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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 <string> | |
9 | #include <fstream> | |
10 | #include <iostream> | |
11 | #include <boost/smart_ptr/shared_ptr.hpp> | |
12 | #include <boost/core/null_deleter.hpp> | |
13 | #include <boost/log/core.hpp> | |
14 | #include <boost/log/expressions.hpp> | |
15 | #include <boost/log/sinks/sync_frontend.hpp> | |
16 | #include <boost/log/sinks/text_ostream_backend.hpp> | |
17 | #include <boost/log/sources/severity_channel_logger.hpp> | |
18 | #include <boost/log/sources/record_ostream.hpp> | |
19 | ||
20 | namespace logging = boost::log; | |
21 | namespace src = boost::log::sources; | |
22 | namespace expr = boost::log::expressions; | |
23 | namespace sinks = boost::log::sinks; | |
24 | namespace keywords = boost::log::keywords; | |
25 | ||
26 | //[ example_sinks_sync | |
27 | enum severity_level | |
28 | { | |
29 | normal, | |
30 | warning, | |
31 | error | |
32 | }; | |
33 | ||
34 | // Complete sink type | |
35 | typedef sinks::synchronous_sink< sinks::text_ostream_backend > sink_t; | |
36 | ||
37 | void init_logging() | |
38 | { | |
39 | boost::shared_ptr< logging::core > core = logging::core::get(); | |
40 | ||
41 | // Create a backend and initialize it with a stream | |
42 | boost::shared_ptr< sinks::text_ostream_backend > backend = | |
43 | boost::make_shared< sinks::text_ostream_backend >(); | |
44 | backend->add_stream( | |
45 | boost::shared_ptr< std::ostream >(&std::clog, boost::null_deleter())); | |
46 | ||
47 | // Wrap it into the frontend and register in the core | |
48 | boost::shared_ptr< sink_t > sink(new sink_t(backend)); | |
49 | core->add_sink(sink); | |
50 | ||
51 | // You can manage filtering and formatting through the sink interface | |
52 | sink->set_filter(expr::attr< severity_level >("Severity") >= warning); | |
53 | sink->set_formatter | |
54 | ( | |
55 | expr::stream | |
56 | << "Level: " << expr::attr< severity_level >("Severity") | |
57 | << " Message: " << expr::smessage | |
58 | ); | |
59 | ||
60 | // You can also manage backend in a thread-safe manner | |
61 | { | |
62 | sink_t::locked_backend_ptr p = sink->locked_backend(); | |
63 | p->add_stream(boost::make_shared< std::ofstream >("sample.log")); | |
64 | } // the backend gets released here | |
65 | } | |
66 | //] | |
67 | ||
68 | int main(int, char*[]) | |
69 | { | |
70 | init_logging(); | |
71 | ||
72 | src::severity_channel_logger< severity_level > lg(keywords::channel = "net"); | |
73 | BOOST_LOG_SEV(lg, warning) << "Hello world!"; | |
74 | ||
75 | return 0; | |
76 | } |