Add basic InstanceFault model

This adds a basic InstanceFault model, list, and tests.

Related to blueprint unified-objet-model

Change-Id: I9226bc1f6e21d298b6d5d8694d336d38e471846d

1 files changed, 61 insertions, 0 deletions

diff --git a/nova/objects/instance_fault.py b/nova/objects/instance_fault.py
new file mode 100644
index 000000000..d6f7a6140
--- /dev/null
+++ b/nova/objects/instance_fault.py
@@ -0,0 +1,61 @@
+#    Copyright 2013 IBM Corp.
+#
+#    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 nova import db
+from nova.objects import base
+from nova.objects import utils as obj_utils
+
+
+class InstanceFault(base.NovaObject):
+    fields = {
+        'id': int,
+        'instance_uuid': str,
+        'code': int,
+        'message': obj_utils.str_or_none,
+        'details': obj_utils.str_or_none,
+        'host': obj_utils.str_or_none,
+        }
+
+    @staticmethod
+    def _from_db_object(fault, db_fault):
+        # NOTE(danms): These are identical right now
+        for key in fault.fields:
+            fault[key] = db_fault[key]
+        fault.obj_reset_changes()
+        return fault
+
+    @base.remotable_classmethod
+    def get_latest_for_instance(cls, context, instance_uuid):
+        db_faults = db.instance_fault_get_by_instance_uuids(context,
+                                                            [instance_uuid])
+        if instance_uuid in db_faults and db_faults[instance_uuid]:
+            return cls._from_db_object(cls(), db_faults[instance_uuid][0])
+
+
+def _make_fault_list(faultlist, db_faultlist):
+    faultlist.objects = []
+    for instance_uuid in db_faultlist:
+        for db_fault in db_faultlist[instance_uuid]:
+            faultlist.objects.append(InstanceFault._from_db_object(
+                InstanceFault(), db_fault))
+    faultlist.obj_reset_changes()
+    return faultlist
+
+
+class InstanceFaultList(base.ObjectListBase, base.NovaObject):
+    @base.remotable_classmethod
+    def get_by_instance_uuids(cls, context, instance_uuids):
+        db_faults = db.instance_fault_get_by_instance_uuids(context,
+                                                            instance_uuids)
+        return _make_fault_list(cls(), db_faults)