ceph/src/boost/libs/log/example/doc/sinks_simple_event_log.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 <stdexcept>
   9 #include <string>
  10 #include <iostream>
  11 #include <boost/smart_ptr/shared_ptr.hpp>
  12 #include <boost/date_time/posix_time/posix_time.hpp>
  13
  14 #include <boost/log/common.hpp>
  15
  16 #if defined(BOOST_WINDOWS) && !defined(BOOST_LOG_WITHOUT_EVENT_LOG)
  17
  18 #include <boost/log/attributes.hpp>
  19 #include <boost/log/expressions.hpp>
  20 #include <boost/log/sinks/sync_frontend.hpp>
  21 #include <boost/log/sinks/event_log_backend.hpp>
  22
  23 namespace logging = boost::log;
  24 namespace attrs = boost::log::attributes;
  25 namespace src = boost::log::sources;
  26 namespace sinks = boost::log::sinks;
  27 namespace expr = boost::log::expressions;
  28 namespace keywords = boost::log::keywords;
  29
  30 //[ example_sinks_simple_event_log
  31 // Complete sink type
  32 typedef sinks::synchronous_sink< sinks::simple_event_log_backend > sink_t;
  33
  34 // Define application-specific severity levels
  35 enum severity_level
  36 {
  37     normal,
  38     warning,
  39     error
  40 };
  41
  42 void init_logging()
  43 {
  44     // Create an event log sink
  45     boost::shared_ptr< sink_t > sink(new sink_t());
  46
  47     sink->set_formatter
  48     (
  49         expr::format("%1%: [%2%] - %3%")
  50             % expr::attr< unsigned int >("LineID")
  51             % expr::attr< boost::posix_time::ptime >("TimeStamp")
  52             % expr::smessage
  53     );
  54
  55     // We'll have to map our custom levels to the event log event types
  56     sinks::event_log::custom_event_type_mapping< severity_level > mapping("Severity");
  57     mapping[normal] = sinks::event_log::info;
  58     mapping[warning] = sinks::event_log::warning;
  59     mapping[error] = sinks::event_log::error;
  60
  61     sink->locked_backend()->set_event_type_mapper(mapping);
  62
  63     // Add the sink to the core
  64     logging::core::get()->add_sink(sink);
  65 }
  66 //]
  67
  68 int main(int argc, char* argv[])
  69 {
  70     try
  71     {
  72         // Initialize logging library
  73         init_logging();
  74
  75         // Add some attributes too
  76         logging::core::get()->add_global_attribute("TimeStamp", attrs::local_clock());
  77         logging::core::get()->add_global_attribute("LineID", attrs::counter< unsigned int >());
  78
  79         // Do some logging
  80         src::severity_logger< severity_level > lg(keywords::severity = normal);
  81         BOOST_LOG_SEV(lg, normal) << "Some record for NT event log with normal level";
  82         BOOST_LOG_SEV(lg, warning) << "Some record for NT event log with warning level";
  83         BOOST_LOG_SEV(lg, error) << "Some record for NT event log with error level";
  84
  85         return 0;
  86     }
  87     catch (std::exception& e)
  88     {
  89         std::cout << "FAILURE: " << e.what() << std::endl;
  90         return 1;
  91     }
  92 }
  93
  94 #else
  95
  96 int main(int, char*[])
  97 {
  98     return 0;
  99 }
 100
 101 #endif