4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
6 // Stefan Bund <g0dil@berlios.de>
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 2 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the
20 // Free Software Foundation, Inc.,
21 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 \brief Target internal header */
26 #ifndef IH_SENF_Utils_Logger_Target_
27 #define IH_SENF_Utils_Logger_Target_ 1
31 #include <boost/type_traits/is_same.hpp>
32 #include <boost/static_assert.hpp>
33 #include "../Console/LazyDirectory.hh"
34 #include "../Console/Parse.hh"
36 ///////////////////////////////ih.p////////////////////////////////////////
42 struct LogParameters {
43 StreamBase const * stream;
44 AreaBase const * area;
48 static LogParameters defaultParameters();
51 std::ostream & operator<<(std::ostream & os, LogParameters const & pm);
53 void senf_console_parse_argument(console::ParseCommandInfo::TokensRange const & tokens,
56 /** \brief Internal: Target registry */
58 : public senf::singleton<TargetRegistry>
62 VERBOSE = senf::log::VERBOSE::value,
63 NOTICE = senf::log::NOTICE::value,
64 MESSAGE = senf::log::MESSAGE::value,
65 IMPORTANT = senf::log::IMPORTANT::value,
66 CRITICAL = senf::log::CRITICAL::value,
67 FATAL = senf::log::FATAL::value
70 using senf::singleton<TargetRegistry>::instance;
72 void write(StreamBase const & stream, AreaBase const & area, unsigned level,
73 std::string const & msg);
76 bool fallbackRouting();
78 senf::console::ScopedDirectory<> & consoleDir();
80 void dynamicTarget(std::auto_ptr<Target> target);
86 void registerTarget(Target * target, std::string const & name);
87 void unregisterTarget(Target * target);
89 void consoleAreas(std::ostream & os);
90 void consoleStreams(std::ostream & os);
91 void consoleWrite(LogParameters parameters, std::string const & msg);
92 void consoleRemoveTarget(Target * target);
94 typedef std::set<Target *> Targets;
97 bool fallbackRouting_;
99 console::LazyDirectory consoleDir_;
101 Targets dynamicTargets_;
103 friend class senf::log::Target;
104 friend class senf::singleton<TargetRegistry>;
107 /** \brief Internal: Write log message */
108 template <class Stream, class Area, class Level>
109 void write(std::string const & msg);
113 // This code takes the routing target template arguments in any order and sorts them
114 // by type (Stream, Area and Level).
116 senf::mpl::rv<0u> RouteParameterCheck_(...);
117 senf::mpl::rv<1u> RouteParameterCheck_(StreamBase *);
118 senf::mpl::rv<2u> RouteParameterCheck_(AreaBase *);
119 template <class T> senf::mpl::rv<3u> RouteParameterCheck_(T*, typename T::SENFLogArea * = 0);
120 senf::mpl::rv<4u> RouteParameterCheck_(LevelBase *);
122 // For g++ 4.0 (at least) we need to provide the fully scoped name for this default value.
123 // no idea why. It works without the scope in 4.1
124 template < class T, class A2, class A1,
125 unsigned type = SENF_MPL_RV( senf::log::detail::RouteParameterCheck_(static_cast<T*>(0)) ) >
126 struct RouteParameters
129 template <class A2, class A1>
130 struct RouteParameters<mpl::nil,A2,A1,0u>
131 : public RouteParameters<A2,A1,mpl::nil>
135 static unsigned const value = NONE::value;
139 struct RouteParameters<mpl::nil,mpl::nil,mpl::nil,0u>
141 typedef mpl::nil Stream;
142 typedef mpl::nil Area;
143 typedef NilLevel Level;
146 template <class T, class A2, class A1>
147 struct RouteParameters<T,A2,A1,1u>
148 : public RouteParameters<A2,A1,mpl::nil>
150 typedef RouteParameters<A2,A1,mpl::nil> base;
151 BOOST_STATIC_ASSERT(( boost::is_same<typename base::Stream, mpl::nil>::value ));
155 template <class T, class A2, class A1>
156 struct RouteParameters<T,A2,A1,2u>
157 : public RouteParameters<A2,A1,mpl::nil>
159 typedef RouteParameters<A2,A1,mpl::nil> base;
160 BOOST_STATIC_ASSERT(( boost::is_same<typename base::Area, mpl::nil>::value ));
164 template <class T, class A2, class A1>
165 struct RouteParameters<T,A2,A1,3u>
166 : public RouteParameters<A2,A1,mpl::nil>
168 typedef RouteParameters<A2,A1,mpl::nil> base;
169 BOOST_STATIC_ASSERT(( boost::is_same<typename base::Area, mpl::nil>::value ));
170 typedef typename T::SENFLogArea Area;
173 template <class T, class A2, class A1>
174 struct RouteParameters<T,A2,A1,4u>
175 : public RouteParameters<A2,A1,mpl::nil>
177 typedef RouteParameters<A2,A1,mpl::nil> base;
178 BOOST_STATIC_ASSERT(( boost::is_same<typename base::Level, NilLevel>::value ));
182 template <class T, class RV>
185 static RV * value() { return & T::instance(); }
189 struct InstanceP<mpl::nil, RV>
191 static RV * value() { return 0; }
198 ///////////////////////////////ih.e////////////////////////////////////////
205 // comment-column: 40
206 // c-file-style: "senf"
207 // indent-tabs-mode: nil
208 // ispell-local-dictionary: "american"
209 // compile-command: "scons -u test"