| # Copyright 2017-present Open Networking Foundation |
| # |
| # 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. |
| |
| |
| from synchronizers.new_base.modelaccessor import ServiceInstanceLink, model_accessor |
| from synchronizers.new_base.policy import Policy |
| |
| class RCORDSubscriberPolicy(Policy): |
| model_name = "RCORDSubscriber" |
| |
| def handle_create(self, si): |
| return self.handle_update(si) |
| |
| def handle_update(self, si): |
| |
| if si.status == "pre-provisioned": |
| self.logger.debug("MODEL_POLICY: Skipping chain creation as RCORDSubscriber %s is in 'pre-provisioned' state" % si.id) |
| return |
| |
| chain = si.subscribed_links.all() |
| |
| # Already has a chain |
| if len(chain) > 0: |
| self.logger.debug("MODEL_POLICY: RCORDSubscriber %s is already part of a chain" % si.id) |
| if si.status == "awaiting-auth" or si.status == "auth-failed" or si.status == "disabled": |
| # delete chain |
| self.logger.debug("MODEL_POLICY: deleting RCORDSubscriber chain from %s" % si.id, status=si.status) |
| for link in chain: |
| self.logger.debug("Removing link %s" % link.id, provider_service=link.provider_service_instance.leaf_model, subscriber_service=link.subscriber_service_instance.leaf_model) |
| link.delete() |
| link.provider_service_instance.leaf_model.delete() |
| |
| else: |
| if si.status != "enabled": |
| self.logger.debug("MODEL_POLICY: NOT creating RCORDSubscriber chain for %s" % si.id, status=si.status) |
| else: |
| self.logger.debug("MODEL_POLICY: creating RCORDSubscriber chain for %s" % si.id, status=si.status) |
| # if it does not have a chain, |
| # Find links to the next element in the service chain |
| # and create one |
| links = si.owner.subscribed_dependencies.all() |
| |
| for link in links: |
| si_class = link.provider_service.get_service_instance_class_name() |
| self.logger.info("MODEL_POLICY: RCORDSubscriber %s creating %s" % (si, si_class)) |
| |
| eastbound_si_class = model_accessor.get_model_class(si_class) |
| eastbound_si = eastbound_si_class() |
| eastbound_si.owner_id = link.provider_service_id |
| eastbound_si.save() |
| link = ServiceInstanceLink(provider_service_instance=eastbound_si, subscriber_service_instance=si) |
| link.save() |
| |
| def handle_delete(self, si): |
| pass |