每个类的不同的提升日志接收器 [英] Different boost log sinks for every class

问题描述

我是新的提升日志。

我的算法有4个主要步骤，我想在一个文件中记录每一步。所以我有4个水槽。我的想法是，我可以改变水槽的每一步。这是可能吗？

目前我有一个全局记录器 looger.h b
$ b

  #ifndef LOGGER_H_ 
 #define LOGGER_H_ 
 
 #include< boost / shared_ptr.hpp> 
 #include< boost / make_shared.hpp> 
 #include< boost / thread / thread.hpp> 
 #include< boost / log / core.hpp> 
 #include< boost / log / sinks / sync_frontend.hpp> 
 #include< boost / log / sinks / text_ostream_backend.hpp> 
 #include< boost / log / sources / record_ostream.hpp> 
 #include< boost / log / support / date_time.hpp> 
 #include< boost / log / common.hpp> 
 #include< boost / log / expressions.hpp> 
 #include< boost / log / attributes.hpp> 
 #include< boost / log / sinks.hpp> 
 #include< boost / log / sources / logger.hpp> 
 #include< boost / log / utility / setup / common_attributes.hpp> 
 #include< boost / log / utility / setup / common_attributes.hpp> 
 #include< boost / log / utility / setup / formatter_parser.hpp> 
 #include< boost / log /源/ severity_logger.hpp> 
 #include< boost / log /源/ severity_feature.hpp> 
 #include< fstream> 
 
命名空间logging = boost :: log; 
 namespace attrs = boost :: log :: attributes; 
 namespace src = boost :: log :: sources; 
 namespace sinks = boost :: log :: sinks; 
 namespace expr = boost :: log :: expressions; 
 namespace keywords = boost :: log :: keywords; 
 
 enum sign_severity_level {
 trace，
 debug，
 info，
 warning，
 error，
 fatal，
 report 
}; 
 
 void InitLog（）
 {
 typedef sinks :: synchronous_sink< sinks :: text_ostream_backend> TextSink; 
 
 // init sink1 
 boost :: shared_ptr< sinks :: text_ostream_backend> backend1 = boost :: make_shared< sinks :: text_ostream_backend>（）; 
 backend1-> add_stream（boost :: shared_ptr< std :: ostream>（new std :: ofstream（sign.log）））; 
 backend1-> auto_flush（true）; 
 boost :: shared_ptr< TextSink> sink1（new TextSink（backend1））; 
 sink1> set_formatter（
 expr :: format（[％1％]<％2％>（％3％）：％4％）％expr :: format_date_time& boost :: posix_time :: ptime 
>（TimeStamp，％Y-％m-％d％H：％M：％S）％expr :: attr< sign_severity_level& ）％expr :: attr 
< attrs :: current_thread_id :: value_type>（ThreadID）％expr :: smessage）; 
 sink1> set_filter（expr :: attr< sign_severity_level>（Severity）> = warning）; 
 logging :: core :: get（） - > add_sink（sink1）; 
 
 logging :: add_common_attributes（）; 
 logging :: core :: get（） - > add_global_attribute（ThreadID，attrs :: current_thread_id（））; 
} 
 BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT（my_logger，src :: severity_logger_mt< sign_severity_level>）
 
 
 #endif / * LOGGER_H_ * / 
  
解决方案
 
 
 
 div> 
您只需要更改接收器的流：
  void set_log_file（const char * filename）{
 backend _-> remove_stream（current_stream_）; 
 current_stream_.reset（new std :: ofstream（filename））; 
 backend _-> add_stream（current_stream_）; 
} 
  
用法：
  manager.set_log_file（log_1.txt）; 
 BOOST_LOG_SEV（log，error）<< 这将去log_1; 
 BOOST_LOG_SEV（log，error）<< 这一个; 
 
 manager.set_log_file（log_2.txt）; 
 BOOST_LOG_SEV（log，error）<< 这将转到log_2; 
 
 manager.set_log_file（log_3.txt）; 
 BOOST_LOG_SEV（log，error）<< 这将去log_3; 
  
结果：
 code>> cat log_1.txt 
 [...]< 4>（0x00007fe742977780）：这将转到log_1 
 [...] 4（0x00007fe742977780）：这一个
 > cat log_2.txt 
 [...]< 4>（0x00007fe742977780）：这将转到log_2 
> cat log_3.txt 
 [...]< 4>（0x00007fe742977780）：这将转到log_3 
  
 
 
 
 
 
完整示例： http://pastebin.com/e3qDQ8tT  
 
 
 
I am new to boost log. 

My algorithm has 4 main steps and I want the logging for every step in one file. So that I have 4 sinks. My idea is that I can change the sink on every step. Is that possible?

At the moment I have my looger.h with a global logger
#ifndef LOGGER_H_
#define LOGGER_H_

#include <boost/shared_ptr.hpp>
#include <boost/make_shared.hpp>
#include <boost/thread/thread.hpp>
#include <boost/log/core.hpp>
#include <boost/log/sinks/sync_frontend.hpp>
#include <boost/log/sinks/text_ostream_backend.hpp>
#include <boost/log/sources/record_ostream.hpp>
#include <boost/log/support/date_time.hpp>
#include <boost/log/common.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/attributes.hpp>
#include <boost/log/sinks.hpp>
#include <boost/log/sources/logger.hpp>
#include <boost/log/utility/setup/common_attributes.hpp>
#include <boost/log/utility/setup/common_attributes.hpp>
#include <boost/log/utility/setup/formatter_parser.hpp>
#include <boost/log/sources/severity_logger.hpp>
#include <boost/log/sources/severity_feature.hpp>
#include <fstream>

namespace logging = boost::log;
namespace attrs = boost::log::attributes;
namespace src = boost::log::sources;
namespace sinks = boost::log::sinks;
namespace expr = boost::log::expressions;
namespace keywords = boost::log::keywords;

enum sign_severity_level {
  trace,
  debug,
  info,
  warning,
  error,
  fatal,
  report
};

void InitLog()
{
    typedef sinks::synchronous_sink<sinks::text_ostream_backend> TextSink;

    // init sink1
    boost::shared_ptr<sinks::text_ostream_backend> backend1 = boost::make_shared<sinks::text_ostream_backend>();
    backend1->add_stream(boost::shared_ptr<std::ostream>(new std::ofstream("sign.log")));
    backend1->auto_flush(true);
    boost::shared_ptr<TextSink> sink1(new TextSink(backend1));
    sink1->set_formatter(
            expr::format("[%1%]<%2%>(%3%): %4%") % expr::format_date_time < boost::posix_time::ptime
                    > ("TimeStamp", "%Y-%m-%d %H:%M:%S") % expr::attr < sign_severity_level > ("Severity") % expr::attr
                    < attrs::current_thread_id::value_type > ("ThreadID") % expr::smessage);
    sink1->set_filter(expr::attr < sign_severity_level > ("Severity") >= warning);
    logging::core::get()->add_sink(sink1);

    logging::add_common_attributes();
    logging::core::get()->add_global_attribute("ThreadID", attrs::current_thread_id());
}
BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT(my_logger, src::severity_logger_mt<sign_severity_level>)


#endif /* LOGGER_H_ */ 
Is it possible to change the sink after every step?
解决方案
You need to change only stream of a sink:
void set_log_file(const char* filename) {
  backend_->remove_stream(current_stream_);
  current_stream_.reset(new std::ofstream(filename));
  backend_->add_stream(current_stream_);
}
Usage:
manager.set_log_file("log_1.txt");
BOOST_LOG_SEV(log, error) << "This will go to log_1";
BOOST_LOG_SEV(log, error) << "And this one";

manager.set_log_file("log_2.txt");
BOOST_LOG_SEV(log, error) << "This will go to log_2";

manager.set_log_file("log_3.txt");
BOOST_LOG_SEV(log, error) << "This will go to log_3";
Result:
> cat log_1.txt
[...]<4>(0x00007fe742977780): This will go to log_1
[...]<4>(0x00007fe742977780): And this one
> cat log_2.txt
[...]<4>(0x00007fe742977780): This will go to log_2
> cat log_3.txt
[...]<4>(0x00007fe742977780): This will go to log_3



Full example: http://pastebin.com/e3qDQ8tT


                        
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