Re: [Boost-users] [Log] Extract severity value

Subject: Re: [Boost-users] [Log] Extract severity value
From: Olivier Tournaire (olitour_at_[hidden])
Date: 2014-03-21 10:00:39

Hi all,

Anyone on this?

Regards,
Olivier

2014-03-15 1:25 GMT+01:00 Olivier Tournaire <olitour_at_[hidden]>:

> Hi all,
>
> I am trying to extract severity level from a log record, but i seems that
> I am doing it the wrong way. Here is the code I use:
>
> void LogDockWidget::receiveLog(boost::log::record_view const& rec, const
> std::string& log)
> {
>     logging::value_ref< logging::trivial::severity_level > level =
> logging::extract< logging::trivial::severity_level >("Severity", rec);
>     // ...
> }
>
> Here level.get() always returns "info". All my logs are done with the
> BOOST_LOG_TRIVIAL(...) macro. The formatter whereas displays correctly the
> severity level. Here is how it is defined:
>
> void LogDockWidget::init_logging()
> {
>     boost::shared_ptr< logging::core > core = logging::core::get();
>
>     typedef sinks::synchronous_sink< QTextEditFormattedSinkBackend >
> sink_t;
>     boost::shared_ptr< sink_t > sink(new sink_t);
>
>     // ...
>
>     logging::add_file_log( keywords::file_name = logFilename,
>                            keywords::auto_flush = true,
>                            keywords::format = ( BUILD_LOG_FORMATTER() )
>                          );
>
>     sink->set_formatter( BUILD_LOG_FORMATTER() );
>
>     core->add_sink(sink);
>
>     // Add attributes that we will use
>     logging::add_common_attributes();
>     core->add_global_attribute( "ThreadID", attrs::current_thread_id());
> }
>
> #define BUILD_LOG_FORMATTER() \
>     expr::stream \
>     << "[" << expr::format_date_time< boost::posix_time::ptime
> >("TimeStamp", "%Y-%m-%d %H:%M:%S") << "] " \
>     << expr::attr<unsigned int>("LineID") << " " \
>     << ": <" << logging::trivial::severity << "> " \
>     << " [" <<
> expr::attr<attrs::current_thread_id::value_type>("ThreadID") << "] " \
>     << expr::if_(expr::has_attr(scope_attribute)) \
>         [ \
>             expr::stream << "[" << scope_attribute << "] " \
>         ] \
>     << expr::message
>
> Could you please let me know what I am doing wrong?
>
> Regards,
>
> Olivier
>