runtimeEvenDistributionLoadBalancer.h

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/*******************************************************************************
** Copyright (c) 2023 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/

#pragma once


#include "vrfutil/vrfutilDefines.h"
#include "vrfutil/backend.h"
#include <string>

class DtString;
class DtAddressMap;
class DtList;
class DtVrfFileParser;

class DT_DLL_vrfutil DtRuntimeEvenDistributionLoadBalancer
{
public:

   DtRuntimeEvenDistributionLoadBalancer();

   virtual ~DtRuntimeEvenDistributionLoadBalancer();

   static bool balance(DtAddressMap* map, const DtVrfFileParser*, const DtList* backends, bool& remapped, void* usr, const DtString&);
   static std::string Type() { return "DtRuntimeEvenDistributionLoadBalancer"; };

protected:
   typedef std::map<int, std::vector<DtSimulationAddress> > Scores;
   struct BackendStatus
   {
      BackendStatus() : score(0), loaded(false) {};

      DtBackend::ObjectCounts objectCounts;
      int score;
      bool loaded;
   };

   typedef std::map<DtString, BackendStatus> Backends;

   static int totalScore(const DtBackend::ObjectCounts&);

   static int score(int kind, int category);

private:

   DtRuntimeEvenDistributionLoadBalancer(const DtRuntimeEvenDistributionLoadBalancer& orig);

   DtRuntimeEvenDistributionLoadBalancer& operator=(const DtRuntimeEvenDistributionLoadBalancer& orig);
};