135 lines
3.5 KiB
C++
135 lines
3.5 KiB
C++
/*
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* Copyright Andrey Semashev 2007 - 2015.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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#include <cstddef>
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#include <string>
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#include <ostream>
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#include <fstream>
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#include <boost/move/utility_core.hpp>
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#include <boost/smart_ptr/shared_ptr.hpp>
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#include <boost/smart_ptr/make_shared_object.hpp>
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#include <boost/log/core.hpp>
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#include <boost/log/expressions.hpp>
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#include <boost/log/sources/severity_logger.hpp>
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#include <boost/log/sources/record_ostream.hpp>
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#include <boost/log/sinks/sync_frontend.hpp>
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#include <boost/log/sinks/text_ostream_backend.hpp>
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#include <boost/log/utility/setup/common_attributes.hpp>
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namespace logging = boost::log;
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namespace src = boost::log::sources;
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namespace expr = boost::log::expressions;
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namespace sinks = boost::log::sinks;
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namespace attrs = boost::log::attributes;
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namespace keywords = boost::log::keywords;
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//[ example_sources_severity
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// We define our own severity levels
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enum severity_level
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{
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normal,
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notification,
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warning,
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error,
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critical
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};
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void logging_function()
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{
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// The logger implicitly adds a source-specific attribute 'Severity'
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// of type 'severity_level' on construction
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src::severity_logger< severity_level > slg;
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BOOST_LOG_SEV(slg, normal) << "A regular message";
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BOOST_LOG_SEV(slg, warning) << "Something bad is going on but I can handle it";
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BOOST_LOG_SEV(slg, critical) << "Everything crumbles, shoot me now!";
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}
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//]
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//[ example_sources_default_severity
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void default_severity()
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{
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// The default severity can be specified in constructor.
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src::severity_logger< severity_level > error_lg(keywords::severity = error);
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BOOST_LOG(error_lg) << "An error level log record (by default)";
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// The explicitly specified level overrides the default
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BOOST_LOG_SEV(error_lg, warning) << "A warning level log record (overrode the default)";
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}
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//]
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//[ example_sources_severity_manual
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void manual_logging()
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{
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src::severity_logger< severity_level > slg;
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logging::record rec = slg.open_record(keywords::severity = normal);
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if (rec)
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{
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logging::record_ostream strm(rec);
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strm << "A regular message";
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strm.flush();
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slg.push_record(boost::move(rec));
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}
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}
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//]
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// The operator puts a human-friendly representation of the severity level to the stream
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std::ostream& operator<< (std::ostream& strm, severity_level level)
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{
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static const char* strings[] =
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{
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"normal",
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"notification",
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"warning",
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"error",
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"critical"
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};
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if (static_cast< std::size_t >(level) < sizeof(strings) / sizeof(*strings))
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strm << strings[level];
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else
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strm << static_cast< int >(level);
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return strm;
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}
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void init()
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{
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typedef sinks::synchronous_sink< sinks::text_ostream_backend > text_sink;
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boost::shared_ptr< text_sink > sink = boost::make_shared< text_sink >();
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sink->locked_backend()->add_stream(
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boost::make_shared< std::ofstream >("sample.log"));
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sink->set_formatter
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(
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expr::stream
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<< expr::attr< unsigned int >("LineID")
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<< ": <" << expr::attr< severity_level >("Severity")
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<< ">\t"
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<< expr::smessage
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);
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logging::core::get()->add_sink(sink);
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// Add attributes
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logging::add_common_attributes();
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}
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int main(int, char*[])
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{
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init();
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logging_function();
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default_severity();
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manual_logging();
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return 0;
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}
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