RCDBReader.h

#pragma once
 
#include "Object.h"
#include <mutex>
 
#ifdef USE_RCDB
// workaround ODR violations from header-only RCDB:
// - forward declare RCDB classes here
// - include directives go in the .cc file
namespace rcdb {
  class Connection;
}
#endif
 
namespace iguana {

  class RCDBReader : public Object
  {
 
    public:

      RCDBReader(std::string_view name = "rcdb", Logger::Level lev = Logger::DEFAULT_LEVEL);

      ~RCDBReader();

      double GetBeamEnergy(int const runnum);

      void SetBeamEnergyOverride(double const beam_energy);
 
    protected:

      std::string const m_default_url = "mysql://rcdb@clasdb.jlab.org/rcdb";
 
    private:
 
      std::string m_url;
      std::once_flag m_error_once;

      double m_beam_energy_override{-1};
 
#ifdef USE_RCDB
      std::unique_ptr<rcdb::Connection> m_rcdb_connection;
#endif
  };
}