ab05de48df
- Password is not necessary for connection identification - When password is not required by the database, user can accidentally use multiple different passwords without noticing. This leads to allocating more connection pools and increase of connection consumption.
152 lines
4.5 KiB
C++
152 lines
4.5 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2017 Artem Pavlenko
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#ifndef POSTGIS_CONNECTION_MANAGER_HPP
|
|
#define POSTGIS_CONNECTION_MANAGER_HPP
|
|
|
|
#include "connection.hpp"
|
|
|
|
// mapnik
|
|
#include <mapnik/pool.hpp>
|
|
#include <mapnik/util/singleton.hpp>
|
|
|
|
// boost
|
|
#include <memory>
|
|
#include <boost/optional.hpp>
|
|
|
|
// stl
|
|
#include <string>
|
|
#include <sstream>
|
|
#include <memory>
|
|
|
|
using mapnik::Pool;
|
|
using mapnik::singleton;
|
|
using mapnik::CreateStatic;
|
|
|
|
template <typename T>
|
|
class ConnectionCreator
|
|
{
|
|
|
|
public:
|
|
ConnectionCreator(boost::optional<std::string> const& host,
|
|
boost::optional<std::string> const& port,
|
|
boost::optional<std::string> const& dbname,
|
|
boost::optional<std::string> const& user,
|
|
boost::optional<std::string> const& pass,
|
|
boost::optional<std::string> const& connect_timeout)
|
|
: host_(host),
|
|
port_(port),
|
|
dbname_(dbname),
|
|
user_(user),
|
|
pass_(pass),
|
|
connect_timeout_(connect_timeout) {}
|
|
|
|
T* operator()() const
|
|
{
|
|
return new T(connection_string_safe(),pass_);
|
|
}
|
|
|
|
inline std::string id() const
|
|
{
|
|
return connection_string_safe();
|
|
}
|
|
|
|
inline std::string connection_string() const
|
|
{
|
|
std::string connect_str = connection_string_safe();
|
|
if (pass_ && !pass_->empty()) connect_str += " password=" + *pass_;
|
|
return connect_str;
|
|
}
|
|
|
|
inline std::string connection_string_safe() const
|
|
{
|
|
std::string connect_str;
|
|
if (host_ && !host_->empty()) connect_str += "host=" + *host_;
|
|
if (port_ && !port_->empty()) connect_str += " port=" + *port_;
|
|
if (dbname_ && !dbname_->empty()) connect_str += " dbname=" + *dbname_;
|
|
if (user_ && !user_->empty()) connect_str += " user=" + *user_;
|
|
if (connect_timeout_ && !connect_timeout_->empty())
|
|
connect_str +=" connect_timeout=" + *connect_timeout_;
|
|
return connect_str;
|
|
}
|
|
|
|
private:
|
|
boost::optional<std::string> host_;
|
|
boost::optional<std::string> port_;
|
|
boost::optional<std::string> dbname_;
|
|
boost::optional<std::string> user_;
|
|
boost::optional<std::string> pass_;
|
|
boost::optional<std::string> connect_timeout_;
|
|
};
|
|
|
|
class ConnectionManager : public singleton <ConnectionManager,CreateStatic>
|
|
{
|
|
|
|
public:
|
|
using PoolType = Pool<Connection,ConnectionCreator>;
|
|
|
|
private:
|
|
friend class CreateStatic<ConnectionManager>;
|
|
|
|
using ContType = std::map<std::string,std::shared_ptr<PoolType> >;
|
|
using HolderType = std::shared_ptr<Connection>;
|
|
ContType pools_;
|
|
|
|
public:
|
|
|
|
bool registerPool(ConnectionCreator<Connection> const& creator,unsigned initialSize,unsigned maxSize)
|
|
{
|
|
ContType::const_iterator itr = pools_.find(creator.id());
|
|
|
|
if (itr != pools_.end())
|
|
{
|
|
itr->second->set_initial_size(initialSize);
|
|
itr->second->set_max_size(maxSize);
|
|
}
|
|
else
|
|
{
|
|
return pools_.insert(
|
|
std::make_pair(creator.id(),
|
|
std::make_shared<PoolType>(creator,initialSize,maxSize))).second;
|
|
}
|
|
return false;
|
|
|
|
}
|
|
|
|
std::shared_ptr<PoolType> getPool(std::string const& key)
|
|
{
|
|
ContType::const_iterator itr=pools_.find(key);
|
|
if (itr!=pools_.end())
|
|
{
|
|
return itr->second;
|
|
}
|
|
static const std::shared_ptr<PoolType> emptyPool;
|
|
return emptyPool;
|
|
}
|
|
|
|
ConnectionManager() {}
|
|
private:
|
|
ConnectionManager(const ConnectionManager&);
|
|
ConnectionManager& operator=(const ConnectionManager);
|
|
};
|
|
|
|
#endif // POSTGIS_CONNECTION_MANAGER_HPP
|