Utilisation des ServerSocketChannel

Bonjour tous le monde,

Je cherche à développer une application monothread qui récupère des données reçues sur deux ports afin de les traiter.

Je me suis donc orienté vers les ServerSocketChannel mais là je bloque.
Je ne comprends pas pourquoi dans mon code ci-dessous le selector.select() vaut 0 alors que pourtant je lui ai associé mes 2 ServerSocketChannel.
Code:
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import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.Iterator;
 
public final class ChannelManager
{
    Selector selector = null;
    ServerSocketChannel sChannel1;
    ServerSocketChannel sChannel2;
 
    public ChannelManager() throws IOException
    {
        try
        {
            // Create the selector
            selector = Selector.open();
 
            // Create two non-blocking sockets. This method is implemented in
            // Creating a Non-Blocking Socket.
            sChannel1 = createServerSocketChannel("127.0.0.1", 31110);
            sChannel2 = createServerSocketChannel("127.0.0.1", 32110);
 
            // Register the channel with selector, listening for all events
            sChannel1.register(selector, SelectionKey.OP_ACCEPT);
            sChannel2.register(selector, SelectionKey.OP_ACCEPT);
        }
        catch (IOException e)
        {
            System.out.println("I'll be crazy "+e);
        }
 
// Wait for events
        while (selector.select() > 0)
        {
 
            // Get list of selection keys with pending events
            Iterator it = selector.selectedKeys().iterator();
 
            // Process each key at a time
            while (it.hasNext())
            {
                // Get the selection key
                SelectionKey selKey = (SelectionKey) it.next();
                // Remove it from the list to indicate that it is being processed
                it.remove();
                try
                {
                    processSelectionKey(selKey);
                }
                catch (IOException e)
                {
                    System.out.println("exception" + e);
                    selKey.cancel();
                }
            }
        }
        System.out.println("END");
    }
 
    public ServerSocketChannel createServerSocketChannel(String hostName, int port) throws IOException
    {
        // Create a non-blocking server socket channel
        InetSocketAddress address = new InetSocketAddress(hostName, port);
        ServerSocketChannel sChannel = ServerSocketChannel.open();
        sChannel.configureBlocking(false);
        sChannel.socket().bind(address);
        System.out.println("Channel from: " + hostName + " port: " + port + " isOpen :"+ sChannel.isOpen());
        return sChannel;
    }
 
    public void processSelectionKey(SelectionKey selKey) throws IOException
    {
        // Since the ready operations are cumulative,
        // need to check readiness for each operation
        if (selKey.isValid() && selKey.isConnectable())
        {
            // Get channel with connection request
            SocketChannel sChannel = (SocketChannel) selKey.channel();
            System.out.println("valid et connectable:" +sChannel.toString());
            boolean success = sChannel.finishConnect();
            if (!success)
            {
                // An error occurred; handle it
                // Unregister the channel with this selector
                selKey.cancel();
            }
 
        }
        if (selKey.isValid() && selKey.isReadable())
        {
            // Get channel with bytes to read
            SocketChannel sChannel = (SocketChannel) selKey.channel();
 
            if (sChannel.equals(sChannel1))
            {
                System.out.println(" channel 1 state : " + sChannel1.isOpen());
 
            }
            else if (sChannel.equals(sChannel2))
            {
                System.out.println("channel 2 state : " + sChannel2.isOpen());
 
            }
            else
            {
                System.out.println("ni 1 ni 2");
            }
        }
        if (selKey.isValid() && selKey.isWritable())
        {
            // Get channel that's ready for more bytes
            SocketChannel sChannel = (SocketChannel) selKey.channel();
 
            // See Writing to a SocketChannel
        }
    }
 
    public static void main(String[] args) throws IOException
    {
        ChannelManager channel = new ChannelManager();
    }
}
Quelqu'un saurait-il m'indiquer comment procéder ?

Merci d'avance pour votre aide.