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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 */