/data/refman/pasoursint/CMSSW_5_3_4/src/CondCore/PopCon/interface/PopCon.h

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#ifndef POPCON_POPCON_H
#define POPCON_POPCON_H
//
// Author: Vincenzo Innocente
// Original Author:  Marcin BOGUSZ
// 


#include "CondCore/DBOutputService/interface/PoolDBOutputService.h"
#include "FWCore/ServiceRegistry/interface/Service.h"

#include "CondCore/DBCommon/interface/TagInfo.h"
#include "CondCore/DBCommon/interface/LogDBEntry.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include "FWCore/ParameterSet/interface/ParameterSetfwd.h"

#include "CondCore/DBCommon/interface/Time.h"

#include "CondCore/DBCommon/interface/IOVInfo.h"


#include <boost/bind.hpp>
#include <algorithm>
#include <vector>
#include <string>


#include<iostream>

namespace cond {
  class Summary;
}


namespace popcon {


  /* Populator of the Condition DB
   *
   */
  class PopCon {
  public:
    typedef cond::Time_t Time_t;
    typedef cond::Summary Summary;

    PopCon(const edm::ParameterSet& pset);
     
     virtual ~PopCon();

     template<typename Source>
       void write(Source const & source);

     template<typename T>
     void writeOne(T * payload, Time_t time);

   
    
     
  private:
     void initialize();
     void finalize(Time_t lastTill);


  private:

    edm::Service<cond::service::PoolDBOutputService> m_dbService;
    
    std::string  m_record;
    
    std::string m_payload_name;
    
    bool m_LoggingOn;
    
    bool m_IsDestDbCheckedInQueryLog;

    std::string m_tag;
    
    cond::TagInfo m_tagInfo;
    
    cond::LogDBEntry m_logDBEntry;

    bool m_close;
    Time_t m_lastTill;

    
  };


  template<typename T>
  void PopCon::writeOne(T * payload, Time_t time) {
    m_dbService->writeOne(payload, time, m_record, m_LoggingOn);
  }

  
  template<typename Container>
  void displayHelper(Container const & payloads) {
    typename Container::const_iterator it;
    for (it = payloads.begin(); it != payloads.end(); it++)
      edm::LogInfo ("PopCon")<< "Since " << (*it).time << std::endl;
  }     
  
  
  template<typename Container>
  const std::string displayIovHelper(Container const & payloads) {
    if (payloads.empty()) return "Nothing to transfer;";
    std::ostringstream s;    
    // when only 1 payload is transferred; 
    if ( payloads.size()==1)  
      s <<"Since " << (*payloads.begin()).time <<  "; " ;
    else{
      // when more than one payload are transferred;  
      s <<   "first payload Since " <<  (*payloads.begin()).time <<  ","
        << "last payload Since "  << (*payloads.rbegin()).time <<  ";" ;  
    }  
    return s.str();
  }
  
  
  
  
  
  template<typename Source>
  void PopCon::write(Source const & source) {
    typedef typename Source::value_type value_type;
    typedef typename Source::Container Container;
    
    initialize();
    std::pair<Container const *, std::string const> ret = source(m_dbService->session(),
                                                                 m_tagInfo,m_logDBEntry); 
    Container const & payloads = *ret.first;
    
    if(m_LoggingOn)
      m_dbService->setLogHeaderForRecord(m_record,source.id(),"PopCon v4.0; " + 
                                         cond::userInfo() + displayIovHelper(payloads) +  ret.second);
    
    displayHelper(payloads);
    
    std::for_each(payloads.begin(),payloads.end(),
                  boost::bind(&popcon::PopCon::writeOne<value_type>,this,
                              boost::bind(&Container::value_type::payload,_1),
                              boost::bind(&Container::value_type::time,_1)
                              )
                   );
    
    
    finalize(payloads.empty() ? Time_t(0): payloads.back().time);
  }
 
}

#endif //  POPCON_POPCON_H