时间的痕迹

代码部分

  void

log4cplus :: PropertyConfigurator :: replaceEnvironVariables ()

{

std :: vector < log4cplus :: tstring > keys = properties . propertyNames ();

// 解析属性文件中的内容 , 需要定义什么是主属性 , 什么次属性

-- 注意 propertyName 以及 substEnvironVars

    std :: vector < log4cplus :: tstring >:: iterator   it = keys . begin ();

    for (; it != keys . end (); ++ it ) {

        log4cplus :: tstring   key = * it ;

        log4cplus :: tstring   val = properties . getProperty ( key );

        log4cplus :: tstring   subKey = substEnvironVars ( key , getLogLog ());

        if ( subKey != key ) {

            properties . removeProperty ( key );

            properties . setProperty ( subKey , val );

        }

        log4cplus :: tstring   subVal = substEnvironVars ( val , getLogLog ());

        if ( subVal != val ) {

            properties . setProperty ( subKey , subVal );

        }

    }

}

void

log4cplus :: PropertyConfigurator :: configureLoggers ()

{

    // 定义属性文件的属性项

    if ( properties . exists ( LOG4CPLUS_TEXT ( "rootLogger" ) )) {

        Logger   root = h . getRoot ();

        // 加载有关根 log 模块的信息

        configureLogger ( root ,

        properties . getProperty ( LOG4CPLUS_TEXT ( "rootLogger" )));

    }

    // 获取子属性部件

     Properties   loggerProperties =

            properties . getPropertySubset ( LOG4CPLUS_TEXT ( "logger." ));

vector < tstring > loggers = loggerProperties . propertyNames ();

// 注意 ConfigureLogger 部分的内容 , 获取有关属性值的描述

    for ( vector < tstring >:: iterator   it = loggers . begin (); it != loggers . end (); ++ it ) {

        Logger   log = getLogger (* it );

        configureLogger ( log , loggerProperties . getProperty (* it ));

    }

}

void

log4cplus :: PropertyConfigurator :: configureLogger ( log4cplus :: Logger   logger ,

                                                  const   log4cplus :: tstring & config )

{

    // Remove all spaces from config

tstring   configString ;

// 如何实现 trim 的功能，实现一个范型的方法调用

    remove_copy_if ( config . begin (), config . end (),

                   string_append_iterator < tstring >( configString ),

                   bind1st ( equal_to < tchar >(), ' ' ));

// "Tokenize" configString

// 分离字符部分的内容 , 按照   “,” 进行分隔

    vector < tstring > tokens ;

    tokenize ( configString , ',' ,

             back_insert_iterator < vector < tstring > >( tokens ));

    if ( tokens . size () == 0) {

        getLogLog (). error (  LOG4CPLUS_TEXT ( "PropertyConfigurator::configureLogger()- Invalid config string(Logger = " )

                          + logger . getName ()

                          + LOG4CPLUS_TEXT ( "): \"" )

                          + config  

                          + LOG4CPLUS_TEXT ( "\"" ));

        return ;

    }