#include <ULogger.h>

Inheritance diagram for ULogger:

Public Types
enum	Level { kDebug, kInfo, kWarning, kError, kFatal }

enum	Type { kTypeNoLog, kTypeConsole, kTypeFile }

Static Public Member Functions
static ULogger::Level	eventLevel ()

static ULogger::Level	exitLevel ()

static void	flush ()

static int	getTime (std::string &timeStr)

static bool	isBuffered ()

static bool	isPrintColored ()

static bool	isPrintEndLine ()

static bool	isPrintLevel ()

static bool	isPrintTime ()

static bool	isPrintWhere ()

static bool	isPrintWhereFullPath ()

static ULogger::Level	level ()

static void	reset ()

static void	setBuffered (bool buffered)

static void	setEventLevel (ULogger::Level eventSentLevel)

static void	setExitLevel (ULogger::Level exitLevel)

static void	setLevel (ULogger::Level level)

static void	setPrintColored (bool printColored)

static void	setPrintEndline (bool printEndline)

static void	setPrintLevel (bool printLevel)

static void	setPrintTime (bool printTime)

static void	setPrintWhere (bool printWhere)

static void	setPrintWhereFullPath (bool printWhereFullPath)

static void	setType (Type type, const std::string &fileName=kDefaultLogFileName, bool append=true)

static Type	type ()

static void	write (const char *msg,...)

static void	write (ULogger::Level level, const char file, int line, const char function, const char *msg,...)

Static Public Attributes
static const std::string	kDefaultLogFileName = "./ULog.txt"

Protected Member Functions
void	_flush ()

	ULogger ()

virtual	~ULogger ()

Static Protected Member Functions
static ULogger *	getInstance ()

Static Protected Attributes
static bool	append_ = true

static std::string	logFileName_

Private Member Functions
virtual void	_write (const char *msg, va_list arg)

virtual void	_writeStr (const char *msg)

Static Private Member Functions
static ULogger *	createInstance ()

Static Private Attributes
static bool	buffered_ = false

static std::string	bufferedMsgs_

static UDestroyer< ULogger >	destroyer_

static Level	eventLevel_ = kFatal

static bool	exitingState_ = false

static Level	exitLevel_ = kFatal

static ULogger *	instance_ = 0

static Level	level_ = kWarning

static const char *	levelName_ [5] = {"DEBUG", " INFO", " WARN", "ERROR", "FATAL"}

static bool	limitWhereLength_ = false

static UMutex	loggerMutex_

static bool	printColored_ = true

static bool	printEndline_ = true

static bool	printLevel_ = true

static bool	printTime_ = true

static bool	printWhere_ = true

static bool	printWhereFullPath_ = false

static Type	type_ = ULogger::kTypeConsole

Friends
class	UDestroyer< ULogger >

Detailed Description

This class is used to log messages with time on a console, in a file and/or with an event. At the start of the application, call ULogger::setType() with the type of the logger you want (see ULogger::Type, the type of the output can be changed at the run-time.). To use it, simply call the convenient macros UDEBUG(), UINFO(), UWARN(), UERROR(), UFATAL() depending of the severity of the message. You can disable some messages by setting the logger level ULogger::setLevel() to severity you want, defined by ULogger::Level. A fatal message will make the application to exit, printing the message on console (whatever the logger type) and posting a ULogEvent (synchronously... see UEventsManager::post()) before exiting.

The display of the logged messages can be modified:

If you don't want the level label, set ULogger::setPrintLevel() to false.
If you don't want the time label, set ULogger::setPrintTime() to false.
If you don't want the end of line added, set ULogger::setPrintEndline() to false.
If you don't the full path of the message, set ULogger::setPrintWhereFullPath() to false.
If you don't the path of the message, set ULogger::setPrintWhere() to false.

When using a file logger (kTypeLogger), it can be useful in some application to buffer messages before writing them to hard drive (avoiding hard drive latencies). You can set ULogger::setBuffered() to true to do that. When the buffered messages will be written to file on appllciation exit (ULogger destructor) or when ULogger::flush() is called.

If you want the application to exit on a lower severity level than kFatal, you can set ULogger::setExitLevel() to any ULogger::Type you want.

Example:

#include <utilite/ULogger.h>
int main(int argc, char * argv[])
{
   // Set the logger type. The choices are kTypeConsole,
   // kTypeFile or kTypeNoLog (nothing is logged).
   ULogger::setType(ULogger::kTypeConsole);
   // Set the logger severity level (kDebug, kInfo, kWarning, kError, kFatal).
   // All log entries under the severity level are not logged. Here,
   // only debug messages are not logged.
   ULogger::setLevel(ULogger::kInfo);
   // Use a predefined Macro to easy logging. It can be
   // called anywhere in the application as the logger is
   // a Singleton.
   UDEBUG("This message won't be logged because the "
          "severity level of the logger is set to kInfo.");
   UINFO("This message is logged.");
   UWARN("A warning message...");
   UERROR("An error message with code %d.", 42);
   return 0;
}

Output:

[ INFO] (2010-09-25 18:08:20) main.cpp:18::main() This message is logged.
[ WARN] (2010-09-25 18:08:20) main.cpp:20::main() A warning message...
[ERROR] (2010-09-25 18:08:20) main.cpp:22::main() An error message with code 42.

Another useful form of the ULogger is to use it with the UTimer class. Here an example:

#include <utilite/ULogger.h>
#include <utilite/UTimer.h>
...
UTimer timer; // automatically starts
// do some works for part A
UINFO("Time for part A = %f s", timer.ticks());
// do some works for part B
UINFO("Time for part B = %f s", timer.ticks());
// do some works for part C
UINFO("Time for part C = %f s", timer.ticks());
...

See also: setType(); setLevel(); UDEBUG(), UINFO(), UWARN(), UERROR(), UFATAL()

Definition at line 198 of file ULogger.h.

Member Enumeration Documentation

enum ULogger::Level

Logger levels, from lowest severity to highest:

kDebug, kInfo, kWarning, kError, kFatal

Enumerator
kDebug
kInfo
kWarning
kError
kFatal

Definition at line 221 of file ULogger.h.

enum ULogger::Type

Loggers available:

kTypeNoLog, kTypeConsole, kTypeFile

Enumerator
kTypeNoLog
kTypeConsole
kTypeFile

Definition at line 213 of file ULogger.h.

Constructor & Destructor Documentation

ULogger::ULogger ( )

inlineprotected

Definition at line 382 of file ULogger.h.

ULogger::~ULogger ( )

protectedvirtual

Definition at line 587 of file ULogger.cpp.

Member Function Documentation

void ULogger::_flush ( )

protected

Definition at line 241 of file ULogger.cpp.

virtual void ULogger::_write	(	const char *	msg,
		va_list	arg
	)

inlineprivatevirtual

Reimplemented in UFileLogger, and UConsoleLogger.

Definition at line 431 of file ULogger.h.

virtual void ULogger::_writeStr ( const char * msg )

inlineprivatevirtual

Reimplemented in UFileLogger, and UConsoleLogger.

Definition at line 432 of file ULogger.h.

ULogger * ULogger::createInstance ( )

staticprivate

Definition at line 572 of file ULogger.cpp.

static ULogger::Level ULogger::eventLevel ( )

inlinestatic

Definition at line 320 of file ULogger.h.

static ULogger::Level ULogger::exitLevel ( )

inlinestatic

Definition at line 311 of file ULogger.h.

void ULogger::flush ( )

static

Flush buffered messages.

See also: setBuffered()

Definition at line 228 of file ULogger.cpp.

ULogger * ULogger::getInstance ( )

staticprotected

Definition at line 563 of file ULogger.cpp.

int ULogger::getTime ( std::string & timeStr )

static

Get the time in the format "2008-7-13 12:23:44".

Parameters

timeStr string were the time will be copied.

Returns: the number of characters written, or 0 if an error occurred.

Definition at line 512 of file ULogger.cpp.

static bool ULogger::isBuffered ( )

inlinestatic

Definition at line 288 of file ULogger.h.

static bool ULogger::isPrintColored ( )

inlinestatic

Definition at line 265 of file ULogger.h.

static bool ULogger::isPrintEndLine ( )

inlinestatic

Definition at line 257 of file ULogger.h.

static bool ULogger::isPrintLevel ( )

inlinestatic

Definition at line 250 of file ULogger.h.

static bool ULogger::isPrintTime ( )

inlinestatic

Definition at line 243 of file ULogger.h.

static bool ULogger::isPrintWhere ( )

inlinestatic

Definition at line 272 of file ULogger.h.

static bool ULogger::isPrintWhereFullPath ( )

inlinestatic

Definition at line 279 of file ULogger.h.

static ULogger::Level ULogger::level ( )

inlinestatic

Definition at line 302 of file ULogger.h.

void ULogger::reset ( )

static

Reset to default parameters.

Definition at line 203 of file ULogger.cpp.

void ULogger::setBuffered ( bool buffered )

static

Set is the logger buffers messages, default false. When true, the messages are buffered until the application is closed or ULogger::flush() is called.

See also: ULogger::flush()

Parameters

buffered true to buffer messages, otherwise set to false.

Definition at line 218 of file ULogger.cpp.

static void ULogger::setEventLevel ( ULogger::Level eventSentLevel )

inlinestatic

An ULogEvent is sent on each message logged at the specified level. Note : On message with level >= exitLevel, the event is sent synchronously (see UEventsManager::post()).

See also: ULogEvent; setExitLevel()

Definition at line 319 of file ULogger.h.

static void ULogger::setExitLevel ( ULogger::Level exitLevel )

inlinestatic

Make application to exit when a log with level is written (useful for debugging). The message is printed to console (whatever the logger type) and an ULogEvent is sent (synchronously... see UEventsManager::post()) before exiting.

Note : A kFatal level will always exit whatever the level specified here.

Definition at line 310 of file ULogger.h.

static void ULogger::setLevel ( ULogger::Level level )

inlinestatic

Set logger level: default kInfo. All messages over the severity set are printed, other are ignored. The severity is from the lowest to highest:

kDebug
kInfo
kWarning
kError
kFatal
Parameters

level the minimum level of the messages printed.

Definition at line 301 of file ULogger.h.

static void ULogger::setPrintColored ( bool printColored )

inlinestatic

Print text with color: default true. Dark green for Debug, white for Info, yellow for Warning, red for Error and Fatal.

Parameters

printColored true to print text with color, otherwise set to false.

Definition at line 264 of file ULogger.h.

static void ULogger::setPrintEndline ( bool printEndline )

inlinestatic

Print end of line: default true.

Parameters

printLevel true to print end of line, otherwise set to false.

Definition at line 256 of file ULogger.h.

static void ULogger::setPrintLevel ( bool printLevel )

inlinestatic

Print level: default true.

Parameters

printLevel true to print level, otherwise set to false.

Definition at line 249 of file ULogger.h.

static void ULogger::setPrintTime ( bool printTime )

inlinestatic

Print time: default true.

Parameters

printTime true to print time, otherwise set to false.

Definition at line 242 of file ULogger.h.

static void ULogger::setPrintWhere ( bool printWhere )

inlinestatic

Print where is this message in source code: default true.

Parameters

printWhere true to print where, otherwise set to false.

Definition at line 271 of file ULogger.h.

static void ULogger::setPrintWhereFullPath ( bool printWhereFullPath )

inlinestatic

Print the full path: default true. ULogger::setPrintWhere() must be true to have path printed.

Parameters

printWhereFullPath true to print the full path, otherwise set to false.

Definition at line 278 of file ULogger.h.

void ULogger::setType	(	Type	type,
		const std::string &	fileName = `kDefaultLogFileName`,
		bool	append = `true`
	)

static

Set the type of the logger. When using kTypeFile, the parameter "fileName" would be changed (default is "./ULog.txt"), and optionally "append" if we want the logger to append messages to file or to overwrite the file.

Parameters

type	the ULogger::Type of the logger.
fileName	file name used with a file logger type.
append	if true, the file isn't overwritten, otherwise it is.

TODO : Can it be useful to have 2 or more types at the same time ? Print in console and file at the same time.

Definition at line 175 of file ULogger.cpp.

static Type ULogger::type ( )

inlinestatic

Definition at line 235 of file ULogger.h.

void ULogger::write	(	const char *	msg,
			...
	)

static

Write a message directly to logger without level handling.

Parameters

msg	the message to write.
...	the variable arguments

Deprecated:: use UDEBUG(), UINFO(), UWARN(), UERROR() or UFATAL()

Definition at line 247 of file ULogger.cpp.

void ULogger::write	(	ULogger::Level	level,
		const char *	file,
		int	line,
		const char *	function,
		const char *	msg,
			...
	)

static

Definition at line 307 of file ULogger.cpp.

Friends And Related Function Documentation

friend class UDestroyer< ULogger >

friend

Definition at line 402 of file ULogger.h.

Member Data Documentation

bool ULogger::append_ = true

staticprotected

Definition at line 412 of file ULogger.h.

bool ULogger::buffered_ = false

staticprivate

Definition at line 523 of file ULogger.h.

std::string ULogger::bufferedMsgs_

staticprivate

Definition at line 525 of file ULogger.h.

UDestroyer< ULogger > ULogger::destroyer_

staticprivate

Definition at line 443 of file ULogger.h.

ULogger::Level ULogger::eventLevel_ = kFatal

staticprivate

Definition at line 510 of file ULogger.h.

bool ULogger::exitingState_ = false

staticprivate

Definition at line 533 of file ULogger.h.

ULogger::Level ULogger::exitLevel_ = kFatal

staticprivate

Definition at line 505 of file ULogger.h.

ULogger * ULogger::instance_ = 0

staticprivate

Definition at line 438 of file ULogger.h.

const std::string ULogger::kDefaultLogFileName = "./ULog.txt"

static

The default log file name.

Definition at line 205 of file ULogger.h.

ULogger::Level ULogger::level_ = kWarning

staticprivate

Definition at line 499 of file ULogger.h.

const char * ULogger::levelName_ = {"DEBUG", " INFO", " WARN", "ERROR", "FATAL"}

staticprivate

Definition at line 512 of file ULogger.h.

bool ULogger::limitWhereLength_ = false

staticprivate

Definition at line 489 of file ULogger.h.

std::string ULogger::logFileName_

staticprotected

Definition at line 407 of file ULogger.h.

UMutex ULogger::loggerMutex_

staticprivate

Definition at line 517 of file ULogger.h.

bool ULogger::printColored_ = true

staticprivate

Definition at line 467 of file ULogger.h.

bool ULogger::printEndline_ = true

staticprivate

Definition at line 461 of file ULogger.h.

bool ULogger::printLevel_ = true

staticprivate

Definition at line 455 of file ULogger.h.

bool ULogger::printTime_ = true

staticprivate

Definition at line 449 of file ULogger.h.

bool ULogger::printWhere_ = true

staticprivate

Definition at line 473 of file ULogger.h.

bool ULogger::printWhereFullPath_ = false

staticprivate

Definition at line 481 of file ULogger.h.

ULogger::Type ULogger::type_ = ULogger::kTypeConsole

staticprivate

Definition at line 494 of file ULogger.h.

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

Public Types

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Static Protected Member Functions

Static Protected Attributes

Private Member Functions

Static Private Member Functions

Static Private Attributes

Friends

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation