--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/openstack/neutron/files/evs/migrate/havana_api.py	Tue Apr 07 13:31:20 2015 -0700
@@ -0,0 +1,102 @@
+#
+# Copyright (c) 2015, Oracle and/or its affiliates. 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.
+#
+
+import ConfigParser
+
+from sqlalchemy.ext import declarative
+from sqlalchemy import orm
+import sqlalchemy as sa
+
+from neutron.context import ContextBase
+from neutron.db import model_base
+from neutron.openstack.common import uuidutils
+
+EVS_DB_BASE = declarative.declarative_base(cls=model_base.NeutronBaseV2)
+EVS_DB_ENGINE = None
+EVS_DB_MAKER = None
+
+
+class EVSContext(ContextBase):
+    @property
+    def session(self):
+        return self._session
+
+    @session.setter
+    def session(self, session):
+        self._session = session
+
+
+def configure_db():
+    global EVS_DB_ENGINE
+    if not EVS_DB_ENGINE:
+        config = ConfigParser.RawConfigParser()
+        config.readfp(open("/etc/neutron/neutron.conf"))
+        if config.has_option("database", 'connection'):
+            sql_connection = config.get("database", 'connection')
+        else:
+            sql_connection = 'sqlite:////var/lib/neutron/neutron.sqlite'
+        EVS_DB_ENGINE = sa.create_engine(sql_connection, echo=False)
+        EVS_DB_BASE.metadata.create_all(EVS_DB_ENGINE)
+
+
+def get_session(autocommit=True, expire_on_commit=False):
+    global EVS_DB_ENGINE, EVS_DB_MAKER
+    assert EVS_DB_ENGINE
+    if not EVS_DB_MAKER:
+        EVS_DB_MAKER = orm.sessionmaker(bind=EVS_DB_ENGINE,
+                                        autocommit=autocommit,
+                                        expire_on_commit=expire_on_commit)
+    return EVS_DB_MAKER()
+
+
+def get_evs_context(context):
+    """Overrides the Neutron DB session with EVS DB session"""
+
+    evs_context = EVSContext.from_dict(context.to_dict())
+    evs_context.session = get_session()
+
+    return evs_context
+
+
+class Router(EVS_DB_BASE):
+    """Represents a v2 neutron router."""
+
+    id = sa.Column(sa.String(36), primary_key=True,
+                   default=uuidutils.generate_uuid)
+    name = sa.Column(sa.String(255))
+    status = sa.Column(sa.String(16))
+    admin_state_up = sa.Column(sa.Boolean)
+    tenant_id = sa.Column(sa.String(255))
+    gw_port_id = sa.Column(sa.String(36))
+    gw_port_network_id = sa.Column(sa.String(36))
+
+
+class FloatingIP(EVS_DB_BASE):
+    """Represents a floating IP address.
+
+    This IP address may or may not be allocated to a tenant, and may or
+    may not be associated with an internal port/ip address/router.
+    """
+
+    id = sa.Column(sa.String(36), primary_key=True,
+                   default=uuidutils.generate_uuid)
+    floating_ip_address = sa.Column(sa.String(64), nullable=False)
+    floating_network_id = sa.Column(sa.String(36), nullable=False)
+    floating_port_id = sa.Column(sa.String(36), nullable=False)
+    fixed_port_id = sa.Column(sa.String(36))
+    fixed_ip_address = sa.Column(sa.String(64))
+    router_id = sa.Column(sa.String(36), sa.ForeignKey('routers.id'))
+    tenant_id = sa.Column(sa.String(255))