RecPointReaderSpec.cxx

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
 
#include <vector>
 
#include "Framework/ConfigParamRegistry.h"
#include "Framework/ControlService.h"
#include "Framework/Logger.h"
#include "FT0Workflow/RecPointReaderSpec.h"
#include "CommonUtils/NameConf.h"
 
using namespace o2::framework;
using namespace o2::ft0;
 
namespace o2
{
namespace ft0
{
 
RecPointReader::RecPointReader(bool useMC)
{
  mUseMC = useMC;
  if (useMC) {
    LOG(warning) << "FT0 RecPoint reader at the moment does not process MC";
  }
}
 
void RecPointReader::init(InitContext& ic)
{
  mInputFileName = o2::utils::Str::concat_string(o2::utils::Str::rectifyDirectory(ic.options().get<std::string>("input-dir")),
                                                 ic.options().get<std::string>("infile"));
  connectTree(mInputFileName);
}
 
void RecPointReader::run(ProcessingContext& pc)
{
  auto ent = mTree->GetReadEntry() + 1;
  // A timeframe holds no collision at all whenever the interaction rate is low enough, and
  // the tree then has no entry to read. Publish empty containers instead of reading past the
  // end and pushing branch addresses that GetEntry has not filled, so that the consumers
  // downstream still see the timeframe. (This used to be an assert, which is compiled out of
  // every production build since ENABLE_CASSERT defaults to OFF.)
  const bool noEntry = ent >= mTree->GetEntries();
  if (noEntry) {
    LOG(info) << "no entry to read, publishing empty output";
  } else {
    mTree->GetEntry(ent);
  }
 
  static const std::vector<o2::ft0::RecPoints> noRecPoints;
  static const std::vector<o2::ft0::ChannelDataFloat> noChannelData;
  const auto& recPoints = noEntry ? noRecPoints : *mRecPoints;
  const auto& channelData = noEntry ? noChannelData : *mChannelData;
  LOG(debug) << "FT0 RecPointReader pushes " << recPoints.size() << " recpoints with " << channelData.size() << " channels at entry " << ent;
  pc.outputs().snapshot(Output{mOrigin, "RECPOINTS", 0}, recPoints);
  pc.outputs().snapshot(Output{mOrigin, "RECCHDATA", 0}, channelData);
 
  if (noEntry || mTree->GetReadEntry() + 1 >= mTree->GetEntries()) {
    pc.services().get<ControlService>().endOfStream();
    pc.services().get<ControlService>().readyToQuit(QuitRequest::Me);
  }
}
 
void RecPointReader::connectTree(const std::string& filename)
{
  mTree.reset(nullptr); // in case it was already loaded
  mFile.reset(TFile::Open(filename.c_str()));
  assert(mFile && !mFile->IsZombie());
  mTree.reset((TTree*)mFile->Get(mRecPointTreeName.c_str()));
  assert(mTree);
 
  mTree->SetBranchAddress(mRecPointBranchName.c_str(), &mRecPoints);
  mTree->SetBranchAddress(mChannelDataBranchName.c_str(), &mChannelData);
  if (mUseMC) {
    LOG(warning) << "MC-truth is not supported for FT0 recpoints currently";
    mUseMC = false;
  }
 
  LOG(info) << "Loaded FT0 RecPoints tree from " << filename << " with " << mTree->GetEntries() << " entries";
}
 
DataProcessorSpec getRecPointReaderSpec(bool useMC)
{
  std::vector<OutputSpec> outputSpec;
  outputSpec.emplace_back(o2::header::gDataOriginFT0, "RECPOINTS", 0, Lifetime::Timeframe);
  outputSpec.emplace_back(o2::header::gDataOriginFT0, "RECCHDATA", 0, Lifetime::Timeframe);
  if (useMC) {
    LOG(warning) << "MC-truth is not supported for FT0 recpoints currently";
  }
 
  return DataProcessorSpec{
    "ft0-recpoints-reader",
    Inputs{},
    outputSpec,
    AlgorithmSpec{adaptFromTask<RecPointReader>()},
    Options{
      {"infile", VariantType::String, "o2reco_ft0.root", {"Name of the input file"}},
      {"input-dir", VariantType::String, "none", {"Input directory"}}}};
}
 
} // namespace ft0
} // namespace o2