ceph/src/mds/Mantle.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2016 Michael Sevilla <mikesevilla3@gmail.com>
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15 #ifndef CEPH_MANTLE_H
  16 #define CEPH_MANTLE_H
  17
  18 #include <boost/utility/string_view.hpp>
  19
  20 #include <lua.hpp>
  21 #include <vector>
  22 #include <map>
  23 #include <string>
  24
  25 #include "mdstypes.h"
  26
  27 class Mantle {
  28   public:
  29     Mantle();
  30     ~Mantle() { if (L) lua_close(L); }
  31     int balance(boost::string_view script,
  32                 mds_rank_t whoami,
  33                 const std::vector <std::map<std::string, double>> &metrics,
  34                 std::map<mds_rank_t,double> &my_targets);
  35
  36   protected:
  37     lua_State *L;
  38 };
  39
  40 #endif