sessionimpl.cpp.svn-base

很好用的网络封装库,不熟悉网络编程的人也可以使用。使用风格良好的标准c++编写。

//
// SessionImpl.cpp
//
// $Id: //poco/1.3/Data/SQLite/src/SessionImpl.cpp#3 $
//
// Library: SQLite
// Package: SQLite
// Module:  SessionImpl
//
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/Data/SQLite/SessionImpl.h"
#include "Poco/Data/SQLite/Utility.h"
#include "Poco/Data/SQLite/SQLiteStatementImpl.h"
#include "sqlite3.h"
#include <cstdlib>


namespace Poco {
namespace Data {
namespace SQLite {


const std::string SessionImpl::DEFERRED_BEGIN_TRANSACTION("BEGIN DEFERRED");
const std::string SessionImpl::COMMIT_TRANSACTION("COMMIT");
const std::string SessionImpl::ABORT_TRANSACTION("ROLLBACK");


SessionImpl::SessionImpl(const std::string& fileName):
	_dbFileName(fileName),
	_pDB(0),
	_connected(false),
	_isTransaction(false)
{
	open();
}


SessionImpl::~SessionImpl()
{
	close();
}


Poco::Data::StatementImpl* SessionImpl::createStatementImpl()
{
	poco_check_ptr (_pDB);
	return new SQLiteStatementImpl(_pDB);
}


void SessionImpl::begin()
{
	SQLiteStatementImpl tmp(_pDB);
	tmp.add(DEFERRED_BEGIN_TRANSACTION);
	tmp.execute();
	_isTransaction = true;
}


void SessionImpl::commit()
{
	SQLiteStatementImpl tmp(_pDB);
	tmp.add(COMMIT_TRANSACTION);
	tmp.execute();
	_isTransaction = false;
}


void SessionImpl::rollback()
{
	SQLiteStatementImpl tmp(_pDB);
	tmp.add(ABORT_TRANSACTION);
	tmp.execute();
	_isTransaction = false;
}


void SessionImpl::open()
{
	int rc = sqlite3_open(_dbFileName.c_str(), &_pDB);

	if (rc != 0)
	{
		close();
		Utility::throwException(rc);
	}

	_connected = true;
}


void SessionImpl::close()
{
	if (_pDB)
	{
		sqlite3_close(_pDB);
		_pDB = 0;
	}

	_connected = false;
}


bool SessionImpl::isConnected()
{
	return _connected;
}


} } } // namespace Poco::Data::SQLite