ceph/src/boost/libs/log/example/doc/tutorial_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 <boost/log/core.hpp>
   9 #include <boost/log/trivial.hpp>
  10 #include <boost/log/expressions.hpp>
  11 #include <boost/log/sinks/text_file_backend.hpp>
  12 #include <boost/log/utility/setup/file.hpp>
  13 #include <boost/log/utility/setup/common_attributes.hpp>
  14 #include <boost/log/sources/severity_logger.hpp>
  15 #include <boost/log/sources/record_ostream.hpp>
  16
  17 namespace logging = boost::log;
  18 namespace src = boost::log::sources;
  19 namespace sinks = boost::log::sinks;
  20 namespace keywords = boost::log::keywords;
  21
  22 #if 0
  23
  24 //[ example_tutorial_file_simple
  25 void init()
  26 {
  27     logging::add_file_log("sample.log");
  28
  29     logging::core::get()->set_filter
  30     (
  31         logging::trivial::severity >= logging::trivial::info
  32     );
  33 }
  34 //]
  35
  36 // We need this due to this bug: https://svn.boost.org/trac/boost/ticket/4416
  37 //[ example_tutorial_file_advanced_no_callouts
  38 void init()
  39 {
  40     logging::add_file_log
  41     (
  42         keywords::file_name = "sample_%N.log",
  43         keywords::rotation_size = 10 * 1024 * 1024,
  44         keywords::time_based_rotation = sinks::file::rotation_at_time_point(0, 0, 0),
  45         keywords::format = "[%TimeStamp%]: %Message%"
  46     );
  47
  48     logging::core::get()->set_filter
  49     (
  50         logging::trivial::severity >= logging::trivial::info
  51     );
  52 }
  53 //]
  54
  55 #else
  56
  57 //[ example_tutorial_file_advanced
  58 void init()
  59 {
  60     logging::add_file_log
  61     (
  62         keywords::file_name = "sample_%N.log",                                        /*< file name pattern >*/
  63         keywords::rotation_size = 10 * 1024 * 1024,                                   /*< rotate files every 10 MiB... >*/
  64         keywords::time_based_rotation = sinks::file::rotation_at_time_point(0, 0, 0), /*< ...or at midnight >*/
  65         keywords::format = "[%TimeStamp%]: %Message%"                                 /*< log record format >*/
  66     );
  67
  68     logging::core::get()->set_filter
  69     (
  70         logging::trivial::severity >= logging::trivial::info
  71     );
  72 }
  73 //]
  74
  75 #endif
  76
  77 int main(int, char*[])
  78 {
  79     init();
  80     logging::add_common_attributes();
  81
  82     using namespace logging::trivial;
  83     src::severity_logger< severity_level > lg;
  84
  85     BOOST_LOG_SEV(lg, trace) << "A trace severity message";
  86     BOOST_LOG_SEV(lg, debug) << "A debug severity message";
  87     BOOST_LOG_SEV(lg, info) << "An informational severity message";
  88     BOOST_LOG_SEV(lg, warning) << "A warning severity message";
  89     BOOST_LOG_SEV(lg, error) << "An error severity message";
  90     BOOST_LOG_SEV(lg, fatal) << "A fatal severity message";
  91
  92     return 0;
  93 }