e0d243dcec
Mainly taming gcc4.0.1 (anonymous enum bug) 2.Input plug-ins now have .input extension on all platforms
132 lines
3.7 KiB
C++
132 lines
3.7 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) 2006 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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//$Id: connection_manager.hpp 17 2005-03-08 23:58:43Z pavlenko $
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#ifndef CONNECTION_MANAGER_HPP
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#define CONNECTION_MANAGER_HPP
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#include <string>
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#include <mapnik/pool.hpp>
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#include <mapnik/utils.hpp>
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#include "connection.hpp"
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#include <boost/shared_ptr.hpp>
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#include <boost/thread/mutex.hpp>
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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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using std::string;
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using boost::mutex;
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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(string const& host,
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string const& port,
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string const& dbname,
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string const& user,
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string const& pass)
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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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T* operator()() const
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{
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return new T(host_,port_,dbname_,user_,pass_);
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}
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std::string id() const
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{
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return host_ + ":"
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+ dbname_ + ":"
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+ port_ +":"
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+ user_ ;
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}
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private:
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string host_;
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string port_;
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string dbname_;
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string user_;
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string pass_;
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};
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class ConnectionManager : public singleton <ConnectionManager,CreateStatic>
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{
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friend class CreateStatic<ConnectionManager>;
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typedef Pool<Connection,ConnectionCreator> PoolType;
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typedef std::map<std::string,boost::shared_ptr<PoolType> > ContType;
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typedef boost::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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mutex::scoped_lock lock(mutex_);
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if (pools_.find(creator.id())==pools_.end())
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{
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return pools_.insert(std::make_pair(creator.id(),
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boost::shared_ptr<PoolType>(new PoolType(creator,initialSize,maxSize)))).second;
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}
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return false;
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}
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boost::shared_ptr<PoolType> getPool(std::string const& key)
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{
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mutex::scoped_lock lock(mutex_);
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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 boost::shared_ptr<PoolType> emptyPool;
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return emptyPool;
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}
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HolderType get(std::string const& key)
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{
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mutex::scoped_lock lock(mutex_);
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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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boost::shared_ptr<PoolType> pool=itr->second;
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return pool->borrowObject();
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}
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return HolderType();
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}
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private:
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ConnectionManager() {}
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ConnectionManager(const ConnectionManager&);
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ConnectionManager& operator=(const ConnectionManager);
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};
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#endif //CONNECTION_MANAGER_HPP
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