public long startTcpServer(SocketAddress sa) throws EmReactorException {
   try {
     ServerSocketChannel server = ServerSocketChannel.open();
     server.configureBlocking(false);
     server.socket().bind(sa);
     long s = createBinding();
     Acceptors.put(s, server);
     server.register(mySelector, SelectionKey.OP_ACCEPT, s);
     return s;
   } catch (IOException e) {
     throw new EmReactorException("unable to open socket acceptor: " + e.toString());
   }
 }
  public long connectTcpServer(String bindAddr, int bindPort, String address, int port) {
    long b = createBinding();

    try {
      SocketChannel sc = SocketChannel.open();
      sc.configureBlocking(false);
      if (bindAddr != null) sc.socket().bind(new InetSocketAddress(bindAddr, bindPort));

      EventableSocketChannel ec = new EventableSocketChannel(sc, b, mySelector);

      if (sc.connect(new InetSocketAddress(address, port))) {
        // Connection returned immediately. Can happen with localhost connections.
        // WARNING, this code is untested due to lack of available test conditions.
        // Ought to be be able to come here from a localhost connection, but that
        // doesn't happen on Linux. (Maybe on FreeBSD?)
        // The reason for not handling this until we can test it is that we
        // really need to return from this function WITHOUT triggering any EM events.
        // That's because until the user code has seen the signature we generated here,
        // it won't be able to properly dispatch them. The C++ EM deals with this
        // by setting pending mode as a flag in ALL eventable descriptors and making
        // the descriptor select for writable. Then, it can send UNBOUND and
        // CONNECTION_COMPLETED on the next pass through the loop, because writable will
        // fire.
        throw new RuntimeException("immediate-connect unimplemented");
      } else {
        ec.setConnectPending();
        Connections.put(b, ec);
        NewConnections.add(b);
      }
    } catch (IOException e) {
      // Can theoretically come here if a connect failure can be determined immediately.
      // I don't know how to make that happen for testing purposes.
      throw new RuntimeException("immediate-connect unimplemented: " + e.toString());
    }
    return b;
  }