106 lines
3.2 KiB
C++
106 lines
3.2 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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/*!
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* \file main.cpp
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* \author Andrey Semashev
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* \date 26.04.2008
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*
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* \brief This example shows how to perform logging to several files simultaneously,
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* with files being created on an attribute value basis - thread identifier in this case.
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* In the example the application creates a number of threads and registers thread
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* identifiers as attributes. Every thread performs logging, and the sink separates
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* log records from different threads into different files.
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*/
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// #define BOOST_LOG_DYN_LINK 1
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#include <stdexcept>
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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/thread/thread.hpp>
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#include <boost/date_time/posix_time/posix_time.hpp>
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#include <boost/log/common.hpp>
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#include <boost/log/expressions.hpp>
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#include <boost/log/attributes.hpp>
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#include <boost/log/sources/logger.hpp>
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#include <boost/log/sinks/sync_frontend.hpp>
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#include <boost/log/sinks/text_multifile_backend.hpp>
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namespace logging = boost::log;
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namespace attrs = boost::log::attributes;
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namespace src = boost::log::sources;
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namespace sinks = boost::log::sinks;
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namespace expr = boost::log::expressions;
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namespace keywords = boost::log::keywords;
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using boost::shared_ptr;
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enum
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{
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THREAD_COUNT = 5,
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LOG_RECORDS_TO_WRITE = 10
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};
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// Global logger declaration
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BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT(my_logger, src::logger_mt)
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// This function is executed in a separate thread
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void thread_foo()
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{
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BOOST_LOG_SCOPED_THREAD_TAG("ThreadID", boost::this_thread::get_id());
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for (unsigned int i = 0; i < LOG_RECORDS_TO_WRITE; ++i)
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{
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BOOST_LOG(my_logger::get()) << "Log record " << i;
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}
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}
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int main(int argc, char* argv[])
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{
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try
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{
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// Create a text file sink
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typedef sinks::synchronous_sink< sinks::text_multifile_backend > file_sink;
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shared_ptr< file_sink > sink(new file_sink);
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// Set up how the file names will be generated
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sink->locked_backend()->set_file_name_composer(sinks::file::as_file_name_composer(
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expr::stream << "logs/" << expr::attr< boost::thread::id >("ThreadID") << ".log"));
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// Set the log record formatter
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sink->set_formatter
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(
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expr::format("%1%: [%2%] - %3%")
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% expr::attr< unsigned int >("RecordID")
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% expr::attr< boost::posix_time::ptime >("TimeStamp")
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% expr::smessage
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);
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// Add it to the core
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logging::core::get()->add_sink(sink);
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// Add some attributes too
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logging::core::get()->add_global_attribute("TimeStamp", attrs::local_clock());
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logging::core::get()->add_global_attribute("RecordID", attrs::counter< unsigned int >());
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// Create threads and make some logs
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boost::thread_group threads;
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for (unsigned int i = 0; i < THREAD_COUNT; ++i)
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threads.create_thread(&thread_foo);
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threads.join_all();
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return 0;
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}
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catch (std::exception& e)
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{
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std::cout << "FAILURE: " << e.what() << std::endl;
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return 1;
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}
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}
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