Line data    Source code

       1              : /*
       2              :    This file is part of TALER
       3              :    Copyright (C) 2022 Taler Systems SA
       4              : 
       5              :    TALER is free software; you can redistribute it and/or modify it under the
       6              :    terms of the GNU General Public License as published by the Free Software
       7              :    Foundation; either version 3, or (at your option) any later version.
       8              : 
       9              :    TALER is distributed in the hope that it will be useful, but WITHOUT ANY
      10              :    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
      11              :    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
      12              : 
      13              :    You should have received a copy of the GNU General Public License along with
      14              :    TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
      15              :  */
      16              : /**
      17              :  * @file exchangedb/preflight.c
      18              :  * @brief Implementation of the preflight function for Postgres
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "exchange-database/preflight.h"
      23              : #include "helper.h"
      24              : 
      25              : 
      26              : enum GNUNET_GenericReturnValue
      27         6245 : TALER_EXCHANGEDB_preflight (struct TALER_EXCHANGEDB_PostgresContext *pg)
      28              : {
      29         6245 :   struct GNUNET_PQ_ExecuteStatement es[] = {
      30         6245 :     GNUNET_PQ_make_execute ("ROLLBACK"),
      31              :     GNUNET_PQ_EXECUTE_STATEMENT_END
      32              :   };
      33              : 
      34         6245 :   if (NULL == pg->transaction_name)
      35              :   {
      36         6239 :     GNUNET_PQ_reconnect_if_down (pg->conn);
      37         6239 :     return GNUNET_OK; /* all good */
      38              :   }
      39            6 :   if (GNUNET_OK ==
      40            6 :       GNUNET_PQ_exec_statements (pg->conn,
      41              :                                  es))
      42              :   {
      43            6 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
      44              :                 "BUG: Preflight check rolled back transaction `%s'!\n",
      45              :                 pg->transaction_name);
      46              :   }
      47              :   else
      48              :   {
      49            0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
      50              :                 "BUG: Preflight check failed to rollback transaction `%s'!\n",
      51              :                 pg->transaction_name);
      52            0 :     pg->transaction_name = NULL;
      53              :     /* FIXME: modify GNUNET_PQ_reconnect_if_down () to tell
      54              :        us if it did reconnect; if it did, GNUNET_NO is fine,
      55              :        otherwise we probably want to return GNUNET_SYSERR here... */
      56            0 :     GNUNET_PQ_reconnect_if_down (pg->conn);
      57            0 :     return GNUNET_NO;
      58              :   }
      59            6 :   pg->transaction_name = NULL;
      60            6 :   return GNUNET_NO;
      61              : }