source: XIOS/dev/dev_olga/src/node/context.cpp @ 1184

#include "context.hpp"
#include "attribute_template.hpp"
#include "object_template.hpp"
#include "group_template.hpp"

#include "calendar_type.hpp"
#include "duration.hpp"

#include "context_client.hpp"
#include "context_server.hpp"
#include "nc4_data_output.hpp"
#include "node_type.hpp"
#include "message.hpp"
#include "type.hpp"
#include "xios_spl.hpp"
#include "timer.hpp"
#include "memtrack.hpp"

#include "server.hpp"

namespace xios {

  shared_ptr<CContextGroup> CContext::root;

   /// ////////////////////// Définitions ////////////////////// ///

   CContext::CContext(void)
      : CObjectTemplate<CContext>(), CContextAttributes()
      , calendar(), hasClient(false), hasServer(false)
      , isPostProcessed(false), finalized(false)
      , idServer_(), client(0), server(0)
      , allProcessed(false), countChildCtx_(0)
   { /* Ne rien faire de plus */ }

   CContext::CContext(const StdString & id)
      : CObjectTemplate<CContext>(id), CContextAttributes()
      , calendar(), hasClient(false), hasServer(false)
      , isPostProcessed(false), finalized(false)
      , idServer_(), client(0), server(0)
      , allProcessed(false), countChildCtx_(0)
   { /* Ne rien faire de plus */ }

   CContext::~CContext(void)
   {
     delete client;
     delete server;
     for (std::vector<CContextClient*>::iterator it = clientPrimServer.begin(); it != clientPrimServer.end(); it++)  delete *it;
     for (std::vector<CContextServer*>::iterator it = serverPrimServer.begin(); it != serverPrimServer.end(); it++)  delete *it;

   }

   //----------------------------------------------------------------
   //! Get name of context
   StdString CContext::GetName(void)   { return (StdString("context")); }
   StdString CContext::GetDefName(void){ return (CContext::GetName()); }
   ENodeType CContext::GetType(void)   { return (eContext); }

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

   /*!
   \brief Get context group (context root)
   \return Context root
   */
   CContextGroup* CContext::getRoot(void)
   {
      if (root.get()==NULL) root=shared_ptr<CContextGroup>(new CContextGroup(xml::CXMLNode::GetRootName()));
      return root.get();
   }

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

   /*!
   \brief Get calendar of a context
   \return Calendar
   */
   boost::shared_ptr<CCalendar> CContext::getCalendar(void) const
   {
      return (this->calendar);
   }

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

   /*!
   \brief Set a context with a calendar
   \param[in] newCalendar new calendar
   */
   void CContext::setCalendar(boost::shared_ptr<CCalendar> newCalendar)
   {
      this->calendar = newCalendar;
   }

   //----------------------------------------------------------------
   /*!
   \brief Parse xml file and write information into context object
   \param [in] node xmld node corresponding in xml file
   */
   void CContext::parse(xml::CXMLNode & node)
   {
      CContext::SuperClass::parse(node);

      // PARSING POUR GESTION DES ENFANTS
      xml::THashAttributes attributes = node.getAttributes();

      if (attributes.end() != attributes.find("src"))
      {
         StdIFStream ifs ( attributes["src"].c_str() , StdIFStream::in );
         if ( (ifs.rdstate() & std::ifstream::failbit ) != 0 )
            ERROR("void CContext::parse(xml::CXMLNode & node)",
                  <<endl<< "Can not open <"<<attributes["src"].c_str()<<"> file" );
         if (!ifs.good())
            ERROR("CContext::parse(xml::CXMLNode & node)",
                  << "[ filename = " << attributes["src"] << " ] Bad xml stream !");
         xml::CXMLParser::ParseInclude(ifs, attributes["src"], *this);
      }

      if (node.getElementName().compare(CContext::GetName()))
         DEBUG("Le noeud is wrong defined but will be considered as a context !");

      if (!(node.goToChildElement()))
      {
         DEBUG("Le context ne contient pas d'enfant !");
      }
      else
      {
         do { // Parcours des contextes pour traitement.

            StdString name = node.getElementName();
            attributes.clear();
            attributes = node.getAttributes();

            if (attributes.end() != attributes.find("id"))
            {
              DEBUG(<< "Definition node has an id,"
                    << "it will not be taking account !");
            }

#define DECLARE_NODE(Name_, name_)    \
   if (name.compare(C##Name_##Definition::GetDefName()) == 0) \
   { C##Name_##Definition::create(C##Name_##Definition::GetDefName()) -> parse(node); continue; }
#define DECLARE_NODE_PAR(Name_, name_)
#include "node_type.conf"

            DEBUG(<< "The element \'"     << name
                  << "\' in the context \'" << CContext::getCurrent()->getId()
                  << "\' is not a definition !");

         } while (node.goToNextElement());

         node.goToParentElement(); // Retour au parent
      }
   }

   //----------------------------------------------------------------
   //! Show tree structure of context
   void CContext::ShowTree(StdOStream & out)
   {
      StdString currentContextId = CContext::getCurrent() -> getId();
      std::vector<CContext*> def_vector =
         CContext::getRoot()->getChildList();
      std::vector<CContext*>::iterator
         it = def_vector.begin(), end = def_vector.end();

      out << "<? xml version=\"1.0\" ?>" << std::endl;
      out << "<"  << xml::CXMLNode::GetRootName() << " >" << std::endl;

      for (; it != end; it++)
      {
         CContext* context = *it;
         CContext::setCurrent(context->getId());
         out << *context << std::endl;
      }

      out << "</" << xml::CXMLNode::GetRootName() << " >" << std::endl;
      CContext::setCurrent(currentContextId);
   }


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

   //! Convert context object into string (to print)
   StdString CContext::toString(void) const
   {
      StdOStringStream oss;
      oss << "<" << CContext::GetName()
          << " id=\"" << this->getId() << "\" "
          << SuperClassAttribute::toString() << ">" << std::endl;
      if (!this->hasChild())
      {
         //oss << "<!-- No definition -->" << std::endl; // fait planter l'incrémentation
      }
      else
      {

#define DECLARE_NODE(Name_, name_)    \
   if (C##Name_##Definition::has(C##Name_##Definition::GetDefName())) \
   oss << * C##Name_##Definition::get(C##Name_##Definition::GetDefName()) << std::endl;
#define DECLARE_NODE_PAR(Name_, name_)
#include "node_type.conf"

      }

      oss << "</" << CContext::GetName() << " >";

      return (oss.str());
   }

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

   /*!
   \brief Find all inheritace among objects in a context.
   \param [in] apply (true) write attributes of parent into ones of child if they are empty
                     (false) write attributes of parent into a new container of child
   \param [in] parent unused
   */
   void CContext::solveDescInheritance(bool apply, const CAttributeMap * const UNUSED(parent))
   {
#define DECLARE_NODE(Name_, name_)    \
   if (C##Name_##Definition::has(C##Name_##Definition::GetDefName())) \
     C##Name_##Definition::get(C##Name_##Definition::GetDefName())->solveDescInheritance(apply);
#define DECLARE_NODE_PAR(Name_, name_)
#include "node_type.conf"
   }

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

   //! Verify if all root definition in the context have child.
   bool CContext::hasChild(void) const
   {
      return (
#define DECLARE_NODE(Name_, name_)    \
   C##Name_##Definition::has(C##Name_##Definition::GetDefName())   ||
#define DECLARE_NODE_PAR(Name_, name_)
#include "node_type.conf"
      false);
}

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

   void CContext::CleanTree(void)
   {
#define DECLARE_NODE(Name_, name_) C##Name_##Definition::ClearAllAttributes();
#define DECLARE_NODE_PAR(Name_, name_)
#include "node_type.conf"
   }
   ///---------------------------------------------------------------

   //! Initialize client side
   void CContext::initClient(MPI_Comm intraComm, MPI_Comm interComm, CContext* cxtServer /*= 0*/)
   {

     hasClient = true;
     MPI_Comm intraCommServer, interCommServer;

     if (CServer::serverLevel != 1)
      // initClient is called by client
     {
       client = new CContextClient(this, intraComm, interComm, cxtServer);
       if (cxtServer) // Attached mode
       {
         intraCommServer = intraComm;
         interCommServer = interComm;
       }
       else
       {
         MPI_Comm_dup(intraComm, &intraCommServer);
         comms.push_back(intraCommServer);
         MPI_Comm_dup(interComm, &interCommServer);
         comms.push_back(interCommServer);
       }
       registryIn=new CRegistry(intraComm);
       registryIn->setPath(getId()) ;
       if (client->clientRank==0) registryIn->fromFile("xios_registry.bin") ;
       registryIn->bcastRegistry() ;
       registryOut=new CRegistry(intraComm) ;
       registryOut->setPath(getId()) ;

       server = new CContextServer(this, intraCommServer, interCommServer);
     }
     else
     // initClient is called by primary server
     {
       clientPrimServer.push_back(new CContextClient(this, intraComm, interComm));
       MPI_Comm_dup(intraComm, &intraCommServer);
       comms.push_back(intraCommServer);
       MPI_Comm_dup(interComm, &interCommServer);
       comms.push_back(interCommServer);
       serverPrimServer.push_back(new CContextServer(this, intraCommServer, interCommServer));
     }
   }

   void CContext::setClientServerBuffer(CContextClient* contextClient)
   {
     size_t minBufferSize = CXios::minBufferSize;
#define DECLARE_NODE(Name_, name_)    \
     if (minBufferSize < sizeof(C##Name_##Definition)) minBufferSize = sizeof(C##Name_##Definition);
#define DECLARE_NODE_PAR(Name_, name_)
#include "node_type.conf"
#undef DECLARE_NODE
#undef DECLARE_NODE_PAR

     std::map<int, StdSize> maxEventSize;
     std::map<int, StdSize> bufferSize = getAttributesBufferSize(maxEventSize, contextClient);
     std::map<int, StdSize> dataBufferSize = getDataBufferSize(maxEventSize, contextClient);

     std::map<int, StdSize>::iterator it, ite = dataBufferSize.end();
     for (it = dataBufferSize.begin(); it != ite; ++it)
       if (it->second > bufferSize[it->first]) bufferSize[it->first] = it->second;

     ite = bufferSize.end();
     for (it = bufferSize.begin(); it != ite; ++it)
     {
       it->second *= CXios::bufferSizeFactor;
       if (it->second < minBufferSize) it->second = minBufferSize;
     }

     // We consider that the minimum buffer size is also the minimum event size
     ite = maxEventSize.end();
     for (it = maxEventSize.begin(); it != ite; ++it)
       if (it->second < minBufferSize) it->second = minBufferSize;

     if (contextClient->isServerLeader())
     {
       const std::list<int>& ranks = contextClient->getRanksServerLeader();
       for (std::list<int>::const_iterator itRank = ranks.begin(), itRankEnd = ranks.end(); itRank != itRankEnd; ++itRank)
         if (!bufferSize.count(*itRank)) bufferSize[*itRank] = maxEventSize[*itRank] = minBufferSize;
     }
     contextClient->setBufferSize(bufferSize, maxEventSize);

   }

   //! Verify whether a context is initialized
   bool CContext::isInitialized(void)
   {
     return hasClient;
   }

   void CContext::initServer(MPI_Comm intraComm, MPI_Comm interComm, CContext* cxtClient /*= 0*/)
   {
     hasServer=true;
     server = new CContextServer(this,intraComm,interComm);

     registryIn=new CRegistry(intraComm);
     registryIn->setPath(getId()) ;
     if (server->intraCommRank==0) registryIn->fromFile("xios_registry.bin") ;
     registryIn->bcastRegistry() ;
     registryOut=new CRegistry(intraComm) ;
     registryOut->setPath(getId()) ;

     MPI_Comm intraCommClient, interCommClient;
     if (cxtClient) // Attached mode
     {
       intraCommClient = intraComm;
       interCommClient = interComm;
     }
     else
     {
       MPI_Comm_dup(intraComm, &intraCommClient);
       comms.push_back(intraCommClient);
       MPI_Comm_dup(interComm, &interCommClient);
       comms.push_back(interCommClient);
     }
     client = new CContextClient(this,intraCommClient,interCommClient, cxtClient);
   }

   //! Try to send the buffers and receive possible answers
  bool CContext::checkBuffersAndListen(void)
  {
    bool clientReady, serverFinished;

    // Only classical servers are non-blocking
    if (CServer::serverLevel == 0)
    {
      client->checkBuffers();
      bool hasTmpBufferedEvent = client->hasTemporarilyBufferedEvent();
      if (hasTmpBufferedEvent)
        hasTmpBufferedEvent = !client->sendTemporarilyBufferedEvent();
      // Don't process events if there is a temporarily buffered event
      return server->eventLoop(!hasTmpBufferedEvent);
    }
    else if (CServer::serverLevel == 1)
    {
      if (!finalized)
        client->checkBuffers();
      bool serverFinished = true;
      if (!finalized)
        serverFinished = server->eventLoop();
      bool serverPrimFinished = true;
      for (int i = 0; i < clientPrimServer.size(); ++i)
      {
        if (!finalized)
          clientPrimServer[i]->checkBuffers();
        if (!finalized)
          serverPrimFinished *= serverPrimServer[i]->eventLoop();
      }
      return ( serverFinished && serverPrimFinished);
    }

    else if (CServer::serverLevel == 2)
    {
      client->checkBuffers();
      return server->eventLoop();
    }
  }

   //! Terminate a context
   void CContext::finalize(void)
   {
     // Send registry upon calling the function the first time
     if (countChildCtx_ == 0)
       if (hasClient) sendRegistry() ;

     // Client:
     // (1) blocking send context finalize to its server
     // (2) blocking receive context finalize from its server
     // (3) send post finalize to its server
     if (CXios::isClient)
     {
       // Make sure that client (model) enters the loop only once
       if (countChildCtx_ < 1)
       {
         ++countChildCtx_;

         client->finalize();
         while (client->havePendingRequests())
            client->checkBuffers();

         while (!server->hasFinished())
           server->eventLoop();

         if (CXios::isServer) // Mode attache
           postFinalize();
         else                  // Mode server
           client->postFinalize();

       }
     }
     // Server: non-blocking send context finalize
     else if (CXios::isServer)
     {
       // First context finalize message received from a model => send context finalize to its child contexts (if any)
       if (countChildCtx_ == 0)
         for (int i = 0; i < clientPrimServer.size(); ++i)
           clientPrimServer[i]->finalize();

       // (Last) context finalized message received
       // Close files, gather registries, send context finalize to its parent context
       if (countChildCtx_ == clientPrimServer.size())
         client->finalize();

       ++countChildCtx_;
     }
   }

   /*!
   * \fn void CContext::postFinalize(void)
   * Close files, gather registries, and make deallocations.
   * Function is called when a context is finalized (it has nothing to receive and nothing to send).
   */
   void CContext::postFinalize(void)
   {
     finalized = true;

     // Primary server: blocking send post finalize to secondary servers
     for (int i = 0; i < clientPrimServer.size(); ++i)
       clientPrimServer[i]->postFinalize();
     bool buffersReleased;
     do
     {
       buffersReleased = true;
       for (int i = 0; i < clientPrimServer.size(); ++i)
       {
         clientPrimServer[i]->checkBuffers();
         buffersReleased *= !clientPrimServer[i]->havePendingRequests();
       }
     } while (!buffersReleased);

     info(20)<<"Context <"<<getId()<<"> is finalized."<<endl;

     if (hasServer && !hasClient)
     {
       closeAllFile();
       registryOut->hierarchicalGatherRegistry() ;
       if (server->intraCommRank==0) CXios::globalRegistry->mergeRegistry(*registryOut) ;
     }

     //! Deallocate client buffers
     client->releaseBuffers();
     for (int i = 0; i < clientPrimServer.size(); ++i)
       clientPrimServer[i]->releaseBuffers();

     //! Free internally allocated communicators
     for (std::list<MPI_Comm>::iterator it = comms.begin(); it != comms.end(); ++it)
       MPI_Comm_free(&(*it));
     comms.clear();

   }

   //! Free internally allocated communicators
   void CContext::freeComms(void)
   {
     for (std::list<MPI_Comm>::iterator it = comms.begin(); it != comms.end(); ++it)
       MPI_Comm_free(&(*it));
     comms.clear();
   }

   //! Deallocate buffers allocated by clientContexts
   void CContext::releaseClientBuffers(void)
   {
     client->releaseBuffers();
     for (int i = 0; i < clientPrimServer.size(); ++i)
       clientPrimServer[i]->releaseBuffers();
   }

   void CContext::postProcessingGlobalAttributes()
   {
     if (allProcessed) return;  
     
     // After xml is parsed, there are some more works with post processing
     postProcessing();

     // Check grid and calculate its distribution
     checkGridEnabledFields();    

     setClientServerBuffer(client);
     if (hasServer)
       for (int i = 0; i < clientPrimServer.size(); ++i)
         setClientServerBuffer(clientPrimServer[i]);


     if (hasClient)
     {
      // Send all attributes of current context to server
      this->sendAllAttributesToServer();

      // Send all attributes of current calendar
      CCalendarWrapper::get(CCalendarWrapper::GetDefName())->sendAllAttributesToServer();

      // We have enough information to send to server
      // First of all, send all enabled files
      sendEnabledFiles();

      // Then, send all enabled fields
      sendEnabledFields();

      // At last, we have all info of domain and axis, then send them
       sendRefDomainsAxis();

       // After that, send all grid (if any)
       sendRefGrid();

       // We have a xml tree on the server side and now, it should be also processed
       sendPostProcessing();

       sendGridEnabledFields();       
     }
     allProcessed = true;
   }

   void CContext::sendPostProcessingGlobalAttributes()
   {
      // Use correct context client to send message
     // int nbSrvPools = (hasServer) ? clientPrimServer.size() : 1;
    int nbSrvPools = (this->hasServer) ? (this->hasClient ? this->clientPrimServer.size() : 0) : 1;
     for (int i = 0; i < nbSrvPools; ++i)
     {
       CContextClient* contextClientTmp = (0 != clientPrimServer.size()) ? clientPrimServer[i] : client;
       CEventClient event(getType(),EVENT_ID_POST_PROCESS_GLOBAL_ATTRIBUTES);

       if (contextClientTmp->isServerLeader())
       {
         CMessage msg;
         if (hasServer)
           msg<<this->getIdServer(i);
         else
           msg<<this->getIdServer();
         const std::list<int>& ranks = contextClientTmp->getRanksServerLeader();
         for (std::list<int>::const_iterator itRank = ranks.begin(), itRankEnd = ranks.end(); itRank != itRankEnd; ++itRank)
           event.push(*itRank,1,msg);
         contextClientTmp->sendEvent(event);
       }
       else contextClientTmp->sendEvent(event);
     }
   }

   void CContext::recvPostProcessingGlobalAttributes(CEventServer& event)
   {
      CBufferIn* buffer=event.subEvents.begin()->buffer;
      string id;
      *buffer>>id;
      get(id)->recvPostProcessingGlobalAttributes(*buffer);
   }

   void CContext::recvPostProcessingGlobalAttributes(CBufferIn& buffer)
   {      
      postProcessingGlobalAttributes();
   }

   /*!
   \brief Close all the context defintion and do processing data
      After everything is well defined on client side, they will be processed and sent to server
   From the version 2.0, sever and client work no more on the same database. Moreover, client(s) will send
   all necessary information to server, from which each server can build its own database.
   Because the role of server is to write out field data on a specific netcdf file,
   the only information that it needs is the enabled files
   and the active fields (fields will be written onto active files)
   */
   void CContext::closeDefinition(void)
   {
    CTimer::get("Context : close definition").resume() ;
    postProcessingGlobalAttributes();

    if (hasClient) sendPostProcessingGlobalAttributes();

    // There are some processings that should be done after all of above. For example: check mask or index
    this->buildFilterGraphOfEnabledFields();
    
     if (hasClient && !hasServer)
    {
      buildFilterGraphOfFieldsWithReadAccess();
    }
    
    checkGridEnabledFields();    

    if (hasClient) this->sendProcessingGridOfEnabledFields();
    if (hasClient) this->sendCloseDefinition();

    // Nettoyage de l'arborescence
    if (hasClient) CleanTree(); // Only on client side??

    if (hasClient)
    {
      sendCreateFileHeader();
      if (!hasServer) startPrefetchingOfEnabledReadModeFiles();
    }
    CTimer::get("Context : close definition").suspend() ;
   }

   void CContext::findAllEnabledFields(void)
   {
     for (unsigned int i = 0; i < this->enabledFiles.size(); i++)
     (void)this->enabledFiles[i]->getEnabledFields();
   }

   void CContext::findAllEnabledFieldsInReadModeFiles(void)
   {
     for (unsigned int i = 0; i < this->enabledReadModeFiles.size(); ++i)
     (void)this->enabledReadModeFiles[i]->getEnabledFields();
   }

   void CContext::readAttributesOfEnabledFieldsInReadModeFiles()
   {
      for (unsigned int i = 0; i < this->enabledReadModeFiles.size(); ++i)
        (void)this->enabledReadModeFiles[i]->readAttributesOfEnabledFieldsInReadMode();
   }

   void CContext::sendGridEnabledFields()
   {
     int size = this->enabledFiles.size();
     for (int i = 0; i < size; ++i)
     {       
       this->enabledFiles[i]->sendGridOfEnabledFields();
     }
   }

   void CContext::checkGridEnabledFields()
   {
     int size = this->enabledFiles.size();
     for (int i = 0; i < size; ++i)
     {
       this->enabledFiles[i]->checkGridOfEnabledFields();       
     }
   }

   void CContext::solveOnlyRefOfEnabledFields(bool sendToServer)
   {
     int size = this->enabledFiles.size();
     for (int i = 0; i < size; ++i)
     {
       this->enabledFiles[i]->solveOnlyRefOfEnabledFields(sendToServer);
     }

     for (int i = 0; i < size; ++i)
     {
       this->enabledFiles[i]->generateNewTransformationGridDest();
     }
   }

   void CContext::solveAllRefOfEnabledFieldsAndTransform(bool sendToServer)
   {
     int size = this->enabledFiles.size();
     for (int i = 0; i < size; ++i)
     {
       this->enabledFiles[i]->solveAllRefOfEnabledFieldsAndTransform(sendToServer);
     }
   }

   void CContext::buildFilterGraphOfEnabledFields()
   {
     int size = this->enabledFiles.size();
     for (int i = 0; i < size; ++i)
     {
       this->enabledFiles[i]->buildFilterGraphOfEnabledFields(garbageCollector);
     }
   }

   void CContext::startPrefetchingOfEnabledReadModeFiles()
   {
     int size = enabledReadModeFiles.size();
     for (int i = 0; i < size; ++i)
     {
        enabledReadModeFiles[i]->prefetchEnabledReadModeFields();
     }
   }

   void CContext::checkPrefetchingOfEnabledReadModeFiles()
   {
     int size = enabledReadModeFiles.size();
     for (int i = 0; i < size; ++i)
     {
        enabledReadModeFiles[i]->prefetchEnabledReadModeFieldsIfNeeded();
     }
   }

  void CContext::findFieldsWithReadAccess(void)
  {
    fieldsWithReadAccess.clear();
    const vector<CField*> allFields = CField::getAll();
    for (size_t i = 0; i < allFields.size(); ++i)
    {
      CField* field = allFields[i];

      if (field->file && !field->file->mode.isEmpty() && field->file->mode == CFile::mode_attr::read)
        field->read_access = true;
      else if (!field->read_access.isEmpty() && field->read_access && (field->enabled.isEmpty() || field->enabled))
        fieldsWithReadAccess.push_back(field);
    }
  }

  void CContext::solveAllRefOfFieldsWithReadAccess()
  {
    for (size_t i = 0; i < fieldsWithReadAccess.size(); ++i)
      fieldsWithReadAccess[i]->solveAllReferenceEnabledField(false);
  }

  void CContext::buildFilterGraphOfFieldsWithReadAccess()
  {
    for (size_t i = 0; i < fieldsWithReadAccess.size(); ++i)
      fieldsWithReadAccess[i]->buildFilterGraph(garbageCollector, true);
  }

   void CContext::solveAllInheritance(bool apply)
   {
     // Résolution des héritages descendants (cà d des héritages de groupes)
     // pour chacun des contextes.
      solveDescInheritance(apply);

     // Résolution des héritages par référence au niveau des fichiers.
      const vector<CFile*> allFiles=CFile::getAll();
      const vector<CGrid*> allGrids= CGrid::getAll();

      if (hasClient && !hasServer)
      //if (hasClient)
      {
        for (unsigned int i = 0; i < allFiles.size(); i++)
          allFiles[i]->solveFieldRefInheritance(apply);
      }

      unsigned int vecSize = allGrids.size();
      unsigned int i = 0;
      for (i = 0; i < vecSize; ++i)
        allGrids[i]->solveDomainAxisRefInheritance(apply);

   }

   void CContext::findEnabledFiles(void)
   {
      const std::vector<CFile*> allFiles = CFile::getAll();
      const CDate& initDate = calendar->getInitDate();

      for (unsigned int i = 0; i < allFiles.size(); i++)
         if (!allFiles[i]->enabled.isEmpty()) // Si l'attribut 'enabled' est défini.
         {
            if (allFiles[i]->enabled.getValue()) // Si l'attribut 'enabled' est fixé à vrai.
            {
              if ((initDate + allFiles[i]->output_freq.getValue()) < (initDate + this->getCalendar()->getTimeStep()))
              {
                error(0)<<"WARNING: void CContext::findEnabledFiles()"<<endl
                    << "Output frequency in file \""<<allFiles[i]->getFileOutputName()
                    <<"\" is less than the time step. File will not be written."<<endl;
              }
              else
               enabledFiles.push_back(allFiles[i]);
            }
         }
         else
         {
           if ( (initDate + allFiles[i]->output_freq.getValue()) < (initDate + this->getCalendar()->getTimeStep()))
           {
             error(0)<<"WARNING: void CContext::findEnabledFiles()"<<endl
                 << "Output frequency in file \""<<allFiles[i]->getFileOutputName()
                 <<"\" is less than the time step. File will not be written."<<endl;
           }
           else
             enabledFiles.push_back(allFiles[i]); // otherwise true by default
         }

      if (enabledFiles.size() == 0)
         DEBUG(<<"Aucun fichier ne va être sorti dans le contexte nommé \""
               << getId() << "\" !");

      // Assigning contextClient to each enabled file
      if (hasClient)
      {
        for (int i = 0; i < enabledFiles.size(); ++i)
        {
          if (hasServer)
          {
            int srvId = i % clientPrimServer.size();
            enabledFiles[i]->setContextClient(clientPrimServer[srvId]);
          }
          else
            enabledFiles[i]->setContextClient(client);
        }
      }
   }

   void CContext::findEnabledReadModeFiles(void)
   {
     int size = this->enabledFiles.size();
     for (int i = 0; i < size; ++i)
     {
       if (!enabledFiles[i]->mode.isEmpty() && enabledFiles[i]->mode.getValue() == CFile::mode_attr::read)
        enabledReadModeFiles.push_back(enabledFiles[i]);
     }
   }

   void CContext::closeAllFile(void)
   {
     std::vector<CFile*>::const_iterator
            it = this->enabledFiles.begin(), end = this->enabledFiles.end();

     for (; it != end; it++)
     {
       info(30)<<"Closing File : "<<(*it)->getId()<<endl;
       (*it)->close();
     }
   }

   /*!
   \brief Dispatch event received from client
      Whenever a message is received in buffer of server, it will be processed depending on
   its event type. A new event type should be added in the switch list to make sure
   it processed on server side.
   \param [in] event: Received message
   */
   bool CContext::dispatchEvent(CEventServer& event)
   {

      if (SuperClass::dispatchEvent(event)) return true;
      else
      {
        switch(event.type)
        {
           case EVENT_ID_CLOSE_DEFINITION :
             recvCloseDefinition(event);
             return true;
             break;
           case EVENT_ID_UPDATE_CALENDAR:
             recvUpdateCalendar(event);
             return true;
             break;
           case EVENT_ID_CREATE_FILE_HEADER :
             recvCreateFileHeader(event);
             return true;
             break;
           case EVENT_ID_POST_PROCESS:
             recvPostProcessing(event);
             return true;
            case EVENT_ID_SEND_REGISTRY:
             recvRegistry(event);
             return true;
             break;
            case EVENT_ID_POST_PROCESS_GLOBAL_ATTRIBUTES:
             recvPostProcessingGlobalAttributes(event);
             return true;
             break;
            case EVENT_ID_PROCESS_GRID_ENABLED_FIELDS:
             recvProcessingGridOfEnabledFields(event);
             return true;
             break;
           default :
             ERROR("bool CContext::dispatchEvent(CEventServer& event)",
                    <<"Unknown Event");
           return false;
         }
      }
   }

   //! Client side: Send a message to server to make it close
   void CContext::sendCloseDefinition(void)
   {
     // Use correct context client to send message
     int nbSrvPools = (this->hasServer) ? (this->hasClient ? this->clientPrimServer.size() : 0) : 1;
     for (int i = 0; i < nbSrvPools; ++i)
     {
       CContextClient* contextClientTmp = (hasServer) ? clientPrimServer[i] : client;
       CEventClient event(getType(),EVENT_ID_CLOSE_DEFINITION);
       if (contextClientTmp->isServerLeader())
       {
         CMessage msg;
         if (hasServer)
           msg<<this->getIdServer(i);
         else
           msg<<this->getIdServer();
         const std::list<int>& ranks = contextClientTmp->getRanksServerLeader();
         for (std::list<int>::const_iterator itRank = ranks.begin(), itRankEnd = ranks.end(); itRank != itRankEnd; ++itRank)
           event.push(*itRank,1,msg);
         contextClientTmp->sendEvent(event);
       }
       else contextClientTmp->sendEvent(event);
     }
   }

   //! Server side: Receive a message of client announcing a context close
   void CContext::recvCloseDefinition(CEventServer& event)
   {
      CBufferIn* buffer=event.subEvents.begin()->buffer;
      string id;
      *buffer>>id;
      get(id)->closeDefinition();
   }

   //! Client side: Send a message to update calendar in each time step
   void CContext::sendUpdateCalendar(int step)
   {
     // Use correct context client to send message
    int nbSrvPools = (this->hasServer) ? (this->hasClient ? this->clientPrimServer.size() : 0) : 1;
     for (int i = 0; i < nbSrvPools; ++i)
     {
       CContextClient* contextClientTmp = (hasServer) ? clientPrimServer[i] : client;
       CEventClient event(getType(),EVENT_ID_UPDATE_CALENDAR);

         if (contextClientTmp->isServerLeader())
         {
           CMessage msg;
           if (hasServer)
             msg<<this->getIdServer(i)<<step;
           else
             msg<<this->getIdServer()<<step;
           const std::list<int>& ranks = contextClientTmp->getRanksServerLeader();
           for (std::list<int>::const_iterator itRank = ranks.begin(), itRankEnd = ranks.end(); itRank != itRankEnd; ++itRank)
             event.push(*itRank,1,msg);
           contextClientTmp->sendEvent(event);
         }
         else contextClientTmp->sendEvent(event);
     }
   }

   //! Server side: Receive a message of client annoucing calendar update
   void CContext::recvUpdateCalendar(CEventServer& event)
   {
      CBufferIn* buffer=event.subEvents.begin()->buffer;
      string id;
      *buffer>>id;
      get(id)->recvUpdateCalendar(*buffer);
   }

   //! Server side: Receive a message of client annoucing calendar update
   void CContext::recvUpdateCalendar(CBufferIn& buffer)
   {
      int step;
      buffer>>step;
      updateCalendar(step);
      if (hasClient && hasServer)
      {        
        sendUpdateCalendar(step);
      }
   }

   //! Client side: Send a message to create header part of netcdf file
   void CContext::sendCreateFileHeader(void)
   {
     // Use correct context client to send message
     // int nbSrvPools = (hasServer) ? clientPrimServer.size() : 1;
     int nbSrvPools = (this->hasServer) ? (this->hasClient ? this->clientPrimServer.size() : 0) : 1;
     for (int i = 0; i < nbSrvPools; ++i)
     {
       CContextClient* contextClientTmp = (hasServer) ? clientPrimServer[i] : client;
       CEventClient event(getType(),EVENT_ID_CREATE_FILE_HEADER);

       if (contextClientTmp->isServerLeader())
       {
         CMessage msg;
         if (hasServer)
           msg<<this->getIdServer(i);
         else
           msg<<this->getIdServer();
         const std::list<int>& ranks = contextClientTmp->getRanksServerLeader();
         for (std::list<int>::const_iterator itRank = ranks.begin(), itRankEnd = ranks.end(); itRank != itRankEnd; ++itRank)
           event.push(*itRank,1,msg) ;
         contextClientTmp->sendEvent(event);
       }
       else contextClientTmp->sendEvent(event);
     }
   }

   //! Server side: Receive a message of client annoucing the creation of header part of netcdf file
   void CContext::recvCreateFileHeader(CEventServer& event)
   {
      CBufferIn* buffer=event.subEvents.begin()->buffer;
      string id;
      *buffer>>id;
      get(id)->recvCreateFileHeader(*buffer);
   }

   //! Server side: Receive a message of client annoucing the creation of header part of netcdf file
   void CContext::recvCreateFileHeader(CBufferIn& buffer)
   {
      if (!hasClient && hasServer) 
        createFileHeader();
   }

   //! Client side: Send a message to do some post processing on server
   void CContext::sendProcessingGridOfEnabledFields()
   {
      // Use correct context client to send message
     int nbSrvPools = (this->hasServer) ? (this->hasClient ? this->clientPrimServer.size() : 0) : 1;
     for (int i = 0; i < nbSrvPools; ++i)
     {
       CContextClient* contextClientTmp = (0 != clientPrimServer.size()) ? clientPrimServer[i] : client;
       CEventClient event(getType(),EVENT_ID_PROCESS_GRID_ENABLED_FIELDS);

       if (contextClientTmp->isServerLeader())
       {
         CMessage msg;
         if (hasServer)
           msg<<this->getIdServer(i);
         else
           msg<<this->getIdServer();
         const std::list<int>& ranks = contextClientTmp->getRanksServerLeader();
         for (std::list<int>::const_iterator itRank = ranks.begin(), itRankEnd = ranks.end(); itRank != itRankEnd; ++itRank)
           event.push(*itRank,1,msg);
         contextClientTmp->sendEvent(event);
       }
       else contextClientTmp->sendEvent(event);
     }
   }

   //! Server side: Receive a message to do some post processing
   void CContext::recvProcessingGridOfEnabledFields(CEventServer& event)
   {
      CBufferIn* buffer=event.subEvents.begin()->buffer;
      string id;
      *buffer>>id;      
   }

   //! Client side: Send a message to do some post processing on server
   void CContext::sendPostProcessing()
   {
      // Use correct context client to send message
     // int nbSrvPools = (hasServer) ? clientPrimServer.size() : 1;
     int nbSrvPools = (this->hasServer) ? (this->hasClient ? this->clientPrimServer.size() : 0) : 1;
     for (int i = 0; i < nbSrvPools; ++i)
     {
       CContextClient* contextClientTmp = (hasServer) ? clientPrimServer[i] : client;
       CEventClient event(getType(),EVENT_ID_POST_PROCESS);
       if (contextClientTmp->isServerLeader())
       {
         CMessage msg;
         if (hasServer)
           msg<<this->getIdServer(i);
         else
           msg<<this->getIdServer();
         const std::list<int>& ranks = contextClientTmp->getRanksServerLeader();
         for (std::list<int>::const_iterator itRank = ranks.begin(), itRankEnd = ranks.end(); itRank != itRankEnd; ++itRank)
         event.push(*itRank,1,msg);
         contextClientTmp->sendEvent(event);
       }
       else contextClientTmp->sendEvent(event);
     }
   }

   //! Server side: Receive a message to do some post processing
   void CContext::recvPostProcessing(CEventServer& event)
   {
      CBufferIn* buffer=event.subEvents.begin()->buffer;
      string id;
      *buffer>>id;
      get(id)->recvPostProcessing(*buffer);
   }

   //! Server side: Receive a message to do some post processing
   void CContext::recvPostProcessing(CBufferIn& buffer)
   {
      CCalendarWrapper::get(CCalendarWrapper::GetDefName())->createCalendar();
      postProcessing();
   }

   const StdString& CContext::getIdServer()
   {
      if (hasClient)
      {
        idServer_ = this->getId();
        idServer_ += "_server";
        return idServer_;
      }
      if (hasServer) return (this->getId());
   }

   const StdString& CContext::getIdServer(const int i)
   {
     idServer_ = this->getId();
     idServer_ += "_server_";
     idServer_ += boost::lexical_cast<string>(i);
     return idServer_;
   }


   /*!
   \brief Do some simple post processings after parsing xml file
      After the xml file (iodef.xml) is parsed, it is necessary to build all relations among
   created object, e.g: inhertance among fields, domain, axis. After that, all fiels as well as their parents (reference fields),
   which will be written out into netcdf files, are processed
   */
   void CContext::postProcessing()
   {
     if (isPostProcessed) return;

      // Make sure the calendar was correctly created
      if (!calendar)
        ERROR("CContext::postProcessing()", << "A calendar must be defined for the context \"" << getId() << "!\"")
      else if (calendar->getTimeStep() == NoneDu)
        ERROR("CContext::postProcessing()", << "A timestep must be defined for the context \"" << getId() << "!\"")
      // Calendar first update to set the current date equals to the start date
      calendar->update(0);

      // Find all inheritance in xml structure
      this->solveAllInheritance();

//      ShowTree(info(10));

      // Check if some axis, domains or grids are eligible to for compressed indexed output.
      // Warning: This must be done after solving the inheritance and before the rest of post-processing
      checkAxisDomainsGridsEligibilityForCompressedOutput();      

      // Check if some automatic time series should be generated
      // Warning: This must be done after solving the inheritance and before the rest of post-processing      

      // The timeseries should only be prepared in client
      if (hasClient && !hasServer) prepareTimeseries();

      //Initialisation du vecteur 'enabledFiles' contenant la liste des fichiers à sortir.
      this->findEnabledFiles();
      
      // For now, only read files with client and only one level server
      if (hasClient && !hasServer) this->findEnabledReadModeFiles();

      // Find all enabled fields of each file
      this->findAllEnabledFields();
      // For now, only read files with client and only one level server
      if (hasClient && !hasServer) this->findAllEnabledFieldsInReadModeFiles();


      if (hasClient && !hasServer)
      {
       // Try to read attributes of fields in file then fill in corresponding grid (or domain, axis)
       this->readAttributesOfEnabledFieldsInReadModeFiles();
      }

      // Only search and rebuild all reference objects of enable fields, don't transform
      this->solveOnlyRefOfEnabledFields(false);

      // Search and rebuild all reference object of enabled fields, and transform
      this->solveAllRefOfEnabledFieldsAndTransform(false);

      // Find all fields with read access from the public API
      if (hasClient && !hasServer) findFieldsWithReadAccess();
      // and solve the all reference for them
      if (hasClient && !hasServer) solveAllRefOfFieldsWithReadAccess();

      isPostProcessed = true;
   }

   /*!
    * Compute the required buffer size to send the attributes (mostly those grid related).
    *
    * \param maxEventSize [in/out] the size of the bigger event for each connected server
    */
   std::map<int, StdSize> CContext::getAttributesBufferSize(std::map<int, StdSize>& maxEventSize, CContextClient* contextClient)
   {
     std::map<int, StdSize> attributesSize;

     if (hasClient)
     {
       size_t numEnabledFiles = this->enabledFiles.size();
       for (size_t i = 0; i < numEnabledFiles; ++i)
       {
         CFile* file = this->enabledFiles[i];
         if (file->getContextClient() == contextClient)
         {
           std::vector<CField*> enabledFields = file->getEnabledFields();
           size_t numEnabledFields = enabledFields.size();
           for (size_t j = 0; j < numEnabledFields; ++j)
           {
             const std::map<int, StdSize> mapSize = enabledFields[j]->getGridAttributesBufferSize();
             std::map<int, StdSize>::const_iterator it = mapSize.begin(), itE = mapSize.end();
             for (; it != itE; ++it)
             {
               // If attributesSize[it->first] does not exist, it will be zero-initialized
               // so we can use it safely without checking for its existance
               if (attributesSize[it->first] < it->second)
                 attributesSize[it->first] = it->second;

               if (maxEventSize[it->first] < it->second)
                 maxEventSize[it->first] = it->second;
             }
           }
         }
       }
     }

     return attributesSize;
   }

   /*!
    * Compute the required buffer size to send the fields data.
    *
    * \param maxEventSize [in/out] the size of the bigger event for each connected server
    */
   std::map<int, StdSize> CContext::getDataBufferSize(std::map<int, StdSize>& maxEventSize, CContextClient* contextClient)
   {
     CFile::mode_attr::t_enum mode = hasClient ? CFile::mode_attr::write : CFile::mode_attr::read;

     std::map<int, StdSize> dataSize;

     // Find all reference domain and axis of all active fields
     size_t numEnabledFiles = this->enabledFiles.size();
     for (size_t i = 0; i < numEnabledFiles; ++i)
     {
       CFile* file = this->enabledFiles[i];
       if (file->getContextClient() == contextClient)
       {
         CFile::mode_attr::t_enum fileMode = file->mode.isEmpty() ? CFile::mode_attr::write : file->mode.getValue();

         if (fileMode == mode)
         {
           std::vector<CField*> enabledFields = file->getEnabledFields();
           size_t numEnabledFields = enabledFields.size();
           for (size_t j = 0; j < numEnabledFields; ++j)
           {
             const std::vector<std::map<int, StdSize> > mapSize = enabledFields[j]->getGridDataBufferSize();
             for (size_t c = 0; c < mapSize.size(); ++c)
             {
               std::map<int, StdSize>::const_iterator it = mapSize[c].begin(), itE = mapSize[c].end();
               for (; it != itE; ++it)
               {
                 // If dataSize[it->first] does not exist, it will be zero-initialized
                 // so we can use it safely without checking for its existance
                 if (CXios::isOptPerformance)
                   dataSize[it->first] += it->second;
                 else if (dataSize[it->first] < it->second)
                   dataSize[it->first] = it->second;

                 if (maxEventSize[it->first] < it->second)
                   maxEventSize[it->first] = it->second;
               }
             }
           }
         }
       }
     }

     return dataSize;
   }

   //! Client side: Send infomation of active files (files are enabled to write out)
   void CContext::sendEnabledFiles()
   {
     int size = this->enabledFiles.size();

     // In a context, each type has a root definition, e.g: axis, domain, field.
     // Every object must be a child of one of these root definition. In this case
     // all new file objects created on server must be children of the root "file_definition"
     StdString fileDefRoot("file_definition");
     CFileGroup* cfgrpPtr = CFileGroup::get(fileDefRoot);

     for (int i = 0; i < size; ++i)
     {
       cfgrpPtr->sendCreateChild(this->enabledFiles[i]->getId(),enabledFiles[i]->getContextClient());
       this->enabledFiles[i]->sendAllAttributesToServer(enabledFiles[i]->getContextClient());
       this->enabledFiles[i]->sendAddAllVariables(enabledFiles[i]->getContextClient());
     }
   }

   //! Client side: Send information of active fields (ones are written onto files)
   void CContext::sendEnabledFields()
   {
     int size = this->enabledFiles.size();
     for (int i = 0; i < size; ++i)
     {
       this->enabledFiles[i]->sendEnabledFields(enabledFiles[i]->getContextClient());
     }
   }

   //! Client side: Check if the defined axis, domains and grids are eligible for compressed indexed output
   void CContext::checkAxisDomainsGridsEligibilityForCompressedOutput()
   {
     if (!hasClient) return;

     const vector<CAxis*> allAxis = CAxis::getAll();
     for (vector<CAxis*>::const_iterator it = allAxis.begin(); it != allAxis.end(); it++)
       (*it)->checkEligibilityForCompressedOutput();

     const vector<CDomain*> allDomains = CDomain::getAll();
     for (vector<CDomain*>::const_iterator it = allDomains.begin(); it != allDomains.end(); it++)
       (*it)->checkEligibilityForCompressedOutput();

     const vector<CGrid*> allGrids = CGrid::getAll();
     for (vector<CGrid*>::const_iterator it = allGrids.begin(); it != allGrids.end(); it++)
       (*it)->checkEligibilityForCompressedOutput();
   }

   //! Client side: Prepare the timeseries by adding the necessary files
   void CContext::prepareTimeseries()
   {
     if (!hasClient) return;

     const std::vector<CFile*> allFiles = CFile::getAll();
     for (size_t i = 0; i < allFiles.size(); i++)
     {
       CFile* file = allFiles[i];

       std::vector<CVariable*> fileVars, fieldVars, vars = file->getAllVariables();
       for (size_t k = 0; k < vars.size(); k++)
       {
         CVariable* var = vars[k];

         if (var->ts_target.isEmpty()
              || var->ts_target == CVariable::ts_target_attr::file || var->ts_target == CVariable::ts_target_attr::both)
           fileVars.push_back(var);

         if (!var->ts_target.isEmpty()
              && (var->ts_target == CVariable::ts_target_attr::field || var->ts_target == CVariable::ts_target_attr::both))
           fieldVars.push_back(var);
       }

       if (!file->timeseries.isEmpty() && file->timeseries != CFile::timeseries_attr::none)
       {
         StdString fileNameStr("%file_name%") ;
         StdString tsPrefix = !file->ts_prefix.isEmpty() ? file->ts_prefix : fileNameStr ;
         
         StdString fileName=file->getFileOutputName();
         size_t pos=tsPrefix.find(fileNameStr) ;
         while (pos!=std::string::npos)
         {
           tsPrefix=tsPrefix.replace(pos,fileNameStr.size(),fileName) ;
           pos=tsPrefix.find(fileNameStr) ;
         }
        
         const std::vector<CField*> allFields = file->getAllFields();
         for (size_t j = 0; j < allFields.size(); j++)
         {
           CField* field = allFields[j];

           if (!field->ts_enabled.isEmpty() && field->ts_enabled)
           {
             CFile* tsFile = CFile::create();
             tsFile->duplicateAttributes(file);

             // Add variables originating from file and targeted to timeserie file
             for (size_t k = 0; k < fileVars.size(); k++)
               tsFile->getVirtualVariableGroup()->addChild(fileVars[k]);

            
             tsFile->name = tsPrefix + "_";
             if (!field->name.isEmpty())
               tsFile->name.get() += field->name;
             else if (field->hasDirectFieldReference()) // We cannot use getBaseFieldReference() just yet
               tsFile->name.get() += field->field_ref;
             else
               tsFile->name.get() += field->getId();

             if (!field->ts_split_freq.isEmpty())
               tsFile->split_freq = field->ts_split_freq;

             CField* tsField = tsFile->addField();
             tsField->field_ref = field->getId();

             // Add variables originating from file and targeted to timeserie field
             for (size_t k = 0; k < fieldVars.size(); k++)
               tsField->getVirtualVariableGroup()->addChild(fieldVars[k]);

             vars = field->getAllVariables();
             for (size_t k = 0; k < vars.size(); k++)
             {
               CVariable* var = vars[k];

               // Add variables originating from field and targeted to timeserie field
               if (var->ts_target.isEmpty()
                    || var->ts_target == CVariable::ts_target_attr::field || var->ts_target == CVariable::ts_target_attr::both)
                 tsField->getVirtualVariableGroup()->addChild(var);

               // Add variables originating from field and targeted to timeserie file
               if (!var->ts_target.isEmpty()
                    && (var->ts_target == CVariable::ts_target_attr::file || var->ts_target == CVariable::ts_target_attr::both))
                 tsFile->getVirtualVariableGroup()->addChild(var);
             }

             tsFile->solveFieldRefInheritance(true);

             if (file->timeseries == CFile::timeseries_attr::exclusive)
               field->enabled = false;
           }
         }

         // Finally disable the original file is need be
         if (file->timeseries == CFile::timeseries_attr::only)
          file->enabled = false;
       }
     }
   }

   //! Client side: Send information of reference grid of active fields
   void CContext::sendRefGrid()
   {
     std::set<StdString> gridIds;
     int sizeFile = this->enabledFiles.size();
     CFile* filePtr(NULL);

     // Firstly, find all reference grids of all active fields
     for (int i = 0; i < sizeFile; ++i)
     {
       filePtr = this->enabledFiles[i];
       std::vector<CField*> enabledFields = filePtr->getEnabledFields();
       int sizeField = enabledFields.size();
       for (int numField = 0; numField < sizeField; ++numField)
       {
         if (0 != enabledFields[numField]->getRelGrid())
           gridIds.insert(CGrid::get(enabledFields[numField]->getRelGrid())->getId());
       }
     }

     // Create all reference grids on server side
     StdString gridDefRoot("grid_definition");
     CGridGroup* gridPtr = CGridGroup::get(gridDefRoot);
     std::set<StdString>::const_iterator it, itE = gridIds.end();
     for (it = gridIds.begin(); it != itE; ++it)
     {
       gridPtr->sendCreateChild(*it);
       CGrid::get(*it)->sendAllAttributesToServer();
       CGrid::get(*it)->sendAllDomains();
       CGrid::get(*it)->sendAllAxis();
       CGrid::get(*it)->sendAllScalars();
     }
   }


   //! Client side: Send information of reference domain and axis of active fields
   void CContext::sendRefDomainsAxis()
   {
     std::set<StdString> domainIds, axisIds, scalarIds;

     // Find all reference domain and axis of all active fields
     int numEnabledFiles = this->enabledFiles.size();
     for (int i = 0; i < numEnabledFiles; ++i)
     {
       std::vector<CField*> enabledFields = this->enabledFiles[i]->getEnabledFields();
       int numEnabledFields = enabledFields.size();
       for (int j = 0; j < numEnabledFields; ++j)
       {
         const std::vector<StdString>& prDomAxisScalarId = enabledFields[j]->getRefDomainAxisIds();
         if ("" != prDomAxisScalarId[0]) domainIds.insert(prDomAxisScalarId[0]);
         if ("" != prDomAxisScalarId[1]) axisIds.insert(prDomAxisScalarId[1]);
         if ("" != prDomAxisScalarId[2]) scalarIds.insert(prDomAxisScalarId[2]);
       }
     }

     // Create all reference axis on server side
     std::set<StdString>::iterator itDom, itAxis, itScalar;
     std::set<StdString>::const_iterator itE;

     StdString scalarDefRoot("scalar_definition");
     CScalarGroup* scalarPtr = CScalarGroup::get(scalarDefRoot);
     itE = scalarIds.end();
     for (itScalar = scalarIds.begin(); itScalar != itE; ++itScalar)
     {
       if (!itScalar->empty())
       {
         scalarPtr->sendCreateChild(*itScalar);
         CScalar::get(*itScalar)->sendAllAttributesToServer();
       }
     }

     StdString axiDefRoot("axis_definition");
     CAxisGroup* axisPtr = CAxisGroup::get(axiDefRoot);
     itE = axisIds.end();
     for (itAxis = axisIds.begin(); itAxis != itE; ++itAxis)
     {
       if (!itAxis->empty())
       {
         axisPtr->sendCreateChild(*itAxis);
         CAxis::get(*itAxis)->sendAllAttributesToServer();
       }
     }

     // Create all reference domains on server side
     StdString domDefRoot("domain_definition");
     CDomainGroup* domPtr = CDomainGroup::get(domDefRoot);
     itE = domainIds.end();
     for (itDom = domainIds.begin(); itDom != itE; ++itDom)
     {
       if (!itDom->empty()) {
          domPtr->sendCreateChild(*itDom);
          CDomain::get(*itDom)->sendAllAttributesToServer();
       }
     }
   }

   //! Update calendar in each time step
   void CContext::updateCalendar(int step)
   {
      info(50) << "updateCalendar : before : " << calendar->getCurrentDate() << endl;
      calendar->update(step);
      info(50) << "updateCalendar : after : " << calendar->getCurrentDate() << endl;
#ifdef XIOS_MEMTRACK_LIGHT
      info(50) << " Current memory used by XIOS : "<<  MemTrack::getCurrentMemorySize()*1.0/(1024*1024)<<" Mbyte, at timestep "<<step<<" of context "<<this->getId()<<endl ;
#endif
      if (hasClient)
      {
        checkPrefetchingOfEnabledReadModeFiles();
        garbageCollector.invalidate(calendar->getCurrentDate());
      }
   }

   //! Server side: Create header of netcdf file
   void CContext::createFileHeader(void )
   {
      vector<CFile*>::const_iterator it;

      for (it=enabledFiles.begin(); it != enabledFiles.end(); it++)
      {
         (*it)->initFile();
      }
   }

   //! Get current context
   CContext* CContext::getCurrent(void)
   {
     return CObjectFactory::GetObject<CContext>(CObjectFactory::GetCurrentContextId()).get();
   }

   /*!
   \brief Set context with an id be the current context
   \param [in] id identity of context to be set to current
   */
   void CContext::setCurrent(const string& id)
   {
     CObjectFactory::SetCurrentContextId(id);
     CGroupFactory::SetCurrentContextId(id);
   }

  /*!
  \brief Create a context with specific id
  \param [in] id identity of new context
  \return pointer to the new context or already-existed one with identity id
  */
  CContext* CContext::create(const StdString& id)
  {
    CContext::setCurrent(id);

    bool hasctxt = CContext::has(id);
    CContext* context = CObjectFactory::CreateObject<CContext>(id).get();
    getRoot();
    if (!hasctxt) CGroupFactory::AddChild(root, context->getShared());

#define DECLARE_NODE(Name_, name_) \
    C##Name_##Definition::create(C##Name_##Definition::GetDefName());
#define DECLARE_NODE_PAR(Name_, name_)
#include "node_type.conf"

    return (context);
  }


     //! Server side: Receive a message to do some post processing
  void CContext::recvRegistry(CEventServer& event)
  {
    CBufferIn* buffer=event.subEvents.begin()->buffer;
    string id;
    *buffer>>id;
    get(id)->recvRegistry(*buffer);
  }

  void CContext::recvRegistry(CBufferIn& buffer)
  {
    if (server->intraCommRank==0)
    {
      CRegistry registry(server->intraComm) ;
      registry.fromBuffer(buffer) ;
      registryOut->mergeRegistry(registry) ;
    }
  }

  void CContext::sendRegistry(void)
  {
    registryOut->hierarchicalGatherRegistry() ;

    // Use correct context client to send message
    int nbSrvPools = (this->hasServer) ? (this->hasClient ? this->clientPrimServer.size() : 0) : 1;
    for (int i = 0; i < nbSrvPools; ++i)
    {
      CContextClient* contextClientTmp = (hasServer) ? clientPrimServer[i] : client;
      CEventClient event(CContext::GetType(), CContext::EVENT_ID_SEND_REGISTRY);
        if (contextClientTmp->isServerLeader())
        {
           CMessage msg ;
           if (hasServer)
             msg<<this->getIdServer(i);
           else
             msg<<this->getIdServer();
           if (contextClientTmp->clientRank==0) msg<<*registryOut ;
           const std::list<int>& ranks = contextClientTmp->getRanksServerLeader();
           for (std::list<int>::const_iterator itRank = ranks.begin(), itRankEnd = ranks.end(); itRank != itRankEnd; ++itRank)
             event.push(*itRank,1,msg);
           contextClientTmp->sendEvent(event);
         }
         else contextClientTmp->sendEvent(event);
    }
  }

  /*!
  * \fn bool CContext::isFinalized(void)
  * Context is finalized if it received context post finalize event.
  */
  bool CContext::isFinalized(void)
  {
    return finalized;
  }

} // namespace xios