boost log 打印源代码文件名和行号
我在我的 C++ 应用程序中使用 Boost(1.55.0) 登录.我已经能够生成这种格式的日志
I'm using Boost(1.55.0) Logging in my C++ application. I have been able to generate log of this format
[2014-Jul-15 10:47:26.137959]: <debug> A regular message
我希望能够在其中添加源文件名和行号日志生成.
I want to be able to add source file name and line number where the log is generated.
[2014-Jul-15 10:47:26.137959]: <debug> [filename:line_no] A regular message
示例:
[2014-Jul-15 10:47:26.137959]: <debug> [helloworld.cpp : 12] A regular message
源代码:
#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/utility/setup/file.hpp>
#include <boost/log/utility/setup/common_attributes.hpp>
#include <boost/log/sources/severity_logger.hpp>
#include <boost/log/sources/record_ostream.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/support/date_time.hpp>
#include <boost/log/attributes/attribute.hpp>
#include <boost/log/attributes/attribute_cast.hpp>
#include <boost/log/attributes/attribute_value.hpp>
#include <boost/make_shared.hpp>
#include <boost/property_tree/ptree.hpp>
namespace logging = boost::log;
namespace src = boost::log::sources;
namespace sinks = boost::log::sinks;
namespace keywords = boost::log::keywords;
void init()
{
logging::add_file_log
(
keywords::file_name = "sample_%N.log", /*< file name pattern >*/
keywords::rotation_size = 10*1024*1204, /*< rotate files every 10 MiB... >*/
keywords::time_based_rotation = sinks::file::rotation_at_time_point(0, 0, 0), /*< ...or at midnight >*/
keywords::format =
(
boost::log::expressions::stream
<< boost::log::expressions::format_date_time< boost::posix_time::ptime >("TimeStamp", "%Y-%m-%d_%H:%M:%S.%f")
<< ": <" << boost::log::trivial::severity << "> "
<< boost::log::expressions::smessage
)
);
}
int main(int, char*[])
{
init();
logging::add_common_attributes();
using namespace logging::trivial;
src::severity_logger< severity_level > lg;
BOOST_LOG_SEV(lg, debug) << "A regular message";
return 0;
}
推荐答案
我建议使用 boost::log::add_value()
函数.
定义:
#define LOG_LOCATION(LEVEL, MSG)
BOOST_LOG_SEV(logger::get(), LEVEL)
<< boost::log::add_value("Line", __LINE__)
<< boost::log::add_value("File", __FILE__)
<< boost::log::add_value("Function", __FUNCTION__) << MSG
然后您可以将其格式化如下:
And then you can format it as follows:
boost::log::add_common_attributes();
boost::log::register_simple_filter_factory<boost::log::trivial::severity_level, char>("Severity");
boost::log::register_simple_formatter_factory<boost::log::trivial::severity_level, char>("Severity");
auto syslog_format(
boost::log::expressions::stream <<
"[" << boost::log::expressions::format_date_time< boost::posix_time::ptime >("TimeStamp", "%Y-%m-%d %H:%M:%S") <<
"] [" << boost::log::expressions::attr<boost::log::attributes::current_thread_id::value_type>("ThreadID") <<
"] [" << std::left << std::setw(7) << std::setfill(' ') << boost::log::trivial::severity <<
"] " << boost::log::expressions::smessage <<
" (" << boost::log::expressions::attr<std::string>("Filename") <<
":" << boost::log::expressions::attr<int>("Line") <<
":" << boost::log::expressions::attr<std::string>("Function") <<
")"
);
boost::log::add_file_log(
boost::log::keywords::file_name = "sys_%d_%m_%Y.%N.log",
boost::log::keywords::format = syslog_format
);
无需添加全局属性,您可以轻松地将其格式化,如上所示.我发现这是其他人的解决方案和原始 __FILE__
__LINE__
方法之间的一个很好的折衷.
No need to add global attributes, and you can format it easily as seen above. I find this is a good compromise between other's solutions and the raw __FILE__
__LINE__
approach.
完整示例此处.
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