Merge "db: Remove layer of indirection"

1 files changed, 25 insertions, 0 deletions

diff --git a/heat/db/utils.py b/heat/db/utils.py
new file mode 100644
index 000000000..67e2d541e
--- /dev/null
+++ b/heat/db/utils.py
@@ -0,0 +1,25 @@
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+# SQLAlchemy helper functions
+
+from sqlalchemy.orm import exc
+import tenacity
+
+
+def retry_on_stale_data_error(func):
+    wrapper = tenacity.retry(
+        stop=tenacity.stop_after_attempt(3),
+        retry=tenacity.retry_if_exception_type(exc.StaleDataError),
+        reraise=True)
+    return wrapper(func)