Re: [Boost-users] init log with BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT

Subject: Re: [Boost-users] init log with BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT
From: Igor Mironchik (igor.mironchik_at_[hidden])
Date: 2015-01-14 08:13:28

Hi. You missed this:

BOOST_LOG_ATTRIBUTE_KEYWORD( severity, "Severity", severity_level )
BOOST_LOG_ATTRIBUTE_KEYWORD(timestamp, "TimeStamp",  
boost::posix_time::ptime)

using namespace boost::log;

void init_logging()
{
        auto sink = boost::log::add_file_log
        (
                "sample.log",
                keywords::format = expressions::stream
                        << expressions::format_date_time( timestamp, "%Y-%m-%d, %H:%M:%S.%f" )
                        << " <" << severity.or_default(normal)
                        << "> " << expressions::message
        );

        // The sink will perform character code conversion as needed, according  
to the locale set with imbue()
        std::locale loc = boost::locale::generator()("en_US.UTF-8");
        sink->imbue(loc);

        // Let's add some commonly used attributes, like timestamp and record  
counter.
        boost::log::add_common_attributes();
}

On Wed, 14 Jan 2015 14:02:49 +0300, Bill Tian <billtian945_at_[hidden]>  
wrote:

> Hi guys,
> I want to define a global logger that can be used in other place.
> The severity level always be "info".
> I init the log like this:
>
> #include <cstdlib>
> #include <boost/log/trivial.hpp>
> #include <boost/log/core.hpp>
> #include <boost/log/sources/global_logger_storage.hpp>
> #include <boost/log/sources/severity_logger.hpp>
> #include <boost/log/sources/record_ostream.hpp>
> #include <boost/log/sources/severity_feature.hpp>
>
>
> // Here we define our application severity levels.
> enum severity_level
> {
>    normal,
>    notification,
>    warning,
>    error,
>    critical
> };
>
> // 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[] =
>    {
>        "normal",
>        "notification",
>        "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;
> }
>
> //  Global logger declaration
> BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT(test_lg,
>    boost::log::sources::severity_logger_mt<severity_level>)
>
> void try_logging()
> {
>    boost::log::sources::severity_logger_mt<severity_level>& lg =  
> test_lg::get();
>
>    // TODO:
>    // always write "info" record, Unknown reason!
>    BOOST_LOG_SEV(lg, normal) << "This is a normal severity record";
>    BOOST_LOG_SEV(lg, notification) << "This is a notification severity  
> record";
>    BOOST_LOG_SEV(lg, warning) << "This is a warning severity record";
>    BOOST_LOG_SEV(lg, error) << "This is a error severity record";
>    BOOST_LOG_SEV(lg, critical) << "This is a critical severity record";
> }
>
> int main(int argc, char* argv[])
> {
>    try_logging();
>
>    return EXIT_SUCCESS;
> }
>
> In the log i got this:
> [2015-01-14 19:00:34.800935] [0x40000300] [info]    This is a normal  
> severity re
> cord
> [2015-01-14 19:00:34.805935] [0x40000300] [info]    This is a  
> notification sever
> ity record
> [2015-01-14 19:00:34.806935] [0x40000300] [info]    This is a warning  
> severity r
> ecord
> [2015-01-14 19:00:34.806935] [0x40000300] [info]    This is a error  
> severity rec
> ord
> [2015-01-14 19:00:34.806935] [0x40000300] [info]    This is a critical  
> severity
> record
>
> What do i miss?
> Thank you!
>
> Bill

-- 
Best Regards,
Igor Mironchik.