终于把sylar给赶工做完了，趁热打铁一波，把源码解析做一遍
再次感谢sylar-yin老师的无偿视频教学
日志模块一共定义了UNKNOW,DEBUG,INFO,WARN,ERROR,FATAL6种日志等级。
每次日志生成实际上都会生成一个LogEventWrap，其内部封装了一个LogEvent对象，在LogEventWrap析构时，会自动调用指定的logger来输出该LogEvent。又因为宏中使用了if，因此该行结束后LogEventWrap会直接析构掉自己，打印日志。
LogFormatter用于按照指定格式打印日志，内部包含了FormatItem类，用于解析给定的pattern。
LogAppender用于指定输出的方式（StdoutLogAppender，FileLogAppender），内含一个LogFormatter。
Logger内含一个std::list
logmanager全局管理logger，自身为单例模式。
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#pragma once
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include"singleton.h"
#include"util.h"
#include"thread.h"
#define SYLAR_LOG_LEVEL(logger,level) \
if(logger->getLevel() <= level) \
sylar::LogEventWrap(sylar::LogEvent::ptr(new sylar::LogEvent(logger,level,\
__FILE__,__LINE__,0,sylar::GetThreadId(),\
sylar::GetFiberId(),time(0),sylar::Thread::GetName()))).getSS()
#define SYLAR_LOG_DEBUG(logger) SYLAR_LOG_LEVEL(logger,sylar::LogLevel::DEBUG)
#define SYLAR_LOG_INFO(logger) SYLAR_LOG_LEVEL(logger,sylar::LogLevel::INFO)
#define SYLAR_LOG_WARN(logger) SYLAR_LOG_LEVEL(logger,sylar::LogLevel::WARN)
#define SYLAR_LOG_ERROR(logger) SYLAR_LOG_LEVEL(logger,sylar::LogLevel::ERROR)
#define SYLAR_LOG_FATAL(logger) SYLAR_LOG_LEVEL(logger,sylar::LogLevel::FATAL)
#define SYLAR_LOG_FMT_LEVEL(logger,level,fmt,...) \
if(logger->getLevel()<=level) \
sylar::LogEventWrap(sylar::LogEvent::ptr(new sylar::LogEvent(logger,level,\
__FILE__,__LINE__,0,sylar::GetThreadId(),\
sylar::GetFiberId(),time(0),sylar::Thread::GetName()))).getEvent()->format(fmt,__VA_ARGS__)
#define SYLAR_LOG_FMT_DEBUG(logger,fmt,...) SYLAR_LOG_FMT_LEVEL(logger,sylar::LogLevel::DEBUG,fmt,__VA_ARGS__)
#define SYLAR_LOG_FMT_INFO(logger,fmt,...) SYLAR_LOG_FMT_LEVEL(logger,sylar::LogLevel::INFO,fmt,__VA_ARGS__)
#define SYLAR_LOG_FMT_WARN(logger,fmt,...) SYLAR_LOG_FMT_LEVEL(logger,sylar::LogLevel::WARN,fmt,__VA_ARGS__)
#define SYLAR_LOG_FMT_ERROR(logger,fmt,...) SYLAR_LOG_FMT_LEVEL(logger,sylar::LogLevel::ERROR,fmt,__VA_ARGS__)
#define SYLAR_LOG_FMT_FATAL(logger,fmt,...) SYLAR_LOG_FMT_LEVEL(logger,sylar::LogLevel::FATAL,fmt,__VA_ARGS__)
#define SYLAR_LOG_ROOT() sylar::LoggerMgr::GetInstance()->getRoot()
#define SYLAR_LOG_NAME(name) sylar::LoggerMgr::GetInstance()->getLogger(name)
namespace sylar {
class Logger;
class LoggerManager;
//日志级别
class LogLevel {
public:
enum Level {
UNKNOW = 0,
DEBUG = 1,
INFO,
WARN,
ERROR,
FATAL
};
//将level类型转为对应的字符输出
static const char * Tostring(LogLevel::Level level);
//将给定的字符转为level类
static LogLevel::Level FromString(const std::string & str);
};
//日志事件
class LogEvent {
public:
typedef std::shared_ptr
/// @brief 构造函数
/// @param logger 日志器
/// @param level 日志等级
/// @param file 当前文件名
/// @param line 当前行数
/// @param elapse 程序启动依赖的耗时
/// @param threadid 当前线程id
/// @param fiberId 当前协程id
/// @param time 当前时间
/// @param thread_name 线程名
LogEvent(std::shared_ptr
uint32_t threadid,uint32_t fiberId,uint64_t time,const std::string & thread_name);
//返回文件名
const char * getFile() const {return m_file;}
//返回行号
int32_t getLine() const {return m_line;}
//返回运行时间
uint32_t getElapse() const {return m_elapse;}
//返回线程id
uint32_t getThreadId() const {return m_threadId;}
//返回协程id
uint32_t getFiberId() const {return m_fiberId;}
//返回当前时间
uint64_t getTime() const {return m_time;}
//返回线程名
const std::string& getThreadName()const {return m_threadName;}
//返回日志内容
std::string getContent() const {return m_ss.str();}
std::stringstream & getSS() {return m_ss;}
std::shared_ptr
//返回日志等级
LogLevel::Level getLevel() {return m_level;}
//按照fmt格式写日志到m_ss里
void format(const char * fmt,...);
void format(const char * fmt,va_list al);
private:
const char * m_file = nullptr; //文件名
int32_t m_line = 0; //行号
uint32_t m_elapse = 0; //程序启动毫秒数
uint32_t m_threadId = 0; //线程id
uint32_t m_fiberId = 0; //协程id
uint64_t m_time =0; //时间戳
std::string m_threadName;
std::shared_ptr
LogLevel::Level m_level;
std::stringstream m_ss;
};
class LogEventWrap{
public:
LogEventWrap(LogEvent::ptr event):m_event(event){};
~LogEventWrap();
std::stringstream & getSS(){return m_event->getSS();}
LogEvent::ptr getEvent(){return m_event;}
private:
LogEvent::ptr m_event;
};
//日志格式器
class LogFormatter {
public:
typedef std::shared_ptr
/// @brief 利用pattern解析出m_items,做到按指定格式输出字符的效果
/// @param pattern 用于解析的字符串
LogFormatter(const std::string pattern);
//调用自身m_items中所有FormatItem的format事件
//返回结果构成的字符串
std::string format(std::shared_ptr
// private:
class FormatItem{
public:
typedef std::shared_ptr
// FormatItem(const std::string & fmt =""){}
virtual ~FormatItem(){}
virtual void format(std::ostream& os,std::shared_ptr
};
//真正的解析函数
void init();
bool isError() const {return m_error;}
std::string getPattern() const {return m_pattern;}
private:
std::string m_pattern;
std::vector
bool m_error =false;
};
//日志输出地
class LogAppender{
friend class Logger;
public:
typedef std::shared_ptr
typedef Spinlock MutexType;
virtual ~LogAppender(){};
virtual void log(std::shared_ptr
virtual std::string toYamlString() = 0;
void setFormatter(LogFormatter::ptr val);
LogFormatter::ptr getFormatter();
void setLevel(LogLevel::Level level){m_level=level;}
protected:
LogLevel::Level m_level = LogLevel::DEBUG;
bool m_hasFormatter = false;
MutexType m_mutex;
LogFormatter::ptr m_formatter;
};
//日志器
class Logger : public std::enable_shared_from_this
friend class LoggerManager;
public:
typedef std::shared_ptr
typedef Spinlock MutexType;
Logger(const std::string & name = "root");
//调用管理的LoggerAppender的每个format事件，level可指定
void log(LogLevel::Level level,LogEvent::ptr event);
//debug级别的log调用
void debug(LogEvent::ptr event);
//info级别的log调用
void info(LogEvent::ptr event);
//warn级别的log调用
void warn(LogEvent::ptr event);
//fatal级别的log调用
void fatal(LogEvent::ptr event);
//error级别的log调用
void error(LogEvent::ptr event);
void addAppender(LogAppender::ptr appender);
void delAppender(LogAppender::ptr appender);
void clearAppenders();
LogLevel::Level getLevel() const {return m_level;}
void setLevel(LogLevel::Level level){m_level = level;}
const std::string & getName()const {return m_name;}
void setFormatter(LogFormatter::ptr val);
void setFormatter(const std::string & val);
LogFormatter::ptr getFormatter();
std::string toYamlString();
private:
std::string m_name; //日志名称
LogLevel::Level m_level; //日志级别
MutexType m_mutex;
std::list
LogFormatter::ptr m_formatter; //自带的formatter ,方便调试
Logger::ptr m_root;//默认的日志器
};
//输出到控制台的Appender
class StdoutLogAppender : public LogAppender {
public:
virtual std::string toYamlString() override;
typedef std::shared_ptr
virtual void log(std::shared_ptr
};
//输出到文件的Appender
class FileLogAppender : public LogAppender {
public:
typedef std::shared_ptr
FileLogAppender(const std::string filname);
virtual void log(std::shared_ptr
virtual std::string toYamlString() override;
//重新开打文件
bool reopen();
private:
std::string m_filename;
std::ofstream m_filestream;
};
//全局logger管理器
class LoggerManager{
public:
typedef Spinlock MutexType;
LoggerManager();
Logger::ptr getLogger(const std::string & name);
//do noting
void init();
Logger::ptr getRoot()const {return m_root;}
std::string toYamlString();
private:
std::map
Logger::ptr m_root; //指向当前正在使用的日志器
MutexType m_mutex;
};
//静态单列模式
typedef Singleton
}
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#include"log.h"
#include
#include
#include
#include"config.h"
#include"thread.h"
namespace sylar{
const char *LogLevel::Tostring(LogLevel::Level level)
{
//宏替换,#name 等效于"name"
switch(level){
#define XX(name) \
case LogLevel::name: \
return #name;
XX(DEBUG);
XX(INFO);
XX(WARN);
XX(ERROR);
XX(FATAL);
#undef XX
default:
return "UNKNOW";
}
return "UNKNOW";
}
LogLevel::Level LogLevel::FromString(const std::string &str)
{
//用strcasecmp简化掉
#define XX(LEVEL,v) \
if(strcasecmp(str.c_str(),#v)==0){ \
return LogLevel::LEVEL; \
}
XX(DEBUG,debug)
XX(INFO,info)
XX(WARN,warn)
XX(ERROR,error)
XX(FATAL,fatal)
#undef XX
return LogLevel::UNKNOW;
}
//消息体
class MessageFormatItem : public LogFormatter::FormatItem
{
public:
MessageFormatItem(const std::string &str = "") {}
void format(std::ostream &os, Logger::ptr logger, LogLevel::Level level, LogEvent::ptr event) override
{
os << event->getContent();
}
};
//日志等级
class LevelFormatItem : public LogFormatter::FormatItem{
public:
LevelFormatItem(const std::string & str = ""){}
void format(std::ostream& os,Logger::ptr logger,LogLevel::Level level,LogEvent::ptr event) override{
os << LogLevel::Tostring(level);
}
};
//运行时间
class ElapseFormatItem : public LogFormatter::FormatItem{
public:
ElapseFormatItem(const std::string & str = ""){}
void format(std::ostream& os,Logger::ptr logger,LogLevel::Level level,LogEvent::ptr event) override{
os << event->getElapse();
}
};
//日志名称
class NameFormatItem : public LogFormatter::FormatItem{
public:
NameFormatItem(const std::string & str = ""){}
void format(std::ostream& os,Logger::ptr logger,LogLevel::Level level,LogEvent::ptr event) override{
os << event->getLogger()->getName();
}
};
//线程id
class ThreadIdFormatItem : public LogFormatter::FormatItem{
public:
ThreadIdFormatItem(const std::string & str = ""){}
void format(std::ostream& os,Logger::ptr logger,LogLevel::Level level,LogEvent::ptr event) override{
os << event->getThreadId();
}
};
// 协程id
class FiberIdFormatItem : public LogFormatter::FormatItem{
public:
FiberIdFormatItem(const std::string & str = ""){}
void format(std::ostream& os,Logger::ptr logger,LogLevel::Level level,LogEvent::ptr event) override{
os << event->getFiberId();
}
};
//线程名
class ThreadNameFormat : public LogFormatter::FormatItem{
public:
ThreadNameFormat(const std::string & str = ""){}
void format(std::ostream& os,Logger::ptr logger,LogLevel::Level level,LogEvent::ptr event) override{
os << event->getThreadName();
}
};
//按指定格式输出时间
class DateTimeIdFormatItem : public LogFormatter::FormatItem{
public:
DateTimeIdFormatItem(const std::string & format = "%Y-%m-%d %H:%M:%S")
:m_format(format){
if(m_format.empty()){
m_format="%Y-%m-%d %H:%M:%S";
}
}
void format(std::ostream& os,Logger::ptr logger,LogLevel::Level level,LogEvent::ptr event) override{
struct tm tm;
time_t time = event->getTime();
localtime_r(&time,&tm);
char buf[64]={};
strftime(buf,sizeof(buf),m_format.c_str(),&tm);
os << buf;
}
private:
std::string m_format;
};
//文件名
class FilenameFormatItem : public LogFormatter::FormatItem{
public:
FilenameFormatItem(const std::string & str = ""){}
void format(std::ostream& os,Logger::ptr logger,LogLevel::Level level,LogEvent::ptr event) override{
os << event->getFile();
}
};
//行号
class LineFormatItem : public LogFormatter::FormatItem{
public:
LineFormatItem(const std::string & str = ""){}
void format(std::ostream& os,Logger::ptr logger,LogLevel::Level level,LogEvent::ptr event) override{
os << event->getLine();
}
};
//换行
class NewLineFormatItem : public LogFormatter::FormatItem{
public:
NewLineFormatItem(const std::string & str = ""){}
void format(std::ostream& os,Logger::ptr logger,LogLevel::Level level,LogEvent::ptr event) override{
os << std::endl;
}
};
//字符常量
class StringFormatItem : public LogFormatter::FormatItem{
public:
StringFormatItem(const std::string & str):
m_string(str) {}
void format(std::ostream& os,Logger::ptr logger,LogLevel::Level level,LogEvent::ptr event) override{
os << m_string;
}
private:
std::string m_string;
};
//制表符
class TabFormatItem : public LogFormatter::FormatItem{
public:
TabFormatItem(const std::string & str){}
void format(std::ostream& os,Logger::ptr logger,LogLevel::Level level,LogEvent::ptr event) override{
os << '\t';
}
private:
};
Logger::Logger(const std::string &name): m_name(name),m_level(LogLevel::DEBUG)
{
m_formatter.reset(new LogFormatter("%d{%Y-%m-%d %H:%M:%S}%T%t%T%N%T%F%T[%p]%T[%c]%T%f:%l%T%m%n"));
}
void Logger::log(LogLevel::Level level, LogEvent::ptr event)
{
if(level >= m_level){
auto z = shared_from_this();
MutexType::Lock lock(m_mutex);
if(!m_appender.empty()){
for(auto & i : m_appender){
i->log(z,level,event);
}
}else if(m_root){
m_root->log(level,event);
}
}
}
void Logger::debug(LogEvent::ptr event)
{
log(LogLevel::DEBUG,event);
}
void Logger::info(LogEvent::ptr event)
{
log(LogLevel::INFO,event);
}
void Logger::warn(LogEvent::ptr event)
{
log(LogLevel::WARN,event);
}
void Logger::fatal(LogEvent::ptr event)
{
log(LogLevel::FATAL,event);
}
void Logger::error(LogEvent::ptr event)
{
log(LogLevel::ERROR,event);
}
void Logger::addAppender(LogAppender::ptr appender)
{
MutexType::Lock lock(m_mutex);
if(!appender->getFormatter()){
MutexType::Lock lock(appender->m_mutex);
appender->m_formatter=m_formatter;
}
m_appender.push_back(appender);
}
void Logger::delAppender(LogAppender::ptr appender)
{
MutexType::Lock lock(m_mutex);
for(auto it = m_appender.begin();it!=m_appender.end();++it){
if(*it == appender){
m_appender.erase(it);
break;
}
}
}
void Logger::clearAppenders()
{
MutexType::Lock lock(m_mutex);
m_appender.clear();
}
void Logger::setFormatter(LogFormatter::ptr val)
{
MutexType::Lock lock(m_mutex);
m_formatter=val;
for(auto & i :m_appender){
MutexType::Lock ll(i->m_mutex);
if(!i->m_hasFormatter){
i->m_formatter=m_formatter;
}
}
}
void Logger::setFormatter(const std::string &val)
{
sylar::LogFormatter::ptr new_val(new sylar::LogFormatter(val));
if(new_val->isError()){
std::cout<<"Logger setFormatter name=" < <<"value = "< << std::endl; return; } // m_formatter=new_val; setFormatter(new_val); } LogFormatter::ptr Logger::getFormatter() { MutexType::Lock lock(m_mutex); return m_formatter; } std::string Logger::toYamlString() { MutexType::Lock lock(m_mutex); YAML::Node node; node["name"] = m_name; if(m_level != LogLevel::UNKNOW){ node["level"] = LogLevel::Tostring(m_level); } if(m_formatter){ node["formatter"] = m_formatter->getPattern(); } for(auto & i: m_appender){ node["appender"].push_back(YAML::Load(i->toYamlString())); } std::stringstream ss; ss << node; return ss.str(); } FileLogAppender::FileLogAppender(const std::string filename) : m_filename(filename) { reopen(); } void FileLogAppender::log(std::shared_ptr { if(level>=m_level){ MutexType::Lock lock(m_mutex); m_filestream << m_formatter->format(logger,level,event); } } std::string FileLogAppender::toYamlString() { MutexType::Lock lock(m_mutex); YAML::Node node; node["type"] = "FileLogAppender"; node["file"] = m_filename; if(m_level != LogLevel::UNKNOW){ node["level"] = LogLevel::Tostring(m_level); } if(m_hasFormatter && m_formatter){ node["formatter"] = m_formatter->getPattern(); } std::stringstream ss; ss << node; return ss.str(); } bool FileLogAppender::reopen() { MutexType::Lock lock(m_mutex); if(m_filestream){ m_filestream.close(); } m_filestream.open(m_filename); return !!m_filestream; } std::string StdoutLogAppender::toYamlString() { MutexType::Lock lock(m_mutex); YAML::Node node; node["type"] = "StdoutLogAppender"; if(m_level != LogLevel::UNKNOW){ node["level"] = LogLevel::Tostring(m_level); } if(m_hasFormatter&& m_formatter){ node["formatter"] = m_formatter->getPattern(); } std::stringstream ss; ss << node; return ss.str(); } void StdoutLogAppender::log(std::shared_ptr { if(level>=m_level){ MutexType::Lock lock(m_mutex); std::cout<< m_formatter->format(logger,level,event); } } LogFormatter::LogFormatter(const std::string pattern):m_pattern(pattern) { init(); } std::string LogFormatter::format(std::shared_ptr { std::stringstream ss; for(auto & i:m_items){ i->format(ss,logger,level,event); } return ss.str(); } //%xxx %xxx{xxx} %% void LogFormatter::init() { //str,format,type //type = 0 非转义 //type = 1 转义 std::vector //用于存非转义字符 std::string nstr; for(size_t i =0;i //非转义字符 if(m_pattern[i]!='%'){ nstr.append(1,m_pattern[i]); continue; } //处理%% if((i+1) if(m_pattern[i+1]=='%'){ nstr.append(1,'%'); ++i; continue; } } //遇到了% size_t n= i +1; //{的开始位置 size_t fmt_begin = 0; //是否进入{}的处理 int fmt_status = 0; //%str{fmt} size_t n = i + 1; int fmt_status = 0; size_t fmt_begin = 0; std::string str; std::string fmt; while(n < m_pattern.size()) { if(!fmt_status && (!isalpha(m_pattern[n]) && m_pattern[n] != '{' && m_pattern[n] != '}')) { str = m_pattern.substr(i + 1, n - i - 1); break; } if(fmt_status == 0) { if(m_pattern[n] == '{') { str = m_pattern.substr(i + 1, n - i - 1); //std::cout << "*" << str << std::endl; fmt_status = 1; //解析格式 fmt_begin = n; ++n; continue; } } else if(fmt_status == 1) { if(m_pattern[n] == '}') { fmt = m_pattern.substr(fmt_begin + 1, n - fmt_begin - 1); //std::cout << "#" << fmt << std::endl; fmt_status = 0; ++n; break; } } ++n; if(n == m_pattern.size()) { if(str.empty()) { str = m_pattern.substr(i + 1); } } } if(fmt_status == 0) { if(!nstr.empty()) { vec.push_back(std::make_tuple(nstr, std::string(), 0)); nstr.clear(); } vec.push_back(std::make_tuple(str, fmt, 1)); i = n - 1; } else if(fmt_status == 1) { std::cout << "pattern parse error: " << m_pattern << " - " << m_pattern.substr(i) << std::endl; m_error = true; vec.push_back(std::make_tuple("< } } if(!nstr.empty()){ vec.emplace_back(nstr,"",0); nstr.clear(); } //字符到仿函数的映射 static std::map #define XX(str,C) \ {#str,[](const std::string & fmt ){return FormatItem::ptr(new C(fmt));}} XX(m,MessageFormatItem), XX(p,LevelFormatItem), XX(r,ElapseFormatItem), XX(c,NameFormatItem), XX(t,ThreadIdFormatItem), XX(n,NewLineFormatItem), XX(d,DateTimeIdFormatItem), XX(f,FilenameFormatItem), XX(l,LineFormatItem), XX(T,TabFormatItem), XX(F,FiberIdFormatItem), XX(N,ThreadNameFormat) #undef XX }; for(auto & i:vec){ //字符常量 if(std::get<2>(i)==0){ m_items.push_back(FormatItem::ptr(new StringFormatItem(std::get<0>(i)))); } else { auto it = s_format_items.find(std::get<0>(i)); if(it == s_format_items.end()){ m_items.push_back(FormatItem::ptr(new StringFormatItem("< m_error = true; } else { //填入fmt，有些不需要就填个空串，但仿函数一定要参数统一 m_items.push_back(it->second(std::get<1>(i))); } } // std::cout << std::get<0>(i) << " - "< } //%m 消息体 //%p level //%r 启动后时间 //%c 日志名称 //%t 线程id //%n 回车换行 //%d 时间 //%d 文件名 //%l 行号 } LogEvent::LogEvent(Logger::ptr logger,LogLevel::Level level,const char * file , int32_t line , uint32_t elapse, uint32_t threadid,uint32_t fiberId,uint64_t time,const std::string & thread_name) :m_file(file),m_line(line),m_elapse(elapse),m_threadId(threadid),m_fiberId(fiberId), m_time(time),m_threadName(thread_name),m_logger(logger),m_level(level) { } //销毁后自动输出变量 //if语句后声明周期就结束了，配和宏一起用 LogEventWrap::~LogEventWrap() { m_event->getLogger()->log(m_event->getLevel(),m_event); } void LogEvent::format(const char *fmt, ...) { //处理变长参数的固定写法 va_list al; //将al指向fmt之后的一个位置 va_start(al,fmt); format(fmt,al); va_end(al); } void LogEvent::format(const char *fmt, va_list al) { char * buf = nullptr; //vasprintf 将al以fmt格式输出到buf里，buf内存自动分配 int len = vasprintf(&buf,fmt,al); if(len!=-1){ m_ss << std::string (buf,len); free(buf); } } LoggerManager::LoggerManager() { m_root.reset(new Logger); m_root->addAppender(LogAppender::ptr(new StdoutLogAppender)); m_logger[m_root->m_name] = m_root; init(); } Logger::ptr LoggerManager::getLogger(const std::string &name) { MutexType::Lock lock(m_mutex); auto it = m_logger.find(name); if(it != m_logger.end()){ return it->second; } Logger::ptr logger(new Logger(name)); logger->m_root = m_root; m_logger[name] = logger; return logger; } //以下部分为yaml和配置文件之间相互转化辅助用 //appender在yaml文件中只会输出类型，format，filename struct LogAppenderDefine{ int type = 0; LogLevel::Level level = LogLevel::Level::UNKNOW; std::string formatter; std::string file; bool operator==(const LogAppenderDefine & oth)const { return type==oth.type&& level == oth.level&& formatter == oth.formatter&& file == oth.file; } }; //同理，用于记录在yaml中log的信息 struct LogDefine { std::string name; LogLevel::Level level; std::string formatter; std::vector bool operator==(const LogDefine& oth)const { return name == oth.name && level == oth.level && formatter == oth.formatter && appenders == oth.appenders; } bool operator<(const LogDefine & oth) const{ return name < oth.name ; } }; //模板全特化 //string -> std::set template<> class LexicalCast public: std::set YAML::Node node = YAML::Load(v); std::set for(size_t i = 0;i const auto & n =node[i]; if(!n["name"].IsDefined()){ std::cout<<"log config error: name is null ,"< continue; } LogDefine id; id.name = n["name"].as id.level = LogLevel::FromString(n["level"].IsDefined()?n["level"].as if(n["formatter"].IsDefined()){ id.formatter = n["formatter"].as } if(n["appender"].IsDefined()){ for(size_t i= 0;i auto a =n["appender"][i]; if(!a["type"].IsDefined()){ std::cout<<"log config error: appender type is null ,"<
continue; } std::string type = a["type"].as LogAppenderDefine lad; if(type == "FileLogAppender"){ lad.type=1; if(!a["file"].IsDefined()){ std::cout<<"log config error: fileappender file is null ,"<
continue; } lad.file = a["file"].as if(a["formatter"].IsDefined()){ lad.formatter = a["formatter"].as } }else if(type == "StdoutLogAppender"){ lad.type=2; }else{