/usr/include/tntdb/connectionpool.h is in libtntdb-dev 1.3-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2006 Tommi Maekitalo
*
* 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.
*
* As a special exception, you may use this file as part of a free
* software library without restriction. Specifically, if other files
* instantiate templates or use macros or inline functions from this
* file, or you compile this file and link it with other files to
* produce an executable, this file does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. This exception does not however invalidate any other
* reasons why the executable file might be covered by the GNU Library
* General Public License.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef TNTDB_CONNECTIONPOOL_H
#define TNTDB_CONNECTIONPOOL_H
#include <cxxtools/noncopyable.h>
#include <cxxtools/pool.h>
#include <map>
#include <string>
namespace tntdb
{
class Connection;
class ConnectionPool
{
class Connector
{
std::string url;
public:
Connector(const std::string& url_)
: url(url_)
{ }
Connection* operator() ();
};
typedef cxxtools::Pool<Connection, Connector> PoolType;
PoolType pool;
public:
typedef PoolType::Ptr PoolObjectType;
public:
explicit ConnectionPool(const std::string& url, unsigned maxcount = 0)
: pool(maxcount, Connector(url))
{ }
Connection connect();
/**
* Releases unused connections. Keeps the given number of
* connections.
*/
void drop(unsigned keep = 0) { pool.drop(keep); }
unsigned getMaximumSize() { return pool.getMaximumSize(); }
void setMaximumSize(unsigned m) { pool.setMaximumSize(m); }
unsigned getCurrentSize() const { return pool.getCurrentSize(); }
};
class ConnectionPools : private cxxtools::NonCopyable
{
public:
typedef ConnectionPool PoolType;
typedef std::map<std::string, PoolType*> PoolsType;
private:
PoolsType pools;
unsigned maxcount;
mutable cxxtools::Mutex mutex;
public:
explicit ConnectionPools(unsigned maxcount_ = 0)
: maxcount(maxcount_)
{ }
~ConnectionPools();
Connection connect(const std::string& url);
/**
* Releases unused connections. Keeps the given number of
* connections.
*/
void drop(unsigned keep = 0);
/**
* Releases unused connections, which match the given url. Keeps
* the given number of connections.
*/
void drop(const std::string& url, unsigned keep = 0);
unsigned getMaximumSize() { return maxcount; }
void setMaximumSize(unsigned m);
unsigned getCurrentSize(const std::string& url) const;
};
}
#endif // TNTDB_CONNECTIONPOOL_H
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