Class for storing logger messages. More...

#include <logger.hh>

Inheritance diagram for Logger:

Collaboration diagram for Logger:

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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::stringstream &scr_stream)
	Print header to screen stream, helper method called from `print_to_screen`. More...

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

std::string	compact_file_name (std::string file_name)
	Return compact (relative) path to the given source 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)

template<class T >
Logger &	operator<< (Logger &log, const std::vector< T > &vec)

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 keys '" << keys_vec << "'." << "\n";
LogOut() << "Write output to output stream: " << this->_base_filename << " for time: " << time << "\n";
DebugOut() << "Calling 'initialize' of empty equation '" << typeid(*this).name() << "'." << "\n";

See that output of vectors of printable objects is supported. Implementation of Logger does not support manipulator std::endl. Please, use "\n" instead. New line character "\n" can be used multiple times.

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());

Messages are printed only on the zero MPI process by default. Parallel output on all processes must be required explicitly:

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

Definition at line 135 of file logger.hh.

Member Enumeration Documentation

◆ MsgType

enum Logger::MsgType

Enum of types of Logger messages.

Rules:

Warning and Error are the only messages that goes to CERR.
All messages goes to the log file unless it is suppressed by the _no_log option if the user provides empty log file name.
If the log file was not initialized YET all LOG output goes to COUT unless it already goes to CERR.
'message' goes to the COUT if LOG is suppressed.
'debug' goes to both COUT and LOG, but are suppresed by FLOW123D_DEBUG.

Enumerator
warning
message
log
debug
error

Definition at line 150 of file logger.hh.

Constructor & Destructor Documentation

◆ Logger()

Logger::Logger ( MsgType type )

Constructor.

Definition at line 64 of file logger.cc.

◆ ~Logger()

Logger::~Logger ( )

Destructor.

Definition at line 75 of file logger.cc.

Member Function Documentation

◆ compact_file_name()

std::string Logger::compact_file_name ( std::string file_name )

private

Return compact (relative) path to the given source file.

Definition at line 230 of file logger.cc.

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◆ every_proc()

Logger & Logger::every_proc ( )

Set flag every_process_ to true.

Definition at line 110 of file logger.cc.

◆ fmt()

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 176 of file logger.hh.

◆ msg_type_string()

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 85 of file logger.cc.

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◆ print_file_header()

void Logger::print_file_header ( std::stringstream & file_stream )

private

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

Definition at line 259 of file logger.cc.

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◆ print_screen_header()

bool Logger::print_screen_header ( std::stringstream & scr_stream )

private

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

Definition at line 240 of file logger.cc.

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◆ print_to_file()

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 200 of file logger.cc.

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◆ print_to_screen()

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 172 of file logger.cc.

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◆ set_context()

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 99 of file logger.cc.

◆ set_mask()

void Logger::set_mask ( )

private

Set streams_mask_ according to the type of message.

Definition at line 118 of file logger.cc.

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Friends And Related Function Documentation

◆ operator<< [1/4]

template<class T >

Logger& operator<<	(	Logger &	log,
		const std::vector< T > &	vec
	)

friend

Definition at line 242 of file logger.hh.

◆ operator<< [2/4]

template<class T >

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

friend

Definition at line 259 of file logger.hh.

◆ operator<< [3/4]

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

friend

Definition at line 291 of file logger.cc.

◆ operator<< [4/4]

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

friend

implementation of operators

Definition at line 281 of file logger.cc.

Member Data Documentation

◆ cerr_stream_

std::stringstream Logger::cerr_stream_

private

Store messages printed to cerr output stream.

Definition at line 209 of file logger.hh.

◆ cout_stream_

std::stringstream Logger::cout_stream_

private

Store messages printed to cout output stream.

Definition at line 208 of file logger.hh.

◆ date_time_

std::string Logger::date_time_

private

Actual date and time.

Definition at line 217 of file logger.hh.

◆ every_process_

bool Logger::every_process_

private

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

Definition at line 213 of file logger.hh.

◆ file_name_

std::string Logger::file_name_

private

Actual file.

Definition at line 214 of file logger.hh.

◆ file_stream_

std::stringstream Logger::file_stream_

private

Store messages printed to file.

Definition at line 210 of file logger.hh.

◆ full_streams_mask_

StreamMask Logger::full_streams_mask_

private

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

Definition at line 220 of file logger.hh.

◆ function_

std::string Logger::function_

private

Actual function.

Definition at line 215 of file logger.hh.

◆ line_

int Logger::line_

private

Actual line.

Definition at line 216 of file logger.hh.

◆ mpi_rank_

int Logger::mpi_rank_

private

Actual process (if MPI is supported)

Definition at line 218 of file logger.hh.

◆ streams_mask_

StreamMask Logger::streams_mask_

private

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

Definition at line 219 of file logger.hh.

◆ type_

MsgType Logger::type_

private

Type of message.

Definition at line 212 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

◆ MsgType

Constructor & Destructor Documentation

◆ Logger()

◆ ~Logger()

Member Function Documentation

◆ compact_file_name()

◆ every_proc()

◆ fmt()

◆ msg_type_string()

◆ print_file_header()

◆ print_screen_header()

◆ print_to_file()

◆ print_to_screen()

◆ set_context()

◆ set_mask()

Friends And Related Function Documentation

◆ operator<< [1/4]

◆ operator<< [2/4]

◆ operator<< [3/4]

◆ operator<< [4/4]

Member Data Documentation

◆ cerr_stream_

◆ cout_stream_

◆ date_time_

◆ every_process_

◆ file_name_

◆ file_stream_

◆ full_streams_mask_

◆ function_

◆ line_

◆ mpi_rank_

◆ streams_mask_

◆ type_