Class for storing logger messages. More...

#include <logger.hh>

Inheritance diagram for Logger:

Collaboration diagram for Logger:

Public Types
enum	MsgType { warning = 0, message = 1, log = 2, debug = 3, error = 4 }
	Enum of types of Logger messages. More...

Public Member Functions
	Logger (MsgType type)
	Constructor. More...

Logger &	set_context (const char file_name, const char function, const int line)
	Stores values for printing out line number, function, etc. More...

Logger &	every_proc ()
	Set flag every_process_ to true. More...

template<class... T>
Logger &	fmt (T &&...t)
	Allow use functionality of fmtlib for formating message. More...

	~Logger ()
	Destructor. More...

Static Public Member Functions
static const std::string	msg_type_string (MsgType msg_type, bool full_format=true)
	Return string value of given MsgType in full or shorter format (e.g. "WARNING" of "Wrn") More...

Private Member Functions
void	set_mask ()
	Set `streams_mask_` according to the type of message. More...

void	print_to_screen (std::ostream &stream, std::stringstream &scr_stream, StreamMask mask)
	Print formated message to given screen stream if mask corresponds with `streams_mask_`. More...

void	print_to_file (std::ofstream &stream, std::stringstream &file_stream, StreamMask mask)
	Print formated message to given file stream if mask corresponds with `streams_mask_`. More...

bool	print_screen_header (std::ostream &stream, std::stringstream &scr_stream)
	Print header to screen stream, helper method called from `print_to_screen`. More...

void	print_file_header (std::ofstream &stream, std::stringstream &file_stream)
	Print header to file stream, helper method called from `print_to_file`. More...

Private Attributes
std::stringstream	cout_stream_
	Store messages printed to cout output stream. More...

std::stringstream	cerr_stream_
	Store messages printed to cerr output stream. More...

std::stringstream	file_stream_
	Store messages printed to file. More...

MsgType	type_
	Type of message. More...

bool	every_process_
	Flag marked if log message is printing for all processes or only for zero process. More...

std::string	file_name_
	Actual file. More...

std::string	function_
	Actual function. More...

int	line_
	Actual line. More...

std::string	date_time_
	Actual date and time. More...

int	mpi_rank_
	Actual process (if MPI is supported) More...

StreamMask	streams_mask_
	Mask of logger, specifies streams in actual time into which to be written. More...

StreamMask	full_streams_mask_
	Mask of logger, specifies all streams into which to be written in logger message. More...

Friends
template<class T >
Logger &	operator<< (Logger &log, const T &x)

Logger &	operator<< (Logger &log, std::ostream &(*pf)(std::ostream &))

Logger &	operator<< (Logger &log, StreamMask mask)

Detailed Description

Class for storing logger messages.

Allow define different levels of log messages and distinguish output streams for individual leves. These output streams are -

standard console output (std::cout)
standard error output (std::cerr)
file output (see LoggerOptions class)

Logger distinguishes four type of levels -

warning: printed to standard error and file output
message: printed to standard console and file output
log: printed to file output
debug: printed to file output (level is used only in debug mode)

File output is optional. See LoggerOptions for setting this output stream.

Example of Logger usage:

For individual levels are defined macros -

MessageOut()
WarningOut()
LogOut()
DebugOut() that ensure display of actual code point (source file, line and function).

Logger message is created by using an operator << and allow to add each type that has override this operator. Message is terminated with manipulator std::endl. Implicitly logger message is printed only in processor with rank zero. If necessary printed message for all process, it provides a method every_proc().

Examples of logger messages formating:

MessageOut() << "End of simulation at time: " << secondary_eq->solved_time() << "\n";
WarningOut() << "Unprocessed key '" << key_name << "' in Record '" << rec->type_name() << "'." << "\n";
LogOut() << "Write output to output stream: " << this->_base_filename << " for time: " << time << "\n";
DebugOut() << "Calling 'initialize' of empty equation '" << typeid(*this).name() << "'." << "\n";

Logger message can be created by more than one line ("\n" can be used multiple times):

MessageOut() << "Start time: " << this->start_time() << "\n" << "End time: " << this->end_time() << "\n";

Or Logger allow using fmtlib functionality for simpler formatting of message:

MessageOut() << fmt::format("Start time: {}\nEnd time: {}\n", this->start_time(), this->end_time());

MessageOut().fmt("Start time: {}\nEnd time: {}\n", this->start_time(), this->end_time());

In some cases message can be printed for all processes:

MessageOut().every_proc() << "Size distributed at process: " << distr->lsize() << "\n";

Implementation of Logger does not support manipulator std::endl. Please, use "\n" instead.

Definition at line 134 of file logger.hh.

Member Enumeration Documentation

enum Logger::MsgType

Enum of types of Logger messages.

Enumerator
warning
message
log
debug
error

Definition at line 137 of file logger.hh.

Constructor & Destructor Documentation

Logger::Logger ( MsgType type )

Constructor.

Definition at line 65 of file logger.cc.

Logger::~Logger ( )

Destructor.

Definition at line 76 of file logger.cc.

Member Function Documentation

Logger & Logger::every_proc ( )

Set flag every_process_ to true.

Definition at line 111 of file logger.cc.

template<class... T>

Logger& Logger::fmt ( T &&... t )

inline

Allow use functionality of fmtlib for formating message.

See examples in description of Logger class.

Definition at line 163 of file logger.hh.

const std::string Logger::msg_type_string	(	MsgType	msg_type,
		bool	full_format = `true`
	)

static

Return string value of given MsgType in full or shorter format (e.g. "WARNING" of "Wrn")

Definition at line 86 of file logger.cc.

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void Logger::print_file_header	(	std::ofstream &	stream,
		std::stringstream &	file_stream
	)

private

Print header to file stream, helper method called from print_to_file.

Definition at line 242 of file logger.cc.

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bool Logger::print_screen_header	(	std::ostream &	stream,
		std::stringstream &	scr_stream
	)

private

Print header to screen stream, helper method called from print_to_screen.

Definition at line 222 of file logger.cc.

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void Logger::print_to_file	(	std::ofstream &	stream,
		std::stringstream &	file_stream,
		StreamMask	mask
	)

private

Print formated message to given file stream if mask corresponds with streams_mask_.

Definition at line 195 of file logger.cc.

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void Logger::print_to_screen	(	std::ostream &	stream,
		std::stringstream &	scr_stream,
		StreamMask	mask
	)

private

Print formated message to given screen stream if mask corresponds with streams_mask_.

Definition at line 169 of file logger.cc.

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Logger & Logger::set_context	(	const char *	file_name,
		const char *	function,
		const int	line
	)

Stores values for printing out line number, function, etc.

Definition at line 100 of file logger.cc.

void Logger::set_mask ( )

private

Set streams_mask_ according to the type of message.

Definition at line 119 of file logger.cc.

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Friends And Related Function Documentation

template<class T >

Logger& operator<<	(	Logger &	log,
		const T &	x
	)

friend

Definition at line 216 of file logger.hh.

Logger& operator<<	(	Logger &	log,
		std::ostream &(*)(std::ostream &)	pf
	)

friend

Definition at line 279 of file logger.cc.

Logger& operator<<	(	Logger &	log,
		StreamMask	mask
	)

friend

implementation of operators

Definition at line 269 of file logger.cc.

Member Data Documentation

std::stringstream Logger::cerr_stream_

private

Store messages printed to cerr output stream.

Definition at line 189 of file logger.hh.

std::stringstream Logger::cout_stream_

private

Store messages printed to cout output stream.

Definition at line 188 of file logger.hh.

std::string Logger::date_time_

private

Actual date and time.

Definition at line 197 of file logger.hh.

bool Logger::every_process_

private

Flag marked if log message is printing for all processes or only for zero process.

Definition at line 193 of file logger.hh.

std::string Logger::file_name_

private

Actual file.

Definition at line 194 of file logger.hh.

std::stringstream Logger::file_stream_

private

Store messages printed to file.

Definition at line 190 of file logger.hh.

StreamMask Logger::full_streams_mask_

private

Mask of logger, specifies all streams into which to be written in logger message.

Definition at line 200 of file logger.hh.

std::string Logger::function_

private

Actual function.

Definition at line 195 of file logger.hh.

int Logger::line_

private

Actual line.

Definition at line 196 of file logger.hh.

int Logger::mpi_rank_

private

Actual process (if MPI is supported)

Definition at line 198 of file logger.hh.

StreamMask Logger::streams_mask_

private

Mask of logger, specifies streams in actual time into which to be written.

Definition at line 199 of file logger.hh.

MsgType Logger::type_

private

Type of message.

Definition at line 192 of file logger.hh.

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

/opt/flow123d/flow123d/src/system/logger.hh
/opt/flow123d/flow123d/src/system/logger.cc

Public Types

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Friends

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation