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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 <cstdlib> | |
9 | #include <string> | |
10 | #include <utility> | |
11 | #include <stdexcept> | |
12 | #include <boost/smart_ptr/shared_ptr.hpp> | |
13 | #include <boost/phoenix.hpp> | |
14 | #include <boost/log/trivial.hpp> | |
15 | #include <boost/log/core.hpp> | |
16 | #include <boost/log/expressions.hpp> | |
17 | #include <boost/log/attributes/current_process_name.hpp> | |
18 | #include <boost/log/sinks/sync_frontend.hpp> | |
19 | #include <boost/log/sinks/basic_sink_backend.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 | ||
25 | namespace logging = boost::log; | |
26 | namespace attrs = boost::log::attributes; | |
27 | namespace src = boost::log::sources; | |
28 | namespace expr = boost::log::expressions; | |
29 | namespace sinks = boost::log::sinks; | |
30 | namespace keywords = boost::log::keywords; | |
31 | ||
32 | //[ example_extension_app_launcher_definition | |
33 | // The backend starts an external application to display notifications | |
34 | class app_launcher : | |
35 | public sinks::basic_formatted_sink_backend< | |
36 | char, /*< target character type >*/ | |
37 | sinks::synchronized_feeding /*< in order not to spawn too many application instances we require records to be processed serial >*/ | |
38 | > | |
39 | { | |
40 | public: | |
41 | // The function consumes the log records that come from the frontend | |
42 | void consume(logging::record_view const& rec, string_type const& command_line); | |
43 | }; | |
44 | //] | |
45 | ||
46 | //[ example_extension_app_launcher_consume | |
47 | // The function consumes the log records that come from the frontend | |
48 | void app_launcher::consume(logging::record_view const& rec, string_type const& command_line) | |
49 | { | |
50 | std::system(command_line.c_str()); | |
51 | } | |
52 | //] | |
53 | ||
54 | //[ example_extension_app_launcher_formatting | |
55 | BOOST_LOG_ATTRIBUTE_KEYWORD(process_name, "ProcessName", std::string) | |
56 | BOOST_LOG_ATTRIBUTE_KEYWORD(caption, "Caption", std::string) | |
57 | ||
58 | // Custom severity level formatting function | |
59 | std::string severity_level_as_urgency( | |
60 | logging::value_ref< logging::trivial::severity_level, logging::trivial::tag::severity > const& level) | |
61 | { | |
62 | if (!level || level.get() == logging::trivial::info) | |
63 | return "normal"; | |
64 | logging::trivial::severity_level lvl = level.get(); | |
65 | if (lvl < logging::trivial::info) | |
66 | return "low"; | |
67 | else | |
68 | return "critical"; | |
69 | } | |
70 | ||
71 | // The function initializes the logging library | |
72 | void init_logging() | |
73 | { | |
74 | boost::shared_ptr< logging::core > core = logging::core::get(); | |
75 | ||
76 | typedef sinks::synchronous_sink< app_launcher > sink_t; | |
77 | boost::shared_ptr< sink_t > sink(new sink_t()); | |
78 | ||
79 | const std::pair< const char*, const char* > shell_decorations[] = | |
80 | { | |
81 | std::pair< const char*, const char* >("\"", "\\\""), | |
82 | std::pair< const char*, const char* >("$", "\\$"), | |
83 | std::pair< const char*, const char* >("!", "\\!") | |
84 | }; | |
85 | ||
86 | // Make the formatter generate the command line for notify-send | |
87 | sink->set_formatter | |
88 | ( | |
89 | expr::stream << "notify-send -t 2000 -u " | |
90 | << boost::phoenix::bind(&severity_level_as_urgency, logging::trivial::severity.or_none()) | |
91 | << expr::if_(expr::has_attr(process_name)) | |
92 | [ | |
93 | expr::stream << " -a '" << process_name << "'" | |
94 | ] | |
95 | << expr::if_(expr::has_attr(caption)) | |
96 | [ | |
97 | expr::stream << " \"" << expr::char_decor(shell_decorations)[ expr::stream << caption ] << "\"" | |
98 | ] | |
99 | << " \"" << expr::char_decor(shell_decorations)[ expr::stream << expr::message ] << "\"" | |
100 | ); | |
101 | ||
102 | core->add_sink(sink); | |
103 | ||
104 | // Add attributes that we will use | |
105 | core->add_global_attribute("ProcessName", attrs::current_process_name()); | |
106 | } | |
107 | //] | |
108 | ||
109 | //[ example_extension_app_launcher_logging | |
110 | void test_notifications() | |
111 | { | |
112 | BOOST_LOG_TRIVIAL(debug) << "Hello, it's a simple notification"; | |
113 | BOOST_LOG_TRIVIAL(info) << logging::add_value(caption, "Caption text") << "And this notification has caption as well"; | |
114 | } | |
115 | //] | |
116 | ||
117 | int main(int, char*[]) | |
118 | { | |
119 | init_logging(); | |
120 | test_notifications(); | |
121 | ||
122 | return 0; | |
123 | } |