TaskManager.hpp

/* Copyright (C) 2019-2021 GSI, Universität Tübingen
   SPDX-License-Identifier: GPL-3.0-only
   Authors: Viktor Klochkov, Ilya Selyuzhenkov */
#ifndef ANALYSISTREE_INFRA_TASKMANANGERNEW_HPP_
#define ANALYSISTREE_INFRA_TASKMANANGERNEW_HPP_
 
#include <chrono>
#include <iostream>
#include <string>
#include <utility>
#include <vector>
 
#include "Chain.hpp"
#include "Cuts.hpp"
#include "Matching.hpp"
#include "Task.hpp"
 
class TTree;
class TFile;
class TChain;
 
namespace AnalysisTree {
 
class Configuration;
 
enum class eBranchWriteMode {
  kCreateNewTree,
  kCopyTree,
  kNone
};
 
class TaskManager {
 
 public:
  static TaskManager* GetInstance();
 
  TaskManager(TaskManager& other) = delete;
  void operator=(const TaskManager&) = delete;
  virtual ~TaskManager();

  void SetOwnsTasks(bool owns_flag = true) { is_owns_tasks_ = owns_flag; }

  virtual void Init(const std::vector<std::string>& filelists, const std::vector<std::string>& in_trees);

  virtual void Init();
  virtual void Run(long long nEvents = -1);
  virtual void Finish();
 
  void AddTask(Task* task) { tasks_.emplace_back(task); }

  template<class BranchPtr>
  void AddBranch(BranchPtr*& ptr, const BranchConfig& config) {
    if (out_tree_ == nullptr) {
      throw std::runtime_error("No output tree. Probably, TaskManager::Init() was not called or output file/tree names are not set.");
    }
 
    if (!ptr) {
      ptr = new BranchPtr(config.GetId());
    } else if (ptr->GetId() != config.GetId()) {
      std::cout << "WARNING! ptr->GetId() != config.GetId()!" << std::endl;
      ptr = new BranchPtr(config.GetId());
    }
    configuration_->AddBranchConfig(config);
    if (write_mode_ == eBranchWriteMode::kCreateNewTree) {
      chain_->GetConfiguration()->AddBranchConfig(config);
    }
 
    out_tree_->Branch((config.GetName() + ".").c_str(), &ptr);
  }
 
  void AddBranch(Branch* branch) {
    switch (branch->GetBranchType()) {
      case DetType::kParticle: {
        AddBranch(branch->GetDataRaw<Particles*>(), branch->GetConfig());
        break;
      }
      case DetType::kTrack: {
        AddBranch(branch->GetDataRaw<TrackDetector*>(), branch->GetConfig());
        break;
      }
      case DetType::kHit: {
        AddBranch(branch->GetDataRaw<HitDetector*>(), branch->GetConfig());
        break;
      }
      case DetType::kModule: {
        AddBranch(branch->GetDataRaw<ModuleDetector*>(), branch->GetConfig());
        break;
      }
      case DetType::kEventHeader: {
        AddBranch(branch->GetDataRaw<EventHeader*>(), branch->GetConfig());
        break;
      }
      case DetType::kGeneric: {
        AddBranch(branch->GetDataRaw<GenericDetector*>(), branch->GetConfig());
        break;
      }
    }
  }

  void AddMatching(const std::string& br1, const std::string& br2, Matching*& match) {
    assert(!br1.empty() && !br2.empty() && !match);
    if (out_tree_ == nullptr) {
      throw std::runtime_error("No output tree. Probably, TaskManager::Init() was not called or output file/tree names are not set.");
    }
 
    match = new Matching(configuration_->GetBranchConfig(br1).GetId(),
                         configuration_->GetBranchConfig(br2).GetId());
 
    configuration_->AddMatch(match);
    out_tree_->Branch((configuration_->GetMatchName(br1, br2) + ".").c_str(), &match);
  }
 
  ANALYSISTREE_ATTR_NODISCARD const Configuration* GetConfig() const { return chain_->GetConfiguration(); }
  ANALYSISTREE_ATTR_NODISCARD const DataHeader* GetDataHeader() const { return chain_->GetDataHeader(); }
  ANALYSISTREE_ATTR_NODISCARD Chain* GetChain() const { return chain_; }
 
  ANALYSISTREE_ATTR_NODISCARD const Configuration* GetOutConfig() const { return configuration_; }
  ANALYSISTREE_ATTR_NODISCARD const DataHeader* GetOutDataHeader() const { return data_header_; }
 
  void SetOutputDataHeader(DataHeader* dh) {
    data_header_ = dh;
    chain_->SetDataHeader(dh);// TODO
  }
  void FillOutput() { out_tree_->Fill(); }
 
  void Exec();
 
  std::vector<Task*>& Tasks() { return tasks_; }
 
  void SetOutputName(std::string file, std::string tree = "aTree") {
    out_file_name_ = std::move(file);
    out_tree_name_ = std::move(tree);
    fill_out_tree_ = true;
  }
 
  void SetWriteMode(eBranchWriteMode mode) { write_mode_ = mode; }
  void SetBranchesExclude(std::vector<std::string> brex) { branches_exclude_ = std::move(brex); }
  void SetVerbosityPeriod(int value) { verbosity_period_ = value; }
  void SetIsWriteHashInfo(bool is = true) { is_write_hash_info_ = is; }
  void SetIsUpdateEntryInExec(bool is = true) { is_update_entry_in_exec_ = is; }
 
  void ClearTasks() { tasks_.clear(); }
 
 protected:
  TaskManager() = default;
  static TaskManager* manager_;
 
  void InitOutChain();
  void InitTasks();
  static void WriteCommitInfo();
  static void PrintCommitInfo();
 
  // input data members
  Chain* chain_{nullptr};
  std::vector<Task*> tasks_{};
 
  // output data members
  TFile* out_file_{nullptr};
  TTree* out_tree_{nullptr};
  Configuration* configuration_{nullptr};
  DataHeader* data_header_{nullptr};     
  std::string out_tree_name_{"aTree"};
  std::string out_file_name_{"analysis_tree.root"};
  std::vector<std::string> branches_exclude_{};
 
  int verbosity_period_{-1};
 
  // configuration parameters
  eBranchWriteMode write_mode_{eBranchWriteMode::kCreateNewTree};
  bool is_init_{false};
  bool fill_out_tree_{false};
  bool is_update_entry_in_exec_{true};
  bool read_in_tree_{false};
  bool is_owns_tasks_{true};
  bool is_write_hash_info_{true};
 
  ClassDef(TaskManager, 0);
};
 
};// namespace AnalysisTree
 
#endif//ANALYSISTREE_INFRA_TASKMANANGERNEW_HPP_