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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 <cstddef>
- #include <string>
- #include <ostream>
- #include <fstream>
- #include <boost/move/utility_core.hpp>
- #include <boost/smart_ptr/shared_ptr.hpp>
- #include <boost/smart_ptr/make_shared_object.hpp>
- #include <boost/log/core.hpp>
- #include <boost/log/expressions.hpp>
- #include <boost/log/sources/severity_logger.hpp>
- #include <boost/log/sources/record_ostream.hpp>
- #include <boost/log/sinks/sync_frontend.hpp>
- #include <boost/log/sinks/text_ostream_backend.hpp>
- #include <boost/log/utility/setup/common_attributes.hpp>
- namespace logging = boost::log;
- namespace src = boost::log::sources;
- namespace expr = boost::log::expressions;
- namespace sinks = boost::log::sinks;
- namespace attrs = boost::log::attributes;
- namespace keywords = boost::log::keywords;
- //[ example_sources_severity
- // We define our own severity levels
- enum severity_level
- {
- normal,
- notification,
- warning,
- error,
- critical
- };
- void logging_function()
- {
- // The logger implicitly adds a source-specific attribute 'Severity'
- // of type 'severity_level' on construction
- src::severity_logger< severity_level > slg;
- BOOST_LOG_SEV(slg, normal) << "A regular message";
- BOOST_LOG_SEV(slg, warning) << "Something bad is going on but I can handle it";
- BOOST_LOG_SEV(slg, critical) << "Everything crumbles, shoot me now!";
- }
- //]
- //[ example_sources_default_severity
- void default_severity()
- {
- // The default severity can be specified in constructor.
- src::severity_logger< severity_level > error_lg(keywords::severity = error);
- BOOST_LOG(error_lg) << "An error level log record (by default)";
- // The explicitly specified level overrides the default
- BOOST_LOG_SEV(error_lg, warning) << "A warning level log record (overrode the default)";
- }
- //]
- //[ example_sources_severity_manual
- void manual_logging()
- {
- src::severity_logger< severity_level > slg;
- logging::record rec = slg.open_record(keywords::severity = normal);
- if (rec)
- {
- logging::record_ostream strm(rec);
- strm << "A regular message";
- strm.flush();
- slg.push_record(boost::move(rec));
- }
- }
- //]
- // The operator puts a human-friendly representation of the severity level to the stream
- std::ostream& operator<< (std::ostream& strm, severity_level level)
- {
- static const char* strings[] =
- {
- "normal",
- "notification",
- "warning",
- "error",
- "critical"
- };
- if (static_cast< std::size_t >(level) < sizeof(strings) / sizeof(*strings))
- strm << strings[level];
- else
- strm << static_cast< int >(level);
- return strm;
- }
- 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
- (
- expr::stream
- << expr::attr< unsigned int >("LineID")
- << ": <" << expr::attr< severity_level >("Severity")
- << ">\t"
- << expr::smessage
- );
- logging::core::get()->add_sink(sink);
- // Add attributes
- logging::add_common_attributes();
- }
- int main(int, char*[])
- {
- init();
- logging_function();
- default_severity();
- manual_logging();
- return 0;
- }
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