Github user mxmrlv commented on a diff in the pull request:
https://github.com/apache/incubator-ariatosca/pull/31#discussion_r90781017
--- Diff: aria/storage/sql_mapi.py ---
@@ -0,0 +1,361 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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 based MAPI
+"""
+
+from sqlalchemy.exc import SQLAlchemyError
+from sqlalchemy.sql.elements import Label
+
+from aria.utils.collections import OrderedDict
+
+from aria.storage import (
+ api,
+ exceptions
+)
+
+
+DEFAULT_SQL_DIALECT = 'sqlite'
+
+
+class SQLAlchemyModelAPI(api.ModelAPI):
+ """
+ SQL based MAPI.
+ """
+
+ def __init__(self,
+ engine,
+ session,
+ **kwargs):
+ super(SQLAlchemyModelAPI, self).__init__(**kwargs)
+ self._engine = engine
+ self._session = session
+
+ def get(self, entry_id, include=None, filters=None, locking=False,
**kwargs):
+ """Return a single result based on the model class and element ID
+ """
+ filters = filters or {'id': entry_id}
+ query = self._get_query(include, filters)
+ if locking:
+ query = query.with_for_update()
+ result = query.first()
+
+ if not result:
+ raise exceptions.StorageError(
+ 'Requested {0} with ID `{1}` was not found'
--- End diff --
no need anymore
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