import java.nio.channels.*;
import java.net.*;
import java.util.*;
import java.io.*;

public class Server {

	private ServerSocketChannel server;
	private Selector selector;

	public static void main(String[] args) throws Exception {
		Server s = new Server(args[0], Integer.valueOf(args[1]));

		s.recvLoop();		
	}

	public void recvLoop() throws Exception {
		for (;;) {
			System.out.println("About to select");
			System.out.println(String.format("found %d elements", selector.select()));
			Set<SelectionKey> keys = selector.selectedKeys();

			for (SelectionKey key : keys) {
				//SelectionKey key = it.next();
				//it.remove(); //required
				keys.remove(key);	
				Socket s = ((ServerSocketChannel)key.channel()).accept().socket();
				PrintWriter out = new PrintWriter(s.getOutputStream(), true);
				out.println("k, thx, bye");
				out.close();
			}
			Thread.sleep(500);
		}
	}

	public Server(String host, int port) throws Exception {
		server = ServerSocketChannel.open();
		server.configureBlocking(false);
		server.socket().bind(new InetSocketAddress(host, port));

		selector = Selector.open();
		server.register(selector, SelectionKey.OP_ACCEPT);
	}
}