WorkerMaster Class Reference

Inheritance diagram for WorkerMaster:

Public Member Functions
	WorkerMaster (Logger logger)
	WorkerMaster (VariableMap const &variable_map, const std::filesystem::path &path_to_mps, const std::string &solver_name, const int log_level, int subproblems_count, SolverLogManager &solver_log_manager, bool mps_has_alpha, Logger logger)
	Constructor of a Master Problem.
void	get (Point &x0, double &overall_subpb_cost_under_approx, DblVector &single_subpb_costs_under_approx)
	Return optimal variables of a problem.
void	get_dual_values (std::vector< double > &dual) const
	Set dual values of a problem in a vector.
int	get_number_constraint () const
	Return number of constraint in a problem.
void	add_cut (Point const &s, Point const &x0, double const &rhs) const
	Add benders cut to a problem.
void	add_cut_by_iter (int const i, Point const &s, double const &sx0, double const &rhs) const
	Add benders cut to a problem.
void	add_dynamic_cut (Point const &s, double const &sx0, double const &rhs) const
	Add benders cut to a problem.
void	addSubproblemCut (int i, Point const &s, Point const &x0, double const &rhs) const
	Add one benders cut to a problem.
void	fix_alpha (double const &bestUB) const
	Fix an upper bound and the variable overall_subpb_cost_under_approx of a problem.
virtual void	DeactivateIntegrityConstraints () const
virtual void	ActivateIntegrityConstraints () const
virtual std::vector< int >	get_id_nb_units () const
Public Member Functions inherited from Worker
	Worker (Logger logger)
void	init (VariableMap const &variable_map, const std::filesystem::path &path_to_mps, std::string const &solver_name, int log_level, SolverLogManager &solver_log_manager)
	Initialization of a problem.
void	get_value (double &lb) const
	Return the optimal value of a problem.
void	get_splex_num_of_ite_last (int &result) const
	Get the number of iteration needed to solve a problem.
void	free ()
	Free the problem.
void	write_basis (const std::filesystem::path &filename) const
virtual SolverAbstract::Ptr	solver () const
void	solve (int &lp_status, const std::string &outputroot, const std::string &output_master_mps_file_name, Writer writer) const
	Method to solve a problem.
int	RowIndex (const std::string &row_name) const
void	ChangeRhs (int id_row, double val) const
void	GetRhs (double *val, int id_row) const
void	AddRows (std::vector< char > const &qrtype_p, std::vector< double > const &rhs_p, std::vector< double > const &range_p, std::vector< int > const &mstart_p, std::vector< int > const &mclind_p, std::vector< double > const &dmatval_p, const std::vector< std::string > &row_names) const
int	Getnrows () const
	Returns the number of rows (constraints)
int	Getncols () const

Additional Inherited Members
Public Attributes inherited from Worker
std::filesystem::path	_path_to_mps
VariableMap	_name_to_id
Int2Str	_id_to_name
SolverAbstract::Ptr	_solver
bool	_is_master = false
Logger	logger_

Constructor & Destructor Documentation

WorkerMaster()

WorkerMaster::WorkerMaster	(	VariableMap const &	variable_map,
		const std::filesystem::path &	path_to_mps,
		const std::string &	solver_name,
		const int	log_level,
		int	subproblems_count,
		SolverLogManager &	solver_log_manager,
		bool	mps_has_alpha,
		Logger	logger
	)

Constructor of a Master Problem.

Construct a Master Problem by loading mps and mapping files and adding the variable overall_subpb_cost_under_approx

Parameters

variable_map	: map linking each variable to its id in the problem
path_to_mps	: path to the problem mps file
solver_name	: solver name
log_level	: solver log level
subproblems_count	: number of subproblems

Member Function Documentation

add_cut()

void WorkerMaster::add_cut	(	Point const &	s,
		Point const &	x_cut,
		double const &	rhs
	)		const

Add benders cut to a problem.

Parameters

s	: subgradient of optimal slave variables
x_cut	: master separation point
rhs	: optimal slave value

add_cut_by_iter()

void WorkerMaster::add_cut_by_iter	(	int const	i,
		Point const &	s,
		double const &	sx0,
		double const &	rhs
	)		const

Add benders cut to a problem.

Parameters

i	: identifier of a subproblem
s	: optimal slave variables
sx0	: subgradient times x0
rhs	: optimal slave value

add_dynamic_cut()

void WorkerMaster::add_dynamic_cut	(	Point const &	s,
		double const &	sx0,
		double const &	rhs
	)		const

Add benders cut to a problem.

Parameters

s	: optimal slave variables
sx0	: subgradient times x0
rhs	: optimal slave value

addSubproblemCut()

void WorkerMaster::addSubproblemCut	(	int	i,
		Point const &	s,
		Point const &	x_cut,
		double const &	rhs
	)		const

Add one benders cut to a problem.

Parameters

i	: identifier of a subproblem
s	: optimal slave variables
x_cut	: optimal Master variables
rhs	: optimal slave value

fix_alpha()

void WorkerMaster::fix_alpha

(

double const &

bestUB

)

const

Fix an upper bound and the variable overall_subpb_cost_under_approx of a problem.

Parameters

bestUB

: bound to fix

get()

void WorkerMaster::get	(	Point &	x_out,
		double &	overall_subpb_cost_under_approx,
		DblVector &	single_subpb_costs_under_approx
	)

Return optimal variables of a problem.

Set optimal variables of a problem which has the form (min(x,overall_subpb_cost_under_approx) : f(x) + overall_subpb_cost_under_approx)

Parameters

x_out	: reference to an empty map list
overall_subpb_cost_under_approx	: reference to an empty double

get_dual_values()

void WorkerMaster::get_dual_values

(

std::vector< double > &

dual

)

const

Set dual values of a problem in a vector.

Parameters

dual	: reference to a vector of double

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The documentation for this class was generated from the following files:

• src/cpp/benders/benders_core/include/WorkerMaster.h
• src/cpp/benders/benders_core/WorkerMaster.cpp