xAODMaker::xAODTruthCnvAlg::MetaDataWriter Class Reference

Factor out the pieces dealing with writing to meta data. More...

Collaboration diagram for xAODMaker::xAODTruthCnvAlg::MetaDataWriter:

Public Member Functions
StatusCode	initialize (ServiceHandle< StoreGateSvc > &metaStore, const std::string &metaName)
StatusCode	maybeWrite (uint32_t mcChannelNumber, const HepMC::GenEvent &genEvt, const MetadataFields &metaFields)

Private Types
typedef std::lock_guard< std::mutex >	lock_t

Private Attributes
std::mutex	m_mutex
	Mutex to control access to meta data writing. More...
xAOD::TruthMetaDataContainer *	m_tmd = nullptr
	The meta data container to be written out. More...
std::unordered_set< uint32_t >	m_existingMetaDataChan
	Set for tracking the mc channels for which we already added meta data. More...

Detailed Description

Factor out the pieces dealing with writing to meta data.

This will be non-const, so need to protect with a mutex.

Definition at line 94 of file xAODTruthCnvAlg.h.

Member Typedef Documentation

lock_t

typedef std::lock_guard<std::mutex> xAODMaker::xAODTruthCnvAlg::MetaDataWriter::lock_t

private

Definition at line 106 of file xAODTruthCnvAlg.h.

Member Function Documentation

initialize()

StatusCode xAODMaker::xAODTruthCnvAlg::MetaDataWriter::initialize	(	ServiceHandle< StoreGateSvc > &	metaStore,
		const std::string &	metaName
	)

Definition at line 610 of file xAODTruthCnvAlg.cxx.

    {
      ATH_CHECK( metaStore.retrieve() );
 
      auto md = std::make_unique<xAOD::TruthMetaDataContainer>();
      m_tmd = md.get();
 
      auto aux = std::make_unique<xAOD::TruthMetaDataAuxContainer>();
      md->setStore( aux.get() );
 
      // Record the trigger configuration metadata into it:
      CHECK( metaStore->record( std::move (aux), metaName + "Aux." ) );
      CHECK( metaStore->record( std::move (md),  metaName ) );
      return StatusCode::SUCCESS;
    }

maybeWrite()

StatusCode xAODMaker::xAODTruthCnvAlg::MetaDataWriter::maybeWrite	(	uint32_t	mcChannelNumber,
		const HepMC::GenEvent &	genEvt,
		const MetadataFields &	metaFields
	)

Definition at line 629 of file xAODTruthCnvAlg.cxx.

    {
      // This bit needs to be serialized.
      lock_t lock (m_mutex);
 
      //Inserting in a (unordered_)set returns an <iterator, boolean> pair, where the boolean
      //is used to check if the key already exists (returns false in the case it exists)
      if( m_existingMetaDataChan.insert(mcChannelNumber).second ) {
        m_tmd->push_back (std::make_unique <xAOD::TruthMetaData>());
        xAOD::TruthMetaData* md = m_tmd->back();
 
#ifdef HEPMC3
        md->setMcChannelNumber(mcChannelNumber);
        std::vector<std::string> orderedWeightNameVec;
        if (!genEvt.run_info()) {
          for (size_t i=0; i<genEvt.weights().size();i++) orderedWeightNameVec.push_back(std::to_string(i));
        } else {
          if (!genEvt.run_info()->weight_names().empty()) {
            orderedWeightNameVec = genEvt.weight_names();
          } else {
            //AV This to be decided. It is always a good idea to have a default weight 1.0.
            //orderedWeightNameVec.push_back("0");
          }
        }
        md->setWeightNames(orderedWeightNameVec);
#else
        // FIXME: class member protection violation here.
        // This appears to be because WeightContainer has no public methods
        // to get information about the weight names.
        const auto& weightNameMap = genEvt.weights().m_names;
        std::vector<std::string> orderedWeightNameVec;
        orderedWeightNameVec.reserve( weightNameMap.size() );
        for (const auto& entry: weightNameMap) {
          orderedWeightNameVec.push_back(entry.first);
        }
 
        //The map from the HepMC record pairs the weight names with a corresponding index,
        //it is not guaranteed that the indices are ascending when iterating over the map
        std::sort(orderedWeightNameVec.begin(), orderedWeightNameVec.end(),
                  [&](const std::string& i, const std::string& j){return weightNameMap.at(i) < weightNameMap.at(j);});
 
        md->setMcChannelNumber(mcChannelNumber);
        md->setWeightNames( orderedWeightNameVec );
#endif
 
        if(!metaFields.lhefGenerator.empty()) {
          md->setLhefGenerator(metaFields.lhefGenerator);
        }
        if(!metaFields.generators.empty()) {
          md->setGenerators(metaFields.generators);
        }
        if(!metaFields.evgenProcess.empty()) {
          md->setEvgenProcess(metaFields.evgenProcess);
        }
        if(!metaFields.evgenTune.empty()) {
          md->setEvgenTune(metaFields.evgenTune);
        }
        if(!metaFields.hardPDF.empty()) {
          md->setHardPDF(metaFields.hardPDF);
        }
        if(!metaFields.softPDF.empty()) {
          md->setSoftPDF(metaFields.softPDF);
        }
      }
 
      return StatusCode::SUCCESS;
    }

Member Data Documentation

m_existingMetaDataChan

std::unordered_set<uint32_t> xAODMaker::xAODTruthCnvAlg::MetaDataWriter::m_existingMetaDataChan

private

Set for tracking the mc channels for which we already added meta data.

Definition at line 112 of file xAODTruthCnvAlg.h.

m_mutex

std::mutex xAODMaker::xAODTruthCnvAlg::MetaDataWriter::m_mutex

private

Mutex to control access to meta data writing.

Definition at line 105 of file xAODTruthCnvAlg.h.

m_tmd

xAOD::TruthMetaDataContainer* xAODMaker::xAODTruthCnvAlg::MetaDataWriter::m_tmd = nullptr

private

The meta data container to be written out.

Definition at line 109 of file xAODTruthCnvAlg.h.

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The documentation for this class was generated from the following files:

• xAODTruthCnvAlg.h
• xAODTruthCnvAlg.cxx