Scheduler: Remove obsolete 'Scheduler' class

[senf.git] / Utils / Logger / Config.hh

diff --git a/Utils/Logger/Config.hh b/Utils/Logger/Config.hh
index 634d723..34566b1 100644 (file)
--- a/Utils/Logger/Config.hh
+++ b/Utils/Logger/Config.hh
@@ -1,8 +1,8 @@
 // $Id$
 //
-// Copyright (C) 2007 
-// Fraunhofer Institut fuer offene Kommunikationssysteme (FOKUS)
-// Kompetenzzentrum fuer Satelitenkommunikation (SatCom)
+// Copyright (C) 2007
+// Fraunhofer Institute for Open Communication Systems (FOKUS)
+// Competence Center NETwork research (NET), St. Augustin, GERMANY
 //     Stefan Bund <g0dil@berlios.de>
 //
 // This program is free software; you can redistribute it and/or modify
@@ -46,7 +46,7 @@
     <em>Runtime</em> configuration on the other hand deals with routing all those messages, which
     are enabled at compile time to the logging targets. If a message is not routed, it will be
     discarded. This allows to additionally disable messages at run-time. Message routing is managed
-    via the \ref Target interface.
+    via the ::Target interface.
 
     \section config_compile Compile time configuration
 
@@ -65,13 +65,25 @@
     \c foo::SomeClass area, where it is set to \c VERBOSE. Furthermore, the limit on the \c
     foo::Transactions stream is set to \c NOTICE.
 
+    There are two standard uses for this configuration: Either to disable most logging in final
+    builds by changing the compile time limit to something like senf::log::IMPORTANT or to enable
+    senf::log::VERBOSE messages for some area:
+    <pre>
+    # Disable debug logging below 'IMPORTANT' level
+    g++ ... -DSENF_LOG_CONF="(( (senf)(log)(Debug), (_), IMPORTANT ))"
+
+    # Or enable verbose messages for the 'some::Area' area
+    g++ ... -DSENF_LOG_CONF="(( (senf)(log)(Verbose), (some)(Area), VERBOSE ))"
+    </pre>
+
+
     \see \ref SENF_LOG_CONF
 
     \section config_runtime Runtime configuration
 
     The runtime configuration is performed by routing messages to one or more logging targets:
     \code
-    senf::log::ConsoleLog consoleLog;
+    senf::log::ConsoleLog & consoleLog (senf::log::ConsoleLog::instance());
     senf::log::FileLog fileLog ("my.log");
 
     consoleLog.route<senf::log::Debug>();
@@ -79,14 +91,28 @@
     consoleLog.route<foo::Transactions, senf::log::IMPORTANT>();
 
     fileLog.route<foo::Transactions>();
-    \endcode Here we see an already relatively complex setup: All debug messages (that is, those,
-    which are not disabled at compile time) are routed to the console. We also route important
-    transactions to the console \e except transactions from the \c foo::SomeClass area. The \c
-    fileLog simply receives all transaction log messages.
+    \endcode 
+    Here we see an already relatively complex setup: All debug messages (that is, those, which are
+    not disabled at compile time) are routed to the console. We also route important transactions to
+    the console \e except transactions from the \c foo::SomeClass area. The \c fileLog simply
+    receives all transaction log messages.
 
     The routing statements are processed by the targets in order, the first matching rule will
     decide a log messages fate for that target.
 
+    \section config_fallback Fallback routing
+    
+    There are two cases, where this setup may lead to inadvertently lost log messages:
+    \li When using a library which does internally use the Logger but not initializing the logger in
+        your application.
+    \li When log messages are created during initialization of static objects.
+    Since no route is set up in these cases, the messages will be dropped.
+    
+    To counter this problem, the logger is initially in <em>fallback routing</em> state. If any log
+    message arrives in this state, the message will be logged to the console if it is above the
+    default runtime limit of it's stream. The first routing statement on any target will take the
+    logger out of this state and normal routing will take place.
+
     \see \ref senf::log::Target
 
     \section config_timesource Log message timing
@@ -99,8 +125,8 @@
     By default, the logging library will call gettimeofday() for each log message. To change the
     time source, just pass the new class or instance to senf::log::timeSource:
     \code
-    // Use senf::Scheduler::instance().eventTime() to time log messages
-    senf::log::timeSource<senf::SchedulerLogTimeSource>();
+    // Use senf::scheduler::eventTime() to time log messages
+    senf::log::timeSource<senf::scheduler::LogTimeSource>();
     \endcode
  */
 
@@ -126,7 +152,7 @@ namespace log {
             <tr><td>stream</td>       <td>::= \e scope_seq \n</td></tr>
             <tr><td>optional_area</td><td>::= <tt>(_)</tt> | \e scope_seq \n</td></tr>
             <tr><td>level</td>        <td>::= \c VERBOSE | \c NOTICE | \c MESSAGE | \c IMPORTANT | \c CRITICAL | \c DISABLED \n</td></tr>
-            <tr><td>scope_seq</td>    <td>::= \e scope \e scope \e scope* \n</td></tr>
+            <tr><td>scope_seq</td>    <td>::= \e scope \e scope* \n</td></tr>
             <tr><td>scope</td>        <td>::= <tt>(</tt> \e name <tt>)</tt> \n</td></tr>
             <tr><td>name</td>         <td>::= arbitrary C++ identifier</td></tr>
             </table>