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SessionImpl.cpp
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254 lines (198 loc) · 5.09 KB
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//
// SessionImpl.cpp
//
// Library: Data/SQLite
// Package: SQLite
// Module: SessionImpl
//
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#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/Stopwatch.h"
#include "Poco/String.h"
#include "Poco/Mutex.h"
#include "Poco/Data/DataException.h"
#if defined(POCO_UNBUNDLED)
#include <sqlite3.h>
#else
#include "sqlite3.h"
#endif
#include <cstdlib>
#ifndef SQLITE_OPEN_URI
#define SQLITE_OPEN_URI 0
#endif
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(loginTimeout);
setProperty("handle", _pDB);
addFeature("autoCommit",
&SessionImpl::autoCommit,
&SessionImpl::isAutoCommit);
addProperty("connectionTimeout", &SessionImpl::setConnectionTimeout, &SessionImpl::getConnectionTimeout);
}
SessionImpl::~SessionImpl()
{
try
{
close();
}
catch (...)
{
poco_unexpected();
}
}
Poco::Data::StatementImpl::Ptr 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() const
{
return Session::TRANSACTION_READ_COMMITTED;
}
bool SessionImpl::hasTransactionIsolation(Poco::UInt32 ti) const
{
if (ti == Session::TRANSACTION_READ_COMMITTED) return true;
return false;
}
bool SessionImpl::isTransactionIsolation(Poco::UInt32 ti) const
{
if (ti == Session::TRANSACTION_READ_COMMITTED) return true;
return false;
}
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
{
int rc = 0;
size_t tout = getLoginTimeout();
Stopwatch sw; sw.start();
while (true)
{
rc = sqlite3_open_v2(connectionString().c_str(), &_pDB,
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_URI, NULL);
if (rc == SQLITE_OK) break;
if (sw.elapsedSeconds() >= tout)
{
Utility::throwException(_pDB, rc);
}
Thread::sleep(10);
close();
}
}
catch (SQLiteException& ex)
{
close();
throw ConnectionFailedException(ex.displayText());
}
_connected = true;
}
void SessionImpl::close()
{
if (_pDB)
{
sqlite3_close_v2(_pDB);
_pDB = 0;
}
_connected = false;
}
void SessionImpl::reset()
{
}
bool SessionImpl::isConnected() const
{
return _connected;
}
void SessionImpl::setConnectionTimeout(std::size_t timeout)
{
int tout = static_cast<int>(1000 * timeout);
int rc = sqlite3_busy_timeout(_pDB, tout);
if (rc != 0) Utility::throwException(_pDB, rc);
_timeout = tout;
}
void SessionImpl::setConnectionTimeout(const std::string& prop, const Poco::Any& value)
{
setConnectionTimeout(Poco::RefAnyCast<std::size_t>(value));
}
Poco::Any SessionImpl::getConnectionTimeout(const std::string& prop) const
{
return Poco::Any(_timeout/1000);
}
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&) const
{
Poco::Mutex::ScopedLock l(_mutex);
return (0 != sqlite3_get_autocommit(_pDB));
}
// NOTE: Utility::dbHandle() has been moved here from Utility.cpp
// as a workaround for a failing AnyCast with Clang.
// See <https://github.com/pocoproject/poco/issues/578>
// for a discussion.
sqlite3* Utility::dbHandle(const Session& session)
{
return AnyCast<sqlite3*>(session.getProperty("handle"));
}
} } } // namespace Poco::Data::SQLite