--- /dev/null
+# Copyright (C) 2021 Wind River Systems, Inc.
+#
+# 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.
+
+# pylint: disable=attribute-defined-outside-init
+from __future__ import annotations
+import abc
+
+from o2ims.domain.ocloud_repo import OcloudRepository,\
+ ResourcePoolRepository, ResourceRepository, ResourceTypeRepository,\
+ DeploymentManagerRepository
+from o2ims.domain.stx_repo import StxObjectRepository
+
+
+class AbstractUnitOfWork(abc.ABC):
+ oclouds: OcloudRepository
+ resource_types: ResourceTypeRepository
+ resource_pools: ResourcePoolRepository
+ resources: ResourceRepository
+ deployment_managers: DeploymentManagerRepository
+ stxobjects: StxObjectRepository
+
+ def __enter__(self):
+ return self
+
+ def __exit__(self, *args):
+ self.rollback()
+
+ def commit(self):
+ self._commit()
+
+ def collect_new_events(self):
+ return self._collect_new_events()
+
+ def _collect_new_events(self):
+ raise NotImplementedError
+
+ @abc.abstractmethod
+ def _commit(self):
+ raise NotImplementedError
+
+ @abc.abstractmethod
+ def rollback(self):
+ raise NotImplementedError