New implementation on logger

I suppose to work on the logger but due to some unit test code has not been integrated with the PUGI XML, I worry that base code might have some flaw in it. I have to focus myself to complete this before moving on to the next task. It took me a few weeks to clean my mess. For now, it is time for me to clear my doubt on the logger. Before this, I am using a very simple method to show my log in the console output:

...

BOOST_LOG_TRIVIAL(info) << "my log message";

...

I don't have a proper file logger implement yet, I've been thinking to use log4cxx but then I give up since I begin it with Boost Log. From my experience on log4j, to implement a file logger in Boost Log, it would be a simple task to do provided I have followed the documentation. Otherwise, it's going to be so hard to do it. I found a working sample used for logging the file name and file number in the log in StackOverflow. This is what I need to do for my case, I define my logger in FileBot.h:

...

#define LOGGER(logger, sev) \
    BOOST_LOG_STREAM_WITH_PARAMS( \
        (logger), \
        (set_get_attrib("FILE", path_to_filename(__FILE__))) \
        (set_get_attrib("LINE", __LINE__)) \
        (::boost::log::keywords::severity = (boost::log::trivial::sev)) \
    )

...

The the bunch of utility function mention in the above #define in CPP file.

...

template<typename valuetype="">
ValueType set_get_attrib(const char* name, ValueType value)
{
    auto attr = logging::attribute_cast<logging::attributes::mutable_constant aluetype="">>(logging::core::get()->get_thread_attributes()[name]);
    attr.set(value);
    return attr.get();
}

std::string path_to_filename(std::string path)
{
    return path.substr(path.find_last_of("/\\")+1);
}

...

And then the initialize code in FileBot constructor:

...

FileBot::FileBot()
{
    logging::core::get()->add_thread_attribute("FILE", boost::log::attributes::mutable_constant<string>(""));
    logging::core::get()->add_thread_attribute("LINE", boost::log::attributes::mutable_constant<int>(0));

    logging::add_file_log
    (
       logging::keywords::file_name = "/home/kokhoe/workspaceqt/debug/sample_%N.log",
       logging::keywords::rotation_size = 10 * 1024 * 1024,
       logging::keywords::time_based_rotation = logging::sinks::file::rotation_at_time_point(0, 0, 0),
       logging::keywords::format = (
                expr::stream
                      << expr::format_date_time< boost::posix_time::ptime >("TimeStamp", "%Y-%m-%d %H:%M:%S")
                      << " [" << boost::log::trivial::severity << "] "
                      << '['   << expr::attr<std::string>("FILE")
                               << ':' << expr::attr<int>("LINE") << "] "
                      << expr::smessage
       )
    );

    logging::add_common_attributes();

...

The usage of the code is simply

...

LOGGER(lg, info) << "my log message";
...

Then the output will show this:

2019-02-19 22:03:26 [info] [FileBot.cpp:426] my log message