code: @Override
      public void sessionOpened(IoSession session) {
          // Set timeouts
          session.getConfig().setWriteTimeout(writeTimeout);
          session.getConfig().setIdleTime(IdleStatus.READER_IDLE, readTimeout);
  
          // Create streams
          InputStream in = new IoSessionInputStream();
          OutputStream out = new IoSessionOutputStream(session);
          session.setAttribute(KEY_IN, in);
          session.setAttribute(KEY_OUT, out);
          processStreamIo(session, in, out);
      }
docs: Initializes streams and timeout settings.