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/*
This file is part of TALER
Copyright (C) 2022 Taler Systems SA
TALER 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 3, or (at your option) any later version.
TALER 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
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file exchangedb/pg_preflight.c
* @brief Implementation of the preflight function for Postgres
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_error_codes.h"
#include "taler_dbevents.h"
#include "taler_pq_lib.h"
#include "pg_preflight.h"
#include "pg_helper.h"
/**
* Connect to the database if the connection does not exist yet.
*
* @param pg the plugin-specific state
* @param skip_prepare true if we should skip prepared statement setup
* @return #GNUNET_OK on success
*/
enum GNUNET_GenericReturnValue
TEH_PG_internal_setup (struct PostgresClosure *pg,
bool skip_prepare);
enum GNUNET_GenericReturnValue
TEH_PG_preflight (void *cls)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_ExecuteStatement es[] = {
GNUNET_PQ_make_execute ("ROLLBACK"),
GNUNET_PQ_EXECUTE_STATEMENT_END
};
if (! pg->init)
{
if (GNUNET_OK !=
TEH_PG_internal_setup (pg,
false))
return GNUNET_SYSERR;
}
if (NULL == pg->transaction_name)
return GNUNET_OK; /* all good */
if (GNUNET_OK ==
GNUNET_PQ_exec_statements (pg->conn,
es))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"BUG: Preflight check rolled back transaction `%s'!\n",
pg->transaction_name);
}
else
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"BUG: Preflight check failed to rollback transaction `%s'!\n",
pg->transaction_name);
}
pg->transaction_name = NULL;
return GNUNET_NO;
}
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