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/*
* This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
*
* 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 General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "DatabaseLoader.h"
#include "Config.h"
#include "DBUpdater.h"
#include "DatabaseEnv.h"
#include "Duration.h"
#include "Log.h"
#include <errmsg.h>
#include <mysqld_error.h>
#include <thread>
DatabaseLoader::DatabaseLoader(std::string const& logger, uint32 const defaultUpdateMask, std::string_view modulesList)
: _logger(logger),
_modulesList(modulesList),
_autoSetup(sConfigMgr->GetOption<bool>("Updates.AutoSetup", true)),
_updateFlags(sConfigMgr->GetOption<uint32>("Updates.EnableDatabases", defaultUpdateMask)) { }
template <class T>
DatabaseLoader& DatabaseLoader::AddDatabase(DatabaseWorkerPool<T>& pool, std::string const& name)
{
bool const updatesEnabledForThis = DBUpdater<T>::IsEnabled(_updateFlags);
_open.push([this, name, updatesEnabledForThis, &pool]() -> bool
{
std::string const dbString = sConfigMgr->GetOption<std::string>(name + "DatabaseInfo", "");
if (dbString.empty())
{
LOG_ERROR(_logger, "Database %s not specified in configuration file!", name.c_str());
return false;
}
uint8 const asyncThreads = sConfigMgr->GetOption<uint8>(name + "Database.WorkerThreads", 1);
if (asyncThreads < 1 || asyncThreads > 32)
{
LOG_ERROR(_logger, "%s database: invalid number of worker threads specified. "
"Please pick a value between 1 and 32.", name.c_str());
return false;
}
uint8 const synchThreads = sConfigMgr->GetOption<uint8>(name + "Database.SynchThreads", 1);
pool.SetConnectionInfo(dbString, asyncThreads, synchThreads);
if (uint32 error = pool.Open())
{
// Try reconnect
if (error == CR_CONNECTION_ERROR)
{
uint8 const attempts = sConfigMgr->GetOption<uint8>("Database.Reconnect.Attempts", 20);
Seconds reconnectSeconds = Seconds(sConfigMgr->GetOption<uint8>("Database.Reconnect.Seconds", 15));
uint8 reconnectCount = 0;
while (reconnectCount < attempts)
{
LOG_INFO(_logger, "> Retrying after %u seconds", static_cast<uint32>(reconnectSeconds.count()));
std::this_thread::sleep_for(reconnectSeconds);
error = pool.Open();
if (error == CR_CONNECTION_ERROR)
{
reconnectCount++;
}
else
{
break;
}
}
}
// Database does not exist
if ((error == ER_BAD_DB_ERROR) && updatesEnabledForThis && _autoSetup && !sConfigMgr->isDryRun())
{
// Try to create the database and connect again if auto setup is enabled
if (DBUpdater<T>::Create(pool) && (!pool.Open()))
{
error = 0;
}
}
// If the error wasn't handled quit
if (error)
{
LOG_ERROR(_logger, "DatabasePool %s NOT opened. There were errors opening the MySQL connections. "
"Check your log file for specific errors", name.c_str());
return false;
}
}
// Add the close operation
_close.push([&pool]
{
pool.Close();
});
return true;
});
// Populate and update only if updates are enabled for this pool
if (updatesEnabledForThis && !sConfigMgr->isDryRun())
{
_populate.push([this, name, &pool]() -> bool
{
if (!DBUpdater<T>::Populate(pool))
{
LOG_ERROR(_logger, "Could not populate the %s database, see log for details.", name.c_str());
return false;
}
return true;
});
_update.push([this, name, &pool]() -> bool
{
if (!DBUpdater<T>::Update(pool, _modulesList))
{
LOG_ERROR(_logger, "Could not update the %s database, see log for details.", name.c_str());
return false;
}
return true;
});
}
_prepare.push([this, name, &pool]() -> bool
{
if (!pool.PrepareStatements())
{
LOG_ERROR(_logger, "Could not prepare statements of the %s database, see log for details.", name.c_str());
return false;
}
return true;
});
return *this;
}
bool DatabaseLoader::Load()
{
return OpenDatabases() && PopulateDatabases() && UpdateDatabases() && PrepareStatements();
}
bool DatabaseLoader::OpenDatabases()
{
return Process(_open);
}
bool DatabaseLoader::PopulateDatabases()
{
return Process(_populate);
}
bool DatabaseLoader::UpdateDatabases()
{
return Process(_update);
}
bool DatabaseLoader::PrepareStatements()
{
return Process(_prepare);
}
bool DatabaseLoader::Process(std::queue<Predicate>& queue)
{
while (!queue.empty())
{
if (!queue.front()())
{
// Close all open databases which have a registered close operation
while (!_close.empty())
{
_close.top()();
_close.pop();
}
return false;
}
queue.pop();
}
return true;
}
template AC_DATABASE_API
DatabaseLoader& DatabaseLoader::AddDatabase<LoginDatabaseConnection>(DatabaseWorkerPool<LoginDatabaseConnection>&, std::string const&);
template AC_DATABASE_API
DatabaseLoader& DatabaseLoader::AddDatabase<CharacterDatabaseConnection>(DatabaseWorkerPool<CharacterDatabaseConnection>&, std::string const&);
template AC_DATABASE_API
DatabaseLoader& DatabaseLoader::AddDatabase<WorldDatabaseConnection>(DatabaseWorkerPool<WorldDatabaseConnection>&, std::string const&);
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