Removing dependency on trove models in the guest agent

Reasons:
 - The guest agent is importing backup models and agent
   heartbeat, this triggers the all of the trove database
   setup logic which bloats the guest process on the host.

 - Moving the state to its own module and removing an unused
   function decreases the memory usage by about 15 - 20 megs.

Closes-Bug: #1375311
Change-Id: I126c0b89c170b325d85b3f09afca399b4f5de9e8

2 files changed, 27 insertions, 11 deletions

diff --git a/trove/backup/models.py b/trove/backup/models.py
index eba19f4f..023e5e7d 100644
--- a/trove/backup/models.py
+++ b/trove/backup/models.py
@@ -17,6 +17,7 @@
 from sqlalchemy import desc
 from swiftclient.client import ClientException
 
+from trove.backup.state import BackupState
 from trove.common import cfg
 from trove.common import exception
 from trove.db.models import DatabaseModelBase
@@ -33,17 +34,6 @@ CONF = cfg.CONF
 LOG = logging.getLogger(__name__)
 
 
-class BackupState(object):
-    NEW = "NEW"
-    BUILDING = "BUILDING"
-    SAVING = "SAVING"
-    COMPLETED = "COMPLETED"
-    FAILED = "FAILED"
-    DELETE_FAILED = "DELETE_FAILED"
-    RUNNING_STATES = [NEW, BUILDING, SAVING]
-    END_STATES = [COMPLETED, FAILED, DELETE_FAILED]
-
-
 class Backup(object):
 
     @classmethod
diff --git a/trove/backup/state.py b/trove/backup/state.py
new file mode 100644
index 00000000..b0c46766
--- /dev/null
+++ b/trove/backup/state.py
@@ -0,0 +1,26 @@
+# Copyright 2014 OpenStack Foundation
+# All Rights Reserved.
+#
+#    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.
+#
+
+
+class BackupState(object):
+    NEW = "NEW"
+    BUILDING = "BUILDING"
+    SAVING = "SAVING"
+    COMPLETED = "COMPLETED"
+    FAILED = "FAILED"
+    DELETE_FAILED = "DELETE_FAILED"
+    RUNNING_STATES = [NEW, BUILDING, SAVING]
+    END_STATES = [COMPLETED, FAILED, DELETE_FAILED]