ENH: Report useful info at logger startup

Modules/Core/Common/include/otbLogger.h

@@ -50,6 +50,8 @@ public:
   // Overwrite this to provide custom formatting of log entries
   virtual std::string BuildFormattedEntry(itk::Logger::PriorityLevelType, std::string const&) ITK_OVERRIDE;
 
+  void LogSetupInformation();
+  
 protected:
   itkNewMacro(Self);
   Logger();

Modules/Core/Common/src/CMakeLists.txt

@@ -34,8 +34,7 @@ set(OTBCommon_SRC
 
 add_library(OTBCommon ${OTBCommon_SRC})
 target_link_libraries(OTBCommon
-  ${OTBITK_LIBRARIES}
-
+  ${OTBITK_LIBRARIES} ${OTBGDAL_LIBRARIES}
   )
 
 otb_module_target(OTBCommon)

Modules/Core/Common/src/otbLogger.cxx

@@ -23,6 +23,8 @@
 #include "otbConfigurationManager.h"
 #include "itkStdStreamLogOutput.h"
 #include <iostream>
+#include "gdal.h"
+#include "itkMultiThreader.h"
 
 namespace otb
 {
@@ -40,12 +42,14 @@ Logger::Pointer Logger::Instance()
     defaultOutput->SetStream(std::cout);
 
     Logger::Singleton->AddLogOutput(defaultOutput);
+
+    // Log setup information
+    Logger::Singleton->LogSetupInformation();
     }
   
   return Logger::Singleton;
 }
 
-
 Logger::Logger()
 {
   this->SetPriorityLevel(otb::ConfigurationManager::GetLoggerLevel());
@@ -60,6 +64,23 @@ Logger::~Logger()
 {
 }
 
+void Logger::LogSetupInformation()
+{
+  std::ostringstream oss;
+  
+  oss<<"Default RAM limit for OTB is "<<otb::ConfigurationManager::GetMaxRAMHint()<<" Mb"<<std::endl;
+  this->Info(oss.str());
+  oss.str("");
+
+  oss<<"Gdal maximum cache size is "<<GDALGetCacheMax64()/(1024*1024)<<" Mb"<<std::endl;
+  this->Info(oss.str());
+  oss.str("");
+
+  oss<<"OTB will use at most "<<itk::MultiThreader::GetGlobalDefaultNumberOfThreads()<<" threads"<<std::endl;
+  this->Info(oss.str());
+  oss.str("");
+}
+
 std::string Logger::BuildFormattedEntry(itk::Logger::PriorityLevelType level, std::string const & content)
 {
  static const std::string levelString[] = { "(MUSTFLUSH)", "(FATAL)", "(CRITICAL)",