include/private/configurationreader.hpp

   1 /*
   2    Copyright (c) 2018-2019 Nokia.
   3
   4    Licensed under the Apache License, Version 2.0 (the "License");
   5    you may not use this file except in compliance with the License.
   6    You may obtain a copy of the License at
   7
   8        http://www.apache.org/licenses/LICENSE-2.0
   9
  10    Unless required by applicable law or agreed to in writing, software
  11    distributed under the License is distributed on an "AS IS" BASIS,
  12    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13    See the License for the specific language governing permissions and
  14    limitations under the License.
  15 */
  16
  17 #ifndef SHAREDDATALAYER_CONFIGURATIONREADER_HPP_
  18 #define SHAREDDATALAYER_CONFIGURATIONREADER_HPP_
  19
  20 #define DB_HOST_ENV_VAR_NAME "DBAAS_SERVICE_HOST"
  21 #define DB_PORT_ENV_VAR_NAME "DBAAS_SERVICE_PORT"
  22
  23 #include <iosfwd>
  24 #include <string>
  25 #include <unordered_map>
  26 #include <boost/property_tree/ptree.hpp>
  27 #include <sdl/exception.hpp>
  28 #include "private/configurationpaths.hpp"
  29 #include "private/logger.hpp"
  30
  31 namespace shareddatalayer
  32 {
  33     class DatabaseConfiguration;
  34     class NamespaceConfigurations;
  35     class System;
  36
  37     class ConfigurationReader
  38     {
  39     public:
  40         explicit ConfigurationReader(std::shared_ptr<Logger> logger);
  41
  42         ConfigurationReader(const Directories& directories,
  43                             System& system,
  44                             std::shared_ptr<Logger> logger);
  45
  46         ~ConfigurationReader();
  47
  48         void readDatabaseConfiguration(DatabaseConfiguration& databaseConfiguration);
  49
  50         void readNamespaceConfigurations(NamespaceConfigurations& namespaceConfigurations);
  51
  52         /**
  53          * Overrides existing json configuration with json format input stream given as
  54          * parameter. Does not override existing configration if existing configration
  55          * originates from environment variable. Meant for UT usage.
  56          */
  57         void readConfigurationFromInputStream(const std::istream& input);
  58
  59     private:
  60         const std::string dbHostEnvVariableName;
  61         std::string dbHostEnvVariableValue;
  62         const std::string dbPortEnvVariableName;
  63         std::string dbPortEnvVariableValue;
  64         boost::optional<boost::property_tree::ptree> jsonDatabaseConfiguration;
  65         std::string sourceForDatabaseConfiguration;
  66         std::unordered_map<std::string, std::pair<boost::property_tree::ptree, std::string>> jsonNamespaceConfigurations;
  67         std::shared_ptr<Logger> logger;
  68
  69         void readConfigurationFromDirectories(const Directories& directories);
  70
  71         template<typename T>
  72         void readConfiguration(T& input, const std::string& sourceName);
  73     };
  74 }
  75
  76 #endif