]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
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 <iostream> | |
10 | #include <stdexcept> | |
11 | #include <boost/smart_ptr/shared_ptr.hpp> | |
12 | #include <boost/smart_ptr/make_shared_object.hpp> | |
13 | #include <boost/lexical_cast.hpp> | |
14 | #include <boost/phoenix.hpp> | |
15 | #include <boost/log/core.hpp> | |
16 | #include <boost/log/expressions.hpp> | |
17 | #include <boost/log/attributes/attribute_name.hpp> | |
18 | #include <boost/log/attributes/scoped_attribute.hpp> | |
19 | #include <boost/log/sources/logger.hpp> | |
20 | #include <boost/log/sources/record_ostream.hpp> | |
21 | #include <boost/log/utility/value_ref.hpp> | |
22 | #include <boost/log/utility/formatting_ostream.hpp> | |
23 | #include <boost/log/utility/manipulators/add_value.hpp> | |
24 | #include <boost/log/utility/setup/filter_parser.hpp> | |
25 | #include <boost/log/utility/setup/common_attributes.hpp> | |
26 | #include <boost/log/utility/setup/console.hpp> | |
27 | ||
28 | namespace logging = boost::log; | |
29 | namespace attrs = boost::log::attributes; | |
30 | namespace src = boost::log::sources; | |
31 | namespace expr = boost::log::expressions; | |
32 | namespace sinks = boost::log::sinks; | |
33 | namespace keywords = boost::log::keywords; | |
34 | ||
35 | //[ example_extension_filter_parser_point_definition | |
36 | struct point | |
37 | { | |
38 | float m_x, m_y; | |
39 | ||
40 | point() : m_x(0.0f), m_y(0.0f) {} | |
41 | point(float x, float y) : m_x(x), m_y(y) {} | |
42 | }; | |
43 | ||
44 | bool operator== (point const& left, point const& right); | |
45 | bool operator!= (point const& left, point const& right); | |
46 | ||
47 | template< typename CharT, typename TraitsT > | |
48 | std::basic_ostream< CharT, TraitsT >& operator<< (std::basic_ostream< CharT, TraitsT >& strm, point const& p); | |
49 | template< typename CharT, typename TraitsT > | |
50 | std::basic_istream< CharT, TraitsT >& operator>> (std::basic_istream< CharT, TraitsT >& strm, point& p); | |
51 | //] | |
52 | ||
53 | const float epsilon = 0.0001f; | |
54 | ||
55 | bool operator== (point const& left, point const& right) | |
56 | { | |
57 | return (left.m_x - epsilon <= right.m_x && left.m_x + epsilon >= right.m_x) && | |
58 | (left.m_y - epsilon <= right.m_y && left.m_y + epsilon >= right.m_y); | |
59 | } | |
60 | ||
61 | bool operator!= (point const& left, point const& right) | |
62 | { | |
63 | return !(left == right); | |
64 | } | |
65 | ||
66 | template< typename CharT, typename TraitsT > | |
67 | std::basic_ostream< CharT, TraitsT >& operator<< (std::basic_ostream< CharT, TraitsT >& strm, point const& p) | |
68 | { | |
69 | if (strm.good()) | |
70 | strm << "(" << p.m_x << ", " << p.m_y << ")"; | |
71 | return strm; | |
72 | } | |
73 | ||
74 | template< typename CharT, typename TraitsT > | |
75 | std::basic_istream< CharT, TraitsT >& operator>> (std::basic_istream< CharT, TraitsT >& strm, point& p) | |
76 | { | |
77 | if (strm.good()) | |
78 | { | |
79 | CharT left_brace = static_cast< CharT >(0), comma = static_cast< CharT >(0), right_brace = static_cast< CharT >(0); | |
80 | strm.setf(std::ios_base::skipws); | |
81 | strm >> left_brace >> p.m_x >> comma >> p.m_y >> right_brace; | |
82 | if (left_brace != '(' || comma != ',' || right_brace != ')') | |
83 | strm.setstate(std::ios_base::failbit); | |
84 | } | |
85 | return strm; | |
86 | } | |
87 | ||
88 | #if 0 | |
89 | //[ example_extension_simple_filter_factory | |
90 | void init_factories() | |
91 | { | |
92 | //<- | |
93 | logging::register_simple_formatter_factory< point, char >("Coordinates"); | |
94 | //-> | |
95 | logging::register_simple_filter_factory< point, char >("Coordinates"); | |
96 | } | |
97 | //] | |
98 | #endif | |
99 | ||
100 | //[ example_extension_custom_filter_factory | |
101 | // Custom point filter factory | |
102 | class point_filter_factory : | |
103 | public logging::filter_factory< char > | |
104 | { | |
105 | public: | |
106 | logging::filter on_exists_test(logging::attribute_name const& name) | |
107 | { | |
108 | return expr::has_attr< point >(name); | |
109 | } | |
110 | ||
111 | logging::filter on_equality_relation(logging::attribute_name const& name, string_type const& arg) | |
112 | { | |
113 | return expr::attr< point >(name) == boost::lexical_cast< point >(arg); | |
114 | } | |
115 | ||
116 | logging::filter on_inequality_relation(logging::attribute_name const& name, string_type const& arg) | |
117 | { | |
118 | return expr::attr< point >(name) != boost::lexical_cast< point >(arg); | |
119 | } | |
120 | }; | |
121 | ||
122 | void init_factories() | |
123 | { | |
124 | //<- | |
125 | logging::register_simple_formatter_factory< point, char >("Coordinates"); | |
126 | //-> | |
127 | logging::register_filter_factory("Coordinates", boost::make_shared< point_filter_factory >()); | |
128 | } | |
129 | //] | |
130 | ||
131 | void init_logging() | |
132 | { | |
133 | init_factories(); | |
134 | ||
135 | logging::add_console_log | |
136 | ( | |
137 | std::clog, | |
138 | keywords::filter = "%Coordinates% = \"(10, 10)\"", | |
139 | keywords::format = "%TimeStamp% %Coordinates% %Message%" | |
140 | ); | |
141 | ||
142 | logging::add_common_attributes(); | |
143 | } | |
144 | ||
145 | int main(int, char*[]) | |
146 | { | |
147 | init_logging(); | |
148 | ||
149 | src::logger lg; | |
150 | ||
151 | // We have to use scoped attributes in order coordinates to be passed to filters | |
152 | { | |
153 | BOOST_LOG_SCOPED_LOGGER_TAG(lg, "Coordinates", point(10, 10)); | |
154 | BOOST_LOG(lg) << "Hello, world with coordinates (10, 10)!"; | |
155 | } | |
156 | { | |
157 | BOOST_LOG_SCOPED_LOGGER_TAG(lg, "Coordinates", point(20, 20)); | |
158 | BOOST_LOG(lg) << "Hello, world with coordinates (20, 20)!"; // this message will be suppressed by filter | |
159 | } | |
160 | ||
161 | return 0; | |
162 | } |