dataContext.hpp

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/**
 * @file
 * @ingroup server
 * @copyright ESO - European Southern Observatory
 * @author
 *
 * @brief DataContext class header file.
 */
#ifndef SERVER_DATA_CONTEXT_HPP_
#define SERVER_DATA_CONTEXT_HPP_
 
#include "config.hpp"
#include "dbInterface.hpp"
 
namespace server {
 
/**
 * This class provide access to the application run-time data including
 * the in-memory DB.
 */
class DataContext {
 public:
    /**
     * This constructor uses the application configuration to initialize the
     * adapter object to the in-memory DB.
     * The DB adapter is then used to initialize the DB interface object that
     * can be used to access the DB key-value pairs.
     *
     * @param[in] config Reference to the application configuration.
     */
 
    DataContext(Config& config, rad::DbAdapter& db_adapter);
 
    /**
     * Destructor
     */
    virtual ~DataContext();
 
    /**
     * Reload the configuration from file and reconnect to the in-memory DB.
     */
    void ReloadConfig();
 
    /**
     * Try to connect to the DB and update the application configuration.
     */
    void UpdateDb();
 
    /**
     * @return A reference to the DB interface object.
     */
    DbInterface& GetDbInterface();
 
    DataContext(const DataContext&) = delete;       //! Disable copy constructor
    DataContext& operator=(const DataContext&) = delete;  //! Disable assignment operator
 
 private:
    Config&            m_config;
    rad::DbAdapter&    m_runtime_db;
    DbInterface        m_db_interface;
};
 
}  // namespace server
 
#endif  // SERVER_DATA_CONTEXT_HPP_