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SessionImpl.cpp
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252 lines (200 loc) · 5.88 KB
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//
// SessionImpl.cpp
//
// $Id: //poco/Main/Data/SQLite/src/SessionImpl.cpp#5 $
//
// 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 "Poco/Data/SQLite/SQLiteException.h"
#include "Poco/Data/Session.h"
#include "Poco/ActiveMethod.h"
#include "Poco/ActiveResult.h"
#include "Poco/String.h"
#include "Poco/Mutex.h"
#include "Poco/Data/DataException.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, std::size_t loginTimeout):
Poco::Data::AbstractSessionImpl<SessionImpl>(fileName, loginTimeout),
_connector(Connector::KEY),
_pDB(0),
_connected(false),
_isTransaction(false)
{
open();
setConnectionTimeout(CONNECTION_TIMEOUT_DEFAULT);
setProperty("handle", _pDB);
addFeature("autoCommit",
&SessionImpl::autoCommit,
&SessionImpl::isAutoCommit);
}
SessionImpl::~SessionImpl()
{
close();
}
Poco::Data::StatementImpl* SessionImpl::createStatementImpl()
{
poco_check_ptr (_pDB);
return new SQLiteStatementImpl(*this, _pDB);
}
void SessionImpl::begin()
{
Poco::Mutex::ScopedLock l(_mutex);
SQLiteStatementImpl tmp(*this, _pDB);
tmp.add(DEFERRED_BEGIN_TRANSACTION);
tmp.execute();
_isTransaction = true;
}
void SessionImpl::commit()
{
Poco::Mutex::ScopedLock l(_mutex);
SQLiteStatementImpl tmp(*this, _pDB);
tmp.add(COMMIT_TRANSACTION);
tmp.execute();
_isTransaction = false;
}
void SessionImpl::rollback()
{
Poco::Mutex::ScopedLock l(_mutex);
SQLiteStatementImpl tmp(*this, _pDB);
tmp.add(ABORT_TRANSACTION);
tmp.execute();
_isTransaction = false;
}
void SessionImpl::setTransactionIsolation(Poco::UInt32 ti)
{
if (ti != Session::TRANSACTION_READ_COMMITTED)
throw Poco::InvalidArgumentException("setTransactionIsolation()");
}
Poco::UInt32 SessionImpl::getTransactionIsolation()
{
return Session::TRANSACTION_READ_COMMITTED;
}
bool SessionImpl::hasTransactionIsolation(Poco::UInt32 ti)
{
if (ti == Session::TRANSACTION_READ_COMMITTED) return true;
return false;
}
bool SessionImpl::isTransactionIsolation(Poco::UInt32 ti)
{
if (ti == Session::TRANSACTION_READ_COMMITTED) return true;
return false;
}
class ActiveConnector
{
public:
ActiveConnector(const std::string& connectString, sqlite3** ppDB):
connect(this, &ActiveConnector::connectImpl),
_connectString(connectString),
_ppDB(ppDB)
{
poco_check_ptr(_ppDB);
}
ActiveMethod<int, void, ActiveConnector> connect;
private:
ActiveConnector();
inline int connectImpl()
{
return sqlite3_open(_connectString.c_str(), _ppDB);
}
std::string _connectString;
sqlite3** _ppDB;
};
void SessionImpl::open(const std::string& connect)
{
if (connect != connectionString())
{
if (isConnected())
throw InvalidAccessException("Session already connected");
if (!connect.empty())
setConnectionString(connect);
}
poco_assert_dbg (!connectionString().empty());
try
{
ActiveConnector connector(connectionString(), &_pDB);
ActiveResult<int> result = connector.connect();
if (!result.tryWait(getLoginTimeout() * 1000))
throw ConnectionFailedException("Timed out.");
int rc = result.data();
if (rc != 0)
{
close();
Utility::throwException(rc);
}
} catch (SQLiteException& ex)
{
throw ConnectionFailedException(ex.displayText());
}
_connected = true;
}
void SessionImpl::close()
{
if (_pDB)
{
sqlite3_close(_pDB);
_pDB = 0;
}
_connected = false;
}
bool SessionImpl::isConnected()
{
return _connected;
}
void SessionImpl::setConnectionTimeout(std::size_t timeout)
{
int tout = 1000 * timeout;
int rc = sqlite3_busy_timeout(_pDB, tout);
if (rc != 0) Utility::throwException(rc);
_timeout = tout;
}
void SessionImpl::autoCommit(const std::string&, bool)
{
// The problem here is to decide whether to call commit or rollback
// when autocommit is set to true. Hence, it is best not to implement
// this explicit call and only implicitly support autocommit setting.
throw NotImplementedException(
"SQLite autocommit is implicit with begin/commit/rollback.");
}
bool SessionImpl::isAutoCommit(const std::string&)
{
Poco::Mutex::ScopedLock l(_mutex);
return (0 != sqlite3_get_autocommit(_pDB));
}
} } } // namespace Poco::Data::SQLite