ceph/src/boost/libs/log/include/boost/log/utility/setup/from_settings.hpp

   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  * \file   from_settings.hpp
   9  * \author Andrey Semashev
  10  * \date   11.10.2009
  11  *
  12  * The header contains definition of facilities that allows to initialize the library from
  13  * settings.
  14  */
  15
  16 #ifndef BOOST_LOG_UTILITY_SETUP_FROM_SETTINGS_HPP_INCLUDED_
  17 #define BOOST_LOG_UTILITY_SETUP_FROM_SETTINGS_HPP_INCLUDED_
  18
  19 #include <string>
  20 #include <boost/smart_ptr/shared_ptr.hpp>
  21 #include <boost/core/enable_if.hpp>
  22 #include <boost/type_traits/is_base_and_derived.hpp>
  23 #include <boost/log/detail/setup_config.hpp>
  24 #include <boost/log/sinks/sink.hpp>
  25 #include <boost/log/utility/setup/settings.hpp>
  26 #include <boost/log/detail/header.hpp>
  27
  28 #ifdef BOOST_HAS_PRAGMA_ONCE
  29 #pragma once
  30 #endif
  31
  32 namespace boost {
  33
  34 BOOST_LOG_OPEN_NAMESPACE
  35
  36 /*!
  37  * The function initializes the logging library from a settings container
  38  *
  39  * \param setts Library settings container
  40  *
  41  * \b Throws: An <tt>std::exception</tt>-based exception if the provided settings are not valid.
  42  */
  43 template< typename CharT >
  44 BOOST_LOG_SETUP_API void init_from_settings(basic_settings_section< CharT > const& setts);
  45
  46
  47 /*!
  48  * Sink factory base interface
  49  */
  50 template< typename CharT >
  51 struct sink_factory
  52 {
  53     //! Character type
  54     typedef CharT char_type;
  55     //! String type
  56     typedef std::basic_string< char_type > string_type;
  57     //! Settings section type
  58     typedef basic_settings_section< char_type > settings_section;
  59
  60     /*!
  61      * Default constructor
  62      */
  63     BOOST_DEFAULTED_FUNCTION(sink_factory(), {})
  64
  65     /*!
  66      * Virtual destructor
  67      */
  68     virtual ~sink_factory() {}
  69
  70     /*!
  71      * The function creates a formatter for the specified attribute.
  72      *
  73      * \param settings Sink parameters
  74      */
  75     virtual shared_ptr< sinks::sink > create_sink(settings_section const& settings) = 0;
  76
  77     BOOST_DELETED_FUNCTION(sink_factory(sink_factory const&))
  78     BOOST_DELETED_FUNCTION(sink_factory& operator= (sink_factory const&))
  79 };
  80
  81 /*!
  82  * \brief The function registers a factory for a custom sink
  83  *
  84  * The function registers a factory for a sink. The factory will be called to create sink
  85  * instance when the parser discovers the specified sink type in the settings file. The
  86  * factory must accept a map of parameters [parameter name -> parameter value] that it
  87  * may use to initialize the sink. The factory must return a non-NULL pointer to the
  88  * constructed sink instance.
  89  *
  90  * \param sink_name The custom sink name. Must point to a zero-terminated sequence of characters,
  91  *                  must not be NULL.
  92  * \param factory Pointer to the custom sink factory. Must not be NULL.
  93  */
  94 template< typename CharT >
  95 BOOST_LOG_SETUP_API void register_sink_factory(const char* sink_name, shared_ptr< sink_factory< CharT > > const& factory);
  96
  97 /*!
  98  * \brief The function registers a factory for a custom sink
  99  *
 100  * The function registers a factory for a sink. The factory will be called to create sink
 101  * instance when the parser discovers the specified sink type in the settings file. The
 102  * factory must accept a map of parameters [parameter name -> parameter value] that it
 103  * may use to initialize the sink. The factory must return a non-NULL pointer to the
 104  * constructed sink instance.
 105  *
 106  * \param sink_name The custom sink name
 107  * \param factory Pointer to the custom sink factory. Must not be NULL.
 108  */
 109 template< typename CharT >
 110 inline void register_sink_factory(std::string const& sink_name, shared_ptr< sink_factory< CharT > > const& factory)
 111 {
 112     register_sink_factory(sink_name.c_str(), factory);
 113 }
 114
 115 /*!
 116  * \brief The function registers a factory for a custom sink
 117  *
 118  * The function registers a factory for a sink. The factory will be called to create sink
 119  * instance when the parser discovers the specified sink type in the settings file. The
 120  * factory must accept a map of parameters [parameter name -> parameter value] that it
 121  * may use to initialize the sink. The factory must return a non-NULL pointer to the
 122  * constructed sink instance.
 123  *
 124  * \param sink_name The custom sink name. Must point to a zero-terminated sequence of characters,
 125  *                  must not be NULL.
 126  * \param factory Pointer to the custom sink factory. Must not be NULL.
 127  */
 128 template< typename FactoryT >
 129 inline typename boost::enable_if_c<
 130     is_base_and_derived< sink_factory< typename FactoryT::char_type >, FactoryT >::value
 131 >::type register_sink_factory(const char* sink_name, shared_ptr< FactoryT > const& factory)
 132 {
 133     typedef sink_factory< typename FactoryT::char_type > factory_base;
 134     register_sink_factory(sink_name, boost::static_pointer_cast< factory_base >(factory));
 135 }
 136
 137 /*!
 138  * \brief The function registers a factory for a custom sink
 139  *
 140  * The function registers a factory for a sink. The factory will be called to create sink
 141  * instance when the parser discovers the specified sink type in the settings file. The
 142  * factory must accept a map of parameters [parameter name -> parameter value] that it
 143  * may use to initialize the sink. The factory must return a non-NULL pointer to the
 144  * constructed sink instance.
 145  *
 146  * \param sink_name The custom sink name
 147  * \param factory Pointer to the custom sink factory. Must not be NULL.
 148  */
 149 template< typename FactoryT >
 150 inline typename boost::enable_if_c<
 151     is_base_and_derived< sink_factory< typename FactoryT::char_type >, FactoryT >::value
 152 >::type register_sink_factory(std::string const& sink_name, shared_ptr< FactoryT > const& factory)
 153 {
 154     typedef sink_factory< typename FactoryT::char_type > factory_base;
 155     register_sink_factory(sink_name.c_str(), boost::static_pointer_cast< factory_base >(factory));
 156 }
 157
 158 BOOST_LOG_CLOSE_NAMESPACE // namespace log
 159
 160 } // namespace boost
 161
 162 #include <boost/log/detail/footer.hpp>
 163
 164 #endif // BOOST_LOG_UTILITY_SETUP_FROM_SETTINGS_HPP_INCLUDED_