EventRecording.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2020 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#pragma once

#include "Acts/Definitions/Algebra.hpp"
#include "Acts/Propagator/MaterialInteractor.hpp"
#include "Acts/Utilities/Logger.hpp"
#include "ActsExamples/EventData/SimParticle.hpp"
#include "ActsExamples/Framework/DataHandle.hpp"
#include "ActsExamples/Framework/IAlgorithm.hpp"
#include "ActsExamples/Framework/ProcessCode.hpp"
#include "ActsExamples/Framework/SequenceElement.hpp"

#include <memory>
#include <mutex>

#include <HepMC3/GenEvent.h>

class G4RunManager;

namespace ActsExamples {

class DetectorConstructionFactory;

class EventRecording final : public ActsExamples::IAlgorithm {
 public:
  struct Config {
    std::string inputParticles = "";
    std::string outputHepMcTracks = "geant-outcome-tracks";

    std::shared_ptr<DetectorConstructionFactory> detectorConstructionFactory;

    int seed1 = 12345;
    int seed2 = 45678;

    std::vector<std::string> processesCombine;
    std::string processSelect;
    std::vector<std::string> processesReject;
  };

  EventRecording(const Config& config, Acts::Logging::Level level);

  ~EventRecording() override;

  ActsExamples::ProcessCode execute(
      const AlgorithmContext& context) const override;

  const Config& config() const { return m_cfg; }

 private:
  Config m_cfg;
  std::unique_ptr<G4RunManager> m_runManager;

  ReadDataHandle<SimParticleContainer> m_inputParticles{this, "InputParticles"};
  WriteDataHandle<std::vector<HepMC3::GenEvent>> m_outputEvents{this,
                                                                "OutputEvents"};

  // has to be mutable; algorithm interface enforces object constness
  mutable std::mutex m_runManagerLock;
};
}  // namespace ActsExamples