberClientThread extends Thread
{
	private Socket socket;
	private BufferedReader in;
	private PrintWriter out;
	private static int counter = 0;
	private int id = counter++;
	private static int threadcount = 0;

	public static int threadCount()
	{
		return threadcount;
	}

	public JabberClientThread(InetAddress addr)
	{
		System.out.println("Making client " + id);
		threadcount++;
		try
		{
			socket = new Socket(addr, MultiJabberServer.PORT);
		}
		catch(IOException e)
		{
			System.err.println("Socket failed");
			// If the creation of the socket fails,
			// nothing needs to be cleaned up.
		}
		try
		{
			in = new BufferedReader(new InputStreamReader(socket
				.getInputStream()));
			// Enable auto-flush:
			out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(
				socket.getOutputStream())), true);
			start();
		}
		catch(IOException e)
		{
			// The socket should be closed on any
			// failures other than the socket
			// constructor:
			try
			{
				socket.close();
			}
			catch(IOException e2)
			{
				System.err.println("Socket not closed");
			}
		}
		// Otherwise the socket will be closed by
		// the run() method of the thread.
	}

	public void run()
	{
		try
		{
			for(int i = 0; i < 25; i++)
			{
				out.println("Client " + id + ": " + i);
				String str = in.readLine();
				System.out.println(str);
				
				try
				{
					Thread.sleep(2000);
				}
				catch(InterruptedException e)
				{
					// ignore
				}
				
			}
			out.println("END");
		}
		catch(IOException e)
		{
			System.err.println("IO Exception");
		}
		finally
		{
			// Always close it:
			try
			{
				socket.close();
			}
			catch(IOException e)
			{
				System.err.println("Socket not closed");
			}
			threadcount--; // Ending this thread
		}
	}
}

public class MultiJabberClient
{
	static final int MAX_THREADS = 5;

	public static void main(String[] args) throws IOException,
		InterruptedException
	{
		InetAddress addr = InetAddress.getByName(null);
		while(true)
		{
			if(JabberClientThread.threadCount() < MAX_THREADS)
				new JabberClientThread(addr);
			Thread.currentThread().sleep(10000);
		}
	}
} // /:~