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/*
* This file is part of nzbget
*
* Copyright (C) 2004 Sven Henkel <sidddy@users.sourceforge.net>
* Copyright (C) 2007-2009 Andrei Prygounkov <hugbug@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $Revision: 323 $
* $Date: 2009-05-27 23:09:08 +0200 (Wed, 27 May 2009) $
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef WIN32
#include "win32.h"
#endif
#include <stdlib.h>
#include <string.h>
#ifndef WIN32
#include <unistd.h>
#include <errno.h>
#endif
#include "nzbget.h"
#include "ServerPool.h"
#include "Log.h"
static const int CONNECTION_HOLD_SECODNS = 5;
ServerPool::PooledConnection::PooledConnection(NewsServer* server) : NNTPConnection(server)
{
m_bInUse = false;
m_tFreeTime = 0;
}
ServerPool::ServerPool()
{
debug("Creating ServerPool");
m_iMaxLevel = 0;
m_iTimeout = 60;
}
ServerPool::~ ServerPool()
{
debug("Destroying ServerPool");
m_Levels.clear();
for (Servers::iterator it = m_Servers.begin(); it != m_Servers.end(); it++)
{
delete *it;
}
m_Servers.clear();
for (Connections::iterator it = m_Connections.begin(); it != m_Connections.end(); it++)
{
delete *it;
}
m_Connections.clear();
}
void ServerPool::AddServer(NewsServer* pNewsServer)
{
debug("Adding server to ServerPool");
m_Servers.push_back(pNewsServer);
}
void ServerPool::InitConnections()
{
debug("Initializing connections in ServerPool");
m_iMaxLevel = 0;
for (Servers::iterator it = m_Servers.begin(); it != m_Servers.end(); it++)
{
NewsServer* pNewsServer = *it;
if (m_iMaxLevel < pNewsServer->GetLevel())
{
m_iMaxLevel = pNewsServer->GetLevel();
}
for (int i = 0; i < pNewsServer->GetMaxConnections(); i++)
{
PooledConnection* pConnection = new PooledConnection(pNewsServer);
pConnection->SetTimeout(m_iTimeout);
m_Connections.push_back(pConnection);
}
}
for (int iLevel = 0; iLevel <= m_iMaxLevel; iLevel++)
{
int iMaxConnectionsForLevel = 0;
for (Servers::iterator it = m_Servers.begin(); it != m_Servers.end(); it++)
{
NewsServer* pNewsServer = *it;
if (iLevel == pNewsServer->GetLevel())
{
iMaxConnectionsForLevel += pNewsServer->GetMaxConnections();
}
}
m_Levels.push_back(iMaxConnectionsForLevel);
}
}
NNTPConnection* ServerPool::GetConnection(int iLevel)
{
PooledConnection* pConnection = NULL;
m_mutexConnections.Lock();
if (m_Levels[iLevel] > 0)
{
for (Connections::iterator it = m_Connections.begin(); it != m_Connections.end(); it++)
{
PooledConnection* pConnection1 = *it;
if (!pConnection1->GetInUse() && pConnection1->GetNewsServer()->GetLevel() == iLevel)
{
// free connection found, take it!
pConnection = pConnection1;
pConnection->SetInUse(true);
break;
}
}
m_Levels[iLevel]--;
if (!pConnection)
{
error("ServerPool: internal error, no free connection found, but there should be one");
}
}
m_mutexConnections.Unlock();
return pConnection;
}
void ServerPool::FreeConnection(NNTPConnection* pConnection, bool bUsed)
{
if (bUsed)
{
debug("Freeing used connection");
}
m_mutexConnections.Lock();
((PooledConnection*)pConnection)->SetInUse(false);
if (bUsed)
{
((PooledConnection*)pConnection)->SetFreeTimeNow();
}
m_Levels[pConnection->GetNewsServer()->GetLevel()]++;
m_mutexConnections.Unlock();
}
void ServerPool::CloseUnusedConnections()
{
m_mutexConnections.Lock();
time_t curtime = ::time(NULL);
for (Connections::iterator it = m_Connections.begin(); it != m_Connections.end(); it++)
{
PooledConnection* pConnection = *it;
if (!pConnection->GetInUse() && pConnection->GetStatus() == Connection::csConnected)
{
int tdiff = (int)(curtime - pConnection->GetFreeTime());
if (tdiff > CONNECTION_HOLD_SECODNS)
{
debug("Closing unused connection to %s", pConnection->GetNewsServer()->GetHost());
pConnection->Disconnect();
}
}
}
m_mutexConnections.Unlock();
}
void ServerPool::LogDebugInfo()
{
debug(" ServerPool");
debug(" ----------------");
debug(" Max-Level: %i", m_iMaxLevel);
m_mutexConnections.Lock();
debug(" Connections: %i", m_Connections.size());
for (Connections::iterator it = m_Connections.begin(); it != m_Connections.end(); it++)
{
debug(" Connection: Level=%i, InUse:%i", (*it)->GetNewsServer()->GetLevel(), (int)(*it)->GetInUse());
}
m_mutexConnections.Unlock();
}
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