Merge branch 'warning-non-flushed-mysql-cache' into test-v3

mysqlred.py

@@ -31,6 +31,8 @@ try:
 except ImportError:
     import MySQLdb as mysqldb
 
+import atexit
+
 from pywikibot import config
 
 import jogobot
@@ -73,6 +75,9 @@ class MysqlRed:
                 passwd=type( self ).db_password,
                 db=type( self ).db_name )
 
+            # Register callback for warnig if exit with cached db write querys
+            atexit.register( type(self).warn_if_not_flushed )
+
     def __del__( self ):
         """
         Before deleting class, close connection to MySQL-DB
@@ -108,6 +113,16 @@ class MysqlRed:
         if cls._cached_insert_data or cls._cached_update_data:
             cls.connection.commit()
 
+    @classmethod
+    def warn_if_not_flushed(cls):
+        """
+        Outputs a warning if there are db write querys cached and not flushed
+        before exiting programm!
+        """
+        if cls._cached_update_data or cls._cached_insert_data:
+            jogobot.output( "Cached Database write querys not flushed!!! " +
+                            "Data loss is possible!", "WARNING" )
+
 
 class MysqlRedPage( MysqlRed ):
     """