log.h
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/* ****************************************************************************
* Copyright 2019 Open Systems Development BV *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
* DEALINGS IN THE SOFTWARE. *
* ***************************************************************************/
#ifndef OSDEV_COMPONENTS_LOG_H
#define OSDEV_COMPONENTS_LOG_H
// local
#include "logutilslibexport.h"
// qt
#include <QString>
#include <QMutex>
class QObject;
namespace osdev {
namespace components {
#define LogDebug(context, text) \
if (osdev::components::Log::level() <= osdev::components::LogLevel::Debug) \
{ \
osdev::components::Log::debug(__FILE__, __LINE__, context, text); \
}
#define LogObject(context, object) \
if (osdev::components::Log::level() <= osdev::components::LogLevel::Debug) \
{ \
osdev::components::Log::logObject(__FILE__, __LINE__, context, object); \
}
#define LogInfo(context, text) \
if (osdev::components::Log::level() <= osdev::components::LogLevel::Info) \
{ \
osdev::components::Log::info(__FILE__, __LINE__, context,text); \
}
#define LogWarning(context, text) \
if (osdev::components::Log::level() <= osdev::components::LogLevel::Warning) \
{ \
osdev::components::Log::warning(__FILE__, __LINE__, context, text); \
}
#define LogError(context, text) \
if (osdev::components::Log::level() <= osdev::components::LogLevel::Error) \
{ \
osdev::components::Log::error(__FILE__, __LINE__, context, text); \
}
#define LogTrace(context, text) \
if (osdev::components::Log::level() <= osdev::components::LogLevel::Trace) \
{ \
osdev::components::Log::trace(__FILE__, __LINE__, context, text); \
}
enum class LogLevel
{
Trace,
Debug,
Info,
Warning,
Error
};
/*! \class Log
\brief Basic logging mechanism.
*/
class LOGUTILSLIBINTERFACE Log
{
public:
/**
* @brief Initialise the logging mechanism
* @param context The main context
* @param logFile Logfile if available
* @param logDepth Initial log-depth
*/
static void init( const QString& context,
const QString& logFile = QString(),
LogLevel logDepth = LogLevel::Info );
//! Shutdown the logging mechanism.
static void terminate();
/**
* @brief Log a trace message in a category.
* @param file Name of the source-file
* @param line The line number in the source-file
* @param category The category of the message.
* @param message The string to print.
*/
static void trace( const char* file, int line,
const QString& category, const QString& message );
/**
* @brief Log a debug message in a category.
* @param file Name of the source-file
* @param line The line number in the source-file
* @param category The category of the message.
* @param message The string to print.
*/
static void debug(const char* file, int line,
const QString& category, const QString& message);
/**
* @brief Log an info message in a category.
* @param file Name of the source-file
* @param line The line number in the source-file
* @param category The category of the message.
* @param message The string to print.
*/
static void info( const char* file, int line,
const QString& category, const QString& message );
/**
* @brief Log a warning message in a category.
* @param file Name of the source-file
* @param line The line number in the source-file
* @param category The category of the message.
* @param message The string to print.
*/
static void warning( const char* file, int line,
const QString& category, const QString& message );
/**
* @brief Log an error message in a category.
* @param file Name of the source-file
* @param line The line number in the source-file
* @param category The category of the message.
* @param message The string to print.
*/
static void error( const char* file, int line,
const QString& category, const QString& message );
/**
* @brief Dump a complete Qt Object in the logging stream at LogLevel::Debug
* @param file Name of the source-file
* @param line The line number in the source-file
* @param category The category of the message
* @param object The object to print
*/
static void logObject( const char* file, int line,
const QString& category, QObject* object );
/**
* @return The current log level.
*/
static LogLevel level()
{
return s_logLevel;
}
protected:
/**
* @brief Log a debug message in a category.
* @param category The category of the message.
* @param message The string to print.
*/
static void debug(const QString& category, const QString& message);
/**
* @brief Log an info message in a category.
* @param category The category of the message.
* @param message The string to print.
*/
static void info( const QString& category, const QString& message );
/**
* @brief Log a warning message in a category.
* @param category The category of the message.
* @param message The string to print.
*/
static void warning( const QString& category, const QString& message );
/**
* @brief Log an error message in a category.
* @param category The category of the message.
* @param message The string to print.
*/
static void error( const QString& category, const QString& message );
/**
* @brief Log a trace message in a category.
* @param category The category of the message.
* @param message The string to print.
*/
static void trace( const QString& category, const QString& message );
/**
* @brief Dump a complete Qt Object in the logging stream at LogLevel::Info
* @param category The category of the message
* @param object The object to print
*/
static void logObject( const QString& category, QObject* object );
//! Create a convenient timestamp
static QString getDateTime();
/**
* @brief Write the message to the logfile
* @param category The category of the message.
* @param message The string to print.
* @param level Selected log level
*/
static void writeLog( const QString& category,
const QString& message,
LogLevel level );
/**
* @brief Log an error message in a category.
* @param category The category of the message.
* @param message The string to print.
* @param level Selected log level
*/
static void log(const QString& category,
const QString& message,
LogLevel level);
private:
/**
* @brief Put filename, line-number and message in one string
* @param file Source-file
* @param line Line in source-file
* @param message The string to print
* @return Formatted string with file, line and message
*/
static QString fileinfoMessage(const char* file, int line,
const QString& message);
//! The main context.
static QString s_context;
//! The name of the LogFile.
static QString s_fileName;
//! The amount of logging
static LogLevel s_logLevel;
//! Mutex to keep it thread-safe
static QMutex m_mutex;
};
} // End namespace components
} // End namespace osdev
#endif // OSDEV_COMPONENTS_LOG_H