TFragmentChainLoop.h

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#ifndef TFRAGMENTCHAINLOOP_H
#define TFRAGMENTCHAINLOOP_H
 
/** \addtogroup Loops
 *  @{
 */
 
////////////////////////////////////////////////////////////////////////////////
///
/// \class TFragmentChainLoop
///
/// This loop reads fragments from a root-file with a FragmentTree.
///
////////////////////////////////////////////////////////////////////////////////
 
#ifndef __CINT__
#include <memory>
#endif
 
#include <map>
 
#include "TChain.h"
#include "TClass.h"
 
#include "StoppableThread.h"
#include "ThreadsafeQueue.h"
#include "TFragment.h"
 
class TFragmentChainLoop : public StoppableThread {
public:
   static TFragmentChainLoop* Get(std::string name = "", TChain* chain = nullptr);
   TFragmentChainLoop(const TFragmentChainLoop&)                = delete;
   TFragmentChainLoop(TFragmentChainLoop&&) noexcept            = delete;
   TFragmentChainLoop& operator=(const TFragmentChainLoop&)     = delete;
   TFragmentChainLoop& operator=(TFragmentChainLoop&&) noexcept = delete;
   ~TFragmentChainLoop();
 
#ifndef __CINT__
   std::shared_ptr<ThreadsafeQueue<std::shared_ptr<const TFragment>>>& AddOutputQueue()
   {
      fOutputQueues.push_back(std::make_shared<ThreadsafeQueue<std::shared_ptr<const TFragment>>>());
      return fOutputQueues.back();
   }
#endif
 
   size_t GetItemsPushed() override { return ItemsPopped(); }
   size_t GetItemsPopped() override { return ItemsPopped(); }
   size_t GetItemsCurrent() override { return fEntriesTotal; }
   size_t GetRate() override { return 0; }
 
   void ClearQueue() override;
 
   void OnEnd() override;
 
   void SetSelfStopping(bool self_stopping) { fSelfStopping = self_stopping; }
   bool GetSelfStopping() const { return fSelfStopping; }
   void Restart();
 
protected:
   bool Iteration() override;
 
private:
   TFragmentChainLoop(std::string name, TChain* chain);
 
   int64_t fEntriesTotal;
 
   TChain* fInputChain;
#ifndef __CINT__
   TFragment*                                                                      fFragment;
   std::vector<std::shared_ptr<ThreadsafeQueue<std::shared_ptr<const TFragment>>>> fOutputQueues;
#endif
 
   bool fSelfStopping;
 
   int                            SetupChain();
   std::map<TClass*, TDetector**> fDetMap;
};
 
/*! @} */
#endif /* _TWRITELOOP_H_ */