DataAccess Class Reference

#include <dataaccess.h>

Inheritance diagram for DataAccess:

Collaboration diagram for DataAccess:

Public Member Functions
	DataAccess (IDataSource *ds) noexcept
Err	add_variable (const Variable &var) noexceptoverride
	add_variable add a new variable. More...
Err	add_variable_value (const VarValue &var) noexceptoverride
	add_variable_value add a new value for a given variable. More...
std::tuple< std::vector< Variable >, Err >	fetch_variables () noexceptoverride
	fetch_variables get all variables. More...
std::tuple< std::vector< VarValue >, Err >	fetch_variable_values (const std::string &var_name, size_t max_len) noexceptoverride
	fetch_variable_values get values for a given variable. More...
std::tuple< std::vector< VarValue >, Err >	fetch_variable_values (const std::string &var_name, const std::chrono::system_clock::time_point &start_date, const std::chrono::system_clock::time_point &end_date, size_t max_len) noexceptoverride
	fetch_variable_values get values for a given variable in a period. More...
Err	compress (const std::vector< VarValue > &in_vals, std::vector< VarValue > *out_vals, size_t max_len) noexcept
	compress a dumy compression algorithm More...
Public Member Functions inherited from IDataAccess
	IDataAccess () noexcept=default
virtual	~IDataAccess ()=default
	IDataAccess (const IDataAccess &)=delete
IDataAccess &	operator= (const IDataAccess &)=delete
	IDataAccess (IDataAccess &&)=default
IDataAccess &	operator= (IDataAccess &&)=default

Private Attributes
IDataSource *	ds_

Additional Inherited Members
Public Types inherited from IDataAccess
enum	Err { Err::Ok, Err::Failed, Err::InvalidArgument }

Constructor & Destructor Documentation

DataAccess::DataAccess ( IDataSource *  ds )

explicitnoexcept

Member Function Documentation

IDataAccess::Err DataAccess::add_variable ( const Variable &  var )

overridevirtualnoexcept

add_variable add a new variable.

Parameters

var	variable info.

Returns

Ok on success.

See also

IDataAccess::add_variable

Implements IDataAccess.

IDataAccess::Err DataAccess::add_variable_value ( const VarValue &  var )

overridevirtualnoexcept

add_variable_value add a new value for a given variable.

Parameters

var	variable value.

Returns

Ok on success.

See also

IDataAccess::add_variable_value

Implements IDataAccess.

IDataAccess::Err DataAccess::compress ( const std::vector< VarValue > &  in_vals, std::vector< VarValue > *  out_vals, size_t  max_len  )

noexcept

compress a dumy compression algorithm

Parameters

in_vals	input values.
out_vals	output(compressed) values.
max_len	len of the compressed values.

Returns

Err::Ok on success.

std::tuple< std::vector< VarValue >, IDataAccess::Err > DataAccess::fetch_variable_values ( const std::string &  var_name, size_t  max_len  )

overridevirtualnoexcept

fetch_variable_values get values for a given variable.

Parameters

var_name	variable name.
max_len	TODO(denis.nosp@m.acos.nosp@m.taq@g.nosp@m.mail.nosp@m..com): not implemented yet

Returns

a vector of values if any and an error code.

See also

IDataAccess::fetch_variable_values

Implements IDataAccess.

std::tuple< std::vector< VarValue >, IDataAccess::Err > DataAccess::fetch_variable_values ( const std::string &  var_name, const std::chrono::system_clock::time_point &  start_date, const std::chrono::system_clock::time_point &  end_date, size_t  max_len  )

overridevirtualnoexcept

fetch_variable_values get values for a given variable in a period.

Parameters

var	variable value.
start_date	start date.
end_date	end date
max_len	TODO(denis.nosp@m.acos.nosp@m.taq@g.nosp@m.mail.nosp@m..com): not implemented yet

Returns

a vector of values if any and an error code.

See also

IDataAccess::fetch_variable_values

Implements IDataAccess.

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std::tuple< std::vector< Variable >, IDataAccess::Err > DataAccess::fetch_variables ( )

overridevirtualnoexcept

fetch_variables get all variables.

Returns

a vector with the variables.

See also

IDataSource::add_variable

Implements IDataAccess.

Member Data Documentation

IDataSource* DataAccess::ds_

private

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

• /home/travis/build/denisacostaq/DAQs/src/database-server/data-access/dataaccess.h
• /home/travis/build/denisacostaq/DAQs/src/database-server/data-access/dataaccess.cc