SIOVPmtGainProvider.h

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#ifndef SIOVPMTGAINPROVIDER_H
#define SIOVPMTGAINPROVIDER_H

#include "larevt/CalibrationDBI/IOVData/PmtGain.h"
#include "larevt/CalibrationDBI/IOVData/Snapshot.h"
#include "larevt/CalibrationDBI/IOVData/IOVDataConstants.h"
#include "larevt/CalibrationDBI/Interface/PmtGainProvider.h"
#include "DatabaseRetrievalAlg.h"

namespace lariov {

  class SIOVPmtGainProvider : public DatabaseRetrievalAlg, public PmtGainProvider {
  
    public:
    
      SIOVPmtGainProvider(fhicl::ParameterSet const& p);
      
      void Reconfigure(fhicl::ParameterSet const& p) override;
      
      void UpdateTimeStamp(DBTimeStamp_t ts);

      bool Update(DBTimeStamp_t ts);
      
      const PmtGain& PmtGainObject(DBChannelID_t ch) const;      
      float Gain(DBChannelID_t ch) const override;
      float GainErr(DBChannelID_t ch) const override;
      CalibrationExtraInfo const& ExtraInfo(DBChannelID_t ch) const override;
      
    private:
    

      bool DBUpdate() const;                    // Uses current event time.
      bool DBUpdate(DBTimeStamp_t ts) const;

      // Time stamps.

      DBTimeStamp_t fEventTimeStamp;            // Most recently seen time stamp.
      mutable DBTimeStamp_t fCurrentTimeStamp;  // Time stamp of cached data.

      DataSource::ds fDataSource;
          
      mutable Snapshot<PmtGain> fData;
  };
}//end namespace lariov

#endif