+# Copyright (C) 2021 Wind River Systems, Inc.\r
+#\r
+# Licensed under the Apache License, Version 2.0 (the "License");\r
+# you may not use this file except in compliance with the License.\r
+# You may obtain a copy of the License at\r
+#\r
+# http://www.apache.org/licenses/LICENSE-2.0\r
+#\r
+# Unless required by applicable law or agreed to in writing, software\r
+# distributed under the License is distributed on an "AS IS" BASIS,\r
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+# See the License for the specific language governing permissions and\r
+# limitations under the License.\r
+\r
+# from logging import exception\r
+# from cgtsclient import exc\r
+from o2ims.service.client.base_client import BaseClient\r
+# from o2ims.domain.stx_object import StxGenericModel\r
+# from o2ims.service.unit_of_work import AbstractUnitOfWork\r
+from o2ims.domain import commands\r
+from o2ims.service.messagebus import MessageBus\r
+from o2common.helper import o2logging\r
+logger = o2logging.get_logger(__name__)\r
+\r
+\r
+class BaseWatcher(object):\r
+ def __init__(self, client: BaseClient,\r
+ bus: MessageBus) -> None:\r
+ super().__init__()\r
+ self._client = client\r
+ self._bus = bus\r
+ # self._uow = bus.uow\r
+\r
+ def targetname(self) -> str:\r
+ return self._targetname()\r
+\r
+ def probe(self, parent: commands.UpdateStxObject = None):\r
+ try:\r
+ cmds = self._probe(parent.data if parent else None)\r
+ for cmd in cmds:\r
+ self._bus.handle(cmd)\r
+\r
+ # return self._probe(parent)\r
+ return cmds\r
+ except Exception as ex:\r
+ logger.warning("Failed to probe resource due to: " + str(ex))\r
+ return []\r
+\r
+ def _probe(self, parent: object = None) -> commands.UpdateStxObject:\r
+ raise NotImplementedError\r
+\r
+ def _targetname(self):\r
+ raise NotImplementedError\r
+\r
+ # def _compare_and_update(self, newmodel: StxGenericModel) -> bool:\r
+ # with self._uow:\r
+ # # localmodel = self._uow.stxobjects.get(ocloudmodel.id)\r
+ # localmodel = self._uow.stxobjects.get(str(newmodel.id))\r
+ # if not localmodel:\r
+ # logger.info("add entry:" + newmodel.name)\r
+ # self._uow.stxobjects.add(newmodel)\r
+ # elif localmodel.is_outdated(newmodel):\r
+ # logger.info("update entry:" + newmodel.name)\r
+ # localmodel.update_by(newmodel)\r
+ # self._uow.stxobjects.update(localmodel)\r
+ # self._uow.commit()\r
+\r
+\r
+# node to organize watchers in tree hierachy\r
+class WatcherTree(object):\r
+ def __init__(self, watcher: BaseWatcher) -> None:\r
+ super().__init__()\r
+ self.watcher = watcher\r
+ self.children = {}\r
+\r
+ def addchild(self, watcher: BaseWatcher) -> object:\r
+ child = WatcherTree(watcher)\r
+ self.children[watcher.targetname()] = child\r
+ return child\r
+\r
+ def removechild(self, targetname: str) -> object:\r
+ return self.children.pop(targetname)\r
+\r
+ # probe all resources by parent, depth = 0 for indefinite recursive\r
+ def probe(self, parentresource=None, depth: int = 0):\r
+ logger.debug("probe resources with watcher: "\r
+ + self.watcher.targetname())\r
+ childdepth = depth - 1 if depth > 0 else 0\r
+ resources = self.watcher.probe(parentresource)\r
+ logger.debug("probe returns " + str(len(resources)) + " resources")\r
+\r
+ if depth == 1:\r
+ # stop recursive\r
+ return\r
+\r
+ for res in resources:\r
+ for targetname in self.children.keys():\r
+ self.children[targetname].probe(res, childdepth)\r