COutputLogger.h

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2017, Individual contributors, see AUTHORS file     |
   | See: http://www.mrpt.org/Authors - All rights reserved.                |
   | Released under BSD License. See details in http://www.mrpt.org/License |
   +------------------------------------------------------------------------+ */

#ifndef COUTPUTLOGGER_H
#define COUTPUTLOGGER_H

#include <mrpt/utils/mrpt_macros.h>
#include <mrpt/utils/TEnumType.h>
#include <mrpt/system/os.h>  // for console color constants
#include <mrpt/utils/CTicTac.h>

#include <string>
#include <deque>
#include <mrpt/system/datetime.h>
#include <sstream>
#include <set>

namespace mrpt
{
namespace utils
{
class CStream;  // frwd decl

/** \brief Enumeration of available verbosity levels. \sa COutputLogger */
enum VerbosityLevel
{
        LVL_DEBUG = 0,
        LVL_INFO,
        LVL_WARN,
        LVL_ERROR,
        // ------------
        NUMBER_OF_VERBOSITY_LEVELS
};

/** Callback types for use with mrpt::utils::COuputLogger */
typedef void (*output_logger_callback_t)(
        const std::string& msg, const mrpt::utils::VerbosityLevel level,
        const std::string& loggerName, const mrpt::system::TTimeStamp timestamp,
        void* userParam);

/** \brief Versatile class for consistent logging and
 *        management of output messages
 *
 * COutputLogger is a versatile class for logging messages either to the
 * terminal window or to an external file. Class instances can take messages in
 * std::string using the logStr class methods. The following macros are also
 * provided
 * for usage within a class that inherits from COutputLogger:
 *
 * \code
 * // Plain strings:
 * MRPT_LOG_DEBUG("This will be shown only if verbosity level is LVL_DEBUG.");
 * MRPT_LOG_ERROR("This message will be always shown.");
 * // printf-like versions:
 * MRPT_LOG_ERROR_FMT("Out of range value: %i.", int_param);
 * // stream-like versions:
 * MRPT_LOG_ERROR_STREAM("Out of range value: " << int_param << " more vars: "
 * << other_var);
 * // Minimum period (in seconds) between messages:
 * MRPT_LOG_THROTTLE_DEBUG_STREAM(5.0, "Var=" << value << " foo=" << foo_var);
 * // Only once:
 * MRPT_LOG_ONCE_WARN("Notice: blah blah");
 * \endcode
 *
 * From outside of a class inheriting from COutputLogger the following
 * `MRPT_UNSCOPED_{START|END}` macros are provided:
 *
 *  \code
 *  MRPT_UNSCOPED_LOGGER_START;
 *  MRPT_LOG_WARN("blah");
 *  MRPT_LOG_ERROR_STREAM("error: " << strval);
 *  MRPT_UNSCOPED_LOGGER_END;
 *  \endcode
 *
 * - Logger instance keeps the messages in an internal container so that upon
 *   request it can dump them either to the console or to an external file
 *   altogether.
 * - The message, when printed in the terminal window, is **colored** according
 * to
 *   the logger's current verbosity/logging level (Logging level with which
 *   the underlying TMsg instance was instantiatedd).  The available verbosity
 *   levels as well as their corresponding colors are listed below:
 *
 *   + LVL_DEBUG => CONCOL_BLUE
 *   + LVL_INFO  => CONCOL_NORMAL
 *   + LVL_WARN  => CONCOL_GREEN
 *   + LVL_ERROR => CONCOL_RED
 *
 * - Logged messages are displayed in the screen if the current logger level is
 *   higher than m_min_verbosity_level (logger ignores those messages
 *   altogether). This can be used for filtering the output messages according
 *   to their importance (e.g. show only error messages by issuing
 *   setMinLoggingLevel(LVL_ERROR)).
 *   \sa setLoggingLevel, setMinLoggingLevel
 *
 *   Default logging level is LVL_INFO.
 *
 * User may receive callbacks whenever a message is displayed to console by
 * using
 * logRegisterCallback(). If for some reason the callbacks are not needed any
 * more,
 * use logDeregisterCallback() to stop receiving calls. This mechanism is useful
 * in case of showing the messages to a GUI, transmiting them to a remote
 * machine, etc.
 *
 * \note By default every logged message is going to be dumped to the standard
 * output as well (if VerbosityLevel > m_min_verbosity_level). Unset \b
 * logging_enable_console_output class variable if that's not the desired
 * behavior
 *
 * \note [New in MRPT 1.5.0]
 * \sa TMsg
 * \ingroup mrpt_base_grp
 */
class COutputLogger
{
   public:
        static mrpt::system::TConsoleColor logging_levels_to_colors
                [NUMBER_OF_VERBOSITY_LEVELS];  //! Map from VerbosityLevels to their
        //! corresponding
        //! mrpt::system::TConsoleColor. Handy
        //! for coloring the input based on the
        //! verbosity of the message
        /** Map from VerbosityLevels to their corresponding names. Handy for
         * printing the current message VerbosityLevel along with the actual content
         */
        static std::string logging_levels_to_names[NUMBER_OF_VERBOSITY_LEVELS];

        /** @name Logging methods
          * @{ */

        /**
         * \brief Construct a COutputLogger instance with the given name as the
         * instance name.
         *
         * Call to this constructor can be used instead of first initializing the
         * object and then explicitly setting the name like in the following case:
         * \code
         * COutputLogger a_logger;
         * a_logger.setLoggerName("logger_name");
         * \endcode
         */
        COutputLogger(const std::string& name);
        /** Default class constructor. Name of the logger is initialized to "logStr"
         */
        COutputLogger();
        /** virtual dtor (so we can derive classes from this one) */
        virtual ~COutputLogger();

        /** \brief Main method to add the specified message string to the logger.
         * \sa logCond, logFmt */
        void logStr(const VerbosityLevel level, const std::string& msg_str)
                const;  // renamed from log() to avoid conflict with math ::log()

        /** \brief Alternative logging method, which mimics the printf behavior.
         *
         * Handy for not having to first use mrpt::format to pass a std::string
         * message to logStr
         *
         * \code
         * // instead of:
         * logStr(mrpt::format("Today is the %d of %s, %d", 15, "July", 2016));
         *
         * // one can use:
         * logFmt("Today is the %d of %s, %d", 15, "July", 2016);
         * \endcode
         *
         * \sa logStr, logCond
         */
        void logFmt(const VerbosityLevel level, const char* fmt, ...) const
                MRPT_printf_format_check(3, 4);  // arg 1=this

        /** \brief Log the given message only if the condition is satisfied.
         *
         * \sa log, logFmt
         */
        void logCond(
                const VerbosityLevel level, bool cond,
                const std::string& msg_str) const;

        /** Set the name of the COutputLogger instance.  \sa getLoggerName */
        void setLoggerName(const std::string& name);
        /** Return the name of the COutputLogger instance.  \sa setLoggerName */
        std::string getLoggerName() const;

        /** \brief Set the *minimum* logging level for which the incoming logs are
         * going to be taken into account.
         *
         * String messages with specified VerbosityLevel smaller than the min, will
         * not be outputted to the screen and neither will a record of them be
         * stored in by the COutputLogger instance
         */
        void setMinLoggingLevel(const VerbosityLevel level);
        /** alias of setMinLoggingLevel() */
        void setVerbosityLevel(const VerbosityLevel level);

        /** \sa setMinLoggingLevel */
        VerbosityLevel getMinLoggingLevel() const { return m_min_verbosity_level; }
        bool isLoggingLevelVisible(VerbosityLevel level) const
        {
                return m_min_verbosity_level <= level;
        }

        /** Fill the provided string with the contents of the logger's history in
         * std::string representation */
        void getLogAsString(std::string& log_contents) const;
        /** Get the history of COutputLogger instance in a string representation. */
        std::string getLogAsString() const;

        /** \brief Write the contents of the COutputLogger instance to an external
         * file.
         *
         * Upon call to this method, COutputLogger dumps the contents of all the
         * logged commands so far to the specified external file.  By default the
         * filename is set to ${LOGGERNAME}.log except if the fname parameter is
         * provided
         *
         * \sa dumpToConsole, getAsString
         */
        void writeLogToFile(const std::string* fname_in = NULL) const;
        /** \brief Dump the current contents of the COutputLogger instance in the
         * terminal window.
         *
         * \sa writeToFile
         */
        void dumpLogToConsole() const;
        /** Return the last Tmsg instance registered in the logger history */
        std::string getLoggerLastMsg() const;
        /** Fill inputtted string with the contents of the last message in history
         */
        void getLoggerLastMsg(std::string& msg_str) const;
        /** Reset the contents of the logger instance. Called upon construction. */
        void loggerReset();

        /** [Default=true] Set it to false in case you don't want the logged
         * messages to be dumped to the output automatically. */
        bool logging_enable_console_output;
        /** [Default=false] Enables storing all messages into an internal list. \sa
         * writeLogToFile, getLogAsString */
        bool logging_enable_keep_record;

        void logRegisterCallback(
                output_logger_callback_t userFunc, void* userParam = NULL);
        void logDeregisterCallback(
                output_logger_callback_t userFunc, void* userParam = NULL);
        /** @} */

        struct TCallbackEntry
        {
                output_logger_callback_t func;
                void* userParam;

                bool operator<(
                        const mrpt::utils::COutputLogger::TCallbackEntry& e2) const
                {
                        return func < e2.func;
                }
                bool operator==(
                        const mrpt::utils::COutputLogger::TCallbackEntry& c2) const
                {
                        return func == c2.func && userParam == c2.userParam;
                }
        };

   protected:
        /** \brief Provided messages with VerbosityLevel smaller than this value
         * shall be ignored */
        VerbosityLevel m_min_verbosity_level;

   private:
        /**
         * \brief Struct responsible of holding information relevant to the message
         *        (in std::string form) issued by the user.
         *
         * Upon TMsg initialization, instance fetches the name of the caller
         * COutputLogger, as well as the VerbosityLevel and the
         * mrpt::system::TTimeStamp of the message provided.
         * The format of the message when this is printed / or written to an
         * external file complies is given below:
         *
         * <center><em> [name | level | timestamp:] body </em></center>
         */
        struct TMsg
        {
                /** \brief Class constructor that passes a message in std::string
                 * form as well as a reference to the COutputLogger that provided the
                 * current message
                 */
                TMsg(
                        const mrpt::utils::VerbosityLevel level, const std::string& msg,
                        const COutputLogger& logger);
                /** \brief  Default Destructor */
                ~TMsg();

                /** \brief Return a string representation of the underlying message */
                std::string getAsString() const;
                /** \brief Fill the string with the contents of the underlying message
                 * in
                 * string representation */
                void getAsString(std::string* contents) const;
                /** \brief Write the message contents to the specified stream
                 *
                 * \sa getAsString
                 */
                void writeToStream(mrpt::utils::CStream& out) const;
                /** \brief Dump the message contents to the standard output
                 *
                 * \sa writeToStream
                 */
                void dumpToConsole() const;
                /** \brief Reset the contents of the TMsg instance */
                void reset();

                // parameters of the message under construction
                mrpt::system::TTimeStamp timestamp; /**< Timestamp of the message. */
                VerbosityLevel level; /**< Verbosity level of the message. */
                std::string name; /**< Name of the COutputLogger instance that called
                                                         registered the message. */
                std::string body; /**< Actual content of the message. */
        };

        /** Helper method for generating a std::string instance from printf-like
         * arguments */
        std::string generateStringFromFormat(const char* fmt, va_list argp) const;

        std::string m_logger_name;
        mutable std::deque<TMsg>
                m_history;  // deque is better than vector to avoid memory reallocs

        std::set<TCallbackEntry> m_listCallbacks;
};

/** For use in MRPT_LOG_DEBUG_STREAM(), etc. */
struct COutputLoggerStreamWrapper
{
        COutputLoggerStreamWrapper(
                VerbosityLevel level, const COutputLogger& logger)
                : m_level(level), m_logger(logger)
        {
        }
        ~COutputLoggerStreamWrapper()
        {
                if (m_logger.isLoggingLevelVisible(m_level))
                        m_logger.logStr(m_level, m_str.str());
        }

        template <typename T>
        std::stringstream& operator<<(const T& val)
        {
                m_str << val;
                return m_str;
        }
        // Overload for std::stringstream objects
        std::stringstream& operator<<(const std::stringstream& val)
        {
                m_str << val.str();
                return m_str;
        }

   private:
        std::stringstream m_str;
        VerbosityLevel m_level;
        const COutputLogger& m_logger;
};

#define INTERNAL_MRPT_LOG(_LVL, _STRING) this->logStr(_LVL, _STRING)

#define INTERNAL_MRPT_LOG_ONCE(_LVL, _STRING) \
        do                                        \
        {                                         \
                static once_flag = false;             \
                if (!once_flag)                       \
                {                                     \
                        once_flag = true;                 \
                        this->logStr(_LVL, _STRING);      \
                }                                     \
        } while (0)

#define INTERNAL_MRPT_LOG_FMT(_LVL, _FMT_STRING, ...)     \
        do                                                    \
        {                                                     \
                if (this->isLoggingLevelVisible(_LVL))            \
                {                                                 \
                        this->logFmt(_LVL, _FMT_STRING, __VA_ARGS__); \
                }                                                 \
        } while (0)

#define INTERNAL_MRPT_LOG_STREAM(_LVL, __CONTENTS)                 \
        do                                                             \
        {                                                              \
                if (this->isLoggingLevelVisible(_LVL))                     \
                {                                                          \
                        ::mrpt::utils::COutputLoggerStreamWrapper(_LVL, *this) \
                                << __CONTENTS;                                     \
                }                                                          \
        } while (0)

#define INTERNAL_MRPT_LOG_THROTTLE(_LVL, _PERIOD_SECONDS, _STRING) \
        do                                                             \
        {                                                              \
                if (this->isLoggingLevelVisible(_LVL))                     \
                {                                                          \
                        static mrpt::utils::CTicTac tim;                       \
                        if (tim.Tac() > _PERIOD_SECONDS)                       \
                        {                                                      \
                                tim.Tic();                                         \
                                this->logStr(_LVL, _STRING);                       \
                        }                                                      \
                }                                                          \
        } while (0)

#define INTERNAL_MRPT_LOG_THROTTLE_STREAM(_LVL, _PERIOD_SECONDS, __CONTENTS) \
        do                                                                       \
        {                                                                        \
                if (this->isLoggingLevelVisible(_LVL))                               \
                {                                                                    \
                        static mrpt::utils::CTicTac tim;                                 \
                        if (tim.Tac() > _PERIOD_SECONDS)                                 \
                        {                                                                \
                                tim.Tic();                                                   \
                                ::mrpt::utils::COutputLoggerStreamWrapper(_LVL, *this)       \
                                        << __CONTENTS;                                           \
                        }                                                                \
                }                                                                    \
        } while (0)

#define INTERNAL_MRPT_LOG_THROTTLE_FMT(                       \
        _LVL, _PERIOD_SECONDS, _FMT_STRING, ...)                  \
        do                                                        \
        {                                                         \
                if (this->isLoggingLevelVisible(_LVL))                \
                {                                                     \
                        static mrpt::utils::CTicTac tim;                  \
                        if (tim.Tac() > _PERIOD_SECONDS)                  \
                        {                                                 \
                                tim.Tic();                                    \
                                this->logFmt(_LVL, _FMT_STRING, __VA_ARGS__); \
                        }                                                 \
                }                                                     \
        } while (0)

/** Use: `MRPT_LOG_DEBUG("message");`  */
#define MRPT_LOG_DEBUG(_STRING) \
        INTERNAL_MRPT_LOG(::mrpt::utils::LVL_DEBUG, _STRING)
#define MRPT_LOG_INFO(_STRING) \
        INTERNAL_MRPT_LOG(::mrpt::utils::LVL_INFO, _STRING)
#define MRPT_LOG_WARN(_STRING) \
        INTERNAL_MRPT_LOG(::mrpt::utils::LVL_WARN, _STRING)
#define MRPT_LOG_ERROR(_STRING) \
        INTERNAL_MRPT_LOG(::mrpt::utils::LVL_ERROR, _STRING)

/** Use: `MRPT_LOG_ONCE_DEBUG("once-only message");`  */
#define MRPT_LOG_ONCE_DEBUG(_STRING) \
        INTERNAL_MRPT_LOG_ONCE(::mrpt::utils::LVL_DEBUG, _STRING)
#define MRPT_LOG_ONCE_INFO(_STRING) \
        INTERNAL_MRPT_LOG_ONCE(::mrpt::utils::LVL_INFO, _STRING)
#define MRPT_LOG_ONCE_WARN(_STRING) \
        INTERNAL_MRPT_LOG_ONCE(::mrpt::utils::LVL_WARN, _STRING)
#define MRPT_LOG_ONCE_ERROR(_STRING) \
        INTERNAL_MRPT_LOG_ONCE(::mrpt::utils::LVL_ERROR, _STRING)

/** Use: `MRPT_LOG_THROTTLE_DEBUG(5.0, "message");`  */
#define MRPT_LOG_THROTTLE_DEBUG(_PERIOD_SECONDS, _STRING) \
        INTERNAL_MRPT_LOG_THROTTLE(                           \
                ::mrpt::utils::LVL_DEBUG, _PERIOD_SECONDS, _STRING)
#define MRPT_LOG_THROTTLE_INFO(_PERIOD_SECONDS, _STRING) \
        INTERNAL_MRPT_LOG_THROTTLE(                          \
                ::mrpt::utils::LVL_INFO, _PERIOD_SECONDS, _STRING)
#define MRPT_LOG_THROTTLE_WARN(_PERIOD_SECONDS, _STRING) \
        INTERNAL_MRPT_LOG_THROTTLE(                          \
                ::mrpt::utils::LVL_WARN, _PERIOD_SECONDS, _STRING)
#define MRPT_LOG_THROTTLE_ERROR(_PERIOD_SECONDS, _STRING) \
        INTERNAL_MRPT_LOG_THROTTLE(                           \
                ::mrpt::utils::LVL_ERROR, _PERIOD_SECONDS, _STRING)

/** Use: `MRPT_LOG_DEBUG_FMT("i=%u", i);`  */
#define MRPT_LOG_DEBUG_FMT(_FMT_STRING, ...) \
        INTERNAL_MRPT_LOG_FMT(::mrpt::utils::LVL_DEBUG, _FMT_STRING, __VA_ARGS__)
#define MRPT_LOG_INFO_FMT(_FMT_STRING, ...) \
        INTERNAL_MRPT_LOG_FMT(::mrpt::utils::LVL_INFO, _FMT_STRING, __VA_ARGS__)
#define MRPT_LOG_WARN_FMT(_FMT_STRING, ...) \
        INTERNAL_MRPT_LOG_FMT(::mrpt::utils::LVL_WARN, _FMT_STRING, __VA_ARGS__)
#define MRPT_LOG_ERROR_FMT(_FMT_STRING, ...) \
        INTERNAL_MRPT_LOG_FMT(::mrpt::utils::LVL_ERROR, _FMT_STRING, __VA_ARGS__)

/** Use: `MRPT_LOG_DEBUG_STREAM("Var=" << value << " foo=" << foo_var);` */
#define MRPT_LOG_DEBUG_STREAM(__CONTENTS) \
        INTERNAL_MRPT_LOG_STREAM(::mrpt::utils::LVL_DEBUG, __CONTENTS)
#define MRPT_LOG_INFO_STREAM(__CONTENTS) \
        INTERNAL_MRPT_LOG_STREAM(::mrpt::utils::LVL_INFO, __CONTENTS)
#define MRPT_LOG_WARN_STREAM(__CONTENTS) \
        INTERNAL_MRPT_LOG_STREAM(::mrpt::utils::LVL_WARN, __CONTENTS)
#define MRPT_LOG_ERROR_STREAM(__CONTENTS) \
        INTERNAL_MRPT_LOG_STREAM(::mrpt::utils::LVL_ERROR, __CONTENTS)

/** Usage: `MRPT_LOG_THROTTLE_DEBUG_STREAM(5.0, "Var=" << value << " foo=" <<
 * foo_var);` */
#define MRPT_LOG_THROTTLE_DEBUG_STREAM(_PERIOD_SECONDS, __CONTENTS) \
        INTERNAL_MRPT_LOG_THROTTLE_STREAM(                              \
                ::mrpt::utils::LVL_DEBUG, _PERIOD_SECONDS, __CONTENTS)
#define MRPT_LOG_THROTTLE_INFO_STREAM(_PERIOD_SECONDS, __CONTENTS) \
        INTERNAL_MRPT_LOG_THROTTLE_STREAM(                             \
                ::mrpt::utils::LVL_INFO, _PERIOD_SECONDS, __CONTENTS)
#define MRPT_LOG_THROTTLE_WARN_STREAM(_PERIOD_SECONDS, __CONTENTS) \
        INTERNAL_MRPT_LOG_THROTTLE_STREAM(                             \
                ::mrpt::utils::LVL_WARN, _PERIOD_SECONDS, __CONTENTS)
#define MRPT_LOG_THROTTLE_ERROR_STREAM(_PERIOD_SECONDS, __CONTENTS) \
        INTERNAL_MRPT_LOG_THROTTLE_STREAM(                              \
                ::mrpt::utils::LVL_ERROR, _PERIOD_SECONDS, __CONTENTS)

/** Usage: `MRPT_LOG_THROTTLE_DEBUG_FMT(5.0, "i=%u", i);` */
#define MRPT_LOG_THROTTLE_DEBUG_FMT(_PERIOD_SECONDS, _FMT_STRING, ...) \
        INTERNAL_MRPT_LOG_THROTTLE_FMT(                                    \
                ::mrpt::utils::LVL_DEBUG, _PERIOD_SECONDS, _FMT_STRING, __VA_ARGS__)
#define MRPT_LOG_THROTTLE_INFO_FMT(_PERIOD_SECONDS, _FMT_STRING, ...) \
        INTERNAL_MRPT_LOG_THROTTLE_FMT(                                   \
                ::mrpt::utils::LVL_INFO, _PERIOD_SECONDS, _FMT_STRING, __VA_ARGS__)
#define MRPT_LOG_THROTTLE_WARN_FMT(_PERIOD_SECONDS, _FMT_STRING, ...) \
        INTERNAL_MRPT_LOG_THROTTLE_FMT(                                   \
                ::mrpt::utils::LVL_WARN, _PERIOD_SECONDS, _FMT_STRING, __VA_ARGS__)
#define MRPT_LOG_THROTTLE_ERROR_FMT(_PERIOD_SECONDS, _FMT_STRING, ...) \
        INTERNAL_MRPT_LOG_THROTTLE_FMT(                                    \
                ::mrpt::utils::LVL_ERROR, _PERIOD_SECONDS, _FMT_STRING, __VA_ARGS__)

#ifdef _DEBUG
#define DEFAULT_LOGLVL_MRPT_UNSCOPED ::mrpt::utils::LVL_DEBUG
#else
#define DEFAULT_LOGLVL_MRPT_UNSCOPED ::mrpt::utils::LVL_DEBUG
#endif

/** For calling any `MRPT_LOG_*()` macro from outside of an object inherited
 * from COutputLogger.
  * Debug level is `DEBUG` if build with `_DEBUG` preprocessor flag, `INFO`
 * otherwise.
  * Use:
  * \code
  *  MRPT_UNSCOPED_LOGGER_START;
  *  MRPT_LOG_WARN("blah");
  *  MRPT_LOG_ERROR_STREAM("error: " << strval);
  *  MRPT_UNSCOPED_LOGGER_END;
  */
#define MRPT_UNSCOPED_LOGGER_START                                      \
        do                                                                  \
        {                                                                   \
                struct dummy_logger_ : public mrpt::utils::COutputLogger        \
                {                                                               \
                        dummy_logger_() : mrpt::utils::COutputLogger("MRPT_log")    \
                        {                                                           \
                                this->setMinLoggingLevel(DEFAULT_LOGLVL_MRPT_UNSCOPED); \
                        }                                                           \
                        void usercode()                                             \
                        {                                                           \
                                do                                                      \
                                {                                                       \
                        } while (0)                                                 \
// Here comes the user code, which is run in the ctor, and will call the object
// log methods.

#define MRPT_UNSCOPED_LOGGER_END  \
        }                             \
        }                             \
        ;                             \
        static dummy_logger_ tmp_obj; \
        tmp_obj.usercode();           \
        }                             \
        while (0)
}
// Specializations MUST occur at the same namespace:
namespace utils
{
template <>
struct TEnumTypeFiller<mrpt::utils::VerbosityLevel>
{
        typedef mrpt::utils::VerbosityLevel enum_t;
        static void fill(bimap<enum_t, std::string>& m_map)
        {
                using namespace mrpt::utils;
                m_map.insert(LVL_DEBUG, "DEBUG");
                m_map.insert(LVL_DEBUG, "LVL_DEBUG");
                m_map.insert(LVL_INFO, "INFO");
                m_map.insert(LVL_INFO, "LVL_INFO");
                m_map.insert(LVL_WARN, "WARN");
                m_map.insert(LVL_WARN, "LVL_WARN");
                m_map.insert(LVL_ERROR, "ERROR");
                m_map.insert(LVL_ERROR, "LVL_ERROR");
        }
};
}  // End of namespace
}
#endif /* end of include guard: COUTPUTLOGGER_H */