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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2011 Brian Aker
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef DRIZZLED_SESSION_TRANSACTIONS_H
#define DRIZZLED_SESSION_TRANSACTIONS_H
#include <deque>
namespace drizzled
{
class Session;
namespace session
{
/**
* Structure used to manage "statement transactions" and
* "normal transactions". In autocommit mode, the normal transaction is
* equivalent to the statement transaction.
*
* Storage engines will be registered here when they participate in
* a transaction. No engine is registered more than once.
*/
class Transactions {
public:
Transactions() :
savepoints(),
all(),
stmt(),
xid_state()
{ }
std::deque<NamedSavepoint> savepoints;
/**
* The normal transaction (since BEGIN WORK).
*
* Contains a list of all engines that have participated in any of the
* statement transactions started within the context of the normal
* transaction.
*
* @note In autocommit mode, this is empty.
*/
TransactionContext all;
/**
* The statment transaction.
*
* Contains a list of all engines participating in the given statement.
*
* @note In autocommit mode, this will be used to commit/rollback the
* normal transaction.
*/
TransactionContext stmt;
XID_STATE xid_state;
void cleanup()
{
savepoints.clear();
}
};
} /* namespace session */
} /* namespace drizzled */
#endif /* DRIZZLED_SESSION_TRANSACTIONS_H */
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