#pragma once

 #include "L4Cpp/Category.hh"

 class L4Cpp

 {

 private:

     L4Cpp(){};

     static log4cpp::Category* root;

 public:

     //获得日志仓库

     static log4cpp::Category* get();

     static void defaultFileInstance();

     static void defaultSteamInstance();

 };

 //LogFacade.cpp如下：

 #include "StdAfx.h"

 #include "L4Cpp.h"

 #include "L4Cpp/Appender.hh"

 #include "L4Cpp/FileAppender.hh"

 #include "L4Cpp/OstreamAppender.hh"

 #include "L4Cpp/NTEventLogAppender.hh"

 #include "L4Cpp/StringQueueAppender.hh"

 #include "L4Cpp/RollingFileAppender.hh"

 //#include "L4Cpp/SyslogAppender.hh"

 #include "L4Cpp/Layout.hh"

 #include "L4Cpp/BasicLayout.hh"

 #include "L4Cpp/SimpleLayout.hh"

 #include "L4Cpp/PatternLayout.hh"

 #include "L4Cpp/BasicConfigurator.hh"

 #include "L4Cpp/PropertyConfigurator.hh"

 #include "L4Cpp/Priority.hh"

 #include "L4Cpp/NDC.hh"

 #include <string.h>

 #pragma comment(lib,"log4cpp.lib")

 log4cpp::Category* L4Cpp::root = NULL;

 log4cpp::Category* L4Cpp::get()

 {

     if (!root)

     {

         //debug模式下，配置没找到会跳出runtime 异常，貌似捕获不了。考虑把那里注掉或换成logic_error

         try {

             log4cpp::PropertyConfigurator::configure("./log4cpp1.conf");

             root = &log4cpp::Category::getRoot();

         } catch(std::runtime_error e) {

             //读不到配置文件不操作

             //但外部调用并不会出错

         }

     }

     return root;

 }

 //加载默认配置，输出到同级目录中的logging.log文件

 void L4Cpp::defaultFileInstance(){

     if (!root)

     {

         log4cpp::Layout* layout = new log4cpp::BasicLayout();    // 1实例化一个layout 对象

         log4cpp::Appender* appender = new log4cpp::FileAppender("FileAppender",    "./hgsoft.log");     // 2. 初始化一个appender 对象

         appender->setLayout(layout);     // 3. 把layout对象附着在appender对象上

         root = &log4cpp::Category::getRoot();// 4. 实例化一个category对象

         root->setAdditivity(false);     // 5. 设置additivity为false，替换已有的appender

         root->setAppender(appender);     // 5. 把appender对象附到category上

         root->setPriority(log4cpp::Priority::DEBUG);     // 6. 设置category的优先级，低于此优先级的日志不被记录

     }

 } 

 void L4Cpp::defaultSteamInstance(){

     if (!root)

     {

         log4cpp::Layout* layout = new log4cpp::BasicLayout();    // 1实例化一个layout 对象

         log4cpp::Appender* appender = new log4cpp::OstreamAppender("ostream",&std::cout);     // 2. 初始化一个appender 对象

         appender->setLayout(layout);     // 3. 把layout对象附着在appender对象上

         root = &log4cpp::Category::getRoot();// 4. 实例化一个category对象

         root->setAdditivity(false);     // 5. 设置additivity为false，替换已有的appender

         root->setAppender(appender);     // 5. 把appender对象附到category上

         root->setPriority(log4cpp::Priority::DEBUG);     // 6. 设置category的优先级，低于此优先级的日志不被记录

     }

 }