log4cplus是C++编写的开源的日志系统, The purpose of this project is to port the excellent Log for Java (log4j)logging library to C++。
log4cplus具有灵活、强大、使用简单、多线程安全的特点,实在是杂牌军、游击队的福音。
2. 安装使用(Linux)
log4cplus安装使用非常简单,从其官网:http://log4cplus.sourceforge.net/ 下载最新版本
运行:
tar xvzf log4cplus-x.x.x.tar.gz
cd log4cplus-x.x.x
./configure --prefix =/where/to/install
make
make install
在安装目录下生成include和lib两个文件夹,分别为头文件和库文件
使用:
g++ -o server /mnt/hgfs/work_vm/project/work_project/server/obj/main.o -L../..//third/log4cplus/lib/ -L../..//third/boost/lib/ -llog4cplus -lpthread -I/mnt/hgfs/work_vm/project/work_project/server/include -I../..//third/log4cplus/include/-I../..//third/boost/include/
编译参数:
-L../..//third/log4cplus/lib/
-llog4cplus
-lpthread
-I../..//third/log4cplus/include/
3. 使用
log4cplus主要包括layout、appender、loglevel等内容,可以参考:
http://masterdog.bokee.com/153892.html
写的非常nice
4. 包装
logcplus包装下用起来非常方便,以下是我的包装,供参考
Log.h
// Log.h: interface for the Log class.
//
//
#if !defined(AFX_LOG_H__B87F71E3_FFAE_4CFA_A528_3F4F2FF7D69E__INCLUDED_)
#define AFX_LOG_H__B87F71E3_FFAE_4CFA_A528_3F4F2FF7D69E__INCLUDED_
#include "log4cplus/loglevel.h"
#include "log4cplus/ndc.h"
#include "log4cplus/logger.h"
#include "log4cplus/configurator.h"
#include "iomanip"
#include "log4cplus/fileappender.h"
#include "log4cplus/layout.h"
#include "const.h"
#include "common.h"
#include "Main_config.h"
using namespace log4cplus;
using namespace log4cplus::helpers;
//日志封装
#define TRACE(p) LOG4CPLUS_TRACE(Log::_logger, p)
#define DEBUG(p) LOG4CPLUS_DEBUG(Log::_logger, p)
#define NOTICE(p) LOG4CPLUS_INFO(Log::_logger, p)
#define WARNING(p) LOG4CPLUS_WARN(Log::_logger, p)
#define FATAL(p) LOG4CPLUS_ERROR(Log::_logger, p)
// 日志控制类,全局共用一个日志
class Log
{
public:
// 打开日志
bool open_log();
// 获得日志实例
static Log& instance();
static Logger _logger;
private:
Log();
virtual ~Log();
//log文件路径及名称
char _log_path[PATH_SIZE];
char _log_name[PATH_SIZE];
};
#endif // !defined(AFX_LOG_H__B87F71E3_FFAE_4CFA_A528_3F4F2FF7D69E__INCLUDED_)
Log.cpp:
// Log.cpp: implementation of the Log class.
//
//
#include "Log.h"
//
// Construction/Destruction
//
Logger Log::_logger = log4cplus::Logger::getInstance("main_log");
Log::Log()
{
snprintf(_log_path, sizeof(_log_path), "%s", "../log");
snprintf(_log_name, sizeof(_log_name), "%s/%s.%s", _log_path, execname, "log");
}
Log::~Log()
{
}
Log& Log::instance()
{
static Log log;
return log;
}
bool Log::open_log()
{
int Log_level = Main_config::instance().get_config().Read("LOG_LEVEL", 0);
/* step 1: Instantiate an appender object */
SharedAppenderPtr _append(new FileAppender(_log_name));
_append->setName("file log test");
/* step 2: Instantiate a layout object */
std::string pattern = "[%p] [%d{%m/%d/%y %H:%M:%S}] [%t] - %m %n";
std::auto_ptr _layout(new PatternLayout(pattern));
/* step 3: Attach the layout object to the appender */
_append->setLayout(_layout);
/* step 4: Instantiate a logger object */
/* step 5: Attach the appender object to the logger */
Log::_logger.addAppender(_append);
/* step 6: Set a priority for the logger */
Log::_logger.setLogLevel(Log_level);
return true;
}
int Log_level = Main_config::instance().get_config().Read("LOG_LEVEL", 0);
Main_config是我自己包装的一个配置类(参考:http://blog.csdn.net/yfkiss/article/details/6802451),通过读取配置设置log level。
使用:
#inlucde "Log.h"
程序初始化的时候:
// 打开日志
if (!Log::instance().open_log())
{
std::cout << "Log::open_log() failed" << std::endl;
return false;
}
然后使用NOTICE、FATAL等就可以打印日志到文件。
#include "Log.h"
....
// 打开日志
if (!Log::instance().open_log())
{
std::cout << "Log::open_log() failed" << std::endl;
return false;
}
.....
NOTICE("Server init succ");
FATAL("Server run failed");