src/libhydra/plugins/attr_sql/attr_sql_plugin.c

   1 /*
   2  * Copyright (C) 2008 Martin Willi
   3  * Hochschule fuer Technik Rapperswil
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #include <hydra.h>
  17 #include <debug.h>
  18
  19 #include "attr_sql_plugin.h"
  20 #include "sql_attribute.h"
  21
  22 typedef struct private_attr_sql_plugin_t private_attr_sql_plugin_t;
  23
  24 /**
  25  * private data of attr_sql plugin
  26  */
  27 struct private_attr_sql_plugin_t {
  28
  29         /**
  30          * implements plugin interface
  31          */
  32         attr_sql_plugin_t public;
  33
  34         /**
  35          * database connection instance
  36          */
  37         database_t *db;
  38
  39         /**
  40          * configuration attributes
  41          */
  42         sql_attribute_t *attribute;
  43
  44 };
  45
  46 /**
  47  * Implementation of plugin_t.destroy
  48  */
  49 static void destroy(private_attr_sql_plugin_t *this)
  50 {
  51         hydra->attributes->remove_provider(hydra->attributes, &this->attribute->provider);
  52         this->attribute->destroy(this->attribute);
  53         this->db->destroy(this->db);
  54         free(this);
  55 }
  56
  57 /*
  58  * see header file
  59  */
  60 plugin_t *attr_sql_plugin_create()
  61 {
  62         char *uri;
  63         private_attr_sql_plugin_t *this;
  64
  65         uri = lib->settings->get_str(lib->settings, "libhydra.plugins.attr-sql.database", NULL);
  66         if (!uri)
  67         {
  68                 DBG1(DBG_CFG, "attr-sql plugin: database URI not set");
  69                 return NULL;
  70         }
  71
  72         this = malloc_thing(private_attr_sql_plugin_t);
  73
  74         this->public.plugin.destroy = (void(*)(plugin_t*))destroy;
  75
  76         this->db = lib->db->create(lib->db, uri);
  77         if (!this->db)
  78         {
  79                 DBG1(DBG_CFG, "attr-sql plugin failed to connect to database");
  80                 free(this);
  81                 return NULL;
  82         }
  83         this->attribute = sql_attribute_create(this->db);
  84         hydra->attributes->add_provider(hydra->attributes, &this->attribute->provider);
  85
  86         return &this->public.plugin;
  87 }
  88