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// Copyright 2008 Nanorex, Inc. See LICENSE file for details.
#ifndef NX_LOGGER_H
#define NX_LOGGER_H
#include <stdio.h>
#include <list>
#include <string>
#include <QMutex>
#include <QDateTime>
//#include <QMutexLocker>
namespace Nanorex {
typedef enum NXLogLevel {
NXLogLevel_Debug, // General debugging.
NXLogLevel_Config, // Debugging configurations (graphics depth, os, etc.)
NXLogLevel_Info, // Information interesting to the user.
NXLogLevel_Warning, // Important things the user should know.
NXLogLevel_Severe // Things that should stop the user before continuing.
};
static char LogLevelNames[][8] = {
"DEBUG", "CONFIG", "INFO", "WARNING", "SEVERE"
};
/* CLASS: LogRecord */
/**
* Used internally by NXLogHandler and NXLogger.
*/
class LogRecord {
public:
LogRecord(NXLogLevel logLevel, const std::string& source,
const std::string& message) {
this->logLevel = logLevel;
this->source = source;
this->message = message;
dateTime = QDateTime::currentDateTime();
}
NXLogLevel getLogLevel() { return logLevel; }
QDateTime getDateTime() { return dateTime; }
std::string getSource() { return source; }
std::string getMessage() { return message; }
private:
NXLogLevel logLevel;
QDateTime dateTime;
std::string source;
std::string message;
};
/* CLASS: NXLogHandler */
/**
* Base class for NXLogger log entry emission handlers.
* @ingroup NanorexUtility, Logging
*/
class NXLogHandler {
public:
NXLogHandler(NXLogLevel logLevel) { this->logLevel = logLevel; }
virtual ~NXLogHandler() { }
virtual void publish(LogRecord logRecord) = 0;
protected:
NXLogLevel logLevel;
};
/* CLASS: NXLogger */
/**
* A simple logging mechanism.
* @ingroup NanorexUtility, Logging
*/
class NXLogger {
public:
NXLogger() { ThisInstance = this; }
~NXLogger() {
log(NXLogLevel_Info,
"NXLogger",
"*********** Log End *************");
// Delete handlers
std::list<NXLogHandler*>::iterator iter = logHandlers.begin();
while (iter != logHandlers.end()) {
delete (*iter);
iter++;
}
}
void log(NXLogLevel logLevel, const std::string& source,
const std::string& message) {
mutex.lock();
LogRecord logRecord(logLevel, source, message);
std::list<NXLogHandler*>::iterator iter = logHandlers.begin();
while (iter != logHandlers.end()) {
(*iter)->publish(logRecord);
iter++;
}
mutex.unlock();
}
void addHandler(NXLogHandler* logHandler) {
logHandlers.push_back(logHandler);
logHandler->publish(LogRecord(NXLogLevel_Info,
"NXLogger",
"*********** Log Start ***********"));
}
static NXLogger* Instance() { return ThisInstance; }
private:
QMutex mutex;
std::list<NXLogHandler*> logHandlers;
static NXLogger* ThisInstance;
};
// Convenience macros
#define NXLOG_DEBUG(source, message) { \
Nanorex::NXLogger* logger = Nanorex::NXLogger::Instance(); \
if (logger != 0) \
logger->log(Nanorex::NXLogLevel_Debug, source, message); \
};
#define NXLOG_CONFIG(source, message) { \
Nanorex::NXLogger* logger = Nanorex::NXLogger::Instance(); \
if (logger != 0) \
logger->log(Nanorex::NXLogLevel_Config, source, message); \
};
#define NXLOG_INFO(source, message) { \
Nanorex::NXLogger* logger = Nanorex::NXLogger::Instance(); \
if (logger != 0) \
logger->log(Nanorex::NXLogLevel_Info, (source), (message)); \
};
#define NXLOG_WARNING(source, message) { \
Nanorex::NXLogger* logger = Nanorex::NXLogger::Instance(); \
if (logger != 0) \
logger->log(Nanorex::NXLogLevel_Warning, source, message); \
};
#define NXLOG_SEVERE(source, message) { \
Nanorex::NXLogger* logger = Nanorex::NXLogger::Instance(); \
if (logger != 0) \
logger->log(Nanorex::NXLogLevel_Severe, source, message); \
};
/* CLASS: NXConsoleLogHandler */
/**
* Emits log entries to the console.
* @ingroup NanorexUtility, Logging
*/
class NXConsoleLogHandler : public NXLogHandler {
public:
NXConsoleLogHandler(NXLogLevel logLevel) : NXLogHandler(logLevel) { }
void publish(LogRecord logRecord) {
if (logRecord.getLogLevel() >= logLevel) {
//mutex.lock();
printf("%s [%-7s] %s %s\n",
qPrintable(logRecord.getDateTime()
.toString("yyyy-MM-dd hh:mm:ss.zzz")),
LogLevelNames[logRecord.getLogLevel()],
(logRecord.getSource().length() == 0 ?
"" : logRecord.getSource().append(":").c_str()),
logRecord.getMessage().c_str());
fflush(0);
//mutex.unlock();
}
}
private:
QMutex mutex;
};
/* CLASS: NXFileLogHandler */
/**
* Emits log entries to a specified file.
* @ingroup NanorexUtility, Logging
*/
class NXFileLogHandler : public NXLogHandler {
public:
NXFileLogHandler(const std::string& filename, NXLogLevel logLevel) :
NXLogHandler(logLevel) {
filehandle = fopen(filename.c_str(), "w");
if (filehandle != 0) {
fprintf(filehandle,
"%s NXFileLogHandler started. Writing to: %s\n",
qPrintable(QDateTime::currentDateTime()
.toString("yyyy-MM-dd hh:mm:ss.zzz")),
filename.c_str());
printf("NXFileLogHandler started. Writing to: %s\n",
filename.c_str());
} else
printf("NXFileLogHandler could not open file for writing: %s\n",
filename.c_str());
}
~NXFileLogHandler() {
if (filehandle != 0)
fclose(filehandle);
}
void publish(LogRecord logRecord) {
if ((filehandle != 0) && (logRecord.getLogLevel() >= logLevel)) {
//mutex.lock();
fprintf(filehandle,"%s [%-7s] %s %s\n",
qPrintable(logRecord.getDateTime()
.toString("yyyy-MM-dd hh:mm:ss.zzz")),
LogLevelNames[logRecord.getLogLevel()],
(logRecord.getSource().length() == 0 ?
"" : logRecord.getSource().append(":").c_str()),
logRecord.getMessage().c_str());
//mutex.unlock();
}
}
private:
QMutex mutex;
FILE* filehandle;
};
} // Nanorex::
#endif
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