DataFlowManager.cpp

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#include "DataFlowManager.h"

//---------------------------------------------------------------------------
// Static members
std::vector< DataFlowManager::dependency_bitset > DataFlowManager::m_algosRequirements;
std::unordered_map<std::string,long int> DataFlowManager::m_productName_index_map;
std::vector<std::string> DataFlowManager::m_productName_vec;
//---------------------------------------------------------------------------
DataFlowManager::DataFlowManager(algosDependenciesCollection algosDependencies){

  // Count how many products are actually requested
  unsigned int nProducts(0);
  for (auto& thisAlgoDependencies : algosDependencies){
    nProducts += thisAlgoDependencies.size(); 
  }
  m_dataObjectsCatalog.resize(nProducts);

  // If it's not the first instance, nothing to do here
  if (m_algosRequirements.size()==0){      
    // This is the first instance, compile the requirements
    m_algosRequirements.resize(algosDependencies.size(),dependency_bitset(nProducts));

    // Fill the requirements
    unsigned int algoIndex=0;    
    long int productIndex=0;
    for (auto& thisAlgoDependencies : algosDependencies){      
      // Make a local alias for better readability
      auto& dependency_bits = m_algosRequirements[algoIndex];    
      for (auto& product : thisAlgoDependencies){
        auto ret_val = m_productName_index_map.insert(std::pair<std::string, long int>(product,productIndex));
        // insert successful means product wasn't known before. So increment counter
        if (ret_val.second==true) ++productIndex;
        // in any case the return value holds the proper product index
        dependency_bits[ret_val.first->second] = true;                  
      }// end loop on products on which the algo depends
      algoIndex++;
    }// end loop on algorithms
  
  // Now the vector of products    
  m_productName_vec.resize(m_productName_index_map.size());
  for (auto& name_idx : m_productName_index_map)
    m_productName_vec[name_idx.second]=name_idx.first;    
  }

}

//---------------------------------------------------------------------------

bool DataFlowManager::canAlgorithmRun(unsigned int iAlgo){
  const dependency_bitset& thisAlgoRequirements = m_algosRequirements[iAlgo];
  return thisAlgoRequirements.is_subset_of(m_dataObjectsCatalog);
}

//---------------------------------------------------------------------------

void DataFlowManager::updateDataObjectsCatalog(const std::vector<std::string>& newProducts){
  for (const auto& new_product : newProducts){
    const int index = productName2index(new_product);
    if (index>=0)
      m_dataObjectsCatalog[index]=true;
  }
  
}

//---------------------------------------------------------------------------

void DataFlowManager::reset(){
  m_dataObjectsCatalog.reset();
}

//---------------------------------------------------------------------------

std::vector<std::string> DataFlowManager::content() const{  
  // with move semantics this is ~fine
  std::vector<std::string> products;
  for (unsigned int i=0;i<m_dataObjectsCatalog.size();++i){
    if (m_dataObjectsCatalog[i])
      products.push_back(m_productName_vec[i]);
  }
  return products;
}

//---------------------------------------------------------------------------
std::vector<std::string> DataFlowManager::dataDependencies(unsigned int iAlgo) const{
  // with move semantics this is ~fine
  std::vector<std::string> deps;
  for (unsigned int i=0;i<m_productName_vec.size();++i){
    if (m_algosRequirements[iAlgo][i])
      deps.push_back(m_productName_vec[i]);
  }
  return deps;
}

//---------------------------------------------------------------------------