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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 <fstream>
- #include <boost/smart_ptr/shared_ptr.hpp>
- #include <boost/smart_ptr/make_shared_object.hpp>
- #include <boost/move/utility_core.hpp>
- #include <boost/log/core.hpp>
- #include <boost/log/expressions.hpp>
- #include <boost/log/attributes/constant.hpp>
- #include <boost/log/attributes/scoped_attribute.hpp>
- #include <boost/log/attributes/attribute_value_impl.hpp>
- #include <boost/log/sources/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>
- #include <boost/log/utility/manipulators/add_value.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;
- BOOST_LOG_ATTRIBUTE_KEYWORD(line_id, "LineID", unsigned int)
- BOOST_LOG_ATTRIBUTE_KEYWORD(remote_address, "RemoteAddress", std::string)
- BOOST_LOG_ATTRIBUTE_KEYWORD(received_size, "ReceivedSize", std::size_t)
- BOOST_LOG_ATTRIBUTE_KEYWORD(sent_size, "SentSize", std::size_t)
- //[ example_sources_network_connection
- class network_connection
- {
- src::logger m_logger;
- logging::attribute_set::iterator m_remote_addr;
- public:
- void on_connected(std::string const& remote_addr)
- {
- // Put the remote address into the logger to automatically attach it
- // to every log record written through the logger
- m_remote_addr = m_logger.add_attribute("RemoteAddress",
- attrs::constant< std::string >(remote_addr)).first;
- // The straightforward way of logging
- if (logging::record rec = m_logger.open_record())
- {
- rec.attribute_values().insert("Message",
- attrs::make_attribute_value(std::string("Connection established")));
- m_logger.push_record(boost::move(rec));
- }
- }
- void on_disconnected()
- {
- // The simpler way of logging: the above "if" condition is wrapped into a neat macro
- BOOST_LOG(m_logger) << "Connection shut down";
- // Remove the attribute with the remote address
- m_logger.remove_attribute(m_remote_addr);
- }
- void on_data_received(std::size_t size)
- {
- // Put the size as an additional attribute
- // so it can be collected and accumulated later if needed.
- // The attribute will be attached only to this log record.
- BOOST_LOG(m_logger) << logging::add_value("ReceivedSize", size) << "Some data received";
- }
- void on_data_sent(std::size_t size)
- {
- BOOST_LOG(m_logger) << logging::add_value("SentSize", size) << "Some data sent";
- }
- };
- //]
- int main(int, char*[])
- {
- // Construct the sink
- typedef sinks::synchronous_sink< sinks::text_ostream_backend > text_sink;
- boost::shared_ptr< text_sink > sink = boost::make_shared< text_sink >();
- // Add a stream to write log to
- sink->locked_backend()->add_stream(
- boost::make_shared< std::ofstream >("sample.log"));
- // Set the formatter
- sink->set_formatter
- (
- expr::stream
- << line_id
- << ": [" << remote_address << "] "
- << expr::if_(expr::has_attr(received_size))
- [
- expr::stream << "[Received: " << received_size << "] "
- ]
- << expr::if_(expr::has_attr(sent_size))
- [
- expr::stream << "[Sent: " << sent_size << "] "
- ]
- << expr::smessage
- );
- // Register the sink in the logging core
- logging::core::get()->add_sink(sink);
- // Register other common attributes, such as time stamp and record counter
- logging::add_common_attributes();
- // Emulate network activity
- network_connection conn;
- conn.on_connected("11.22.33.44");
- conn.on_data_received(123);
- conn.on_data_sent(321);
- conn.on_disconnected();
- return 0;
- }
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