Dean Chen Dean Chen - 8 days ago 7
C++ Question

why my format doesn't work in boost log

I am using

boost::log
in this function:

#include <boost/log/core.hpp>
#include <boost/log/trivial.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/utility/setup/file.hpp>

void InitLog() {
logging::core::get()->set_filter(logging::trivial::severity >= logging::trivial::debug);
logging::add_file_log(
keywords::file_name = AppHolder::Instance().config().log_folder + "/sign_%Y-%m-%d_%H-%M-%S.%N.log",
keywords::rotation_size = 10 * 1024 * 1024,
keywords::time_based_rotation = sinks::file::rotation_at_time_point(0, 0, 0),
keywords::format = "%TimeStamp% (%LineID%) <%Severity%>: %Message%"
);
}


Then, given the call:

BOOST_LOG_TRIVIAL(info) << "thread id: " << this_thread::get_id() << " Initialization succeeded";


Output is not as expected: timestamp, line id and severity are empty.


() <>: thread id: 7f58e30e8740 Initialization succeeded

Answer

After adding this, the problem was solved.

boost::log::register_simple_formatter_factory< boost::log::trivial::severity_level, char >("Severity");

Full code is located at my blog use boost log step 4