pooledsessionimpl.cpp

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。

//
// PooledSessionImpl.cpp
//
// $Id: //poco/1.3/Data/src/PooledSessionImpl.cpp#2 $
//
// Library: Data
// Package: SessionPooling
// Module:  PooledSessionImpl
//
// 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/PooledSessionImpl.h"
#include "Poco/Data/DataException.h"
#include "Poco/Data/SessionPool.h"


namespace Poco {
namespace Data {


PooledSessionImpl::PooledSessionImpl(PooledSessionHolder* pHolder):
	_pHolder(pHolder, true)
{
}


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


StatementImpl* PooledSessionImpl::createStatementImpl()
{
	return access()->createStatementImpl();
}


void PooledSessionImpl::begin()
{
	return access()->begin();
}


void PooledSessionImpl::commit()
{
	return access()->commit();
}


bool PooledSessionImpl::isConnected()
{
	return access()->isConnected();
}


bool PooledSessionImpl::isTransaction()
{
	return access()->isTransaction();
}


void PooledSessionImpl::rollback()
{
	return access()->rollback();
}


void PooledSessionImpl::close()
{
	if (_pHolder)
	{
		if (isTransaction())
		{
			try
			{
				rollback();
			}
			catch (...)
			{
				// Something's wrong with the session. Get rid of it.
				access()->close();
			}
		}
		_pHolder->owner().putBack(_pHolder);
		_pHolder = 0;
	}
}


void PooledSessionImpl::setFeature(const std::string& name, bool state)	
{
	access()->setFeature(name, state);
}


bool PooledSessionImpl::getFeature(const std::string& name)
{
	return access()->getFeature(name);
}


void PooledSessionImpl::setProperty(const std::string& name, const Poco::Any& value)
{
	access()->setProperty(name, value);
}


Poco::Any PooledSessionImpl::getProperty(const std::string& name)
{
	return access()->getProperty(name);
}


SessionImpl* PooledSessionImpl::access()
{
	if (_pHolder)
	{
		_pHolder->access();
		return impl();
	}
	else throw SessionUnavailableException();
}


} } // namespace Poco::Data