[CalendarServer-changes] [5517] CalendarServer/branches/users/wsanchez/transations/txdav/idav.py

[source_changes at macosforge.org]

Revision: 5517
          http://trac.macosforge.org/projects/calendarserver/changeset/5517
Author:   wsanchez at apple.com
Date:     2010-04-22 17:27:14 -0700 (Thu, 22 Apr 2010)
Log Message:
-----------
Add ITransaction

Modified Paths:
--------------
    CalendarServer/branches/users/wsanchez/transations/txdav/idav.py

Modified: CalendarServer/branches/users/wsanchez/transations/txdav/idav.py
===================================================================
--- CalendarServer/branches/users/wsanchez/transations/txdav/idav.py	2010-04-23 00:26:53 UTC (rev 5516)
+++ CalendarServer/branches/users/wsanchez/transations/txdav/idav.py	2010-04-23 00:27:14 UTC (rev 5517)
@@ -84,3 +84,25 @@
         """
         Abort any pending changes.
         """
+
+
+class ITransaction(Interface):
+    """
+    Transaction that can be aborted and either succeeds or fails in
+    its entirety.
+    """
+    def abort():
+        """
+        Abort this transaction.
+        """
+
+    def commit():
+        """
+        Perform this transaction.
+        """
+
+
+class AbortedTransactionError(RuntimeError):
+    """
+    This transaction has aborted.  Go away.
+    """
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