152 lines
4.5 KiB
C++
152 lines
4.5 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2011 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef POSTGIS_CONNECTION_MANAGER_HPP
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#define POSTGIS_CONNECTION_MANAGER_HPP
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#include "connection.hpp"
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// mapnik
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#include <mapnik/pool.hpp>
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#include <mapnik/utils.hpp>
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// boost
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#include <memory>
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#include <boost/optional.hpp>
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// stl
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#include <string>
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#include <sstream>
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#include <memory>
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using mapnik::Pool;
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using mapnik::singleton;
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using mapnik::CreateStatic;
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template <typename T>
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class ConnectionCreator
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{
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public:
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ConnectionCreator(boost::optional<std::string> const& host,
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boost::optional<std::string> const& port,
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boost::optional<std::string> const& dbname,
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boost::optional<std::string> const& user,
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boost::optional<std::string> const& pass,
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boost::optional<std::string> const& connect_timeout)
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: host_(host),
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port_(port),
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dbname_(dbname),
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user_(user),
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pass_(pass),
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connect_timeout_(connect_timeout) {}
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T* operator()() const
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{
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return new T(connection_string_safe(),pass_);
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}
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inline std::string id() const
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{
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return connection_string();
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}
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inline std::string connection_string() const
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{
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std::string connect_str = connection_string_safe();
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if (pass_ && !pass_->empty()) connect_str += " password=" + *pass_;
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return connect_str;
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}
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inline std::string connection_string_safe() const
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{
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std::string connect_str;
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if (host_ && !host_->empty()) connect_str += "host=" + *host_;
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if (port_ && !port_->empty()) connect_str += " port=" + *port_;
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if (dbname_ && !dbname_->empty()) connect_str += " dbname=" + *dbname_;
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if (user_ && !user_->empty()) connect_str += " user=" + *user_;
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if (connect_timeout_ && !connect_timeout_->empty())
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connect_str +=" connect_timeout=" + *connect_timeout_;
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return connect_str;
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}
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private:
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boost::optional<std::string> host_;
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boost::optional<std::string> port_;
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boost::optional<std::string> dbname_;
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boost::optional<std::string> user_;
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boost::optional<std::string> pass_;
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boost::optional<std::string> connect_timeout_;
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};
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class ConnectionManager : public singleton <ConnectionManager,CreateStatic>
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{
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public:
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typedef Pool<Connection,ConnectionCreator> PoolType;
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private:
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friend class CreateStatic<ConnectionManager>;
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typedef std::map<std::string,std::shared_ptr<PoolType> > ContType;
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typedef std::shared_ptr<Connection> HolderType;
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ContType pools_;
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public:
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bool registerPool(const ConnectionCreator<Connection>& creator,unsigned initialSize,unsigned maxSize)
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{
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ContType::const_iterator itr = pools_.find(creator.id());
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if (itr != pools_.end())
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{
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itr->second->set_initial_size(initialSize);
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itr->second->set_max_size(maxSize);
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}
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else
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{
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return pools_.insert(
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std::make_pair(creator.id(),
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std::make_shared<PoolType>(creator,initialSize,maxSize))).second;
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}
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return false;
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}
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std::shared_ptr<PoolType> getPool(std::string const& key)
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{
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ContType::const_iterator itr=pools_.find(key);
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if (itr!=pools_.end())
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{
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return itr->second;
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}
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static const std::shared_ptr<PoolType> emptyPool;
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return emptyPool;
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}
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ConnectionManager() {}
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private:
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ConnectionManager(const ConnectionManager&);
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ConnectionManager& operator=(const ConnectionManager);
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};
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#endif // POSTGIS_CONNECTION_MANAGER_HPP
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