[placement] Separate API schemas (trait)

In compute APIs, they have their schemas in the
independent directory (nova/api/openstack/compute/schemas).
Placement APIs should be like that as well.

This patch separates API schemas to an independent directory
(nova/api/openstack/placement/schemas)
from nova/api/openstack/placement/handlers/trait.py.

Subsequent patches will move schemas of other handlers.

Change-Id: Ieba7ca1e58d931c7cc0b11cb9313d37c5fb7cd3a

nova/api/openstack/placement/handlers/trait.py

@@ -11,8 +11,6 @@
 #    under the License.
 """Traits handlers for Placement API."""
 
-import copy
-
 import jsonschema
 from oslo_serialization import jsonutils
 from oslo_utils import encodeutils
@@ -20,52 +18,13 @@ from oslo_utils import timeutils
 import webob
 
 from nova.api.openstack.placement import microversion
+from nova.api.openstack.placement.schemas import trait as schema
 from nova.api.openstack.placement import util
 from nova.api.openstack.placement import wsgi_wrapper
 from nova import exception
 from nova.i18n import _
 from nova.objects import resource_provider as rp_obj
 
-TRAIT = {
-    "type": "string",
-    'minLength': 1, 'maxLength': 255,
-}
-
-CUSTOM_TRAIT = copy.deepcopy(TRAIT)
-CUSTOM_TRAIT.update({"pattern": "^CUSTOM_[A-Z0-9_]+$"})
-
-PUT_TRAITS_SCHEMA = {
-    "type": "object",
-    "properties": {
-        "traits": {
-            "type": "array",
-            "items": CUSTOM_TRAIT,
-        }
-    },
-    'required': ['traits'],
-    'additionalProperties': False
-}
-
-SET_TRAITS_FOR_RP_SCHEMA = copy.deepcopy(PUT_TRAITS_SCHEMA)
-SET_TRAITS_FOR_RP_SCHEMA['properties']['traits']['items'] = TRAIT
-SET_TRAITS_FOR_RP_SCHEMA['properties'][
-    'resource_provider_generation'] = {'type': 'integer'}
-SET_TRAITS_FOR_RP_SCHEMA['required'].append('resource_provider_generation')
-
-
-LIST_TRAIT_SCHEMA = {
-    "type": "object",
-    "properties": {
-        "name": {
-            "type": "string"
-        },
-        "associated": {
-            "type": "string",
-        }
-    },
-    "additionalProperties": False
-}
-
 
 def _normalize_traits_qs_param(qs):
     try:
@@ -109,7 +68,7 @@ def put_trait(req):
     name = util.wsgi_path_item(req.environ, 'name')
 
     try:
-        jsonschema.validate(name, CUSTOM_TRAIT)
+        jsonschema.validate(name, schema.CUSTOM_TRAIT)
     except jsonschema.ValidationError:
         raise webob.exc.HTTPBadRequest(
             _('The trait is invalid. A valid trait must be no longer than '
@@ -190,7 +149,7 @@ def list_traits(req):
     filters = {}
 
     try:
-        jsonschema.validate(dict(req.GET), LIST_TRAIT_SCHEMA,
+        jsonschema.validate(dict(req.GET), schema.LIST_TRAIT_SCHEMA,
                             format_checker=jsonschema.FormatChecker())
     except jsonschema.ValidationError as exc:
         raise webob.exc.HTTPBadRequest(
@@ -259,7 +218,7 @@ def update_traits_for_resource_provider(req):
     context = req.environ['placement.context']
     want_version = req.environ[microversion.MICROVERSION_ENVIRON]
     uuid = util.wsgi_path_item(req.environ, 'uuid')
-    data = util.extract_json(req.body, SET_TRAITS_FOR_RP_SCHEMA)
+    data = util.extract_json(req.body, schema.SET_TRAITS_FOR_RP_SCHEMA)
     rp_gen = data['resource_provider_generation']
     traits = data['traits']
     resource_provider = rp_obj.ResourceProvider.get_by_uuid(

nova/api/openstack/placement/schemas/trait.py

@@ -0,0 +1,53 @@
+#    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.
+"""Trait schemas for Placement API."""
+
+import copy
+
+TRAIT = {
+    "type": "string",
+    'minLength': 1, 'maxLength': 255,
+}
+
+CUSTOM_TRAIT = copy.deepcopy(TRAIT)
+CUSTOM_TRAIT.update({"pattern": "^CUSTOM_[A-Z0-9_]+$"})
+
+PUT_TRAITS_SCHEMA = {
+    "type": "object",
+    "properties": {
+        "traits": {
+            "type": "array",
+            "items": CUSTOM_TRAIT,
+        }
+    },
+    'required': ['traits'],
+    'additionalProperties': False
+}
+
+SET_TRAITS_FOR_RP_SCHEMA = copy.deepcopy(PUT_TRAITS_SCHEMA)
+SET_TRAITS_FOR_RP_SCHEMA['properties']['traits']['items'] = TRAIT
+SET_TRAITS_FOR_RP_SCHEMA['properties'][
+    'resource_provider_generation'] = {'type': 'integer'}
+SET_TRAITS_FOR_RP_SCHEMA['required'].append('resource_provider_generation')
+
+LIST_TRAIT_SCHEMA = {
+    "type": "object",
+    "properties": {
+        "name": {
+            "type": "string"
+        },
+        "associated": {
+            "type": "string",
+        }
+    },
+    "additionalProperties": False
+}