code: @PostConstruct
    public void init()
      throws ConfigException
    {
      if (_engine == null) {
        if (certificateFile() == null)
          throw new ConfigException(L.l("'certificate-file' is required for OpenSSL."));
  
        if (password() == null)
          throw new ConfigException(L.l("'password' is required for OpenSSL."));
      }
    }
docs: Initialize