BeamBkgMixerModule.cc

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
// Own header.
#include <background/modules/BeamBkgMixer/BeamBkgMixerModule.h>
 
// framework - DataStore
#include <framework/datastore/DataStore.h>
#include <framework/datastore/StoreArray.h>
#include <framework/datastore/StoreObjPtr.h>
 
// framework aux
#include <framework/core/ModuleParam.templateDetails.h>
#include <framework/logging/Logger.h>
 
// SimHits
#include <pxd/dataobjects/PXDSimHit.h>
#include <svd/dataobjects/SVDSimHit.h>
#include <cdc/dataobjects/CDCSimHit.h>
#include <top/dataobjects/TOPSimHit.h>
#include <arich/dataobjects/ARICHSimHit.h>
#include <ecl/dataobjects/ECLHit.h>
#include <klm/dataobjects/KLMSimHit.h>
#include <simulation/dataobjects/BeamBackHit.h>
 
// MetaData
#include <framework/dataobjects/BackgroundInfo.h>
 
// Root
#include <TFile.h>
#include <TRandom3.h>
 
//std::find
#include <algorithm>
 
using namespace std;
using namespace Belle2;
 
//-----------------------------------------------------------------
//                 Register module
//-----------------------------------------------------------------
 
REG_MODULE(BeamBkgMixer);
 
//-----------------------------------------------------------------
//                 Implementation
//-----------------------------------------------------------------
 
BeamBkgMixerModule::BeamBkgMixerModule() : Module()
{
  // set module description (e.g. insert text)
  setDescription("Beam background mixer at SimHit level that uses beam background"
                 " simulation output directly (collision files) and not ROF files. "
                 "Each background event is shifted in time randomly within "
                 "a time window specified with minTime and maxTime.");
 
  // Add parameters
  addParam("backgroundFiles", m_backgroundFiles,
           "List of background (collision) files (wildcards not allowed - "
           "use python glob.glob() to expand to list of files)");
  addParam("minTime", m_minTime,
           "Time window lower edge in nano seconds", -1000.0);
  addParam("maxTime", m_maxTime,
           "Time window upper edge in nano seconds", 800.0);
  addParam("overallScaleFactor", m_overallScaleFactor,
           "Overall factor to scale rates of backgrounds", 1.0);
  addParam("scaleFactors", m_scaleFactors,
           "Factors to scale rates of backgrounds. "
           "Possible tag names: " + m_bgTypes.getBGTypes(),
           m_scaleFactors);
  addParam("components", m_components,
           "Detector components to be included, empty list means all components",
           m_components);
  addParam("wrapAround", m_wrapAround,
           "if true wrap around events passing time window upper edge", true);
  addParam("minTimeECL", m_minTimeECL,
           "Time window lower edge for ECL in nano seconds", -17600.0);
  addParam("maxTimeECL", m_maxTimeECL,
           "Time window upper edge for ECL in nano seconds", 8500.0);
  addParam("minTimePXD", m_minTimePXD,
           "Time window lower edge for PXD in nano seconds", -10000.0);
  addParam("maxTimePXD", m_maxTimePXD,
           "Time window upper edge for PXD in nano seconds", 10000.0);
 
  addParam("beambackhits", m_BeamBackHits,
           "If true also add the BeamBackHits collection for the selected "
           "subdetectors to the output file", false);
 
  addParam("maxEdepECL", m_maxEdepECL,
           "maximal deposited energy of ECLHit to accept BG event for mixing"
           "(0 means accept all events)", 1.0);
 
  addParam("cacheSize", m_cacheSize,
           "file cache size in Mbytes. If negative, use root default", 0);
}
 
 
void BeamBkgMixerModule::initialize()
{
 
  // included components
 
  std::vector<std::string> components = m_components;
  m_PXD = isComponentIncluded(components, "PXD");
  m_SVD = isComponentIncluded(components, "SVD");
  m_CDC = isComponentIncluded(components, "CDC");
  m_TOP = isComponentIncluded(components, "TOP");
  m_ARICH = isComponentIncluded(components, "ARICH");
  m_ECL = isComponentIncluded(components, "ECL");
  m_KLM = isComponentIncluded(components, "KLM");
 
  // ignore these ones
 
  isComponentIncluded(components, "MagneticField2d");
  isComponentIncluded(components, "MagneticField3d");
  isComponentIncluded(components, "MagneticField");
  isComponentIncluded(components, "MagneticFieldConstant4LimitedRCDC");
  isComponentIncluded(components, "MagneticFieldConstant4LimitedRSVD");
  isComponentIncluded(components, "BeamPipe");
  isComponentIncluded(components, "Cryostat");
  isComponentIncluded(components, "FarBeamLine");
  isComponentIncluded(components, "HeavyMetalShield");
  isComponentIncluded(components, "COIL");
  isComponentIncluded(components, "STR");
  isComponentIncluded(components, "VXDService");
 
  if (!components.empty()) {
    std::string str;
    for (unsigned i = 0; i < components.size(); ++i) str = str + " " + components[i];
    B2WARNING("Unknown components:" << str);
  }
 
  // check files and append them to sample container
 
  for (const auto& file : m_backgroundFiles) {
 
    // wildcarding is not allowed anymore
    if (TString(file.c_str()).Contains("*")) {
      B2ERROR(file << ": wildcards are not allowed");
      continue;
    }
 
    // check the file existence
    TFile* f = TFile::Open(file.c_str(), "READ");
    if (!f) {
      B2ERROR(file << ": file not found");
      continue;
    }
    if (!f->IsOpen()) {
      B2ERROR(file << ": can't open file");
      continue;
    }
    f->Close();
 
    TChain persistent("persistent");
    int nFiles = persistent.Add(file.c_str());
    if (nFiles == 0) {
      B2ERROR(file << ": no such files");
      continue;
    }
    if (persistent.GetEntries() == 0) {
      B2ERROR(file << ": tree 'persistent' has no entries");
      continue;
    }
 
    TObject* bkgMetaData = 0; // Note: allocation left to root
    TBranch* branchBMD = persistent.GetBranch("BackgroundMetaData");
    if (!branchBMD) {
      B2ERROR(file << ": branch 'BackgroundMetaData' not found");
      continue;
    }
    branchBMD->SetAddress(&bkgMetaData);
 
    std::vector<BackgroundMetaData::BG_TAG> tags;
    std::vector<std::string> types;
    std::vector<BackgroundMetaData::EFileType> fileTypes;
    double realTime = 0;
    for (unsigned k = 0; k < persistent.GetEntries(); k++) {
      persistent.GetEntry(k);
      const BackgroundMetaData* bgMD = static_cast<BackgroundMetaData*>(bkgMetaData);
      tags.push_back(bgMD->getBackgroundTag());
      types.push_back(bgMD->getBackgroundType());
      fileTypes.push_back(bgMD->getFileType());
      realTime += bgMD->getRealTime();
    }
    if (realTime <= 0) {
      B2ERROR(file << ": invalid realTime: " << realTime);
      continue;
    }
    for (unsigned i = 1; i < tags.size(); ++i) {
      if (tags[i] != tags[0]) {
        B2ERROR(file << ": files with mixed background types not supported");
        continue;
      }
    }
    for (unsigned i = 1; i < fileTypes.size(); ++i) {
      if (fileTypes[i] != fileTypes[0]) {
        B2ERROR(file << ": files with mixed file types not supported");
        continue;
      }
    }
 
    appendSample(tags[0], types[0], file, realTime, fileTypes[0]);
 
  }
 
 
  // set scale factors
 
  for (auto scaleFactor : m_scaleFactors) {
    std::string type = std::get<0>(scaleFactor);
    if (m_bgTypes.getTag(type) == 0)
      B2ERROR("Unknown beam background type found in 'scaleFactors': " << type << "\n"
              "Possible are: " + m_bgTypes.getBGTypes());
    for (auto& bkg : m_backgrounds) {
      if (bkg.tag == m_bgTypes.getTag(type))
        bkg.scaleFactor *= std::get<1>(scaleFactor);
    }
  }
 
  // open files for reading SimHits
 
  for (auto& bkg : m_backgrounds) {
 
    // define TChain for reading SimHits
    bkg.tree.reset(new TChain("tree"));
    for (unsigned i = 0; i < bkg.fileNames.size(); ++i) {
      bkg.numFiles += bkg.tree->Add(bkg.fileNames[i].c_str());
    }
 
    bkg.numEvents = bkg.tree->GetEntries();
    bkg.rate =  bkg.numEvents / bkg.realTime * bkg.scaleFactor;
 
    if (m_cacheSize >= 0) bkg.tree->SetCacheSize(m_cacheSize * 1024 * 1024);
 
    if (m_PXD and bkg.tree->GetBranch("PXDSimHits"))
      bkg.tree->SetBranchAddress("PXDSimHits", &m_simHits.PXD);
    if (m_SVD and bkg.tree->GetBranch("SVDSimHits"))
      bkg.tree->SetBranchAddress("SVDSimHits", &m_simHits.SVD);
    if (m_CDC and bkg.tree->GetBranch("CDCSimHits"))
      bkg.tree->SetBranchAddress("CDCSimHits", &m_simHits.CDC);
    if (m_TOP and bkg.tree->GetBranch("TOPSimHits"))
      bkg.tree->SetBranchAddress("TOPSimHits", &m_simHits.TOP);
    if (m_ARICH and bkg.tree->GetBranch("ARICHSimHits"))
      bkg.tree->SetBranchAddress("ARICHSimHits", &m_simHits.ARICH);
    if (m_ECL and bkg.tree->GetBranch("ECLHits"))
      bkg.tree->SetBranchAddress("ECLHits", &m_simHits.ECL);
    if (m_KLM and bkg.tree->GetBranch("KLMSimHits"))
      bkg.tree->SetBranchAddress("KLMSimHits", &m_simHits.KLM);
 
    if (m_BeamBackHits and bkg.tree->GetBranch("BeamBackHits"))
      bkg.tree->SetBranchAddress("BeamBackHits", &m_simHits.BeamBackHits);
 
    // print INFO
    std::string unit(" ns");
    double realTime = bkg.realTime;
    if (realTime >= 1000.0) {realTime /= 1000.0; unit = " us";}
    if (realTime >= 1000.0) {realTime /= 1000.0; unit = " ms";}
    if (realTime >= 1000.0) {realTime /= 1000.0; unit = " s";}
 
    B2INFO("BeamBkgMixer: " << bkg.type <<
           " tag=" << bkg.tag <<
           " files=" << bkg.numFiles <<
           " events=" << bkg.numEvents <<
           " realTime=" << realTime << unit <<
           " scaleFactor=" << bkg.scaleFactor <<
           " rate=" << bkg.rate * 1000 << " MHz");
  }
 
 
  // SimHits registration
 
  StoreArray<PXDSimHit> pxdSimHits;
  if (m_PXD) pxdSimHits.registerInDataStore();
 
  StoreArray<SVDSimHit> svdSimHits;
  if (m_SVD) svdSimHits.registerInDataStore();
 
  StoreArray<CDCSimHit> cdcSimHits;
  if (m_CDC) cdcSimHits.registerInDataStore();
 
  StoreArray<TOPSimHit> topSimHits;
  if (m_TOP) topSimHits.registerInDataStore();
 
  StoreArray<ARICHSimHit> arichSimHits;
  if (m_ARICH) arichSimHits.registerInDataStore();
 
  StoreArray<ECLHit> eclHits;
  if (m_ECL) eclHits.registerInDataStore();
 
  StoreArray<KLMSimHit> klmSimHits;
  if (m_KLM) klmSimHits.registerInDataStore();
 
  StoreArray<BeamBackHit> beamBackHits;
  if (m_BeamBackHits) beamBackHits.registerInDataStore();
 
 
  // add BackgroundInfo to persistent tree
 
  StoreObjPtr<BackgroundInfo> bkgInfo("", DataStore::c_Persistent);
  bkgInfo.registerInDataStore();
  bkgInfo.create();
  bkgInfo->setMethod(BackgroundInfo::c_Mixing);
  bkgInfo->setComponents(m_components);
  bkgInfo->setMinTime(m_minTime);
  bkgInfo->setMaxTime(m_maxTime);
  bkgInfo->setMinTimeECL(m_minTimeECL);
  bkgInfo->setMaxTimeECL(m_maxTimeECL);
  bkgInfo->setMinTimePXD(m_minTimePXD);
  bkgInfo->setMaxTimePXD(m_maxTimePXD);
  bkgInfo->setWrapAround(m_wrapAround);
  bkgInfo->setMaxEdepECL(m_maxEdepECL);
  for (const auto& bkg : m_backgrounds) {
    BackgroundInfo::BackgroundDescr descr;
    descr.tag = bkg.tag;
    descr.type = bkg.type;
    descr.fileType = bkg.fileType;
    descr.fileNames = bkg.fileNames;
    descr.realTime = bkg.realTime;
    descr.numEvents = bkg.numEvents;
    descr.scaleFactor = bkg.scaleFactor;
    descr.rate = bkg.rate;
    descr.reused = 0;
    bkgInfo->appendBackgroundDescr(descr);
  }
 
}
 
void BeamBkgMixerModule::event()
{
  StoreArray<PXDSimHit> pxdSimHits;
  StoreArray<SVDSimHit> svdSimHits;
  StoreArray<CDCSimHit> cdcSimHits;
  StoreArray<TOPSimHit> topSimHits;
  StoreArray<ARICHSimHit> arichSimHits;
  StoreArray<ECLHit> eclHits;
  StoreArray<KLMSimHit> klmSimHits;
  StoreArray<BeamBackHit> beamBackHits;
  StoreObjPtr<BackgroundInfo> bkgInfo("", DataStore::c_Persistent);
 
  for (auto& bkg : m_backgrounds) {
 
    if (bkg.fileType != BackgroundMetaData::c_Usual) continue;
 
    double mean = bkg.rate * (m_maxTime - m_minTime);
    int nev = gRandom->Poisson(mean);
 
    for (int iev = 0; iev < nev; iev++) {
      double timeShift = gRandom->Rndm() * (m_maxTime - m_minTime) + m_minTime;
      bkg.tree->GetEntry(bkg.eventCount);
 
      if (acceptEvent(m_simHits.ECL)) {
        addSimHits(pxdSimHits, m_simHits.PXD, timeShift, m_minTime, m_maxTime);
        addSimHits(svdSimHits, m_simHits.SVD, timeShift, m_minTime, m_maxTime);
        addSimHits(cdcSimHits, m_simHits.CDC, timeShift, m_minTime, m_maxTime);
        addSimHits(topSimHits, m_simHits.TOP, timeShift, m_minTime, m_maxTime);
        addSimHits(arichSimHits, m_simHits.ARICH, timeShift, m_minTime, m_maxTime);
        addSimHits(eclHits, m_simHits.ECL, timeShift, m_minTime, m_maxTime);
        addSimHits(klmSimHits, m_simHits.KLM, timeShift, m_minTime, m_maxTime);
        addBeamBackHits(beamBackHits, m_simHits.BeamBackHits, timeShift,
                        m_minTime, m_maxTime);
      } else {
        iev--;
        std::string message = "BeamBkgMixer: event " + to_string(bkg.eventCount)
                              + " of " + bkg.type + " rejected due to large energy deposit in ECL";
        m_rejected[message] += 1;
        m_rejectedCount++;
        if (m_rejectedCount < 10) {
          B2INFO("BeamBkgMixer: event rejected due to large energy deposit in ECL");
        } else if (m_rejectedCount == 10) {
          B2INFO("BeamBkgMixer: event rejected due to large energy deposit in ECL "
                 << "(message will be suppressed now)");
        }
      }
 
      bkg.eventCount++;
      if (bkg.eventCount >= bkg.numEvents) {
        bkg.eventCount = 0;
        std::string message = "BeamBkgMixer: events of " + bkg.type + " will be reused";
        m_reused[message] += 1;
        if (m_reused[message] == 1) B2INFO(message);
        bkgInfo->incrementReusedCounter(bkg.index);
      }
    }
  }
 
 
  for (auto& bkg : m_backgrounds) {
 
    if (bkg.fileType != BackgroundMetaData::c_ECL) continue;
 
    double mean = bkg.rate * (m_maxTimeECL - m_minTimeECL);
    int nev = gRandom->Poisson(mean);
 
    for (int iev = 0; iev < nev; iev++) {
      double timeShift = gRandom->Rndm() * (m_maxTimeECL - m_minTimeECL) + m_minTimeECL;
      if (timeShift > m_minTime and timeShift < m_maxTime) continue;
      bkg.tree->GetEntry(bkg.eventCount);
 
      if (acceptEvent(m_simHits.ECL)) {
        double minTime = m_minTimeECL;
        double maxTime = m_maxTimeECL;
        if (timeShift <= m_minTime) {
          maxTime = m_minTime;
        } else {
          minTime = m_maxTime;
        }
        addSimHits(eclHits, m_simHits.ECL, timeShift, minTime, maxTime);
      } else {
        iev--;
        std::string message = "BeamBkgMixer: event " + to_string(bkg.eventCount)
                              + " of " + bkg.type + " rejected due to large energy deposit in ECL";
        m_rejected[message] += 1;
        m_rejectedCount++;
        if (m_rejectedCount < 10) {
          B2INFO("BeamBkgMixer: event rejected due to large energy deposit in ECL");
        } else if (m_rejectedCount == 10) {
          B2INFO("BeamBkgMixer: event rejected due to large energy deposit in ECL "
                 << "(message will be suppressed now)");
        }
      }
 
      bkg.eventCount++;
      if (bkg.eventCount >= bkg.numEvents) {
        bkg.eventCount = 0;
        std::string message = "BeamBkgMixer: events of " + bkg.type + " will be reused";
        m_reused[message] += 1;
        if (m_reused[message] == 1) B2INFO(message);
        bkgInfo->incrementReusedCounter(bkg.index);
      }
    }
 
  }
 
 
  for (auto& bkg : m_backgrounds) {
 
    if (bkg.fileType != BackgroundMetaData::c_PXD) continue;
 
    double mean = bkg.rate * (m_maxTimePXD - m_minTimePXD);
    int nev = gRandom->Poisson(mean);
 
    for (int iev = 0; iev < nev; iev++) {
      double timeShift = gRandom->Rndm() * (m_maxTimePXD - m_minTimePXD) + m_minTimePXD;
      if (timeShift > m_minTime and timeShift < m_maxTime) continue;
      bkg.tree->GetEntry(bkg.eventCount);
 
      double minTime = m_minTimePXD;
      double maxTime = m_maxTimePXD;
      if (timeShift <= m_minTime) {
        maxTime = m_minTime;
      } else {
        minTime = m_maxTime;
      }
      addSimHits(pxdSimHits, m_simHits.PXD, timeShift, minTime, maxTime);
 
      bkg.eventCount++;
      if (bkg.eventCount >= bkg.numEvents) {
        bkg.eventCount = 0;
        std::string message = "BeamBkgMixer: events of " + bkg.type + " will be reused";
        m_reused[message] += 1;
        if (m_reused[message] == 1) B2INFO(message);
        bkgInfo->incrementReusedCounter(bkg.index);
      }
    }
 
  }
 
}
 
 
void BeamBkgMixerModule::terminate()
{
 
  B2INFO("BeamBkgMixer - reused samples:");
  for (const auto& message : m_reused) {
    B2INFO(message.first << "(occurred " << message.second << " times)");
  }
  B2INFO("BeamBkgMixer - rejected events:");
  for (const auto& message : m_rejected) {
    B2INFO(message.first << "(occurred " << message.second << " times)");
  }
 
  for (auto& bkg : m_backgrounds) {
    bkg.tree.reset();
  }
 
}
 
 
bool BeamBkgMixerModule::isComponentIncluded(std::vector<std::string>& components,
                                             const std::string& component)
{
  if (m_components.empty()) return true;
  auto iterator = std::find(components.begin(), components.end(), component);
  if (iterator != components.end()) {
    components.erase(iterator);
    return true;
  }
  return false;
}
 
 
void BeamBkgMixerModule::appendSample(BackgroundMetaData::BG_TAG  tag,
                                      const std::string& type,
                                      const std::string& fileName,
                                      double realTime,
                                      BackgroundMetaData::EFileType fileType)
{
  for (auto& bkg : m_backgrounds) {
    if (tag == bkg.tag and fileType == bkg.fileType) {
      bkg.fileNames.push_back(fileName);
      bkg.realTime += realTime;
      return;
    }
  }
  std::string ftype = type;
  if (fileType == BackgroundMetaData::c_ECL) ftype += "(ECL)";
  if (fileType == BackgroundMetaData::c_PXD) ftype += "(PXD)";
  unsigned index = m_backgrounds.size();
  m_backgrounds.push_back(BkgFiles(tag, ftype, fileName, realTime,
                                   m_overallScaleFactor, fileType, index));
}
 
 
bool BeamBkgMixerModule::acceptEvent(TClonesArray* cloneArrayECL)
{
  if (!cloneArrayECL) return true;
  if (m_maxEdepECL == 0) return true;
 
  int numEntries = cloneArrayECL->GetEntriesFast();
  for (int i = 0; i < numEntries; i++) {
    const ECLHit* simHit = static_cast<ECLHit*>(cloneArrayECL->AddrAt(i));
    if (simHit->getEnergyDep() > m_maxEdepECL) return false;
  }
  return true;
}