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/* This file is part of the KDE project
Copyright (C) 2003 Jaroslaw Staniek <[email protected]>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This program 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this program; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <kexidb/transaction.h>
#include <kexidb/connection.h>
#include <kdebug.h>
#include <assert.h>
//remove debug
#undef KexiDBDbg
#define KexiDBDbg if (0) kdDebug()
using namespace KexiDB;
//helper for debugging
KEXI_DB_EXPORT int Transaction::globalcount = 0;
KEXI_DB_EXPORT int Transaction::globalCount() { return Transaction::globalcount; }
KEXI_DB_EXPORT int TransactionData::globalcount = 0;
KEXI_DB_EXPORT int TransactionData::globalCount() { return TransactionData::globalcount; }
TransactionData::TransactionData(Connection *conn)
: m_conn(conn)
, m_active(true)
, refcount(1)
{
assert(conn);
Transaction::globalcount++; //because refcount(1) init.
TransactionData::globalcount++;
KexiDBDbg << "-- TransactionData::globalcount == " << TransactionData::globalcount << endl;
}
TransactionData::~TransactionData()
{
TransactionData::globalcount--;
KexiDBDbg << "-- TransactionData::globalcount == " << TransactionData::globalcount << endl;
}
//---------------------------------------------------
const Transaction Transaction::null;
Transaction::Transaction()
: QObject(0,"kexidb_transaction")
, m_data(0)
{
}
Transaction::Transaction( const Transaction& trans )
: QObject(0,"kexidb_transaction")
, m_data(trans.m_data)
{
if (m_data) {
m_data->refcount++;
Transaction::globalcount++;
}
}
Transaction::~Transaction()
{
if (m_data) {
m_data->refcount--;
Transaction::globalcount--;
KexiDBDbg << "~Transaction(): m_data->refcount==" << m_data->refcount << endl;
if (m_data->refcount==0)
delete m_data;
}
else {
KexiDBDbg << "~Transaction(): null" << endl;
}
KexiDBDbg << "-- Transaction::globalcount == " << Transaction::globalcount << endl;
}
Transaction& Transaction::operator=(const Transaction& trans)
{
if (m_data) {
m_data->refcount--;
Transaction::globalcount--;
KexiDBDbg << "Transaction::operator=: m_data->refcount==" << m_data->refcount << endl;
if (m_data->refcount==0)
delete m_data;
}
m_data = trans.m_data;
if (m_data) {
m_data->refcount++;
Transaction::globalcount++;
}
return *this;
}
bool Transaction::operator==(const Transaction& trans) const
{
return m_data==trans.m_data;
}
Connection* Transaction::connection() const
{
return m_data ? m_data->m_conn : 0;
}
bool Transaction::active() const
{
return m_data && m_data->m_active;
}
bool Transaction::isNull() const
{
return m_data==0;
}
//---------------------------------------------------
TransactionGuard::TransactionGuard( Connection& conn )
: m_trans( conn.beginTransaction() )
, m_doNothing(false)
{
}
TransactionGuard::TransactionGuard( const Transaction& trans )
: m_trans(trans)
, m_doNothing(false)
{
}
TransactionGuard::TransactionGuard()
: m_doNothing(false)
{
}
TransactionGuard::~TransactionGuard()
{
if (!m_doNothing && m_trans.active() && m_trans.connection())
m_trans.connection()->rollbackTransaction(m_trans);
}
bool TransactionGuard::commit()
{
if (m_trans.active() && m_trans.connection()) {
return m_trans.connection()->commitTransaction(m_trans);
}
return false;
}
void TransactionGuard::doNothing()
{
m_doNothing = true;
}
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