CORD-1244 Modify model_policies for OpenStack synchronizer

Change-Id: I8e946e3ca665689bd0449b80d87fe4bb29afde99
diff --git a/xos/synchronizer/model_policies/model_policy_Controller.py b/xos/synchronizer/model_policies/model_policy_Controller.py
index 680f252..45b0fae 100644
--- a/xos/synchronizer/model_policies/model_policy_Controller.py
+++ b/xos/synchronizer/model_policies/model_policy_Controller.py
@@ -1,66 +1,73 @@
 from collections import defaultdict
 from synchronizers.new_base.modelaccessor import *
+from synchronizers.new_base.policy import Policy
 
-def handle(controller):
-    # relations for all sites
-    ctrls_by_site = defaultdict(list)
-    ctrl_sites = ControllerSite.objects.all()
-    for ctrl_site in ctrl_sites:
-        ctrls_by_site[ctrl_site.site.id].append(ctrl_site.controller.id)
+class ControllerPolicy(Policy):
+    model_name = "Controller"
 
-    sites = Site.objects.all()
-    for site in sites:
-        if site.id not in ctrls_by_site or controller.id not in ctrls_by_site[site.id]:
-            controller_site = ControllerSite(controller=controller, site=site)
-            controller_site.save()
+    def handle_create(self, controller):
+        return self.handle_update(controller)
 
-    # relations for all slices
-    ctrls_by_slice = defaultdict(list)
-    ctrl_slices = ControllerSlice.objects.all()
-    for ctrl_slice in ctrl_slices:
-        ctrls_by_slice[ctrl_slice.slice.id].append(ctrl_slice.controller.id)
+    def handle_update(self, controller):
+        # relations for all sites
+        ctrls_by_site = defaultdict(list)
+        ctrl_sites = ControllerSite.objects.all()
+        for ctrl_site in ctrl_sites:
+            ctrls_by_site[ctrl_site.site.id].append(ctrl_site.controller.id)
 
-    slices = Slice.objects.all()
-    for slice in slices:
-        if slice.id not in ctrls_by_slice or controller.id not in ctrls_by_slice[slice.id]:
-            controller_slice = ControllerSlice(controller=controller, slice=slice)
-            controller_slice.save()
+        sites = Site.objects.all()
+        for site in sites:
+            if site.id not in ctrls_by_site or controller.id not in ctrls_by_site[site.id]:
+                controller_site = ControllerSite(controller=controller, site=site)
+                controller_site.save()
 
-    # relations for all users
-    ctrls_by_user = defaultdict(list)
-    ctrl_users = ControllerUser.objects.all()
-    for ctrl_user in ctrl_users:
-        ctrls_by_user[ctrl_user.user.id].append(ctrl_user.controller.id)
+        # relations for all slices
+        ctrls_by_slice = defaultdict(list)
+        ctrl_slices = ControllerSlice.objects.all()
+        for ctrl_slice in ctrl_slices:
+            ctrls_by_slice[ctrl_slice.slice.id].append(ctrl_slice.controller.id)
 
-    users = User.objects.all()
-    for user in users:
-        if user.id not in ctrls_by_user or controller.id not in ctrls_by_user[user.id]:
-            controller_user = ControllerUser(controller=controller, user=user)
-            controller_user.save()
+        slices = Slice.objects.all()
+        for slice in slices:
+            if slice.id not in ctrls_by_slice or controller.id not in ctrls_by_slice[slice.id]:
+                controller_slice = ControllerSlice(controller=controller, slice=slice)
+                controller_slice.save()
 
-    # relations for all networks
-    ctrls_by_network = defaultdict(list)
-    ctrl_networks = ControllerNetwork.objects.all()
-    for ctrl_network in ctrl_networks:
-        ctrls_by_network[ctrl_network.network.id].append(ctrl_network.controller.id)
+        # relations for all users
+        ctrls_by_user = defaultdict(list)
+        ctrl_users = ControllerUser.objects.all()
+        for ctrl_user in ctrl_users:
+            ctrls_by_user[ctrl_user.user.id].append(ctrl_user.controller.id)
 
-    networks = Network.objects.all()
-    for network in networks:
-        if network.id not in ctrls_by_network or controller.id not in ctrls_by_network[network.id]:
-            controller_network = ControllerNetwork(controller=controller, network=network)
-            if network.subnet and network.subnet.strip():
-                controller_network.subnet = network.subnet.strip()
-            controller_network.save()
+        users = User.objects.all()
+        for user in users:
+            if user.id not in ctrls_by_user or controller.id not in ctrls_by_user[user.id]:
+                controller_user = ControllerUser(controller=controller, user=user)
+                controller_user.save()
 
-    # relations for all images
-    ctrls_by_image = defaultdict(list)
-    ctrl_images = ControllerImages.objects.all()
-    for ctrl_image in ctrl_images:
-        ctrls_by_image[ctrl_image.image.id].append(ctrl_image.controller.id)
+        # relations for all networks
+        ctrls_by_network = defaultdict(list)
+        ctrl_networks = ControllerNetwork.objects.all()
+        for ctrl_network in ctrl_networks:
+            ctrls_by_network[ctrl_network.network.id].append(ctrl_network.controller.id)
 
-    images = Image.objects.all()
-    for image in images:
-        if image.id not in ctrls_by_image or controller.id not in ctrls_by_image[image.id]:
-            controller_image = ControllerImages(controller=controller, image=image)
-            controller_image.save()
+        networks = Network.objects.all()
+        for network in networks:
+            if network.id not in ctrls_by_network or controller.id not in ctrls_by_network[network.id]:
+                controller_network = ControllerNetwork(controller=controller, network=network)
+                if network.subnet and network.subnet.strip():
+                    controller_network.subnet = network.subnet.strip()
+                controller_network.save()
+
+        # relations for all images
+        ctrls_by_image = defaultdict(list)
+        ctrl_images = ControllerImages.objects.all()
+        for ctrl_image in ctrl_images:
+            ctrls_by_image[ctrl_image.image.id].append(ctrl_image.controller.id)
+
+        images = Image.objects.all()
+        for image in images:
+            if image.id not in ctrls_by_image or controller.id not in ctrls_by_image[image.id]:
+                controller_image = ControllerImages(controller=controller, image=image)
+                controller_image.save()