public class MessageManager
{
    private Message lastMessage = null;
    private Network net;


    public MessageManager(Network net)
    {
        this.net = net;
    }

    private boolean send(Message m)
    {
        try
        {
            net.sendMessage(m);
            lastMessage = null;
            return true;
        }
        catch(IOException e)
        {
            lastMessage = m;
            return false;
        }
    }

    public void run()
    {
        if (lastMessage != null)
        {
            if (!send(lastMessage))
                return;
        }

        while (net.hasMessageAvailable())
        {
            if (!send(net.readNextMessage()))
                return;
        }
    }
}