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: Bill Tian (billtian945_at_[hidden])
Date: 2015-01-14 21:50:15

Hi Igor, Thanks for your help!
Is that to say i MUST do other initialization when i use
BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT ?
Why does it initialized by boost::log::sources::severity_logger_mt ?

Best Regards,
Bill

On 1/14/15, Igor Mironchik <igor.mironchik_at_[hidden]> wrote:
> 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.