ReadEb.h

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/****************************************
 * Read CMS energy from data base for
 * psi(3770) production
 *
 * 2012-1-05 created pingrg
 *
 ***************************************/
#ifndef DTagAlg_ReadBeamInfFromDb_H
#define DTagAlg_ReadBeamInfFromDb_H
 
#include "CLHEP/Vector/ThreeVector.h"
#include "DatabaseSvc/IDatabaseSvc.h"
#include <iostream>
#include <mysql.h>
 
class ReadEb {
 
public:
  ReadEb( int run )
      : m_run( -1 )
      , m_isRunValid( false )
      , m_beamE( 0 )
      , m_beta( 0.011, 0, 0 )
      , m_usecbE( true ) {
    if ( run != previousRun )
    {
      previousRun = run;
      ReadDb( run );
    }
  }
 
  virtual ~ReadEb() {}
 
  double                   getEcms() { return m_Ecms; }
  double                   getXangle() { return m_xangle; }
  inline CLHEP::Hep3Vector getbeta() { return m_beta; }
  inline void              setcalib( bool calib ) { m_usecbE = calib; }
 
private:
  MYSQL* OpenDb() const;
  void   ReadDb( int run );
  void   CloseDb( MYSQL* mysql ) const;
 
  IDatabaseSvc*     m_dbsvc;
  int               m_run;
  bool              m_isRunValid;
  double            m_beamE;
  static double     m_Ecms;
  static double     m_xangle;
  bool              m_usecbE;
  CLHEP::Hep3Vector m_beta;
  static int        previousRun;
};
 
#endif