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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 <string>
- #include <fstream>
- #include <iostream>
- #include <boost/smart_ptr/shared_ptr.hpp>
- #include <boost/core/null_deleter.hpp>
- #include <boost/log/core.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_channel_logger.hpp>
- #include <boost/log/sources/record_ostream.hpp>
- namespace logging = boost::log;
- namespace src = boost::log::sources;
- namespace expr = boost::log::expressions;
- namespace sinks = boost::log::sinks;
- namespace keywords = boost::log::keywords;
- //[ example_sinks_sync
- enum severity_level
- {
- normal,
- warning,
- error
- };
- // Complete sink type
- typedef sinks::synchronous_sink< sinks::text_ostream_backend > sink_t;
- void init_logging()
- {
- boost::shared_ptr< logging::core > core = logging::core::get();
- // Create a backend and initialize it with a stream
- boost::shared_ptr< sinks::text_ostream_backend > backend =
- boost::make_shared< sinks::text_ostream_backend >();
- backend->add_stream(
- boost::shared_ptr< std::ostream >(&std::clog, boost::null_deleter()));
- // Wrap it into the frontend and register in the core
- boost::shared_ptr< sink_t > sink(new sink_t(backend));
- core->add_sink(sink);
- // You can manage filtering and formatting through the sink interface
- sink->set_filter(expr::attr< severity_level >("Severity") >= warning);
- sink->set_formatter
- (
- expr::stream
- << "Level: " << expr::attr< severity_level >("Severity")
- << " Message: " << expr::smessage
- );
- // You can also manage backend in a thread-safe manner
- {
- sink_t::locked_backend_ptr p = sink->locked_backend();
- p->add_stream(boost::make_shared< std::ofstream >("sample.log"));
- } // the backend gets released here
- }
- //]
- int main(int, char*[])
- {
- init_logging();
- src::severity_channel_logger< severity_level > lg(keywords::channel = "net");
- BOOST_LOG_SEV(lg, warning) << "Hello world!";
- return 0;
- }
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