/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

/*****************************************************************************
 * $Id: load_brm.cpp 1905 2013-06-14 18:42:28Z rdempsey $
 *
 ****************************************************************************/

#include <unistd.h>
#include <iostream>
#include <string>
#include <stdexcept>
using namespace std;

#include <boost/interprocess/shared_memory_object.hpp>
#include <boost/interprocess/mapped_region.hpp>
#include <boost/interprocess/sync/interprocess_mutex.hpp>
namespace bi = boost::interprocess;

#include "IDBPolicy.h"
#include "blockresolutionmanager.h"
#include "shmkeys.h"
using namespace BRM;

namespace
{
void usage()
{
  cout << "usage: load_brm [-fh] prefix" << endl << endl;
  cout << "   -h display this help" << endl;
  cout << "   -f possibly fix a corrupted Free List" << endl;
}

struct CtlShmImage
{
  bi::interprocess_mutex controlFifoMutex;
};

}  // namespace

int main(int argc, char** argv)
{
  opterr = 0;
  bool fflg = false;

  int c;

  while ((c = getopt(argc, argv, "fh")) != EOF)
    switch (c)
    {
      case 'f': fflg = true; break;

      case 'h':
      case '?':
      default:
        usage();
        return (c == 'h' ? 0 : 1);
        break;
    }

  if ((argc - optind) != 1)
  {
    usage();
    return 1;
  }

  idbdatafile::IDBPolicy::configIDBPolicy();

  BlockResolutionManager brm;
  int err;
  string prefix;

  prefix = argv[optind];
  err = brm.loadState(prefix, fflg);

  if (err != 0)
  {
    cout << "Loading BRM snapshot failed (" << prefix << ")\n";
    return 1;
  }

  err = brm.replayJournal(prefix);

  if (err < 0)
  {
    cout << "Could not load BRM journal file\n";
    return 1;
  }

  ShmKeys shmkeys;
  string key_name = ShmKeys::keyToName(shmkeys.DECOMSVRMUTEX_SYSVKEY);
  bi::shared_memory_object::remove(key_name.c_str());
  bi::permissions perms;
  perms.set_unrestricted();

  try
  {
    bi::shared_memory_object shm(bi::create_only, key_name.c_str(), bi::read_write, perms);
    shm.truncate(sizeof(CtlShmImage));
    bi::mapped_region region(shm, bi::read_write);
    (void)new (region.get_address()) CtlShmImage;
  }
  catch (...)
  {
    // Hmm...we just deleted it above, but the create failed...just bail out
    throw runtime_error("couldn't create DecomSvr shm");
  }

  /* An OAM friendly success msg */
  cout << "OK.\n";
  cout << "Successfully loaded BRM snapshot\n";
  cout << "Successfully replayed " << err << " BRM transactions\n";

  return 0;
}