src/DeviceConfig.cc

   1 /*
   2  * DeviceConfig.cc
   3  *
   4  *  Created on: Dec 9, 2010
   5  *      Author: lamikr
   6  */
   7
   8 #include "DeviceConfig.hh"
   9
  10 #include <string.h>
  11 #include <malloc.h>
  12
  13 #include "DataReader.hh"
  14 #include "FileUtil.hh"
  15
  16 #include "log.h"
  17 #include "config.h"
  18 #include "private/uci_config.h"
  19 #include "retval.h"
  20
  21 using namespace std;
  22 using namespace plp;
  23
  24 string DeviceConfig::store_base_dir             = DEFAULT_STORAGE_BASE_DIR;
  25 long DeviceConfig::read_interval_seconds        = 600;
  26
  27 ConfigHandle::ConfigHandle(uci_context *ctx_param,
  28                         uci_package *pkg_param,
  29                         const char *short_fname_param,
  30                         const char *full_fname_param) {
  31         _ctx            = ctx_param;
  32         _pkg            = pkg_param;
  33         short_fname     = strdup(short_fname_param);
  34         full_fname      = strdup(full_fname_param);
  35 }
  36
  37 ConfigHandle::~ConfigHandle() {
  38         uci_unload(_ctx, _pkg);
  39         uci_free_context(_ctx);
  40         free(short_fname);
  41         free(full_fname);
  42 }
  43
  44 DeviceConfig::DeviceConfig(string device_id_param) {
  45         bool    succ;
  46
  47         device_id       = device_id_param;
  48         uci_handle      = load_device_config(device_id_param);
  49         if (uci_handle != NULL) {
  50                 succ    = get_config_value(DEVICE_CONFIG_VALUE_KEY__TYPE, device_type);
  51                 if (succ == false) {
  52                         log_error("Could not read device type from the configuration file.\n");
  53                 }
  54         }
  55         else {
  56                 log_error("Could not read device configuration.\n");
  57         }
  58 }
  59
  60 DeviceConfig::~DeviceConfig() {
  61         bool    suc;
  62
  63         if (uci_handle != NULL) {
  64                 suc     = uci_save_config_values(uci_handle->_ctx,
  65                                         uci_handle->_pkg);
  66                 if (suc == true) {
  67                         log_debug("saved the configuration file: %s\n", uci_handle->full_fname);
  68                 }
  69                 delete(uci_handle);
  70                 uci_handle      = NULL;
  71         }
  72 }
  73
  74 void DeviceConfig::set_base_dir_name(string store_param) {
  75         int     pos;
  76         int     b_count;
  77
  78         pos     = store_param.find_last_of("/");
  79         b_count = store_param.length();
  80         if (pos == (b_count - 1)) {
  81                 store_base_dir  = store_param;
  82         }
  83         else {
  84                 store_base_dir  = store_param + "/";
  85         }
  86 }
  87
  88 long DeviceConfig::get_read_interval_seconds() {
  89         return read_interval_seconds;
  90 }
  91
  92 void DeviceConfig::set_read_interval_seconds(long seconds_param) {
  93         read_interval_seconds   = seconds_param;
  94 }
  95
  96 string DeviceConfig::get_base_dir_name() {
  97         return store_base_dir;
  98 }
  99
 100 string DeviceConfig::get_config_path_name() {
 101         string  ret_val;
 102         string  path_name;
 103
 104         path_name       = DeviceConfig::get_base_dir_name();
 105         ret_val         = FileUtil::concat_paths(path_name, device_id);
 106         return ret_val;
 107 }
 108
 109 string DeviceConfig::get_config_file_name() {
 110         string  ret_val;
 111         string  fname_base;
 112
 113         fname_base      = DEVICE_CONFIG__FILE_NAME;
 114         ret_val         = get_config_path_name();
 115         ret_val         = FileUtil::concat_paths(ret_val, fname_base);
 116         return ret_val;
 117 }
 118
 119 string DeviceConfig::get_pathless_config_file_name() {
 120         return DEVICE_CONFIG__FILE_NAME;
 121 }
 122
 123 bool DeviceConfig::get_config_value(string key, string& value) {
 124         char    *ret;
 125         bool    ret_val;
 126         int     err_flg;
 127
 128         ret_val = false;
 129         value.clear();
 130         if ((uci_handle != NULL) &&
 131             (uci_handle->_ctx != NULL) &&
 132             (uci_handle->_pkg != NULL)) {
 133                 if (key.empty() == false) {
 134                         ret     = uci_get_config_value(uci_handle->_ctx,
 135                                                 uci_handle->_pkg,
 136                                                 DEVICE_CONFIG__SECTION_NAME,
 137                                                 key.c_str(),
 138                                                 &err_flg);
 139                         if ((err_flg == PLP_OK) &&
 140                             (ret != NULL)) {
 141                                 ret_val = true;
 142                                 value   = ret;
 143                         }
 144                 }
 145                 else {
 146                         log_error("Failed to read configuration value, key was empty string.\n");
 147                 }
 148         }
 149         else {
 150                 log_error("Failed to read configuration value for key: %s. Invalid handle to configuration file.\n", key.c_str());
 151         }
 152         return ret_val;
 153 }
 154
 155 bool DeviceConfig::set_config_value(string key,
 156                                 string value,
 157                                 bool save_immediately) {
 158         string  cfg_dir;
 159         string  cfg_fl;
 160         bool    ret_val;
 161
 162         cfg_dir = get_config_path_name();
 163         cfg_fl  = DEVICE_CONFIG__FILE_NAME;
 164         if (uci_handle != NULL) {
 165                 if ((uci_handle->_ctx != NULL) &&
 166                     (uci_handle->_pkg != NULL) &&
 167                     (uci_handle->short_fname != NULL) &&
 168                     (uci_handle->full_fname != NULL)) {
 169                         //log_debug("uci_handle != null, short_name: %s, full_name: %s\n",
 170                         //      uci_handle->short_fname, uci_handle->full_fname);
 171                         //log_debug("key: %s, value: %s\n", key.c_str(), value.c_str());
 172                         ret_val = uci_set_config_value(uci_handle->_ctx,
 173                                                 uci_handle->_pkg,
 174                                                 uci_handle->short_fname,
 175                                                 uci_handle->full_fname,
 176                                                 DEVICE_CONFIG__SECTION_TYPE,
 177                                                 DEVICE_CONFIG__SECTION_NAME,
 178                                                 key.c_str(),
 179                                                 value.c_str(),
 180                                                 save_immediately);
 181                 }
 182                 else {
 183                         log_error("Could not set config value for device %s: key: %s, value: %s. Invalid filename in handle.\n",
 184                                 device_id.c_str(), key.c_str(), value.c_str());
 185                 }
 186         }
 187         else {
 188                 log_error("Could not set config value for device %s: key: %s, value: %s. Invalid handle to config file\n",
 189                         device_id.c_str(), key.c_str(), value.c_str());
 190         }
 191         return ret_val;
 192 }
 193
 194 // TODO: This function should be moved else where or it should be dynamic...
 195 EnumSummaryCalculationType DeviceConfig::get_summary_calculation_type() {
 196         if (device_type.empty() == false) {
 197                 if (device_type.compare("Counter Device") == 0) {
 198                         return DELTA;
 199                 }
 200         }
 201         return MEAN;
 202 }
 203
 204 ConfigHandle *DeviceConfig::load_device_config(string device_id_param) {
 205         int                     err_flg;
 206         struct uci_context      *ctx;
 207         struct uci_package      *pkg;
 208         string                  fname_base;
 209         string                  fname_full;
 210         string                  cfg_dir;
 211         ConfigHandle            *ret_val;
 212         FILE                    *fp;
 213
 214         ret_val = NULL;
 215         cfg_dir = get_config_path_name();
 216         if (cfg_dir.empty() == false) {
 217                 fname_full      = get_config_file_name();
 218                 if (FileUtil::file_exist(fname_full.c_str(), false) == false)
 219                         FileUtil::mkfile(fname_full.c_str(), false);
 220                 if (access(fname_full.c_str(), R_OK) == 0) {
 221                         ctx     = uci_alloc_context();
 222                         if (ctx != NULL) {
 223                                 //log_debug("configuration file: %s\n", fname_full.c_str());
 224                                 uci_set_confdir(ctx, cfg_dir.c_str());
 225                                 err_flg = uci_load(ctx, fname_full.c_str(), &pkg);
 226                                 if (err_flg == UCI_OK) {
 227                                         //log_debug("Loaded device configuration: %s.\n", cfg_fl.c_str());
 228                                         fname_base      = get_pathless_config_file_name();
 229                                         ret_val = new ConfigHandle(ctx,
 230                                                                 pkg,
 231                                                                 fname_base.c_str(),
 232                                                                 fname_full.c_str());
 233                                 }
 234                                 else {
 235                                         log_debug("Failed to load device configuration: %s, err code: %d.\n", fname_full.c_str(), UCI_OK);
 236                                         fp      = fopen(fname_full.c_str(), "w+");
 237                                         if (fp != NULL)
 238                                                 fclose(fp);
 239                                         //uci_free_context(ctx);
 240                                 }
 241                         }
 242                         else {
 243                                 log_error("Failed to load device configuration, memory allocation error.\n");
 244                                 fp      = fopen(fname_full.c_str(), "w+");
 245                                 if (fp != NULL)
 246                                         fclose(fp);
 247                         }
 248                 }
 249                 else {
 250                         log_error("Failed to load device configuration, file does not exist: %s.\n", fname_full.c_str());
 251                 }
 252         }
 253         return ret_val;
 254 }
 255
 256 DeviceConfig *DeviceConfig::get_device_config(string device_id_param) {
 257         DeviceConfig    *ret_val;
 258
 259         ret_val = new DeviceConfig(device_id_param);
 260         return ret_val;
 261 }