Boost Log 2.0：empty日志中的严重性级别 [英] Boost Log 2.0 : empty Severity level in logs
问题描述
我使用Boost-Log 2.0，它与版本1有一些不同，我很难输出Severity属性。
m使用Boost.Format-style格式化程序：％TimeStamp％[％Uptime％]（％LineID％）<％Severity％> ;:％Message％
TimeStamp ， LineID 和消息是 common_attributes 。 Uptime 是我使用 attrs :: timer（）添加的属性。我认为使用 severity_logger 时会自动添加严重性，但显然它不是，这是我的问题。我得到空的严重性，例如：
2013-Apr-06 19：21：52.408974 [00：00：00.001337] > ;:警告严重性消息
请注意空的<> 。我尝试使用 register_simple_formatter_factory 添加严重性，但后来得到编译器错误：
错误：没有匹配的函数调用'register_simple_formatter_factory（const char [9]）'
，我不明白为什么。 / p>
这是我的代码：
#include< iostream>
#include< boost / log / common.hpp>
#include< boost / log / core.hpp>
#include< boost / log / trivial.hpp>
#include< boost / log / expressions.hpp>
#include< boost / log / sinks / text_file_backend.hpp>
#include< boost / log / sinks / sync_frontend.hpp>
#include< boost / log / sinks / text_ostream_backend.hpp>
#include< boost / log / utility / setup / file.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< boost / log / sources / record_ostream.hpp>
#include< boost / log / attributes.hpp>
using namespace std;
命名空间logging = boost :: log;
namespace expr = boost :: log :: expressions;
namespace attrs = boost :: log :: attributes;
namespace src = boost :: log :: sources;
namespace keywords = boost :: log :: keywords;
枚举severity_level
{
DEBUG，
INFO，
警告，
错误，
CRITICAL
};
BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT（my_logger，src :: severity_logger_mt< severity_level>）
//严重性级别的格式化逻辑
模板< typename CharT，typename TraitsT>
inline std :: basic_ostream< CharT，TraitsT>&运算符<< （
std :: basic_ostream< CharT，TraitsT>& strm，severity_level lvl）
{
static const char * const str [] =
{
DEBUG，
INFO，
WARNING，
ERROR，
CRITICAL
};
if（static_cast< std :: size_t>（lvl）<（sizeof（str）/ sizeof（* str）））
strm< str [lvl];
else
strm<< static_cast< int>（lvl）;
return strm;
}
void init（）{
// logging :: register_simple_formatter_factory< severity_level>（Severity）;
logging :: add_file_log（
keywords :: file_name =blop.log，
keywords :: auto_flush = true，
keywords :: open_mode =（std :: ios： ：out | std :: ios :: app），
keywords :: format =％TimeStamp％[％Uptime％]（％LineID％）<％Severity％> ;:％Message％
）;
logging :: add_common_attributes（）;
logging :: core :: get（） - > add_global_attribute（Uptime，attrs :: timer（））;
}
int main（int argc，const char * argv []）{
init（）;
src :: severity_logger_mt< severity_level> lg = my_logger :: get（）;
BOOST_LOG_SEV（lg，DEBUG）< 调试严重性消息;
BOOST_LOG_SEV（lg，INFO）<< 信息严重性消息;
BOOST_LOG_SEV（lg，WARNING）<< 警告严重性消息;
BOOST_LOG_SEV（lg，ERROR）<< 错误严重性消息;
BOOST_LOG_SEV（lg，CRITICAL）<< 严重的严重性信息;
return 0;
}
注意注释掉的行：
// logging :: register_simple_formatter_factory<
g ++ main.cpp -Wall -DBOOST_ALL_DYN_LINK -lboost_system -lboost_log_setup -lboost_log -lboost_filesystem -lboost_date_time -lboost_thread -o main 任何帮助赞赏！
进入同样的问题（空白％严重％文件和尝试添加寄存器功能时相同的编译器错误）。
我发现对register_simple_formatter_factory的调用应该是：
boost :: log :: register_simple_formatter_factory< boost :: log :: trivial :: severity_level，char>（Severity）;
I'm using Boost-Log 2.0, which has some differences from version 1, and I have a hard time outputting the "Severity" attribute.
I'm using the "Boost.Format-style" formatters : "%TimeStamp% [%Uptime%] (%LineID%) <%Severity%>: %Message%"
TimeStamp, LineID, and Message are common_attributes. Uptime is an attribute I added using attrs::timer(). I thought that Severity was automatically added when using severity_logger, but apparently it isn't and that's my problem. I get empty severities, eg:
2013-Apr-06 19:21:52.408974 [00:00:00.001337] (3) <>: A warning severity message
Notice the empty <>. I've tried to add severity using register_simple_formatter_factory but then I get the compiler error :
error: no matching function for call to ‘register_simple_formatter_factory(const char [9])’
and I don't get why.
Here's my code :
#include <iostream>
#include <boost/log/common.hpp>
#include <boost/log/core.hpp>
#include <boost/log/trivial.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/sinks/text_file_backend.hpp>
#include <boost/log/sinks/sync_frontend.hpp>
#include <boost/log/sinks/text_ostream_backend.hpp>
#include <boost/log/utility/setup/file.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 <boost/log/sources/record_ostream.hpp>
#include <boost/log/attributes.hpp>
using namespace std;
namespace logging = boost::log;
namespace expr = boost::log::expressions;
namespace attrs = boost::log::attributes;
namespace src = boost::log::sources;
namespace keywords = boost::log::keywords;
enum severity_level
{
DEBUG,
INFO,
WARNING,
ERROR,
CRITICAL
};
BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT(my_logger, src::severity_logger_mt< severity_level> )
// The formatting logic for the severity level
template< typename CharT, typename TraitsT >
inline std::basic_ostream< CharT, TraitsT >& operator<< (
std::basic_ostream< CharT, TraitsT >& strm, severity_level lvl)
{
static const char* const str[] =
{
"DEBUG",
"INFO",
"WARNING",
"ERROR",
"CRITICAL"
};
if (static_cast< std::size_t >(lvl) < (sizeof(str) / sizeof(*str)))
strm << str[lvl];
else
strm << static_cast< int >(lvl);
return strm;
}
void init() {
// logging::register_simple_formatter_factory< severity_level >("Severity");
logging::add_file_log(
keywords::file_name = "blop.log",
keywords::auto_flush = true,
keywords::open_mode = (std::ios::out | std::ios::app),
keywords::format = "%TimeStamp% [%Uptime%] (%LineID%) <%Severity%>: %Message%"
);
logging::add_common_attributes();
logging::core::get()->add_global_attribute("Uptime", attrs::timer());
}
int main(int argc, const char *argv[]) {
init();
src::severity_logger_mt< severity_level > lg = my_logger::get();
BOOST_LOG_SEV(lg, DEBUG) << "A debug severity message";
BOOST_LOG_SEV(lg, INFO) << "An informational severity message";
BOOST_LOG_SEV(lg, WARNING) << "A warning severity message";
BOOST_LOG_SEV(lg, ERROR) << "An error severity message";
BOOST_LOG_SEV(lg, CRITICAL) << "A critical severity message";
return 0;
}
Notice the commented-out line :
// logging::register_simple_formatter_factory< severity_level >("Severity");
which produces the mentioned error.
I compile it with : g++ main.cpp -Wall -DBOOST_ALL_DYN_LINK -lboost_system -lboost_log_setup -lboost_log -lboost_filesystem -lboost_date_time -lboost_thread -o main
Any help appreciated!
Ran into the same problem (blank %Severity% in the log file AND the same compiler error when trying to add the register function). I found that the call to register_simple_formatter_factory should be:
boost::log::register_simple_formatter_factory< boost::log::trivial::severity_level, char >("Severity");
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