Line data    Source code

       1             : /*
       2             :   This file is part of TALER
       3             :   Copyright (C) 2015 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/exchangedb_plugin.c
      18             :  * @brief Logic to load database plugin
      19             :  * @author Christian Grothoff
      20             :  * @author Sree Harsha Totakura <sreeharsha@totakura.in>
      21             :  */
      22             : #include "platform.h"
      23             : #include "taler_exchangedb_lib.h"
      24             : #include <ltdl.h>
      25             : 
      26             : 
      27             : struct TALER_EXCHANGEDB_Plugin *
      28         895 : TALER_EXCHANGEDB_plugin_load (const struct GNUNET_CONFIGURATION_Handle *cfg,
      29             :                               bool skip_preflight)
      30             : {
      31             :   char *plugin_name;
      32             :   char *lib_name;
      33             :   struct TALER_EXCHANGEDB_Plugin *plugin;
      34             : 
      35         895 :   if (GNUNET_OK !=
      36         895 :       GNUNET_CONFIGURATION_get_value_string (cfg,
      37             :                                              "exchange",
      38             :                                              "db",
      39             :                                              &plugin_name))
      40             :   {
      41           0 :     GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
      42             :                                "exchange",
      43             :                                "db");
      44           0 :     return NULL;
      45             :   }
      46         895 :   GNUNET_asprintf (&lib_name,
      47             :                    "libtaler_plugin_exchangedb_%s",
      48             :                    plugin_name);
      49         895 :   GNUNET_free (plugin_name);
      50         895 :   plugin = GNUNET_PLUGIN_load (TALER_EXCHANGE_project_data (),
      51             :                                lib_name,
      52             :                                (void *) cfg);
      53         895 :   if (NULL == plugin)
      54             :   {
      55           0 :     GNUNET_free (lib_name);
      56           0 :     return NULL;
      57             :   }
      58         895 :   plugin->library_name = lib_name;
      59        1733 :   if ( (! skip_preflight) &&
      60             :        (GNUNET_OK !=
      61         838 :         plugin->preflight (plugin->cls)) )
      62             :   {
      63           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
      64             :                 "Database not ready. Try running taler-exchange-dbinit!\n");
      65           0 :     TALER_EXCHANGEDB_plugin_unload (plugin);
      66           0 :     return NULL;
      67             :   }
      68         895 :   return plugin;
      69             : }
      70             : 
      71             : 
      72             : void
      73         895 : TALER_EXCHANGEDB_plugin_unload (struct TALER_EXCHANGEDB_Plugin *plugin)
      74             : {
      75             :   char *lib_name;
      76             : 
      77         895 :   if (NULL == plugin)
      78           0 :     return;
      79         895 :   lib_name = plugin->library_name;
      80         895 :   GNUNET_assert (NULL == GNUNET_PLUGIN_unload (lib_name,
      81             :                                                plugin));
      82         895 :   GNUNET_free (lib_name);
      83             : }
      84             : 
      85             : 
      86             : /* end of exchangedb_plugin.c */