Use plain routes list for os-server-external-events endpoint

This patch adds os-server-external-events related routes
by a plain list, instead of using stevedore. After all the Nova
API endpoints moves to the plain routes list, the usage of stevedore
for API loading will be removed from Nova.

Partial-implement-blueprint api-no-more-extensions-pike

Change-Id: I112f096e74ce363e259b55b7155b6ec738c40e1d

nova/api/openstack/compute/routes.py

@@ -58,6 +58,7 @@ from nova.api.openstack.compute import quota_sets
 from nova.api.openstack.compute import remote_consoles
 from nova.api.openstack.compute import rescue
 from nova.api.openstack.compute import security_groups
+from nova.api.openstack.compute import server_external_events
 from nova.api.openstack.compute import server_metadata
 from nova.api.openstack.compute import server_migrations
 from nova.api.openstack.compute import server_password
@@ -215,6 +216,10 @@ server_controller = functools.partial(_create_controller,
 )
 
 
+server_external_events_controller = functools.partial(_create_controller,
+    server_external_events.ServerExternalEventsController, [], [])
+
+
 server_metadata_controller = functools.partial(_create_controller,
     server_metadata.ServerMetadataController, [], [])
 
@@ -389,6 +394,9 @@ ROUTE_LIST = (
     ('/os-quota-sets/{id}/defaults', {
         'GET': [quota_set_controller, 'defaults']
     }),
+    ('/os-server-external-events', {
+        'POST': [server_external_events_controller, 'create']
+    }),
     ('/os-simple-tenant-usage', {
         'GET': [simple_tenant_usage_controller, 'index']
     }),

nova/api/openstack/compute/server_external_events.py

@@ -28,7 +28,6 @@ from nova.policies import server_external_events as see_policies
 
 
 LOG = logging.getLogger(__name__)
-ALIAS = 'os-server-external-events'
 
 
 class ServerExternalEventsController(wsgi.Controller):
@@ -128,20 +127,3 @@ class ServerExternalEventsController(wsgi.Controller):
         robj = wsgi.ResponseObject({'events': response_events})
         robj._code = result
         return robj
-
-
-class ServerExternalEvents(extensions.V21APIExtensionBase):
-    """Server External Event Triggers."""
-
-    name = "ServerExternalEvents"
-    alias = ALIAS
-    version = 1
-
-    def get_resources(self):
-        resource = extensions.ResourceExtension(ALIAS,
-                ServerExternalEventsController())
-
-        return [resource]
-
-    def get_controller_extensions(self):
-        return []

setup.cfg

@@ -95,7 +95,6 @@ nova.api.v21.extensions =
     security_group_default_rules = nova.api.openstack.compute.security_group_default_rules:SecurityGroupDefaultRules
     security_groups = nova.api.openstack.compute.security_groups:SecurityGroups
     server_diagnostics = nova.api.openstack.compute.server_diagnostics:ServerDiagnostics
-    server_external_events = nova.api.openstack.compute.server_external_events:ServerExternalEvents
     server_groups = nova.api.openstack.compute.server_groups:ServerGroups
     services = nova.api.openstack.compute.services:Services
     tenant_networks = nova.api.openstack.compute.tenant_networks:TenantNetworks