Index: sources/storage/logger.h
===================================================================
diff -u -rc6a09899d2e46dc0bda5a6b994aa257953626f97 -r7d23aecac8db9b7495e7d505f55bba5a0d510360
--- sources/storage/logger.h	(.../logger.h)	(revision c6a09899d2e46dc0bda5a6b994aa257953626f97)
+++ sources/storage/logger.h	(.../logger.h)	(revision 7d23aecac8db9b7495e7d505f55bba5a0d510360)
@@ -25,11 +25,40 @@
 
 // Define
 #define _Logger             Storage::Logger::I()
-#define LOG_EVENT(vCONTENT) emit Storage::Logger::I().didLog(vCONTENT, Storage::Logger::LogType::eLogEvent)
-#define LOG_ERROR(vCONTENT) emit Storage::Logger::I().didLog(vCONTENT, Storage::Logger::LogType::eLogError)
-#define LOG_DATUM(vCONTENT) emit Storage::Logger::I().didLog(vCONTENT, Storage::Logger::LogType::eLogDatum)
+
 #define LOG_EXPORT          _Logger.concurrentExport()
 
+#define         LOG_EVENT(vCONTENT) emit Storage::Logger::I().didLog(vCONTENT, Storage::Logger::LogType::eLogEvent)
+#define         LOG_EVENT_ONCE_LOGGED           \
+               bLOG_EVENT_ONCE_LOGGED
+#define         LOG_EVENT_ONCE(vCONTENT)        \
+    static bool LOG_EVENT_ONCE_LOGGED = false;  \
+    if (   !    LOG_EVENT_ONCE_LOGGED ) {       \
+                LOG_EVENT_ONCE_LOGGED = true;   \
+                LOG_EVENT(vCONTENT);            \
+    }
+
+#define         LOG_ERROR(vCONTENT) emit Storage::Logger::I().didLog(vCONTENT, Storage::Logger::LogType::eLogError)
+#define         LOG_ERROR_ONCE_LOGGED           \
+               bLOG_ERROR_ONCE_LOGGED
+#define         LOG_ERROR_ONCE(vCONTENT)        \
+    static bool LOG_ERROR_ONCE_LOGGED = false;  \
+    if (   !    LOG_ERROR_ONCE_LOGGED ) {       \
+                LOG_ERROR_ONCE_LOGGED = true;   \
+                LOG_ERROR(vCONTENT);            \
+    }
+
+#define         LOG_DATUM(vCONTENT) emit Storage::Logger::I().didLog(vCONTENT, Storage::Logger::LogType::eLogDatum)
+#define         LOG_DATUM_ONCE_LOGGED           \
+               bLOG_DATUM_ONCE_LOGGED
+#define         LOG_DATUM_ONCE(vCONTENT)        \
+    static bool LOG_DATUM_ONCE_LOGGED = false;  \
+    if (   !    LOG_DATUM_ONCE_LOGGED ) {       \
+                LOG_DATUM_ONCE_LOGGED = true;   \
+                LOG_DATUM(vCONTENT);            \
+    }
+
+
 // forward declarations
 class tst_logging;
 
@@ -127,9 +156,9 @@
 
 // ----- logging structure
 private slots:
-    void onLog(const QString &vContent, LogType vLogType);
+    void onLog  (const QString &vContent, LogType vLogType);
 private:
-    void log            (const QString &vContent, LogType vLogType);
+    void log    (const QString &vContent, LogType vLogType);
 signals:
     /*!
      * \brief   didLog