[entropy.db.exceptions] introduce RestartTransaction exception

Exception raised in case the whole transaction has been aborted by the database and caller is kindly required to restart it from the beginning.
2012-08-14 19:25:22 +02:00
parent 760685674e
commit 9a699e7ae8
1 changed files with 5 additions and 0 deletions
@@ -68,3 +68,8 @@ class NotSupportedError(Error):
        .rollback() on a connection that does not support
        transaction or has transactions turned off.  It must be a
        subclass of DatabaseError. """
+
+class RestartTransaction(Error):
+    """ Exception raised in case the whole transaction has
+        been aborted by the database and caller is kindly
+        required to restart it from the beginning. """