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- /*
- * Copyright Andrey Semashev 2007 - 2015.
- * Distributed under the Boost Software License, Version 1.0.
- * (See accompanying file LICENSE_1_0.txt or copy at
- * http://www.boost.org/LICENSE_1_0.txt)
- */
- #include <ostream>
- #include <fstream>
- #include <boost/smart_ptr/shared_ptr.hpp>
- #include <boost/smart_ptr/make_shared_object.hpp>
- #include <boost/optional.hpp>
- #include <boost/log/core.hpp>
- #include <boost/log/trivial.hpp>
- #include <boost/log/expressions.hpp>
- #include <boost/log/sinks/sync_frontend.hpp>
- #include <boost/log/sinks/text_ostream_backend.hpp>
- #include <boost/log/sources/severity_logger.hpp>
- #include <boost/log/sources/record_ostream.hpp>
- #include <boost/log/utility/formatting_ostream.hpp>
- #include <boost/log/utility/setup/common_attributes.hpp>
- #include <boost/log/attributes/value_extraction.hpp>
- namespace logging = boost::log;
- namespace src = boost::log::sources;
- namespace expr = boost::log::expressions;
- namespace sinks = boost::log::sinks;
- //[ example_tutorial_formatters_custom
- void my_formatter(logging::record_view const& rec, logging::formatting_ostream& strm)
- {
- // Get the LineID attribute value and put it into the stream
- strm << logging::extract< unsigned int >("LineID", rec) << ": ";
- // The same for the severity level.
- // The simplified syntax is possible if attribute keywords are used.
- strm << "<" << rec[logging::trivial::severity] << "> ";
- // Finally, put the record message to the stream
- strm << rec[expr::smessage];
- }
- void init()
- {
- typedef sinks::synchronous_sink< sinks::text_ostream_backend > text_sink;
- boost::shared_ptr< text_sink > sink = boost::make_shared< text_sink >();
- sink->locked_backend()->add_stream(
- boost::make_shared< std::ofstream >("sample.log"));
- sink->set_formatter(&my_formatter);
- logging::core::get()->add_sink(sink);
- }
- //]
- int main(int, char*[])
- {
- init();
- logging::add_common_attributes();
- using namespace logging::trivial;
- src::severity_logger< severity_level > lg;
- BOOST_LOG_SEV(lg, trace) << "A trace severity message";
- BOOST_LOG_SEV(lg, debug) << "A debug severity message";
- BOOST_LOG_SEV(lg, info) << "An informational severity message";
- BOOST_LOG_SEV(lg, warning) << "A warning severity message";
- BOOST_LOG_SEV(lg, error) << "An error severity message";
- BOOST_LOG_SEV(lg, fatal) << "A fatal severity message";
- return 0;
- }
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