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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)
*/
/*!
* \file main.cpp
* \author Andrey Semashev
* \date 26.04.2008
*
* \brief This example shows how to perform logging to several files simultaneously,
* with files being created on an attribute value basis - thread identifier in this case.
* In the example the application creates a number of threads and registers thread
* identifiers as attributes. Every thread performs logging, and the sink separates
* log records from different threads into different files.
*/
// #define BOOST_LOG_DYN_LINK 1
#include <stdexcept>
#include <thread>
#include <string>
#include <iostream>
#include <boost/smart_ptr/shared_ptr.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/log/common.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/attributes.hpp>
#include <boost/log/sources/logger.hpp>
#include <boost/log/sinks/sync_frontend.hpp>
#include <boost/log/sinks/text_multifile_backend.hpp>
namespace logging = boost::log;
namespace attrs = boost::log::attributes;
namespace src = boost::log::sources;
namespace sinks = boost::log::sinks;
namespace expr = boost::log::expressions;
namespace keywords = boost::log::keywords;
using boost::shared_ptr;
enum
{
THREAD_COUNT = 5,
LOG_RECORDS_TO_WRITE = 10
};
// Global logger declaration
BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT(my_logger, src::logger_mt)
// This function is executed in a separate thread
void thread_foo()
{
BOOST_LOG_SCOPED_THREAD_TAG("ThreadID", std::this_thread::get_id());
for (unsigned int i = 0; i < LOG_RECORDS_TO_WRITE; ++i)
{
BOOST_LOG(my_logger::get()) << "Log record " << i;
}
}
int main(int argc, char* argv[])
{
try
{
// Create a text file sink
typedef sinks::synchronous_sink< sinks::text_multifile_backend > file_sink;
shared_ptr< file_sink > sink(new file_sink);
// Set up how the file names will be generated
sink->locked_backend()->set_file_name_composer(sinks::file::as_file_name_composer(
expr::stream << "logs/" << expr::attr< std::thread::id >("ThreadID") << ".log"));
// Set the log record formatter
sink->set_formatter
(
expr::format("%1%: [%2%] - %3%")
% expr::attr< unsigned int >("RecordID")
% expr::attr< boost::posix_time::ptime >("TimeStamp")
% expr::smessage
);
// Add it to the core
logging::core::get()->add_sink(sink);
// Add some attributes too
logging::core::get()->add_global_attribute("TimeStamp", attrs::local_clock());
logging::core::get()->add_global_attribute("RecordID", attrs::counter< unsigned int >());
// Create threads and make some logs
std::thread threads[THREAD_COUNT];
for (unsigned int i = 0; i < THREAD_COUNT; ++i)
threads[i] = std::thread(&thread_foo);
for (unsigned int i = 0; i < THREAD_COUNT; ++i)
threads[i].join();
return 0;
}
catch (std::exception& e)
{
std::cout << "FAILURE: " << e.what() << std::endl;
return 1;
}
}
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