add show resource and list resources

Implements: blueprint get-topology-api
Change-Id: Ib14664f1798041ee06cfc8a5105a8c3525b5811d

etc/vitrage/policy.json

@@ -1,3 +1,5 @@
 {
-  "get topology": "role:admin"
+  "get topology": "role:admin",
+  "get resource": "role:admin",
+  "list resources": "role:admin"
 }

vitrage/api/controllers/v1/resource.py

@@ -0,0 +1,70 @@
+# 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.
+
+import pecan
+
+from oslo_log import log
+from pecan.core import abort
+from pecan import rest
+from vitrage.api.policy import enforce
+# noinspection PyProtectedMember
+from vitrage.i18n import _LI
+
+
+LOG = log.getLogger(__name__)
+
+
+class ResourcesController(rest.RestController):
+
+    @pecan.expose()
+    def _lookup(self, id_, *remainder):
+        LOG.info(_LI('got lookup %s') % id_)
+        return ResourceController(id_), remainder
+
+    @pecan.expose('json')
+    def index(self, resource_type=None):
+        enforce("list resources", pecan.request.headers,
+                pecan.request.enforcer, {})
+
+        LOG.info(_LI('received list resources with filter %s') % resource_type)
+
+        try:
+            return self.get_resources(resource_type)
+        except Exception as e:
+            LOG.exception("failed to get resources %s", e)
+            abort(404, str(e))
+
+    @staticmethod
+    def get_resources(resource_type):
+        return dict()
+
+
+class ResourceController(rest.RestController):
+
+    def __init__(self, id_):
+        self.id = id_
+
+    @pecan.expose('json')
+    def get(self):
+        enforce("get resource", pecan.request.headers,
+                pecan.request.enforcer, {})
+
+        LOG.info(_LI('received get resource with id %s') % self.id)
+        try:
+            return self.get_resource(self.id)
+        except Exception as e:
+            LOG.exception("failed to get resource %s", e)
+            abort(404, str(e))
+
+    @staticmethod
+    def get_resource(id_):
+        return dict()

vitrage/api/controllers/v1/root.py

@@ -10,8 +10,10 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from vitrage.api.controllers.v1 import resource
 from vitrage.api.controllers.v1 import topology
 
 
 class V1Controller(object):
     topology = topology.TopologyController()
+    resources = resource.ResourcesController()