log/example/doc/sources_severity_channel.cpp
2015-01-25 17:32:33 +03:00

111 lines
2.9 KiB
C++

/*
* 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/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_channel_logger.hpp>
#include <boost/log/sources/record_ostream.hpp>
#include <boost/log/sources/global_logger_storage.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_channel
enum severity_level
{
normal,
notification,
warning,
error,
critical
};
typedef src::severity_channel_logger_mt<
severity_level, // the type of the severity level
std::string // the type of the channel name
> my_logger_mt;
BOOST_LOG_INLINE_GLOBAL_LOGGER_INIT(my_logger, my_logger_mt)
{
// Specify the channel name on construction, similarly as with the channel_logger
return my_logger_mt(keywords::channel = "my_logger");
}
void logging_function()
{
// Do logging with the severity level. The record will have both
// the severity level and the channel name attached.
BOOST_LOG_SEV(my_logger::get(), normal) << "Hello, world!";
}
//]
// 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::attr< std::string >("Channel") << "] "
<< expr::smessage
);
logging::core::get()->add_sink(sink);
// Add attributes
logging::add_common_attributes();
}
int main(int, char*[])
{
init();
logging_function();
return 0;
}