The utils module and its LazyPluggable class are abandoned and need to be cleaned up. A search of the code base shows no from senlin.db import utils. Database calls are done through senlin.db.api

Change-Id: I89055876fab6d1a060b9609ce883f0e6812fc478

senlin/db/utils.py

@@ -1,41 +0,0 @@
-# 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.
-
-
-class LazyPluggable(object):
-    """A pluggable backend loaded lazily based on some value."""
-
-    def __init__(self, pivot, **backends):
-        self.__backends = backends
-        self.__pivot = pivot
-        self.__backend = None
-
-    def __get_backend(self):
-        if not self.__backend:
-            backend_name = 'sqlalchemy'
-            backend = self.__backends[backend_name]
-            if isinstance(backend, tuple):
-                name = backend[0]
-                fromlist = backend[1]
-            else:
-                name = backend
-                fromlist = backend
-
-            self.__backend = __import__(name, None, None, fromlist)
-        return self.__backend
-
-    def __getattr__(self, key):
-        backend = self.__get_backend()
-        return getattr(backend, key)
-
-
-IMPL = LazyPluggable('backend', sqlalchemy='senlin.db.sqlalchemy.api')