通用日志系统LogSystem
简介
- 封装一个通用日志系统，能够通知支持标准输出和syslog日志输出方式
- 当初始化日志系统时，判断环境变量LOGMODE，如果LOGMODE的值为syslog就选择syslog的日志打印方式，否则选择标准输出。
- 在选择标准输出时，通过环境变量LOGLEVEL可以设置日志的打印级别
头文件logSystem.h定义
<br />#ifndef LOGSYSTEM_H
#define LOGSYSTEM_H
#include <stdint.h>
#include <sys/time.h>
/*-------------------color-------------------------------------*/
#define NONE "\033[m"
#define RED "\033[0;32;31m"
#define LIGHT_RED "\033[1;31m"
#define GREEN "\033[0;32;32m"
#define LIGHT_GREEN "\033[1;32m"
#define BLUE "\033[0;32;34m"
#define LIGHT_BLUE "\033[1;34m"
#define DARY_GRAY "\033[1;30m"
#define CYAN "\033[0;36m"
#define LIGHT_CYAN "\033[1;36m"
#define PURPLE "\033[0;35m"
#define LIGHT_PURPLE "\033[1;35m"
#define BROWN "\033[0;33m"
#define YELLOW "\033[1;33m"
#define LIGHT_GRAY "\033[0;37m"
#define WHITE "\033[1;37m"
/*--------------------color------------------------------------*/
enum LogMode
{
OUTPUT_TO_TTY = 0,
OUTPUT_TO_SYSLOG,
};
enum SysLog
{
LOG_EMERG = 0, /* system is unusable */
LOG_ALERT = 1, /* action must be taken immediately */
LOG_CRIT = 2, /* critical conditions */
LOG_ERR = 3, /* error conditions */
LOG_WARNING = 4, /* warning conditions */
LOG_NOTICE = 5, /* normal but significant condition */
LOG_INFO = 6, /* informational */
LOG_DEBUG = 7, /* debug-level messages */
};
class LogSystem
{
public:
LogSystem();
virtual ~LogSystem();
virtual void LogInfo(const char *stringFormat, ...) throw();
virtual void LogDebug(const char *stringFormat, ...) throw();
virtual void LogWarning(const char *stringFormat, ...) throw();
virtual void LogError(const char *stringFormat, ...) throw();
virtual void setLogPri(uint8_t pri);
static LogSystem* getInstance();
};
extern LogSystem* logHandler;
class LogTotty:public LogSystem
{
public:
LogTotty();
virtual void LogInfo(const char *stringFormat, ...) throw();
virtual void LogDebug(const char *stringFormat, ...) throw();
virtual void LogWarning(const char *stringFormat, ...) throw();
virtual void LogError(const char *stringFormat, ...) throw();
virtual void setLogPri(uint8_t pri);
private:
int priority;
struct timespec ts;
char logMsg[1024];
};
class LogTosyslog:public LogSystem
{
public:
LogTosyslog();
virtual ~LogTosyslog();
virtual void LogInfo(const char *stringFormat, ...) throw();
virtual void LogDebug(const char *stringFormat, ...) throw();
virtual void LogWarning(const char *stringFormat, ...) throw();
virtual void LogError(const char *stringFormat, ...) throw();
virtual void setLogPri(uint8_t pri);
private:
struct timespec ts;
char logMsg[1024];
};
#endif
LogSystem为抽象类，LogTotty和LogTosyslog分别继承实现标准输出、syslog输出。基于的是多态的设计。
类的具体实现
<br />#include "logSystem.h"
#include <syslog.h>
#include <stdlib.h>
#include <stdarg.h>
#include <time.h>
#include <iostream>
#include <stdio.h>
#include <string.h>
LogSystem* logHandler = NULL;
LogSystem::LogSystem()
{
}
LogSystem::~LogSystem()
{
}
void LogSystem::LogInfo(const char *stringFormat, ...) throw()
{
}
void LogSystem::LogDebug(const char *stringFormat, ...) throw()
{
}
void LogSystem::LogWarning(const char *stringFormat, ...) throw()
{
}
void LogSystem::LogError(const char *stringFormat, ...) throw()
{
}
void LogSystem::setLogPri(uint8_t pri)
{
}
LogSystem* LogSystem::getInstance(){
char *logMode;
char sysMode[]="syslog";
if(NULL==logHandler){
logMode = getenv("LOGMODE");
if(NULL==logMode||strcmp(sysMode,logMode)!=0){
printf("log to tty\n");
logHandler = new LogTotty();
}else{
printf("log to syslog\n");
logHandler = new LogTosyslog();
}
}
return logHandler;
}
LogTotty::LogTotty()
{
priority = atoi( NULL == getenv( "LOGLEVEL" ) ? "3" : getenv( "LOGLEVEL" ) );
logMsg[1024]={0};
}
void LogTotty::LogInfo(const char *stringFormat, ...) throw()
{
if (priority >= LOG_INFO)
{
va_list va;
va_start(va,stringFormat);
clock_gettime(CLOCK_MONOTONIC, &ts);
vsprintf(logMsg, stringFormat, va);
std::cout <<GREEN<< "[IPC_Serial][INFO]:" <<'['<<ts.tv_sec <<'.'<<ts.tv_nsec<<']'<< logMsg<< std::endl;
va_end(va);
}
}
void LogTotty::LogDebug(const char *stringFormat, ...) throw()
{
if (priority >= LOG_DEBUG)
{
va_list va;
va_start(va,stringFormat);
clock_gettime(CLOCK_MONOTONIC, &ts);
vsprintf(logMsg, stringFormat, va);
std::cout <<GREEN << "[IPC_Serial][DEBUG]:" <<'['<<ts.tv_sec <<'.'<<ts.tv_nsec<<']'<<logMsg << std::endl;
va_end(va);
}
}
void LogTotty::LogWarning(const char *stringFormat, ...) throw()
{
if (priority >= LOG_WARNING)
{
va_list va;
va_start(va,stringFormat);
clock_gettime(CLOCK_MONOTONIC, &ts);
vsprintf(logMsg, stringFormat, va);
std::cout <<YELLOW<< "[IPC_Serial][WARN]:" <<'['<<ts.tv_sec <<'.'<<ts.tv_nsec<<']'<<logMsg << std::endl;
va_end(va);
}
}
void LogTotty::LogError(const char *stringFormat, ...) throw()
{
if (priority >= LOG_ERR)
{
va_list va;
va_start(va,stringFormat);
clock_gettime(CLOCK_MONOTONIC, &ts);
vsprintf(logMsg, stringFormat, va);
std::cout <<RED<< "[IPC_Serial][ERROR]:" <<'['<<ts.tv_sec <<'.'<<ts.tv_nsec<<']'<<logMsg << std::endl;
va_end(va);
}
}
void LogTotty::setLogPri(uint8_t pri)
{
std::cout <<"current log priority is "<<priority<<", will to"<<pri<<std::endl;
priority = pri;
}
LogTosyslog::LogTosyslog()
{
openlog("[IPC_Serial]", LOG_PID|LOG_CONS, LOG_LOCAL0);
setlogmask(LOG_UPTO(LOG_DEBUG));
}
LogTosyslog::~LogTosyslog()
{
closelog();
}
void LogTosyslog::LogInfo(const char *stringFormat, ...) throw()
{
va_list va;
va_start(va,stringFormat);
clock_gettime(CLOCK_MONOTONIC, &ts);
vsprintf(logMsg, stringFormat, va);
syslog(LOG_INFO, "[%ld.%ld]%s", ts.tv_sec, ts.tv_nsec,logMsg);
va_end(va);
}
void LogTosyslog::LogDebug(const char *stringFormat, ...) throw()
{
va_list va;
va_start(va,stringFormat);
clock_gettime(CLOCK_MONOTONIC, &ts);
vsprintf(logMsg, stringFormat, va);
syslog(LOG_DEBUG, "[%ld.%ld]%s", ts.tv_sec, ts.tv_nsec,logMsg);
va_end(va);
}
void LogTosyslog::LogWarning(const char *stringFormat, ...) throw()
{
va_list va;
va_start(va,stringFormat);
clock_gettime(CLOCK_MONOTONIC, &ts);
vsprintf(logMsg, stringFormat, va);
syslog(LOG_WARNING, "[%ld.%ld]%s", ts.tv_sec, ts.tv_nsec,logMsg);
va_end(va);
}
void LogTosyslog::LogError(const char *stringFormat, ...) throw()
{
va_list va;
va_start(va,stringFormat);
clock_gettime(CLOCK_MONOTONIC, &ts);
vsprintf(logMsg, stringFormat, va);
syslog(LOG_ERR, "[%ld.%ld]%s", ts.tv_sec, ts.tv_nsec,logMsg);
va_end(va);
}
void LogTosyslog::setLogPri(uint8_t pri)
{
LogInfo("current log priority will upto %d", pri);
setlogmask(LOG_UPTO(pri));
}