77 lines
2.2 KiB
C++
77 lines
2.2 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 <string>
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#include <iostream>
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#include <boost/smart_ptr/shared_ptr.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/sinks/unlocked_frontend.hpp>
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#include <boost/log/sinks/basic_sink_backend.hpp>
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#include <boost/log/sinks/frontend_requirements.hpp>
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#include <boost/log/sources/severity_channel_logger.hpp>
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#include <boost/log/sources/record_ostream.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 keywords = boost::log::keywords;
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//[ example_sinks_unlocked
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enum severity_level
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{
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normal,
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warning,
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error
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};
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// A trivial sink backend that requires no thread synchronization
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class my_backend :
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public sinks::basic_sink_backend< sinks::concurrent_feeding >
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{
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public:
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// The function is called for every log record to be written to log
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void consume(logging::record_view const& rec)
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{
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// We skip the actual synchronization code for brevity
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std::cout << rec[expr::smessage] << std::endl;
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}
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};
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// Complete sink type
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typedef sinks::unlocked_sink< my_backend > sink_t;
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void init_logging()
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{
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boost::shared_ptr< logging::core > core = logging::core::get();
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// The simplest way, the backend is default-constructed
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boost::shared_ptr< sink_t > sink1(new sink_t());
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core->add_sink(sink1);
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// One can construct backend separately and pass it to the frontend
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boost::shared_ptr< my_backend > backend(new my_backend());
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boost::shared_ptr< sink_t > sink2(new sink_t(backend));
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core->add_sink(sink2);
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// You can manage filtering through the sink interface
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sink1->set_filter(expr::attr< severity_level >("Severity") >= warning);
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sink2->set_filter(expr::attr< std::string >("Channel") == "net");
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}
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//]
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int main(int, char*[])
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{
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init_logging();
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src::severity_channel_logger< severity_level > lg(keywords::channel = "net");
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BOOST_LOG_SEV(lg, normal) << "Hello world!";
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return 0;
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}
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