mariadb-columnstore-engine/oamapps/columnstoreDB/columnstoreDB.cpp

/* Copyright (C) 2014 InfiniDB, Inc.
   Copyright (C) 2016 MariaDB Corporation

   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: columnstoreDB.cpp 419 2007-07-22 17:18:00Z dhill $
 *
 ******************************************************************************************/
/**
 * @file
 */

#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string>
#include <limits.h>
#include <sstream>
#include <exception>
#include <stdexcept>
#include <vector>
#include <stdio.h>
#include <ctype.h>
#include <sys/signal.h>
#include <sys/types.h>

#include "liboamcpp.h"
#include "configcpp.h"
#include "installdir.h"

using namespace std;
using namespace oam;
using namespace config;

namespace
{

void usage(char* prog)
{

    cout << endl;
    cout << "Usage: " << prog << " [options]" << endl;

    cout << endl;
    cout << "This utility is used to suspend and resume Columnstore Database Writes." << endl;
    cout << "Normally this would be done while performing Database Backups and" << endl;
    cout << "Restores " << endl;
    cout << endl;

    cout << "Options:" << endl;
    cout << "-c <command>   Command: suspend or resume" << endl << endl;
    cout << "-h             Display this help." << endl << endl;
}
}

int main(int argc, char** argv)
{
    string command;
    Oam oam;
    BRM::DBRM dbrm;

    char c;

    // Invokes member function `int operator ()(void);'
    while ((c = getopt(argc, argv, "c:h")) != -1)
    {
        switch (c)
        {
            case 'c':
                command = optarg;
                break;

            case 'h':
                usage(argv[0]);
                exit(-1);
                break;

            default:
                usage(argv[0]);
                exit(1);
                break;
        }
    }

    if ( command == "suspend" )
    {
        try
        {
            std::vector<BRM::TableLockInfo> tableLocks = dbrm.getAllTableLocks();

            if (!tableLocks.empty())
            {
                oam.DisplayLockedTables(tableLocks, &dbrm);
            }
            else
            {
                dbrm.setSystemSuspended(true);
                sleep(5);
                string cmd = "save_brm  > /var/log/mariadb/columnstore/save_brm.log1 2>&1";
                int rtnCode = system(cmd.c_str());

                if (rtnCode == 0)
                {
                    cout << endl << "Suspend Columnstore Database Writes Request successfully completed" << endl;
                }
                else
                {
                    cout << endl << "Suspend Columnstore Database Writes Failed: save_brm Failed" << endl;
                    dbrm.setSystemSuspended(false);
                }
            }
        }
        catch (exception& e)
        {
            cout << endl << "**** Suspend Columnstore Database Writes Failed: " << e.what() << endl;
        }
        catch (...)
        {
            cout << endl << "**** Suspend Columnstore Database Writes Failed" << endl;
        }
    }
    else
    {
        if ( command == "resume" )
        {
            try
            {
                dbrm.setSystemSuspended(false);
                cout << endl << "Resume Columnstore Database Writes Request successfully completed" << endl;
            }
            catch (exception& e)
            {
                cout << endl << "**** Resume Columnstore Database Writes Failed: " << e.what() << endl;
            }
            catch (...)
            {
                cout << endl << "**** Resume Columnstore Database Writes Failed" << endl;
            }
        }
        else
        {
            cout << "Invalid Command Entered, please try again" << endl;
            exit(-1);
        }
    }

    exit(0);
}