secondo/Algebras/Distributed/DServerShuffleReceiver.cpp

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[1] Class DServerShuffleReceiver Implementation

\begin{center}
April 2012 Thomas Achmann
\end{center}

[TOC]

0 Description

Implementation of the class ~DServerShuffleReceiver~

1 Preliminaries

1.1 Includes

*/
#include "DServerShuffleReceiver.h"
#include "DServerCmdCallBackComm.h"
#include "Algebras/Relation-C++/RelationAlgebra.h"
#include "DBAccessGuard.h"

/*
1.2 Debug Output

uncomment the following line for debug output

*/
//#define SHUFFLE_RECEIVE_DEBUG 1

/*
2 Implementation

2.1 Method ~void run~

run method of the thread

*/

void  DServerShuffleReceiver::run()
{
#ifdef SHUFFLE_RECEIVE_DEBUG
  string recType;
  DBAccessGuard::getInstance() -> NL_ToString(m_recType, recType);
  cout << "Starting Receiver: " <<  m_runit
       << " for " << m_destHost << ":" << m_toPort 
       << " TT:" << recType << endl;

  int dbg_count = 0;
#endif
  DServerCmdCallBackCommunication *dscCallBack = 
    new DServerCmdCallBackCommunication(m_destHost, m_toPort
#ifdef SHUFFLE_RECEIVE_DEBUG
                                        , "RECEIVER RUN "
#endif
                                        );

  if (dscCallBack -> createGlobalSocket())
    {
      bool noError = true;

      TupleType *tt = DBAccess::getInstance() -> TT_New(m_recType);

      ReceiveRelContainer recContainer(m_rel);

      while(m_runit)
        {
          m_runit = 
            dscCallBack -> 
               getTagFromCallBackTF("SENDTUPLE", "NOTUPLE", noError);

          if (m_runit)
            {
              dscCallBack -> readTupleFromCallBack(tt, &recContainer);
#ifdef SHUFFLE_RECEIVE_DEBUG 
              cout << "Rec:" << m_destHost << ":" << m_toPort 
                   << " - " << dbg_count << endl;
              dbg_count ++;
#endif
            }
          else
            {
              m_runit = false;
            }
           
          if (noError)
            {
              m_runit = 
                dscCallBack -> 
                   getTagFromCallBackTF("NEXT", "END", noError);

              if (!noError)
                {
                  m_runit = false;
                }
            }
          else
            {
              m_runit = false;
            }
        } // while
    
      DBAccess::getInstance() -> TT_DeleteIfAllowed(tt);
      dscCallBack -> sendTagToCallBack("CLOSE");

    } // dsc

  delete dscCallBack;

#ifdef SHUFFLE_RECEIVE_DEBUG
  cout << "RECEIVER IS DONE from " << m_toPort << "@" << m_destHost << endl;
#endif
}