DIS Broker Example

A Modified DIS Broker that changes the Set Data interaction

---

/****************************************************************************
 * Copyright (c) 2016 VT MAK
 * All rights reserved.
 ****************************************************************************/


#include <widgets/brokerApp.h>
#include <disBroker/disBrokerInitializer.h>
#include <disBroker/disBrokerDialog.h>
#include <vlutil/vlExceptions.h>
#include <vlutil/vlMiniDumper.h>
#include <portal/pConnection.h>
#include <setDataInTrans.h>
#include <iostream>

int main( int argc, char* argv[] )
{
   DtINIT_MINIDUMPER( "Modified DIS Broker" );

   try
   {
      using namespace MAKVrExchange;
      using namespace MAKVrExchange::DtDisBroker;

      DtInfo << "Starting Modified DIS Broker Example" << std::endl;

      // Load the configuration options
      DtDisBrokerInitializer* disInit =
         new DtDisBrokerInitializer( argc, argv, DtPortalConnection::version().c_str() );
      disInit->parseCmdLine(); //Automatically loads the file specified by the CmdLine

      // Specify that we are creating a DIS Broker, and a GUI for the broker.
      DtBrokerApp::setBrokerCreator( MAKVrExchange::DtDisBroker::DtDisBroker::create );
      DtBrokerApp::setBrokerDialogCreator( DtDisBrokerDialog::create );
      DtBrokerApp* brokerApp = new DtBrokerApp( disInit );

      // Install the modified translator by creating a default factory. This needs
      // to be done before the call to DtBrokerApp::run() where all the translator
      // instances are created. The translator name is used by the factory, so
      // if you want to replace a translator it needs to have the same name.
      brokerApp->broker()->interactionTranslatorFactory()->addCreator<ModSetDataInteractionTranslator>();

      // Run the broker.
      brokerApp->run( disInit->showConnectionInfoDialog() );

      DtDELETE( brokerApp );
   }
   DtCATCH_AND_WARN( std::cout )

   return 0;
}

---

/****************************************************************************
 * Copyright (c) 2015 VT MAK
 * All rights reserved.
 ****************************************************************************/


#include "setDataInTrans.h"
#include <portal/pSetDataInter.h>
#include <vl/exerciseConn.h>
#include <vl/setDataInteraction.h>
#include <disBroker/disBroker.h>

using namespace MAKVrExchange;

ModSetDataInteractionTranslator::ModSetDataInteractionTranslator(
      DtBroker* broker )
   : ParentClass( broker, translatorName(),
      DtPortalSetDataInteraction::theKind )
{
   // Users can print anywhere they want, but DtInfo is the default stream used
   // by VR-Exchange for information messages. It is routed to a log file as specified
   // by the DIS Broker configuration files.
   DtInfo << "In Constructor for Modified SetDataInteraction Translator!" << std::endl;
}

ModSetDataInteractionTranslator::~ModSetDataInteractionTranslator()
{
}

void ModSetDataInteractionTranslator::initializeDisCallbacks()
{
   DtSetDataInteraction::addCallback(
      disBroker()->connection(), receiveDisInteraction, this );
}

void ModSetDataInteractionTranslator::initializePortalCallbacks()
{
   DtPortalSetDataInteraction::addCallback(
      myBroker->portalConnection(), receivePortalInteraction, this );
}

void ModSetDataInteractionTranslator::removeDisCallbacks()
{
   DtSetDataInteraction::removeCallback(
      disBroker()->connection(), receiveDisInteraction, this );
}

void ModSetDataInteractionTranslator::removePortalCallbacks()
{
   DtPortalSetDataInteraction::removeCallback(
      myBroker->portalConnection(), receivePortalInteraction, this );
}

void ModSetDataInteractionTranslator::createInteraction(
   const DtPortalSetDataInteraction& incoming )
{
   DtSetDataInteraction outgoing;

   translate( &outgoing, incoming );

   if ( myBroker->isTranslatorDebuggingOn(name()) )
   {
      printIncomingOutgoingInteractions( incoming, outgoing );
   }

   disBroker()->connection()->sendStamped( outgoing );
   ++myNumInteractions;
}

void ModSetDataInteractionTranslator::createPortalInteraction(
   const DtSetDataInteraction& incoming )
{
   DtPortalSetDataInteraction outgoing;

   translate( &outgoing, incoming );

   if ( myBroker->isTranslatorDebuggingOn(name()) )
   {
      printIncomingOutgoingInteractions( incoming, outgoing );
   }

   myBroker->portalConnection()->send( outgoing );
   ++myNumInteractions;
}

void ModSetDataInteractionTranslator::receiveDisInteraction(
   DtSetDataInteraction *interaction, void *userSetData )
{
   ModSetDataInteractionTranslator *translator =
      static_cast< ModSetDataInteractionTranslator* >( userSetData );
   translator->createPortalInteraction( *interaction );
}

void ModSetDataInteractionTranslator::receivePortalInteraction(
   const DtPortalSetDataInteraction &interaction, void *userSetData )
{
   ModSetDataInteractionTranslator *translator =
      static_cast< ModSetDataInteractionTranslator* >( userSetData );
   translator->createInteraction( interaction );
}


//---------------------------------------------------------------------
// This is DIS -> PORTAL
//---------------------------------------------------------------------
DtPortalSetDataInteraction* ModSetDataInteractionTranslator::translate(
   DtPortalSetDataInteraction* destination,
   const DtSetDataInteraction& source )
{
   destination->setOriginatingEntity( disBroker()->convertGlobalId( source.senderId() ));
   destination->setReceivingEntity( disBroker()->convertGlobalId( source.receiverId() ));
   destination->setRequestIdentifier( source.requestId() );

   // Fixed Datums
   {
      DtFixedLengthDataArray* fixedDatums = &destination->fixedDatums();
      fixedDatums->resize( source.numFixedFields() );

      DtFixedLengthDataArray::iterator pos = fixedDatums->begin();
      // Indexes for Var Datums start at 1 in VR-Link
      for ( int index = 1; pos != fixedDatums->end(); ++pos, ++index )
      {
         (*pos).setId( source.fixedDatumId( index ));
         DtDatumRetCode returnCode = DtDatumBadLength;
         DtU32 fixedValue = source.datumValUnsigned32( DtFixed, index, &returnCode );
         if (returnCode == DtDatumValid)
         {
            (*pos).setValue( fixedValue );
         }
      }
   }

   // Variable Datum Set
   {
      DtAttributeValuePairList* variableDatumSet = &destination->variableDatumSet();
      variableDatumSet->resize( source.numVarFields() );

      DtAttributeValuePairList::iterator pos = variableDatumSet->begin();
      // Indexes for Var Datums start at 1 in VR-Link
      for ( int index = 1; pos != variableDatumSet->end(); ++pos, ++index )
      {
         (*pos).first = DtString( source.varDatumId( index ));
         (*pos).second.setData( source.datumValByteArray( DtVar, index ),
                                source.datumSizeBytes( DtVar, index ));
      }
   }

   return destination;
}

//---------------------------------------------------------------------
// This is Portal -> DIS
//---------------------------------------------------------------------
DtSetDataInteraction* ModSetDataInteractionTranslator::translate(
   DtSetDataInteraction* destination,
   const DtPortalSetDataInteraction& source )
{
   destination->setSenderId( disBroker()->convertGlobalId( source.originatingEntity() ));
   destination->setReceiverId( disBroker()->convertGlobalId( source.receivingEntity() ));
   destination->setRequestId( source.requestIdentifier() );

   // Fixed Datum Set
   {
      destination->setNumFixedFields( (int)source.fixedDatums().size() );

      DtFixedLengthDataArray::const_iterator pos = source.fixedDatums().begin();
      // Indexes for Var Datums start at 1 in VR-Link
      for (int index = 1; pos != source.fixedDatums().end(); ++pos, ++index)
      {
         DtDatumRetCode returnCode = DtDatumBadLength;
         DtDatumParam id = (DtDatumParam)(*pos).id();
         destination->setDatumParam( DtFixed, index, id, &returnCode );
         if (returnCode == DtDatumValid)
         {
            DtU32 value = (*pos).value();
            destination->setDatumValUnsigned32( DtFixed, index, value, &returnCode );
         }
      }
   }

   // Variable Datum true
   {
      destination->setNumVarFields( (int)source.variableDatumSet().size() );

      DtAttributeValuePairList::const_iterator pos = source.variableDatumSet().begin();
      // Indexes for Var Datums start at 1 in VR-Link
      for (int index = 1; pos != source.variableDatumSet().end(); ++pos, ++index)
      {
         DtDatumRetCode returnCode = DtDatumBadLength;
         DtDatumParam varDatumId = (DtDatumParam)atol( (*pos).first );
         destination->setDatumParam( DtVar, index, varDatumId, &returnCode );
         if (returnCode == DtDatumValid)
         {
            int length = (*pos).second.size();
            destination->setVarDataBytes( index, length, &returnCode );
            const char* value = (*pos).second.data();
            destination->setDatumValByteArray( DtVar, index, value, &returnCode );
         }
      }
   }

   return destination;
}