update example

Author: sy-c

example/CMakeLists.txt

@@ -2,6 +2,9 @@
 # typical command:
 # cmake -DInfoLogger_DIR=path/to/infologger/lib/cmake/InfoLogger  .. 
 
+project (InfoLoggerExample)
+cmake_minimum_required(VERSION 3.17)
+
 find_package(InfoLogger REQUIRED)
 set(CMAKE_CXX_STANDARD 14)
 add_executable(exampleLog exampleLog.cxx)

example/exampleLog.cxx

@@ -9,11 +9,32 @@
 // or submit itself to any jurisdiction.
 
 #include <InfoLogger/InfoLogger.hxx>
+
+// optionnaly, use the helper macros
+#include <InfoLogger/InfoLoggerMacros.hxx>
+      
 using namespace AliceO2::InfoLogger;
 int main()
 {
+  // create handle to infologger system
   InfoLogger theLog;
 
+  // or, alternatively, to start infologger library in debug mode on stdout
+  // (can also be done at runtime by setting environment O2_INFOLOGGER_MODE)
+  // outputMode can be one of stdout, debug, infoLoggerD, ...
+  // InfoLogger theLog("outputMode=debug");
+
+  // optionnaly, customize some of the "static" fields
+  // to be applied to all messages
+  InfoLoggerContext theLogContext;
+  theLogContext.setField(InfoLoggerContext::FieldName::Facility, "myTestFacility");
+  theLog.setContext(theLogContext);
+
+  // log a message
   theLog.log("infoLogger message test");
+    
+  // log a warning with code 1234 for developers
+  theLog.log(LogWarningDevel_(1234), "this is a test warning message");
+  
   return 0;
 }