Optimizes API Calls

Through additional profiling, I found a few more places where
caching could be enabled to reduce network calls and speed up
page load times slightly.  This patch adds caching to frequently
used methods and provides for minor improvements.  Tested in both
virt and baremetal environments.

Change-Id: I768d6643c4523d33c440a13f5ddc5212555956a8

tuskar_ui/api/heat.py

@@ -34,6 +34,7 @@ from tuskar_ui.utils import utils
 LOG = logging.getLogger(__name__)
 
 
+@memoized.memoized
 def overcloud_keystoneclient(request, endpoint, password):
     """Returns a client connected to the Keystone backend.
 

tuskar_ui/api/node.py

@@ -56,6 +56,7 @@ IRONIC_DISCOVERD_URL = getattr(settings, 'IRONIC_DISCOVERD_URL', None)
 LOG = logging.getLogger(__name__)
 
 
+@memoized.memoized
 def ironicclient(request):
     api_version = 1
     kwargs = {'os_auth_token': request.user.token.id,
@@ -156,6 +157,7 @@ class Node(base.APIResourceWrapper):
         return cls(node, request)
 
     @classmethod
+    @memoized.memoized
     @handle_errors(_("Unable to retrieve node"))
     def get(cls, request, uuid):
         """Return the Node that matches the ID
@@ -199,6 +201,7 @@ class Node(base.APIResourceWrapper):
         return cls(node, request, server)
 
     @classmethod
+    @memoized.memoized
     @handle_errors(_("Unable to retrieve nodes"), [])
     def list(cls, request, associated=None, maintenance=None):
         """Return a list of Nodes
@@ -302,6 +305,7 @@ class Node(base.APIResourceWrapper):
         return cls(node, request)
 
     @classmethod
+    @memoized.memoized
     def list_ports(cls, request, uuid):
         """Return a list of ports associated with this Node
 

tuskar_ui/api/tuskar.py

@@ -352,6 +352,7 @@ class Role(base.APIResourceWrapper):
         self._request = request
 
     @classmethod
+    @memoized.memoized
     @handle_errors(_("Unable to retrieve overcloud roles"), [])
     def list(cls, request):
         """Return a list of Overcloud Roles in Tuskar
@@ -367,6 +368,7 @@ class Role(base.APIResourceWrapper):
         return [cls(role, request=request) for role in roles]
 
     @classmethod
+    @memoized.memoized
     @handle_errors(_("Unable to retrieve overcloud role"))
     def get(cls, request, role_id):
         """Return the Tuskar Role that matches the ID