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/* This file is part of the OpenLB library
*
* Copyright (C) 2012 Jonas Fietz, Mathias J. Krause
* E-mail contact: info@openlb.net
* The most recent release of OpenLB can be downloaded at
* <http://www.openlb.net/>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef HEURISTIC_LOAD_BALANCER_H
#define HEURISTIC_LOAD_BALANCER_H
#include "communication/mpiManager.h"
#include "geometry/cuboidGeometry2D.h"
#include "geometry/cuboid3D.h"
#include "geometry/cuboid3D.hh"
#include "geometry/cuboidGeometry3D.h"
#include "geometry/cuboidGeometry3D.hh"
#include "communication/loadBalancer.h"
namespace olb {
/** Constructs a load balancer from a given cuboid geometry using a heurist.
* \param cGeometry cuboid geometry to base the load balance on
* \param blockGeometry used to determine number of full and empty cells if given
* \param ratioFullEmpty time it takes for full cells in relation to empty cells
*
* This class has a virtual method call in its destructor and should therefore
* not be used as a base class.
*/
template<typename T>
class HeuristicLoadBalancer final : public LoadBalancer<T> {
private:
// Handles the MPI communication
#ifdef PARALLEL_MODE_MPI
singleton::MpiNonBlockingHelper _mpiNbHelper;
#endif
CuboidGeometry3D<T>* _cGeometry3d;
CuboidGeometry2D<T>* _cGeometry2d;
double _ratioFullEmpty;
public:
HeuristicLoadBalancer() {};
~HeuristicLoadBalancer() override;
HeuristicLoadBalancer(CuboidGeometry3D<T>& cGeometry3d, const double ratioFullEmpty=1., const double weightEmpty=.0);
HeuristicLoadBalancer(CuboidGeometry2D<T>& cGeometry2d, const double ratioFullEmpty=1., const double weightEmpty=.0);
void reInit(CuboidGeometry3D<T>& cGeometry3d, const double ratioFullEmpty=1., const double weightEmpty=.0) override;
void reInit(CuboidGeometry2D<T>& cGeometry2d, const double ratioFullEmpty=1., const double weightEmpty=.0) override;
/// Swap method
void swap(HeuristicLoadBalancer<T>& loadBalancer);
/// Write itself into Stringstream
void writeToStream(std::ostream& stream) override;
/// Write itself into File
void writeToFile(std::string fileName) override;
};
} // namespace olb
#endif
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