khanat-opennel-code/code/nelns/login_service/mysql_helper.cpp

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2013-11-13 19:31:08 +00:00
// NeLNS - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "nel/misc/types_nl.h"
#include "nel/net/service.h"
#include "mysql_helper.h"
#include "mysql_version.h"
//
// Namespaces
//
using namespace std;
using namespace NLMISC;
using namespace NLNET;
//
// Variables
//
static string DatabaseName, DatabaseHost, DatabaseLogin, DatabasePassword;
MYSQL *DatabaseConnection = NULL;
//
// Functions
//
string sqlQuery(const string &query)
{
CMysqlResult result;
MYSQL_ROW row;
sint32 nbrow;
return sqlQuery(query, nbrow, row, result);
}
string sqlQuery(const string &query, sint32 &nbRow, MYSQL_ROW &firstRow, CMysqlResult &result)
{
nlassert(DatabaseConnection);
//nlinfo("sqlQuery: '%s'", query.c_str());
sint ret = mysql_query(DatabaseConnection, query.c_str());
if(ret != 0)
{
nlwarning("mysql_query() failed: '%s' (%s)", mysql_error(DatabaseConnection), query.c_str());
return toString("mysql_query() failed: '%s' (%s)", mysql_error(DatabaseConnection), query.c_str());
}
if(query.find("select") == 0)
{
// store result on select query
result = mysql_store_result(DatabaseConnection);
if(result == 0)
{
nlwarning("mysql_store_result() failed: '%s' (%s)", mysql_error(DatabaseConnection), query.c_str ());
return toString("mysql_store_result() failed: '%s' (%s)", mysql_error(DatabaseConnection), query.c_str ());
}
nbRow = (sint32)mysql_num_rows(result);
if(nbRow > 0)
{
firstRow = mysql_fetch_row(result);
if(firstRow == 0)
{
nlwarning("mysql_fetch_row failed: %s (%s)", mysql_error(DatabaseConnection), query.c_str());
return toString("mysql_fetch_row failed: %s (%s)", mysql_error(DatabaseConnection), query.c_str());
}
}
else
{
firstRow = 0;
}
}
return "";
}
string resetDatabase()
{
// Reset all shards database
string reason = sqlQuery("update shard set NbPlayers=0, Online=0");
if(!reason.empty()) return reason;
// Reset all user database
reason = sqlQuery("update user set State='Offline', ShardId=-1, Cookie='' where State!='Offline'");
if(!reason.empty()) return reason;
return "";
}
static void cbDatabaseVar(CConfigFile::CVar &var)
{
DatabaseName = IService::getInstance()->ConfigFile.getVar("DatabaseName").asString ();
DatabaseHost = IService::getInstance()->ConfigFile.getVar("DatabaseHost").asString ();
DatabaseLogin = IService::getInstance()->ConfigFile.getVar("DatabaseLogin").asString ();
DatabasePassword = IService::getInstance()->ConfigFile.getVar("DatabasePassword").asString ();
if(DatabaseConnection)
{
mysql_close(DatabaseConnection);
DatabaseConnection = 0;
}
MYSQL *db = mysql_init(0);
if(db == 0)
{
nlwarning("mysql_init() failed");
return;
}
my_bool opt = true;
if (mysql_options (db, MYSQL_OPT_RECONNECT, &opt))
{
mysql_close(db);
DatabaseConnection = 0;
nlerror("mysql_options() failed for database connection to '%s'", DatabaseHost.c_str());
return;
}
DatabaseConnection = mysql_real_connect(db, DatabaseHost.c_str(), DatabaseLogin.c_str(), DatabasePassword.c_str(), DatabaseName.c_str(),0,0,0);
if (DatabaseConnection == 0 || DatabaseConnection != db)
{
mysql_close(db);
DatabaseConnection = 0;
nlerror("mysql_real_connect() failed to '%s' with login '%s' and database name '%s'", DatabaseHost.c_str(), DatabaseLogin.c_str(), DatabaseName.c_str());
return;
}
#if MYSQL_VERSION_ID < 50019
opt = true;
if (mysql_options (DatabaseConnection, MYSQL_OPT_RECONNECT, &opt))
{
mysql_close(db);
DatabaseConnection = 0;
nlerror("mysql_options() failed for database connection to '%s'", DatabaseHost.c_str());
return;
}
#endif
sqlQuery("set names utf8");
}
void sqlInit()
{
IService::getInstance()->ConfigFile.setCallback ("ForceDatabaseReconnection", cbDatabaseVar);
cbDatabaseVar (IService::getInstance()->ConfigFile.getVar ("ForceDatabaseReconnection"));
resetDatabase();
}