WorkerMaster Class Reference

Inheritance diagram for WorkerMaster:

Public Member Functions
	WorkerMaster (const VariableMap &variable_map, const std::string &solver_name, int log_level, int subproblems_count, SolverLogManager &solver_log_manager, bool mps_has_alpha, Logger logger, ProblemsFormat format, IBendersProblemProvider *benders_problem_provider, double master_solution_tolerance, double cut_coefficient_tolerance)
	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 (const Point &s, const Point &x0, const double &rhs) const
	Add benders cut to a problem.
void	add_cut_by_iter (int i, const Point &s, const double &sx0, const double &rhs) const
	Add benders cut to a problem.
void	add_dynamic_cut (const Point &s, const double &sx0, const double &rhs) const
	Add benders cut to a problem.
void	addSubproblemCut (int i, const Point &subgradient, const Point &x0, const double &rhs) const
	Add one benders cut to a problem.
void	fix_alpha (const double &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_int_vars () const
void	set_id_alpha (double id_alpha)
void	set_id_single_subpb_costs_under_approx (std::vector< int > id_single_subpb_costs_under_approx)
Public Member Functions inherited from Worker
	Worker (VariableMap variable_map, Logger logger, double cut_coefficient_tolerance)
void	init (const std::string &solver_name, int log_level, const SolverLogManager &solver_log_manager, ProblemsFormat format, IBendersProblemProvider *benders_problem_provider)
	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 std::shared_ptr< SolverAbstract >	solver () const
void	solve (int &lp_status, const std::string &outputroot, const std::string &output_master_mps_file_name, std::shared_ptr< Output::OutputWriter > 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 (const std::vector< char > &qrtype_p, const std::vector< double > &rhs_p, const std::vector< double > &range_p, const std::vector< int > &mstart_p, const std::vector< int > &mclind_p, const std::vector< double > &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	_base_filename
VariableMap	_name_to_id
Int2Str	_id_to_name
std::shared_ptr< SolverAbstract >	_solver = nullptr
bool	_is_master = false
Logger	logger_
Protected Member Functions inherited from Worker
void	roundIfWithinTolerance (std::vector< double > &values, int first, int last) const

Constructor & Destructor Documentation

WorkerMaster()

WorkerMaster::WorkerMaster	(	const VariableMap &	variable_map,
		const std::string &	solver_name,
		int	log_level,
		int	subproblems_count,
		SolverLogManager &	solver_log_manager,
		bool	mps_has_alpha,
		Logger	logger,
		ProblemsFormat	format,
		IBendersProblemProvider *	benders_problem_provider,
		double	master_solution_tolerance,
		double	cut_coefficient_tolerance )

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	(	const Point &	s,
		const Point &	x_cut,
		const double &	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	i,
		const Point &	s,
		const double &	sx0,
		const double &	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	(	const Point &	s,
		const double &	sx0,
		const double &	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,
		const Point &	subgradient,
		const Point &	x_cut,
		const double &	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

(

const double &

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/antares-xpansion/benders/benders_core/WorkerMaster.h
• src/cpp/benders/benders_core/WorkerMaster.cpp