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/*
* Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
* Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
*/
#include "DatabaseLoader.h"
#include "Config.h"
#include "DatabaseEnv.h"
#include "Log.h"
#include "Duration.h"
#include <mysqld_error.h>
#include <errmsg.h>
template <class T>
DatabaseLoader& DatabaseLoader::AddDatabase(DatabaseWorkerPool<T>& pool, std::string const& name)
{
_open.push([this, name, &pool]() -> bool
{
std::string const dbString = sConfigMgr->GetOption<std::string>(name + "DatabaseInfo", "");
if (dbString.empty())
{
sLog->outSQLDriver("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)
{
sLog->outSQLDriver("%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)
{
// Possible improvement for future: make ATTEMPTS and SECONDS configurable values
uint32 const ATTEMPTS = 5;
Seconds durationSecs = 5s;
uint32 count = 1;
auto sleepThread = [&]()
{
sLog->outSQLDriver("> Retrying after %u seconds", durationSecs.count());
std::this_thread::sleep_for(durationSecs);
};
sleepThread();
do
{
error = pool.Open();
if (error == CR_CONNECTION_ERROR)
{
sleepThread();
count++;
}
else
{
break;
}
} while (count < ATTEMPTS);
}
// If the error wasn't handled quit
if (error)
{
sLog->outSQLDriver("DatabasePool %s NOT opened. There were errors opening the MySQL connections. Check your SQLDriverLogFile for specific errors", name.c_str());
return false;
}
}
// Add the close operation
_close.push([&pool]
{
pool.Close();
});
return true;
});
_prepare.push([name, &pool]() -> bool
{
if (!pool.PrepareStatements())
{
sLog->outSQLDriver("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() && PrepareStatements();
}
bool DatabaseLoader::OpenDatabases()
{
return Process(_open);
}
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 DatabaseLoader& DatabaseLoader::AddDatabase<LoginDatabaseConnection>(DatabaseWorkerPool<LoginDatabaseConnection>&, std::string const&);
template DatabaseLoader& DatabaseLoader::AddDatabase<CharacterDatabaseConnection>(DatabaseWorkerPool<CharacterDatabaseConnection>&, std::string const&);
template DatabaseLoader& DatabaseLoader::AddDatabase<WorldDatabaseConnection>(DatabaseWorkerPool<WorldDatabaseConnection>&, std::string const&);
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