BMixingModule.cc

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// File: BMixingModule.cc
// Description:  see BMixingModule.h
// Author:  Ursula Berthon, LLR Palaiseau, Bill Tanenbaum
//
//--------------------------------------------

#include "Mixing/Base/interface/BMixingModule.h"
#include "FWCore/Utilities/interface/GetPassID.h"
#include "FWCore/Version/interface/GetReleaseVersion.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/EventPrincipal.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "DataFormats/Common/interface/Handle.h"

#include "TFile.h"
#include "TH1F.h"

using namespace std;

int edm::BMixingModule::vertexoffset = 0;
const unsigned int edm::BMixingModule::maxNbSources_ =4;

namespace
{
  boost::shared_ptr<edm::PileUp>
  maybeMakePileUp(edm::ParameterSet const& ps,std::string sourceName, const int minb, const int maxb, const bool playback)
  { 
    boost::shared_ptr<edm::PileUp> pileup; // value to be returned
    // Make sure we have a parameter named 'sourceName'
    if (ps.exists(sourceName))
      {
    // We have the parameter
    // and if we have either averageNumber or cfg by luminosity... make the PileUp
    double averageNumber;
        std::string histoFileName=" ";
    std::string histoName =" ";
    TH1F * h = new TH1F("h","h",10,0,10);
    vector<int> dataProbFunctionVar;
    vector<double> dataProb;

    
    const edm::ParameterSet & psin=ps.getParameter<edm::ParameterSet>(sourceName);
    std::string type_=psin.getParameter<std::string>("type");
    if (ps.exists("readDB") && ps.getParameter<bool>("readDB")){
      //in case of DB access, do not try to load anything from the PSet, but wait for beginRun.
      edm::LogError("BMixingModule")<<"Will read from DB: reset to a dummy PileUp object.";
      pileup.reset(new edm::PileUp(psin,0,0,playback));
      return pileup;
    }
    if (type_!="none"){
      if (psin.exists("nbPileupEvents")) {
        edm::ParameterSet psin_average=psin.getParameter<edm::ParameterSet>("nbPileupEvents");
        if (psin_average.exists("averageNumber"))
          {
        averageNumber=psin_average.getParameter<double>("averageNumber");
        pileup.reset(new edm::PileUp(psin,averageNumber,h,playback));
        edm::LogInfo("MixingModule") <<" Created source "<<sourceName<<" with averageNumber "<<averageNumber;
          }
        else if (psin_average.exists("fileName") && psin_average.exists("histoName")) {
        std::string histoFileName = psin_average.getUntrackedParameter<std::string>("fileName");
        std::string histoName = psin_average.getUntrackedParameter<std::string>("histoName");
                        
        TFile *infile = new TFile(histoFileName.c_str());
        TH1F *h = (TH1F*)infile->Get(histoName.c_str());
                
        // Check if the histogram exists           
            if (!h) {
              throw cms::Exception("HistogramNotFound") << " Could not find the histogram " << histoName 
                                    << "in the file " << histoFileName << "." << std::endl;
            }else{
          edm::LogInfo("MixingModule") << "Open a root file " << histoFileName << " containing the probability distribution histogram " << histoName << std::endl;
          edm::LogInfo("MixingModule") << "The PileUp number to be added will be chosen randomly from this histogram" << std::endl;
        }
                
        // Check if the histogram is normalized
        if (((h->Integral() - 1) > 1.0e-02) && ((h->Integral() - 1) < -1.0e-02)) throw cms::Exception("BadHistoDistribution") << "The histogram should be normalized!" << std::endl;
                        
        // Get the averageNumber from the histo 
        averageNumber = h->GetMean();
        
        pileup.reset(new edm::PileUp(psin,averageNumber,h,playback));
        edm::LogInfo("MixingModule") <<" Created source "<<sourceName<<" with averageNumber "<<averageNumber;
          
          }
        else if (psin_average.exists("probFunctionVariable") && psin_average.exists("probValue") && psin_average.exists("histoFileName"))
          {
        if (type_!="probFunction") {
          edm::LogError("MisConfiguration")<<"type is set to: "<<type_<<" while parameters implies probFunction; changing.";
          type_="probFunction";
        }

            dataProbFunctionVar = psin_average.getParameter<vector<int> >("probFunctionVariable");
        dataProb = psin_average.getParameter<vector<double> >("probValue");
            histoFileName = psin_average.getUntrackedParameter<std::string>("histoFileName"); 
                            
        int varSize = (int) dataProbFunctionVar.size();
        int probSize = (int) dataProb.size();
        
        if ((dataProbFunctionVar[0] != 0) || (dataProbFunctionVar[varSize - 1] != (varSize - 1))) 
          throw cms::Exception("BadProbFunction") << "Please, check the variables of the probability function! The first variable should be 0 and the difference between two variables should be 1." << endl;
        
        // Complete the vector containing the probability  function data
        // with the values "0"
        if (probSize < varSize){
          edm::LogInfo("MixingModule") << " The probability function data will be completed with " <<(varSize - probSize)  <<" values 0."; 
          
          for (int i=0; i<(varSize - probSize); i++) dataProb.push_back(0);
          
          probSize = dataProb.size();
          edm::LogInfo("MixingModule") << " The number of the P(x) data set after adding the values 0 is " << probSize;
        }
                    
        // Create an histogram with the data from the probability function provided by the user       
        int xmin = (int) dataProbFunctionVar[0];
        int xmax = (int) dataProbFunctionVar[varSize-1]+1;  // need upper edge to be one beyond last value
        int numBins = varSize;
        
        edm::LogInfo("MixingModule") << "An histogram will be created with " << numBins << " bins in the range ("<< xmin << "," << xmax << ")." << std::endl;
                
        TH1F *hprob = new TH1F("h","Histo from the user's probability function",numBins,xmin,xmax); 
        
        LogDebug("MixingModule") << "Filling histogram with the following data:" << std::endl;
        
        for (int j=0; j < numBins ; j++){
          LogDebug("MixingModule") << " x = " << dataProbFunctionVar[j ]<< " P(x) = " << dataProb[j];
          hprob->Fill(dataProbFunctionVar[j]+0.5,dataProb[j]); // assuming integer values for the bins, fill bin centers, not edges 
        }
                
        // Check if the histogram is normalized
        if ( ((hprob->Integral() - 1) > 1.0e-02) && ((hprob->Integral() - 1) < -1.0e-02)){ 
          throw cms::Exception("BadProbFunction") << "The probability function should be normalized!!! " << endl;
        }
        
        averageNumber = hprob->GetMean();
                
        // Write the created histogram into a root file
        edm::LogInfo("MixingModule") << " The histogram created from the x, P(x) values will be written into the root file " << histoFileName; 
        
        TFile * outfile = new TFile(histoFileName.c_str(),"RECREATE");
        hprob->Write();
        outfile->Write();
        outfile->Close();
        outfile->Delete();      
        
        pileup.reset(new edm::PileUp(psin,averageNumber,hprob,playback));
        edm::LogInfo("MixingModule") <<" Created source "<<sourceName<<" with averageNumber "<<averageNumber;
        
          } 
        //special for pileup input
        else if (sourceName=="input" && psin_average.exists("Lumi") && psin_average.exists("sigmaInel")) {
          averageNumber=psin_average.getParameter<double>("Lumi")*psin_average.getParameter<double>("sigmaInel")*ps.getParameter<int>("bunchspace")/1000*3564./2808.;  //FIXME
          pileup.reset(new
          edm::PileUp(psin,averageNumber,h,playback));
          edm::LogInfo("MixingModule") <<" Created source "<<sourceName<<" with minBunch,maxBunch "<<minb<<" "<<maxb;
          edm::LogInfo("MixingModule")<<" Luminosity configuration, average number used is "<<averageNumber;
        }
      }
    }
      }
    return pileup;
  }
}

namespace edm {

  // Constructor 
  BMixingModule::BMixingModule(const edm::ParameterSet& pset) :
    bunchSpace_(pset.getParameter<int>("bunchspace")),
    minBunch_((pset.getParameter<int>("minBunch")*25)/pset.getParameter<int>("bunchspace")),
    maxBunch_((pset.getParameter<int>("maxBunch")*25)/pset.getParameter<int>("bunchspace")),
    mixProdStep1_(pset.getParameter<bool>("mixProdStep1")),
    mixProdStep2_(pset.getParameter<bool>("mixProdStep2")),
    readDB_(false)
  { 
    if (pset.exists("readDB"))      readDB_=pset.getParameter<bool>("readDB");

    playback_=pset.getUntrackedParameter<bool>("playback",false);

    if (playback_) {
      //this could be explicitely checked
      LogInfo("MixingModule") <<" ATTENTION:Mixing will be done in playback mode! \n"
                              <<" ATTENTION:Mixing Configuration must be the same as for the original mixing!";
    }

    // Just for debugging print out.
    sourceNames_.push_back("input");
    sourceNames_.push_back("cosmics");
    sourceNames_.push_back("beamhalo_plus");
    sourceNames_.push_back("beamhalo_minus");

    for (size_t makeIdx = 0; makeIdx < maxNbSources_; makeIdx++ ) {
      inputSources_.push_back(maybeMakePileUp(pset,sourceNames_[makeIdx],
                                              minBunch_,maxBunch_,playback_));
      if (inputSources_.back()) inputSources_.back()->input(makeIdx);
    }
  }

  // Virtual destructor needed.
  BMixingModule::~BMixingModule() {;}

  // method call at begin run/lumi to reload the mixing configuration
  void BMixingModule::beginLuminosityBlock(edm::LuminosityBlock&, edm::EventSetup const&setup){
    update(setup);
  }
  void BMixingModule::beginRun(edm::Run & r, const edm::EventSetup & setup){
    update(setup);
  }

  void BMixingModule::update(const edm::EventSetup & setup){
    if (readDB_ && parameterWatcher_.check(setup)){
      for (size_t makeIdx = 0; makeIdx < maxNbSources_; makeIdx++ ) {
    if (inputSources_[makeIdx]) inputSources_[makeIdx]->reload(setup);
      }
      reload(setup);
    }
  }

  // Functions that get called by framework every event
  void BMixingModule::produce(edm::Event& e, const edm::EventSetup& setup) { 

    // Check if the signal is present in the root file 
    // for all the objects we want to mix
    checkSignal(e);
    
    // Create EDProduct
    createnewEDProduct();

    // Add signals
    if (!mixProdStep1_){ 
      addSignals(e,setup);
    }

    doPileUp(e,setup);

    // Put output into event (here only playback info)
    put(e,setup);
  }

  void BMixingModule::dropUnwantedBranches(std::vector<std::string> const& wantedBranches) {
    for (size_t dropIdx=0; dropIdx<maxNbSources_; dropIdx++ ) {
      if( inputSources_[dropIdx] ) inputSources_[dropIdx]->dropUnwantedBranches(wantedBranches);
    }
  }

  void BMixingModule::endJob() {
    for (size_t endIdx=0; endIdx<maxNbSources_; endIdx++ ) {
      if( inputSources_[endIdx] ) inputSources_[endIdx]->endJob();
    }
  }

} //edm