FetchDataFromFile.cpp

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#include "GaudiAlg/GaudiAlgorithm.h"

namespace Gaudi {
  namespace Hive {
    class FetchDataFromFile final: public GaudiAlgorithm {
    public:
      using GaudiAlgorithm::GaudiAlgorithm;
      StatusCode initialize() override {
        StatusCode sc = GaudiAlgorithm::initialize();
        if (sc) {
          // this is a hack to reuse the automatic dependencies declaration
          for (auto k: m_dataKeys) {
            addDependency(k, Gaudi::DataHandle::Writer);
          }
        }
        return sc;
      }
      StatusCode start() override {
        StatusCode sc = GaudiAlgorithm::start();
        if ( sc ) {
          for( const auto& k: outputDataObjs() ) {
            if ( UNLIKELY( msgLevel( MSG::DEBUG ) ) )
              debug() << "adding data key " << k << endmsg;
            evtSvc()->addPreLoadItem( k.key() );
          }
        }
        return sc;
      }
      StatusCode execute() override {
        return evtSvc()->preLoad();
      }
    private:
      Gaudi::Property<std::vector<std::string>> m_dataKeys{ this, "DataKeys", {},
        "list of objects to be read from file" };
    };
  }
}
using Gaudi::Hive::FetchDataFromFile;
DECLARE_COMPONENT( FetchDataFromFile )