MongoDBDictionarySource::MongoDBDictionarySource( const DictionaryStructure & dict_struct, const Poco::Util::AbstractConfiguration & config, const std::string & config_prefix, Block & sample_block) : MongoDBDictionarySource( dict_struct, config.getString(config_prefix + ".host"), config.getUInt(config_prefix + ".port"), config.getString(config_prefix + ".user", ""), config.getString(config_prefix + ".password", ""), config.getString(config_prefix + ".db", ""), config.getString(config_prefix + ".collection"), sample_block) { }