[CalendarServer-changes] [8324] CalendarServer/branches/users/glyph/multiget-delete/txdav/common/ icommondatastore.py

source_changes at macosforge.org source_changes at macosforge.org
Fri Nov 18 10:13:41 PST 2011


Revision: 8324
          http://trac.macosforge.org/projects/calendarserver/changeset/8324
Author:   glyph at apple.com
Date:     2011-11-18 10:13:41 -0800 (Fri, 18 Nov 2011)
Log Message:
-----------
concurrent modification exception with docstring

Modified Paths:
--------------
    CalendarServer/branches/users/glyph/multiget-delete/txdav/common/icommondatastore.py

Modified: CalendarServer/branches/users/glyph/multiget-delete/txdav/common/icommondatastore.py
===================================================================
--- CalendarServer/branches/users/glyph/multiget-delete/txdav/common/icommondatastore.py	2011-11-18 18:13:31 UTC (rev 8323)
+++ CalendarServer/branches/users/glyph/multiget-delete/txdav/common/icommondatastore.py	2011-11-18 18:13:41 UTC (rev 8324)
@@ -35,6 +35,7 @@
     "NotFoundError",
     "NoSuchHomeChildError",
     "NoSuchObjectResourceError",
+    "ConcurrentModification",
     "InvalidObjectResourceError",
     "InternalDataStoreError",
 ]
@@ -98,6 +99,18 @@
     The requested object resource does not exist.
     """
 
+class ConcurrentModification(NotFoundError):
+    """
+    Despite being loaded in the current transaction, the object whose data is
+    being requested has been deleted or modified in another transaction, and
+    therefore that data can no longer be retrieved.
+
+    (Note: in the future we should be able to avoid these types of errors with
+    more usage of locking, but until the impact of that on performance is
+    determined, callers of C{component()} need to be aware that this can
+    happen.)
+    """
+
 class InvalidObjectResourceError(CommonStoreError):
     """
     Invalid object resource data.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.macosforge.org/pipermail/calendarserver-changes/attachments/20111118/6063e287/attachment.html>


More information about the calendarserver-changes mailing list