[CORD-3057] Basic OSS Service implementation

Change-Id: Ieacda8b3e4518fb133e97baaab554356d4e6bc3c
diff --git a/xos/synchronizer/model_policies/model_policy_hippieossserviceinstance.py b/xos/synchronizer/model_policies/model_policy_hippieossserviceinstance.py
new file mode 100644
index 0000000..543c0df
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+++ b/xos/synchronizer/model_policies/model_policy_hippieossserviceinstance.py
@@ -0,0 +1,42 @@
+
+# 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 RCORDSubscriber, model_accessor
+from synchronizers.new_base.policy import Policy
+
+class OSSServiceInstancePolicy(Policy):
+    model_name = "HippieOSSServiceInstance"
+
+    def handle_update(self, si):
+        self.logger.debug("MODEL_POLICY: handle_update for HippieOSSServiceInstance %s " % si.id)
+        if not si.valid:
+            # NOTE we don't do anything if the ONU has not been activated
+            self.logger.debug("MODEL_POLICY: skipping handle_update for HippieOSSServiceInstance %s as valid is %s" % (si.id, si.valid))
+            pass
+        else:
+            self.logger.debug("MODEL_POLICY: creating RCORDSubscriber for HippieOSSServiceInstance %s as valid is %s" % (si.id, si.valid))
+            subscriber = RCORDSubscriber()
+            subscriber.onu_device = si.serial_number
+            subscriber.uni_port_id = si.uni_port_id
+
+            # If the OSS returns a c_tag use that one
+            if si.c_tag:
+                subscriber.c_tag = si.c_tag
+
+            subscriber.save()
+
+    def handle_delete(self, si):
+        pass