private final File path;

  public UnixDomainSocketFactory(File path) {
    this.path = path;
  }

  @Override public Socket createSocket() throws IOException {
    UnixSocketChannel channel = UnixSocketChannel.open();
    return new TunnelingUnixSocket(path, channel);
  }

  @Override public Socket createSocket(String host, int port) throws IOException {
    Socket result = createSocket();

    try {

      this.endpoint = (InetSocketAddress) endpoint;

      UnixSocketAddress address = new UnixSocketAddress(path);
      serverSocketChannel = UnixServerSocketChannel.open();
      serverSocketChannel.configureBlocking(true);
      serverSocketChannel.socket().bind(address);
    }

    @Override public int getLocalPort() {
      return 1; // A white lie. There is no local port.
    }

    client.newWebSocket(request, this);

    // Trigger shutdown of the dispatcher's executor so this process exits immediately.
    client.dispatcher().executorService().shutdown();
  }

  @Override public void onOpen(WebSocket webSocket, Response response) {
    webSocket.send("Hello...");
    webSocket.send("...World!");
    webSocket.send(ByteString.decodeHex("deadbeef"));
    webSocket.close(1000, "Goodbye, World!");
  }

  }

  // TODO(jwilson): can I read the response body? Do I have to?
  //                the body from slack is a 0-byte-buffer
  @Override public synchronized void onOpen(WebSocket webSocket, Response response) {
    System.out.println("onOpen: " + response);
  }

  // TOOD(jwilson): decode incoming messages and dispatch them somewhere.
  @Override public void onMessage(WebSocket webSocket, String text) {