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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 <string>
- #include <iostream>
- #include <boost/smart_ptr/shared_ptr.hpp>
- #include <boost/thread/thread.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", boost::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< boost::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
- boost::thread_group threads;
- for (unsigned int i = 0; i < THREAD_COUNT; ++i)
- threads.create_thread(&thread_foo);
- threads.join_all();
- return 0;
- }
- catch (std::exception& e)
- {
- std::cout << "FAILURE: " << e.what() << std::endl;
- return 1;
- }
- }
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