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pg_preflight.c (1875B)

      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 donaudb/pg_preflight.c
     18  * @brief Implementation of the preflight function for Postgres
     19  * @author Christian Grothoff
     20  */
     21 #include <donau_config.h>
     22 #include <taler/taler_error_codes.h>
     23 #include <taler/taler_dbevents.h>
     24 #include <taler/taler_pq_lib.h>
     25 #include "pg_preflight.h"
     26 #include "pg_helper.h"
     27 
     28 
     29 enum GNUNET_GenericReturnValue
     30 DH_PG_preflight (void *cls)
     31 {
     32   struct PostgresClosure *pg = cls;
     33   struct GNUNET_PQ_ExecuteStatement es[] = {
     34     GNUNET_PQ_make_execute ("ROLLBACK"),
     35     GNUNET_PQ_EXECUTE_STATEMENT_END
     36   };
     37 
     38   if (GNUNET_OK !=
     39       DH_PG_internal_setup (pg))
     40     return GNUNET_SYSERR;
     41   if (NULL == pg->transaction_name)
     42     return GNUNET_OK; /* all good */
     43   if (GNUNET_OK ==
     44       GNUNET_PQ_exec_statements (pg->conn,
     45                                  es))
     46   {
     47     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     48                 "BUG: Preflight check rolled back transaction `%s'!\n",
     49                 pg->transaction_name);
     50   }
     51   else
     52   {
     53     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     54                 "BUG: Preflight check failed to rollback transaction `%s'!\n",
     55                 pg->transaction_name);
     56   }
     57   pg->transaction_name = NULL;
     58   return GNUNET_NO;
     59 }