ceph/src/boost/libs/log/example/doc/sinks_file.cpp

   1 /*
   2  *          Copyright Andrey Semashev 2007 - 2015.
   3  * Distributed under the Boost Software License, Version 1.0.
   4  *    (See accompanying file LICENSE_1_0.txt or copy at
   5  *          http://www.boost.org/LICENSE_1_0.txt)
   6  */
   7
   8 #include <string>
   9 #include <fstream>
  10 #include <iostream>
  11 #include <boost/smart_ptr/shared_ptr.hpp>
  12 #include <boost/log/core.hpp>
  13 #include <boost/log/sinks/sync_frontend.hpp>
  14 #include <boost/log/sinks/text_file_backend.hpp>
  15 #include <boost/log/sources/severity_channel_logger.hpp>
  16 #include <boost/log/sources/record_ostream.hpp>
  17
  18 namespace logging = boost::log;
  19 namespace src = boost::log::sources;
  20 namespace sinks = boost::log::sinks;
  21 namespace keywords = boost::log::keywords;
  22
  23 //[ example_sinks_file
  24 void init_logging()
  25 {
  26     boost::shared_ptr< logging::core > core = logging::core::get();
  27
  28     boost::shared_ptr< sinks::text_file_backend > backend =
  29         boost::make_shared< sinks::text_file_backend >(
  30             keywords::file_name = "file_%5N.log",                                          /*< file name pattern >*/
  31             keywords::rotation_size = 5 * 1024 * 1024,                                     /*< rotate the file upon reaching 5 MiB size... >*/
  32             keywords::time_based_rotation = sinks::file::rotation_at_time_point(12, 0, 0)  /*< ...or every day, at noon, whichever comes first >*/
  33         );
  34
  35     // Wrap it into the frontend and register in the core.
  36     // The backend requires synchronization in the frontend.
  37     typedef sinks::synchronous_sink< sinks::text_file_backend > sink_t;
  38     boost::shared_ptr< sink_t > sink(new sink_t(backend));
  39
  40     core->add_sink(sink);
  41 }
  42 //]
  43
  44 int main(int, char*[])
  45 {
  46     init_logging();
  47
  48     src::severity_channel_logger< > lg(keywords::channel = "net");
  49     BOOST_LOG_SEV(lg, 3) << "Hello world!";
  50
  51     return 0;
  52 }