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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/>.
*/
#ifndef SocketMgr_h__
#define SocketMgr_h__
#include "AsyncAcceptor.h"
#include "Errors.h"
#include "NetworkThread.h"
#include <boost/asio/ip/tcp.hpp>
#include <memory>
using boost::asio::ip::tcp;
template<class SocketType>
class SocketMgr
{
public:
virtual ~SocketMgr()
{
ASSERT(!_threads && !_acceptor && !_threadCount, "StopNetwork must be called prior to SocketMgr destruction");
}
virtual bool StartNetwork(Acore::Asio::IoContext& ioContext, std::string const& bindIp, uint16 port, int threadCount)
{
ASSERT(threadCount > 0);
std::unique_ptr<AsyncAcceptor> acceptor;
try
{
acceptor = std::make_unique<AsyncAcceptor>(ioContext, bindIp, port);
}
catch (boost::system::system_error const& err)
{
LOG_ERROR("network", "Exception caught in SocketMgr.StartNetwork ({}:{}): {}", bindIp, port, err.what());
return false;
}
if (!acceptor->Bind())
{
LOG_ERROR("network", "StartNetwork failed to bind socket acceptor");
return false;
}
_acceptor = std::move(acceptor);
_threadCount = threadCount;
_threads = std::unique_ptr<NetworkThread<SocketType>[]>(CreateThreads());
ASSERT(_threads);
for (int32 i = 0; i < _threadCount; ++i)
_threads[i].Start();
_acceptor->SetSocketFactory([this]() { return GetSocketForAccept(); });
return true;
}
virtual void StopNetwork()
{
_acceptor->Close();
for (int32 i = 0; i < _threadCount; ++i)
_threads[i].Stop();
Wait();
_acceptor.reset();
_threads.reset();
_threadCount = 0;
}
void Wait()
{
for (int32 i = 0; i < _threadCount; ++i)
_threads[i].Wait();
}
virtual void OnSocketOpen(tcp::socket&& sock, uint32 threadIndex)
{
try
{
std::shared_ptr<SocketType> newSocket = std::make_shared<SocketType>(std::move(sock));
_threads[threadIndex].AddSocket(newSocket);
}
catch (boost::system::system_error const& err)
{
LOG_WARN("network", "Failed to retrieve client's remote address {}", err.what());
}
}
[[nodiscard]] int32 GetNetworkThreadCount() const { return _threadCount; }
[[nodiscard]] uint32 SelectThreadWithMinConnections() const
{
uint32 min = 0;
for (int32 i = 1; i < _threadCount; ++i)
if (_threads[i].GetConnectionCount() < _threads[min].GetConnectionCount())
min = i;
return min;
}
std::pair<tcp::socket*, uint32> GetSocketForAccept()
{
uint32 threadIndex = SelectThreadWithMinConnections();
return { _threads[threadIndex].GetSocketForAccept(), threadIndex };
}
protected:
SocketMgr() = default;
virtual NetworkThread<SocketType>* CreateThreads() const = 0;
std::unique_ptr<AsyncAcceptor> _acceptor;
std::unique_ptr<NetworkThread<SocketType>[]> _threads;
int32 _threadCount{};
};
#endif // SocketMgr_h__
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