In your project, you will need to create 2 files:
my_app_log.h - where you declare your log(s)my_app_log.cpp - where you define and initialize your log(s)Again, this is just a starter project, you can customize it as you wish. Enjoy!
The my_app_log.h file
// my_app_log.h #ifndef my_app_LOG_H_header #define my_app_LOG_H_header #include <boost/logging/format_fwd.hpp> // uncomment if you're using Named Formatters and Destinations //#include <boost/logging/format/named_write_fwd.hpp> // uncomment if you want to do logging on a dedicated thread // #include <boost/logging/writer/on_dedicated_thread.hpp> namespace bl = boost::logging; typedef bl::tag::holder< // string class bl::optimize::cache_string_one_str<>, // tags bl::tag::thread_id, bl::tag::time> log_string_type; // note: if you don't use tags, you can simply use a string class: // typedef bl::optimize::cache_string_one_str<> log_string_type; BOOST_LOG_FORMAT_MSG( log_string_type ) using namespace boost::logging::scenario::usage; typedef use< // how often do you manipulate (change) the filter? filter_::change::often<10>, // does the filter use levels? filter_::level::no_levels, // how often do you manipulate (change) the logger? logger_::change::often<10>, // for the logger: do you favor speed or correctness? logger_::favor::correctness> finder; BOOST_DECLARE_LOG_FILTER(g_l_filter, finder::filter) BOOST_DECLARE_LOG(g_l, finder::logger) #define L_ BOOST_LOG_USE_LOG_IF_FILTER(g_l(), g_log_filter()->is_enabled() ) // initialize thy logs.. void init_logs(); #endif
The my_app_log.cpp file
// my_app_log.cpp #include "my_app_log.h" #include <boost/logging/format.hpp> #include <boost/logging/format/formatter/tags.hpp> // uncomment if you're using Named Formatters and Destinations // #include <boost/logging/format/named_write.hpp> using namespace boost::logging; BOOST_DEFINE_LOG_FILTER(g_log_filter, finder::filter ) BOOST_DEFINE_LOG(g_l, finder::logger) void init_logs() { // Add formatters and destinations // That is, how the message is to be formatted... g_l()->writer().add_formatter( formatter::tag::thread_id() ); g_l()->writer().add_formatter( formatter::tag::time("$hh:$mm.$ss ") ); g_l()->writer().add_formatter( formatter::idx() ); g_l()->writer().add_formatter( formatter::append_newline() ); // ... and where should it be written to g_l()->writer().add_destination( destination::cout() ); g_l()->writer().add_destination( destination::dbg_window() ); g_l()->writer().add_destination( destination::file("out.txt") ); g_l()->mark_as_initialized(); }