class OzoneBlockTokenSecretManager extends
    OzoneSecretManager<OzoneBlockTokenIdentifier> {

  @Override
  public OzoneBlockTokenIdentifier cancelToken(Token<OzoneBlockTokenIdentifier>
      token, String canceller) throws IOException {
    throw new UnsupportedOperationException("Cancel token operation is not " +
        "supported for ozone block tokens.");
  }

  public  OzoneBlockTokenSecretManager(SecurityConfig conf,
      long blockTokenExpirytime, String omCertSerialId);

}