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//
// TCPServerDispatcher.cpp
//
// Library: Net
// Package: TCPServer
// Module: TCPServerDispatcher
//
// Copyright (c) 2005-2007, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Net/TCPServerDispatcher.h"
#include "Poco/Net/TCPServerConnectionFactory.h"
#include "Poco/Notification.h"
#include "Poco/AutoPtr.h"
#include <memory>
using Poco::Notification;
using Poco::FastMutex;
using Poco::AutoPtr;
namespace Poco {
namespace Net {
class TCPConnectionNotification: public Notification
{
public:
TCPConnectionNotification(const StreamSocket& socket):
_socket(socket)
{
}
~TCPConnectionNotification()
{
}
const StreamSocket& socket() const
{
return _socket;
}
private:
StreamSocket _socket;
};
TCPServerDispatcher::TCPServerDispatcher(TCPServerConnectionFactory::Ptr pFactory, Poco::ThreadPool& threadPool, TCPServerParams::Ptr pParams):
_rc(1),
_pParams(pParams),
_currentThreads(0),
_totalConnections(0),
_currentConnections(0),
_maxConcurrentConnections(0),
_refusedConnections(0),
_stopped(false),
_pConnectionFactory(pFactory),
_threadPool(threadPool)
{
poco_check_ptr (pFactory);
if (!_pParams)
_pParams = new TCPServerParams;
if (_pParams->getMaxThreads() == 0)
_pParams->setMaxThreads(threadPool.capacity());
}
TCPServerDispatcher::~TCPServerDispatcher()
{
}
void TCPServerDispatcher::duplicate()
{
_mutex.lock();
++_rc;
_mutex.unlock();
}
void TCPServerDispatcher::release()
{
_mutex.lock();
int rc = --_rc;
_mutex.unlock();
if (rc == 0) delete this;
}
void TCPServerDispatcher::run()
{
try
{
AutoPtr<TCPServerDispatcher> guard(this, true); // ensure object stays alive
int idleTime = (int) _pParams->getThreadIdleTime().totalMilliseconds();
for (;;)
{
AutoPtr<Notification> pNf = _queue.waitDequeueNotification(idleTime);
if (pNf)
{
TCPConnectionNotification* pCNf = dynamic_cast<TCPConnectionNotification*>(pNf.get());
if (pCNf)
{
#ifndef POCO_ENABLE_CPP11
std::auto_ptr<TCPServerConnection> pConnection(_pConnectionFactory->createConnection(pCNf->socket()));
#else
std::unique_ptr<TCPServerConnection> pConnection(_pConnectionFactory->createConnection(pCNf->socket()));
#endif // POCO_ENABLE_CPP11
poco_check_ptr(pConnection.get());
beginConnection();
pConnection->start();
endConnection();
}
}
FastMutex::ScopedLock lock(_mutex);
if (_stopped || (_currentThreads > 1 && _queue.empty()))
{
--_currentThreads;
break;
}
}
}
catch (...)
{
FastMutex::ScopedLock lock(_mutex);
--_currentThreads;
throw;
}
}
namespace
{
static const std::string threadName("TCPServerConnection");
}
void TCPServerDispatcher::enqueue(const StreamSocket& socket)
{
FastMutex::ScopedLock lock(_mutex);
if (_queue.size() < _pParams->getMaxQueued())
{
if (!_queue.hasIdleThreads() && _currentThreads < _pParams->getMaxThreads())
{
try
{
_threadPool.startWithPriority(_pParams->getThreadPriority(), *this, threadName);
++_currentThreads;
}
catch (Poco::Exception&)
{
++_refusedConnections;
return;
}
}
_queue.enqueueNotification(new TCPConnectionNotification(socket));
}
else
{
++_refusedConnections;
}
}
void TCPServerDispatcher::stop()
{
_stopped = true;
_queue.clear();
_queue.wakeUpAll();
}
int TCPServerDispatcher::currentThreads() const
{
FastMutex::ScopedLock lock(_mutex);
return _currentThreads;
}
int TCPServerDispatcher::maxThreads() const
{
FastMutex::ScopedLock lock(_mutex);
return _threadPool.capacity();
}
int TCPServerDispatcher::totalConnections() const
{
FastMutex::ScopedLock lock(_mutex);
return _totalConnections;
}
int TCPServerDispatcher::currentConnections() const
{
FastMutex::ScopedLock lock(_mutex);
return _currentConnections;
}
int TCPServerDispatcher::maxConcurrentConnections() const
{
FastMutex::ScopedLock lock(_mutex);
return _maxConcurrentConnections;
}
int TCPServerDispatcher::queuedConnections() const
{
return _queue.size();
}
int TCPServerDispatcher::refusedConnections() const
{
FastMutex::ScopedLock lock(_mutex);
return _refusedConnections;
}
void TCPServerDispatcher::beginConnection()
{
FastMutex::ScopedLock lock(_mutex);
++_totalConnections;
++_currentConnections;
if (_currentConnections > _maxConcurrentConnections)
_maxConcurrentConnections = _currentConnections;
}
void TCPServerDispatcher::endConnection()
{
FastMutex::ScopedLock lock(_mutex);
--_currentConnections;
}
} } // namespace Poco::Net
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