/* 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: save_brm.cpp 1910 2013-06-18 15:19:15Z rdempsey $
 *
 ****************************************************************************/

/*
 * Saves the current state of the BRM data structures.
 *
 * More detailed description
 */

#include <unistd.h>
#include <iostream>
#include <sys/types.h>
#include <sys/stat.h>
using namespace std;

#include "brmtypes.h"
#include "rwlock.h"
#include "mastersegmenttable.h"
#include "extentmap.h"
#include "copylocks.h"
#include "vss.h"
#include "vbbm.h"
#include "blockresolutionmanager.h"
#include "IDBDataFile.h"
#include "IDBPolicy.h"
using namespace idbdatafile;
using namespace BRM;

#include "configcpp.h"

int main(int argc, char** argv)
{
  BlockResolutionManager brm;
  config::Config* config = config::Config::makeConfig();
  int err;
  string prefix, currentFilename;
  IDBDataFile* currentFile = NULL;

  if (argc > 1)
    prefix = argv[1];
  else
  {
    prefix = config->getConfig("SystemConfig", "DBRMRoot");

    if (prefix.length() == 0)
    {
      cerr << "Error: Need a valid Calpont configuation file" << endl;
      exit(1);
    }
  }

  idbdatafile::IDBPolicy::configIDBPolicy();

  err = brm.saveState(prefix);

  if (err == 0)
    cout << "Saved to " << prefix << endl;
  else
  {
    cout << "Save failed" << endl;
    exit(1);
  }

  (void)::umask(0);

  currentFilename = prefix + "_current";
  currentFile = IDBDataFile::open(IDBPolicy::getType(currentFilename.c_str(), IDBPolicy::WRITEENG),
                                  currentFilename.c_str(), "wb", 0);

  if (!currentFile)
  {
    cerr << "Error: could not open " << currentFilename << "for writing" << endl;
    exit(1);
  }

  try
  {
    prefix += '\n';
    // for MCOL-1558.  Make the _current file relative to DBRMRoot
    string relative = prefix.substr(prefix.find_last_of('/') + 1);
    currentFile->write(relative.c_str(), relative.length());
  }
  catch (exception& e)
  {
    cerr << "Error: failed to write to " << currentFilename << ": " << e.what() << endl;
    exit(1);
  }

  try
  {
    delete currentFile;
    currentFile = NULL;
  }
  catch (exception& e)
  {
    cerr << "Error: failed to close " << currentFilename << ": " << e.what() << endl;
    exit(1);
  }

  return 0;
}